blob: 74c7cd12aa2db5a022113e2e75fa11cfe87bb9e9 [file] [log] [blame]
// dear imgui, v1.84 WIP
// (tables and columns code)
/*
Index of this file:
// [SECTION] Commentary
// [SECTION] Header mess
// [SECTION] Tables: Main code
// [SECTION] Tables: Simple accessors
// [SECTION] Tables: Row changes
// [SECTION] Tables: Columns changes
// [SECTION] Tables: Columns width management
// [SECTION] Tables: Drawing
// [SECTION] Tables: Sorting
// [SECTION] Tables: Headers
// [SECTION] Tables: Context Menu
// [SECTION] Tables: Settings (.ini data)
// [SECTION] Tables: Garbage Collection
// [SECTION] Tables: Debugging
// [SECTION] Columns, BeginColumns, EndColumns, etc.
*/
// Navigating this file:
// - In Visual Studio IDE: CTRL+comma ("Edit.NavigateTo") can follow symbols in comments, whereas CTRL+F12 ("Edit.GoToImplementation") cannot.
// - With Visual Assist installed: ALT+G ("VAssistX.GoToImplementation") can also follow symbols in comments.
//-----------------------------------------------------------------------------
// [SECTION] Commentary
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// Typical tables call flow: (root level is generally public API):
//-----------------------------------------------------------------------------
// - BeginTable() user begin into a table
// | BeginChild() - (if ScrollX/ScrollY is set)
// | TableBeginInitMemory() - first time table is used
// | TableResetSettings() - on settings reset
// | TableLoadSettings() - on settings load
// | TableBeginApplyRequests() - apply queued resizing/reordering/hiding requests
// | - TableSetColumnWidth() - apply resizing width (for mouse resize, often requested by previous frame)
// | - TableUpdateColumnsWeightFromWidth()- recompute columns weights (of stretch columns) from their respective width
// - TableSetupColumn() user submit columns details (optional)
// - TableSetupScrollFreeze() user submit scroll freeze information (optional)
//-----------------------------------------------------------------------------
// - TableUpdateLayout() [Internal] followup to BeginTable(): setup everything: widths, columns positions, clipping rectangles. Automatically called by the FIRST call to TableNextRow() or TableHeadersRow().
// | TableSetupDrawChannels() - setup ImDrawList channels
// | TableUpdateBorders() - detect hovering columns for resize, ahead of contents submission
// | TableDrawContextMenu() - draw right-click context menu
//-----------------------------------------------------------------------------
// - TableHeadersRow() or TableHeader() user submit a headers row (optional)
// | TableSortSpecsClickColumn() - when left-clicked: alter sort order and sort direction
// | TableOpenContextMenu() - when right-clicked: trigger opening of the default context menu
// - TableGetSortSpecs() user queries updated sort specs (optional, generally after submitting headers)
// - TableNextRow() user begin into a new row (also automatically called by TableHeadersRow())
// | TableEndRow() - finish existing row
// | TableBeginRow() - add a new row
// - TableSetColumnIndex() / TableNextColumn() user begin into a cell
// | TableEndCell() - close existing column/cell
// | TableBeginCell() - enter into current column/cell
// - [...] user emit contents
//-----------------------------------------------------------------------------
// - EndTable() user ends the table
// | TableDrawBorders() - draw outer borders, inner vertical borders
// | TableMergeDrawChannels() - merge draw channels if clipping isn't required
// | EndChild() - (if ScrollX/ScrollY is set)
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// TABLE SIZING
//-----------------------------------------------------------------------------
// (Read carefully because this is subtle but it does make sense!)
//-----------------------------------------------------------------------------
// About 'outer_size':
// Its meaning needs to differ slightly depending on if we are using ScrollX/ScrollY flags.
// Default value is ImVec2(0.0f, 0.0f).
// X
// - outer_size.x <= 0.0f -> Right-align from window/work-rect right-most edge. With -FLT_MIN or 0.0f will align exactly on right-most edge.
// - outer_size.x > 0.0f -> Set Fixed width.
// Y with ScrollX/ScrollY disabled: we output table directly in current window
// - outer_size.y < 0.0f -> Bottom-align (but will auto extend, unless _NoHostExtendY is set). Not meaningful is parent window can vertically scroll.
// - outer_size.y = 0.0f -> No minimum height (but will auto extend, unless _NoHostExtendY is set)
// - outer_size.y > 0.0f -> Set Minimum height (but will auto extend, unless _NoHostExtenY is set)
// Y with ScrollX/ScrollY enabled: using a child window for scrolling
// - outer_size.y < 0.0f -> Bottom-align. Not meaningful is parent window can vertically scroll.
// - outer_size.y = 0.0f -> Bottom-align, consistent with BeginChild(). Not recommended unless table is last item in parent window.
// - outer_size.y > 0.0f -> Set Exact height. Recommended when using Scrolling on any axis.
//-----------------------------------------------------------------------------
// Outer size is also affected by the NoHostExtendX/NoHostExtendY flags.
// Important to that note how the two flags have slightly different behaviors!
// - ImGuiTableFlags_NoHostExtendX -> Make outer width auto-fit to columns (overriding outer_size.x value). Only available when ScrollX/ScrollY are disabled and Stretch columns are not used.
// - ImGuiTableFlags_NoHostExtendY -> Make outer height stop exactly at outer_size.y (prevent auto-extending table past the limit). Only available when ScrollX/ScrollY is disabled. Data below the limit will be clipped and not visible.
// In theory ImGuiTableFlags_NoHostExtendY could be the default and any non-scrolling tables with outer_size.y != 0.0f would use exact height.
// This would be consistent but perhaps less useful and more confusing (as vertically clipped items are not easily noticeable)
//-----------------------------------------------------------------------------
// About 'inner_width':
// With ScrollX disabled:
// - inner_width -> *ignored*
// With ScrollX enabled:
// - inner_width < 0.0f -> *illegal* fit in known width (right align from outer_size.x) <-- weird
// - inner_width = 0.0f -> fit in outer_width: Fixed size columns will take space they need (if avail, otherwise shrink down), Stretch columns becomes Fixed columns.
// - inner_width > 0.0f -> override scrolling width, generally to be larger than outer_size.x. Fixed column take space they need (if avail, otherwise shrink down), Stretch columns share remaining space!
//-----------------------------------------------------------------------------
// Details:
// - If you want to use Stretch columns with ScrollX, you generally need to specify 'inner_width' otherwise the concept
// of "available space" doesn't make sense.
// - Even if not really useful, we allow 'inner_width < outer_size.x' for consistency and to facilitate understanding
// of what the value does.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// COLUMNS SIZING POLICIES
//-----------------------------------------------------------------------------
// About overriding column sizing policy and width/weight with TableSetupColumn():
// We use a default parameter of 'init_width_or_weight == -1'.
// - with ImGuiTableColumnFlags_WidthFixed, init_width <= 0 (default) --> width is automatic
// - with ImGuiTableColumnFlags_WidthFixed, init_width > 0 (explicit) --> width is custom
// - with ImGuiTableColumnFlags_WidthStretch, init_weight <= 0 (default) --> weight is 1.0f
// - with ImGuiTableColumnFlags_WidthStretch, init_weight > 0 (explicit) --> weight is custom
// Widths are specified _without_ CellPadding. If you specify a width of 100.0f, the column will be cover (100.0f + Padding * 2.0f)
// and you can fit a 100.0f wide item in it without clipping and with full padding.
//-----------------------------------------------------------------------------
// About default sizing policy (if you don't specify a ImGuiTableColumnFlags_WidthXXXX flag)
// - with Table policy ImGuiTableFlags_SizingFixedFit --> default Column policy is ImGuiTableColumnFlags_WidthFixed, default Width is equal to contents width
// - with Table policy ImGuiTableFlags_SizingFixedSame --> default Column policy is ImGuiTableColumnFlags_WidthFixed, default Width is max of all contents width
// - with Table policy ImGuiTableFlags_SizingStretchSame --> default Column policy is ImGuiTableColumnFlags_WidthStretch, default Weight is 1.0f
// - with Table policy ImGuiTableFlags_SizingStretchWeight --> default Column policy is ImGuiTableColumnFlags_WidthStretch, default Weight is proportional to contents
// Default Width and default Weight can be overridden when calling TableSetupColumn().
//-----------------------------------------------------------------------------
// About mixing Fixed/Auto and Stretch columns together:
// - the typical use of mixing sizing policies is: any number of LEADING Fixed columns, followed by one or two TRAILING Stretch columns.
// - using mixed policies with ScrollX does not make much sense, as using Stretch columns with ScrollX does not make much sense in the first place!
// that is, unless 'inner_width' is passed to BeginTable() to explicitly provide a total width to layout columns in.
// - when using ImGuiTableFlags_SizingFixedSame with mixed columns, only the Fixed/Auto columns will match their widths to the width of the maximum contents.
// - when using ImGuiTableFlags_SizingStretchSame with mixed columns, only the Stretch columns will match their weight/widths.
//-----------------------------------------------------------------------------
// About using column width:
// If a column is manual resizable or has a width specified with TableSetupColumn():
// - you may use GetContentRegionAvail().x to query the width available in a given column.
// - right-side alignment features such as SetNextItemWidth(-x) or PushItemWidth(-x) will rely on this width.
// If the column is not resizable and has no width specified with TableSetupColumn():
// - its width will be automatic and be set to the max of items submitted.
// - therefore you generally cannot have ALL items of the columns use e.g. SetNextItemWidth(-FLT_MIN).
// - but if the column has one or more items of known/fixed size, this will become the reference width used by SetNextItemWidth(-FLT_MIN).
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// TABLES CLIPPING/CULLING
//-----------------------------------------------------------------------------
// About clipping/culling of Rows in Tables:
// - For large numbers of rows, it is recommended you use ImGuiListClipper to only submit visible rows.
// ImGuiListClipper is reliant on the fact that rows are of equal height.
// See 'Demo->Tables->Vertical Scrolling' or 'Demo->Tables->Advanced' for a demo of using the clipper.
// - Note that auto-resizing columns don't play well with using the clipper.
// By default a table with _ScrollX but without _Resizable will have column auto-resize.
// So, if you want to use the clipper, make sure to either enable _Resizable, either setup columns width explicitly with _WidthFixed.
//-----------------------------------------------------------------------------
// About clipping/culling of Columns in Tables:
// - Both TableSetColumnIndex() and TableNextColumn() return true when the column is visible or performing
// width measurements. Otherwise, you may skip submitting the contents of a cell/column, BUT ONLY if you know
// it is not going to contribute to row height.
// In many situations, you may skip submitting contents for every column but one (e.g. the first one).
// - Case A: column is not hidden by user, and at least partially in sight (most common case).
// - Case B: column is clipped / out of sight (because of scrolling or parent ClipRect): TableNextColumn() return false as a hint but we still allow layout output.
// - Case C: column is hidden explicitly by the user (e.g. via the context menu, or _DefaultHide column flag, etc.).
//
// [A] [B] [C]
// TableNextColumn(): true false false -> [userland] when TableNextColumn() / TableSetColumnIndex() return false, user can skip submitting items but only if the column doesn't contribute to row height.
// SkipItems: false false true -> [internal] when SkipItems is true, most widgets will early out if submitted, resulting is no layout output.
// ClipRect: normal zero-width zero-width -> [internal] when ClipRect is zero, ItemAdd() will return false and most widgets will early out mid-way.
// ImDrawList output: normal dummy dummy -> [internal] when using the dummy channel, ImDrawList submissions (if any) will be wasted (because cliprect is zero-width anyway).
//
// - We need to distinguish those cases because non-hidden columns that are clipped outside of scrolling bounds should still contribute their height to the row.
// However, in the majority of cases, the contribution to row height is the same for all columns, or the tallest cells are known by the programmer.
//-----------------------------------------------------------------------------
// About clipping/culling of whole Tables:
// - Scrolling tables with a known outer size can be clipped earlier as BeginTable() will return false.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// [SECTION] Header mess
//-----------------------------------------------------------------------------
#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
#define _CRT_SECURE_NO_WARNINGS
#endif
#include "imgui.h"
#ifndef IMGUI_DISABLE
#ifndef IMGUI_DEFINE_MATH_OPERATORS
#define IMGUI_DEFINE_MATH_OPERATORS
#endif
#include "imgui_internal.h"
// System includes
#if defined(_MSC_VER) && _MSC_VER <= 1500 // MSVC 2008 or earlier
#include <stddef.h> // intptr_t
#else
#include <stdint.h> // intptr_t
#endif
// Visual Studio warnings
#ifdef _MSC_VER
#pragma warning (disable: 4127) // condition expression is constant
#pragma warning (disable: 4996) // 'This function or variable may be unsafe': strcpy, strdup, sprintf, vsnprintf, sscanf, fopen
#if defined(_MSC_VER) && _MSC_VER >= 1922 // MSVC 2019 16.2 or later
#pragma warning (disable: 5054) // operator '|': deprecated between enumerations of different types
#endif
#pragma warning (disable: 26451) // [Static Analyzer] Arithmetic overflow : Using operator 'xxx' on a 4 byte value and then casting the result to a 8 byte value. Cast the value to the wider type before calling operator 'xxx' to avoid overflow(io.2).
#pragma warning (disable: 26812) // [Static Analyzer] The enum type 'xxx' is unscoped. Prefer 'enum class' over 'enum' (Enum.3).
#endif
// Clang/GCC warnings with -Weverything
#if defined(__clang__)
#if __has_warning("-Wunknown-warning-option")
#pragma clang diagnostic ignored "-Wunknown-warning-option" // warning: unknown warning group 'xxx' // not all warnings are known by all Clang versions and they tend to be rename-happy.. so ignoring warnings triggers new warnings on some configuration. Great!
#endif
#pragma clang diagnostic ignored "-Wunknown-pragmas" // warning: unknown warning group 'xxx'
#pragma clang diagnostic ignored "-Wold-style-cast" // warning: use of old-style cast // yes, they are more terse.
#pragma clang diagnostic ignored "-Wfloat-equal" // warning: comparing floating point with == or != is unsafe // storing and comparing against same constants (typically 0.0f) is ok.
#pragma clang diagnostic ignored "-Wformat-nonliteral" // warning: format string is not a string literal // passing non-literal to vsnformat(). yes, user passing incorrect format strings can crash the code.
#pragma clang diagnostic ignored "-Wsign-conversion" // warning: implicit conversion changes signedness
#pragma clang diagnostic ignored "-Wzero-as-null-pointer-constant" // warning: zero as null pointer constant // some standard header variations use #define NULL 0
#pragma clang diagnostic ignored "-Wdouble-promotion" // warning: implicit conversion from 'float' to 'double' when passing argument to function // using printf() is a misery with this as C++ va_arg ellipsis changes float to double.
#pragma clang diagnostic ignored "-Wenum-enum-conversion" // warning: bitwise operation between different enumeration types ('XXXFlags_' and 'XXXFlagsPrivate_')
#pragma clang diagnostic ignored "-Wdeprecated-enum-enum-conversion"// warning: bitwise operation between different enumeration types ('XXXFlags_' and 'XXXFlagsPrivate_') is deprecated
#pragma clang diagnostic ignored "-Wimplicit-int-float-conversion" // warning: implicit conversion from 'xxx' to 'float' may lose precision
#elif defined(__GNUC__)
#pragma GCC diagnostic ignored "-Wpragmas" // warning: unknown option after '#pragma GCC diagnostic' kind
#pragma GCC diagnostic ignored "-Wformat-nonliteral" // warning: format not a string literal, format string not checked
#pragma GCC diagnostic ignored "-Wclass-memaccess" // [__GNUC__ >= 8] warning: 'memset/memcpy' clearing/writing an object of type 'xxxx' with no trivial copy-assignment; use assignment or value-initialization instead
#endif
//-----------------------------------------------------------------------------
// [SECTION] Tables: Main code
//-----------------------------------------------------------------------------
// - TableFixFlags() [Internal]
// - TableFindByID() [Internal]
// - BeginTable()
// - BeginTableEx() [Internal]
// - TableBeginInitMemory() [Internal]
// - TableBeginApplyRequests() [Internal]
// - TableSetupColumnFlags() [Internal]
// - TableUpdateLayout() [Internal]
// - TableUpdateBorders() [Internal]
// - EndTable()
// - TableSetupColumn()
// - TableSetupScrollFreeze()
//-----------------------------------------------------------------------------
// Configuration
static const int TABLE_DRAW_CHANNEL_BG0 = 0;
static const int TABLE_DRAW_CHANNEL_BG2_FROZEN = 1;
static const int TABLE_DRAW_CHANNEL_NOCLIP = 2; // When using ImGuiTableFlags_NoClip (this becomes the last visible channel)
static const float TABLE_BORDER_SIZE = 1.0f; // FIXME-TABLE: Currently hard-coded because of clipping assumptions with outer borders rendering.
static const float TABLE_RESIZE_SEPARATOR_HALF_THICKNESS = 4.0f; // Extend outside inner borders.
static const float TABLE_RESIZE_SEPARATOR_FEEDBACK_TIMER = 0.06f; // Delay/timer before making the hover feedback (color+cursor) visible because tables/columns tends to be more cramped.
// Helper
inline ImGuiTableFlags TableFixFlags(ImGuiTableFlags flags, ImGuiWindow* outer_window)
{
// Adjust flags: set default sizing policy
if ((flags & ImGuiTableFlags_SizingMask_) == 0)
flags |= ((flags & ImGuiTableFlags_ScrollX) || (outer_window->Flags & ImGuiWindowFlags_AlwaysAutoResize)) ? ImGuiTableFlags_SizingFixedFit : ImGuiTableFlags_SizingStretchSame;
// Adjust flags: enable NoKeepColumnsVisible when using ImGuiTableFlags_SizingFixedSame
if ((flags & ImGuiTableFlags_SizingMask_) == ImGuiTableFlags_SizingFixedSame)
flags |= ImGuiTableFlags_NoKeepColumnsVisible;
// Adjust flags: enforce borders when resizable
if (flags & ImGuiTableFlags_Resizable)
flags |= ImGuiTableFlags_BordersInnerV;
// Adjust flags: disable NoHostExtendX/NoHostExtendY if we have any scrolling going on
if (flags & (ImGuiTableFlags_ScrollX | ImGuiTableFlags_ScrollY))
flags &= ~(ImGuiTableFlags_NoHostExtendX | ImGuiTableFlags_NoHostExtendY);
// Adjust flags: NoBordersInBodyUntilResize takes priority over NoBordersInBody
if (flags & ImGuiTableFlags_NoBordersInBodyUntilResize)
flags &= ~ImGuiTableFlags_NoBordersInBody;
// Adjust flags: disable saved settings if there's nothing to save
if ((flags & (ImGuiTableFlags_Resizable | ImGuiTableFlags_Hideable | ImGuiTableFlags_Reorderable | ImGuiTableFlags_Sortable)) == 0)
flags |= ImGuiTableFlags_NoSavedSettings;
// Inherit _NoSavedSettings from top-level window (child windows always have _NoSavedSettings set)
#ifdef IMGUI_HAS_DOCK
ImGuiWindow* window_for_settings = outer_window->RootWindowDockStop;
#else
ImGuiWindow* window_for_settings = outer_window->RootWindow;
#endif
if (window_for_settings->Flags & ImGuiWindowFlags_NoSavedSettings)
flags |= ImGuiTableFlags_NoSavedSettings;
return flags;
}
ImGuiTable* ImGui::TableFindByID(ImGuiID id)
{
ImGuiContext& g = *GImGui;
return g.Tables.GetByKey(id);
}
// Read about "TABLE SIZING" at the top of this file.
bool ImGui::BeginTable(const char* str_id, int columns_count, ImGuiTableFlags flags, const ImVec2& outer_size, float inner_width)
{
ImGuiID id = GetID(str_id);
return BeginTableEx(str_id, id, columns_count, flags, outer_size, inner_width);
}
bool ImGui::BeginTableEx(const char* name, ImGuiID id, int columns_count, ImGuiTableFlags flags, const ImVec2& outer_size, float inner_width)
{
ImGuiContext& g = *GImGui;
ImGuiWindow* outer_window = GetCurrentWindow();
if (outer_window->SkipItems) // Consistent with other tables + beneficial side effect that assert on miscalling EndTable() will be more visible.
return false;
// Sanity checks
IM_ASSERT(columns_count > 0 && columns_count <= IMGUI_TABLE_MAX_COLUMNS && "Only 1..64 columns allowed!");
if (flags & ImGuiTableFlags_ScrollX)
IM_ASSERT(inner_width >= 0.0f);
// If an outer size is specified ahead we will be able to early out when not visible. Exact clipping rules may evolve.
const bool use_child_window = (flags & (ImGuiTableFlags_ScrollX | ImGuiTableFlags_ScrollY)) != 0;
const ImVec2 avail_size = GetContentRegionAvail();
ImVec2 actual_outer_size = CalcItemSize(outer_size, ImMax(avail_size.x, 1.0f), use_child_window ? ImMax(avail_size.y, 1.0f) : 0.0f);
ImRect outer_rect(outer_window->DC.CursorPos, outer_window->DC.CursorPos + actual_outer_size);
if (use_child_window && IsClippedEx(outer_rect, 0, false))
{
ItemSize(outer_rect);
return false;
}
// Acquire storage for the table
ImGuiTable* table = g.Tables.GetOrAddByKey(id);
const int instance_no = (table->LastFrameActive != g.FrameCount) ? 0 : table->InstanceCurrent + 1;
const ImGuiID instance_id = id + instance_no;
const ImGuiTableFlags table_last_flags = table->Flags;
if (instance_no > 0)
IM_ASSERT(table->ColumnsCount == columns_count && "BeginTable(): Cannot change columns count mid-frame while preserving same ID");
// Acquire temporary buffers
const int table_idx = g.Tables.GetIndex(table);
g.CurrentTableStackIdx++;
if (g.CurrentTableStackIdx + 1 > g.TablesTempDataStack.Size)
g.TablesTempDataStack.resize(g.CurrentTableStackIdx + 1, ImGuiTableTempData());
ImGuiTableTempData* temp_data = table->TempData = &g.TablesTempDataStack[g.CurrentTableStackIdx];
temp_data->TableIndex = table_idx;
table->DrawSplitter = &table->TempData->DrawSplitter;
table->DrawSplitter->Clear();
// Fix flags
table->IsDefaultSizingPolicy = (flags & ImGuiTableFlags_SizingMask_) == 0;
flags = TableFixFlags(flags, outer_window);
// Initialize
table->ID = id;
table->Flags = flags;
table->InstanceCurrent = (ImS16)instance_no;
table->LastFrameActive = g.FrameCount;
table->OuterWindow = table->InnerWindow = outer_window;
table->ColumnsCount = columns_count;
table->IsLayoutLocked = false;
table->InnerWidth = inner_width;
temp_data->UserOuterSize = outer_size;
// When not using a child window, WorkRect.Max will grow as we append contents.
if (use_child_window)
{
// Ensure no vertical scrollbar appears if we only want horizontal one, to make flag consistent
// (we have no other way to disable vertical scrollbar of a window while keeping the horizontal one showing)
ImVec2 override_content_size(FLT_MAX, FLT_MAX);
if ((flags & ImGuiTableFlags_ScrollX) && !(flags & ImGuiTableFlags_ScrollY))
override_content_size.y = FLT_MIN;
// Ensure specified width (when not specified, Stretched columns will act as if the width == OuterWidth and
// never lead to any scrolling). We don't handle inner_width < 0.0f, we could potentially use it to right-align
// based on the right side of the child window work rect, which would require knowing ahead if we are going to
// have decoration taking horizontal spaces (typically a vertical scrollbar).
if ((flags & ImGuiTableFlags_ScrollX) && inner_width > 0.0f)
override_content_size.x = inner_width;
if (override_content_size.x != FLT_MAX || override_content_size.y != FLT_MAX)
SetNextWindowContentSize(ImVec2(override_content_size.x != FLT_MAX ? override_content_size.x : 0.0f, override_content_size.y != FLT_MAX ? override_content_size.y : 0.0f));
// Reset scroll if we are reactivating it
if ((table_last_flags & (ImGuiTableFlags_ScrollX | ImGuiTableFlags_ScrollY)) == 0)
SetNextWindowScroll(ImVec2(0.0f, 0.0f));
// Create scrolling region (without border and zero window padding)
ImGuiWindowFlags child_flags = (flags & ImGuiTableFlags_ScrollX) ? ImGuiWindowFlags_HorizontalScrollbar : ImGuiWindowFlags_None;
BeginChildEx(name, instance_id, outer_rect.GetSize(), false, child_flags);
table->InnerWindow = g.CurrentWindow;
table->WorkRect = table->InnerWindow->WorkRect;
table->OuterRect = table->InnerWindow->Rect();
table->InnerRect = table->InnerWindow->InnerRect;
IM_ASSERT(table->InnerWindow->WindowPadding.x == 0.0f && table->InnerWindow->WindowPadding.y == 0.0f && table->InnerWindow->WindowBorderSize == 0.0f);
}
else
{
// For non-scrolling tables, WorkRect == OuterRect == InnerRect.
// But at this point we do NOT have a correct value for .Max.y (unless a height has been explicitly passed in). It will only be updated in EndTable().
table->WorkRect = table->OuterRect = table->InnerRect = outer_rect;
}
// Push a standardized ID for both child-using and not-child-using tables
PushOverrideID(instance_id);
// Backup a copy of host window members we will modify
ImGuiWindow* inner_window = table->InnerWindow;
table->HostIndentX = inner_window->DC.Indent.x;
table->HostClipRect = inner_window->ClipRect;
table->HostSkipItems = inner_window->SkipItems;
temp_data->HostBackupWorkRect = inner_window->WorkRect;
temp_data->HostBackupParentWorkRect = inner_window->ParentWorkRect;
temp_data->HostBackupColumnsOffset = outer_window->DC.ColumnsOffset;
temp_data->HostBackupPrevLineSize = inner_window->DC.PrevLineSize;
temp_data->HostBackupCurrLineSize = inner_window->DC.CurrLineSize;
temp_data->HostBackupCursorMaxPos = inner_window->DC.CursorMaxPos;
temp_data->HostBackupItemWidth = outer_window->DC.ItemWidth;
temp_data->HostBackupItemWidthStackSize = outer_window->DC.ItemWidthStack.Size;
inner_window->DC.PrevLineSize = inner_window->DC.CurrLineSize = ImVec2(0.0f, 0.0f);
// Padding and Spacing
// - None ........Content..... Pad .....Content........
// - PadOuter | Pad ..Content..... Pad .....Content.. Pad |
// - PadInner ........Content.. Pad | Pad ..Content........
// - PadOuter+PadInner | Pad ..Content.. Pad | Pad ..Content.. Pad |
const bool pad_outer_x = (flags & ImGuiTableFlags_NoPadOuterX) ? false : (flags & ImGuiTableFlags_PadOuterX) ? true : (flags & ImGuiTableFlags_BordersOuterV) != 0;
const bool pad_inner_x = (flags & ImGuiTableFlags_NoPadInnerX) ? false : true;
const float inner_spacing_for_border = (flags & ImGuiTableFlags_BordersInnerV) ? TABLE_BORDER_SIZE : 0.0f;
const float inner_spacing_explicit = (pad_inner_x && (flags & ImGuiTableFlags_BordersInnerV) == 0) ? g.Style.CellPadding.x : 0.0f;
const float inner_padding_explicit = (pad_inner_x && (flags & ImGuiTableFlags_BordersInnerV) != 0) ? g.Style.CellPadding.x : 0.0f;
table->CellSpacingX1 = inner_spacing_explicit + inner_spacing_for_border;
table->CellSpacingX2 = inner_spacing_explicit;
table->CellPaddingX = inner_padding_explicit;
table->CellPaddingY = g.Style.CellPadding.y;
const float outer_padding_for_border = (flags & ImGuiTableFlags_BordersOuterV) ? TABLE_BORDER_SIZE : 0.0f;
const float outer_padding_explicit = pad_outer_x ? g.Style.CellPadding.x : 0.0f;
table->OuterPaddingX = (outer_padding_for_border + outer_padding_explicit) - table->CellPaddingX;
table->CurrentColumn = -1;
table->CurrentRow = -1;
table->RowBgColorCounter = 0;
table->LastRowFlags = ImGuiTableRowFlags_None;
table->InnerClipRect = (inner_window == outer_window) ? table->WorkRect : inner_window->ClipRect;
table->InnerClipRect.ClipWith(table->WorkRect); // We need this to honor inner_width
table->InnerClipRect.ClipWithFull(table->HostClipRect);
table->InnerClipRect.Max.y = (flags & ImGuiTableFlags_NoHostExtendY) ? ImMin(table->InnerClipRect.Max.y, inner_window->WorkRect.Max.y) : inner_window->ClipRect.Max.y;
table->RowPosY1 = table->RowPosY2 = table->WorkRect.Min.y; // This is needed somehow
table->RowTextBaseline = 0.0f; // This will be cleared again by TableBeginRow()
table->FreezeRowsRequest = table->FreezeRowsCount = 0; // This will be setup by TableSetupScrollFreeze(), if any
table->FreezeColumnsRequest = table->FreezeColumnsCount = 0;
table->IsUnfrozenRows = true;
table->DeclColumnsCount = 0;
// Using opaque colors facilitate overlapping elements of the grid
table->BorderColorStrong = GetColorU32(ImGuiCol_TableBorderStrong);
table->BorderColorLight = GetColorU32(ImGuiCol_TableBorderLight);
// Make table current
g.CurrentTable = table;
outer_window->DC.CurrentTableIdx = table_idx;
if (inner_window != outer_window) // So EndChild() within the inner window can restore the table properly.
inner_window->DC.CurrentTableIdx = table_idx;
if ((table_last_flags & ImGuiTableFlags_Reorderable) && (flags & ImGuiTableFlags_Reorderable) == 0)
table->IsResetDisplayOrderRequest = true;
// Mark as used
if (table_idx >= g.TablesLastTimeActive.Size)
g.TablesLastTimeActive.resize(table_idx + 1, -1.0f);
g.TablesLastTimeActive[table_idx] = (float)g.Time;
temp_data->LastTimeActive = (float)g.Time;
table->MemoryCompacted = false;
// Setup memory buffer (clear data if columns count changed)
ImGuiTableColumn* old_columns_to_preserve = NULL;
void* old_columns_raw_data = NULL;
const int old_columns_count = table->Columns.size();
if (old_columns_count != 0 && old_columns_count != columns_count)
{
// Attempt to preserve width on column count change (#4046)
old_columns_to_preserve = table->Columns.Data;
old_columns_raw_data = table->RawData;
table->RawData = NULL;
}
if (table->RawData == NULL)
{
TableBeginInitMemory(table, columns_count);
table->IsInitializing = table->IsSettingsRequestLoad = true;
}
if (table->IsResetAllRequest)
TableResetSettings(table);
if (table->IsInitializing)
{
// Initialize
table->SettingsOffset = -1;
table->IsSortSpecsDirty = true;
table->InstanceInteracted = -1;
table->ContextPopupColumn = -1;
table->ReorderColumn = table->ResizedColumn = table->LastResizedColumn = -1;
table->AutoFitSingleColumn = -1;
table->HoveredColumnBody = table->HoveredColumnBorder = -1;
for (int n = 0; n < columns_count; n++)
{
ImGuiTableColumn* column = &table->Columns[n];
if (old_columns_to_preserve && n < old_columns_count)
{
// FIXME: We don't attempt to preserve column order in this path.
*column = old_columns_to_preserve[n];
}
else
{
float width_auto = column->WidthAuto;
*column = ImGuiTableColumn();
column->WidthAuto = width_auto;
column->IsPreserveWidthAuto = true; // Preserve WidthAuto when reinitializing a live table: not technically necessary but remove a visible flicker
column->IsEnabled = column->IsUserEnabled = column->IsUserEnabledNextFrame = true;
}
column->DisplayOrder = table->DisplayOrderToIndex[n] = (ImGuiTableColumnIdx)n;
}
}
if (old_columns_raw_data)
IM_FREE(old_columns_raw_data);
// Load settings
if (table->IsSettingsRequestLoad)
TableLoadSettings(table);
// Handle DPI/font resize
// This is designed to facilitate DPI changes with the assumption that e.g. style.CellPadding has been scaled as well.
// It will also react to changing fonts with mixed results. It doesn't need to be perfect but merely provide a decent transition.
// FIXME-DPI: Provide consistent standards for reference size. Perhaps using g.CurrentDpiScale would be more self explanatory.
// This is will lead us to non-rounded WidthRequest in columns, which should work but is a poorly tested path.
const float new_ref_scale_unit = g.FontSize; // g.Font->GetCharAdvance('A') ?
if (table->RefScale != 0.0f && table->RefScale != new_ref_scale_unit)
{
const float scale_factor = new_ref_scale_unit / table->RefScale;
//IMGUI_DEBUG_LOG("[table] %08X RefScaleUnit %.3f -> %.3f, scaling width by %.3f\n", table->ID, table->RefScaleUnit, new_ref_scale_unit, scale_factor);
for (int n = 0; n < columns_count; n++)
table->Columns[n].WidthRequest = table->Columns[n].WidthRequest * scale_factor;
}
table->RefScale = new_ref_scale_unit;
// Disable output until user calls TableNextRow() or TableNextColumn() leading to the TableUpdateLayout() call..
// This is not strictly necessary but will reduce cases were "out of table" output will be misleading to the user.
// Because we cannot safely assert in EndTable() when no rows have been created, this seems like our best option.
inner_window->SkipItems = true;
// Clear names
// At this point the ->NameOffset field of each column will be invalid until TableUpdateLayout() or the first call to TableSetupColumn()
if (table->ColumnsNames.Buf.Size > 0)
table->ColumnsNames.Buf.resize(0);
// Apply queued resizing/reordering/hiding requests
TableBeginApplyRequests(table);
return true;
}
// For reference, the average total _allocation count_ for a table is:
// + 0 (for ImGuiTable instance, we are pooling allocations in g.Tables)
// + 1 (for table->RawData allocated below)
// + 1 (for table->ColumnsNames, if names are used)
// + 1 (for table->Splitter._Channels)
// + 2 * active_channels_count (for ImDrawCmd and ImDrawIdx buffers inside channels)
// Where active_channels_count is variable but often == columns_count or columns_count + 1, see TableSetupDrawChannels() for details.
// Unused channels don't perform their +2 allocations.
void ImGui::TableBeginInitMemory(ImGuiTable* table, int columns_count)
{
// Allocate single buffer for our arrays
ImSpanAllocator<3> span_allocator;
span_allocator.Reserve(0, columns_count * sizeof(ImGuiTableColumn));
span_allocator.Reserve(1, columns_count * sizeof(ImGuiTableColumnIdx));
span_allocator.Reserve(2, columns_count * sizeof(ImGuiTableCellData), 4);
table->RawData = IM_ALLOC(span_allocator.GetArenaSizeInBytes());
memset(table->RawData, 0, span_allocator.GetArenaSizeInBytes());
span_allocator.SetArenaBasePtr(table->RawData);
span_allocator.GetSpan(0, &table->Columns);
span_allocator.GetSpan(1, &table->DisplayOrderToIndex);
span_allocator.GetSpan(2, &table->RowCellData);
}
// Apply queued resizing/reordering/hiding requests
void ImGui::TableBeginApplyRequests(ImGuiTable* table)
{
// Handle resizing request
// (We process this at the first TableBegin of the frame)
// FIXME-TABLE: Contains columns if our work area doesn't allow for scrolling?
if (table->InstanceCurrent == 0)
{
if (table->ResizedColumn != -1 && table->ResizedColumnNextWidth != FLT_MAX)
TableSetColumnWidth(table->ResizedColumn, table->ResizedColumnNextWidth);
table->LastResizedColumn = table->ResizedColumn;
table->ResizedColumnNextWidth = FLT_MAX;
table->ResizedColumn = -1;
// Process auto-fit for single column, which is a special case for stretch columns and fixed columns with FixedSame policy.
// FIXME-TABLE: Would be nice to redistribute available stretch space accordingly to other weights, instead of giving it all to siblings.
if (table->AutoFitSingleColumn != -1)
{
TableSetColumnWidth(table->AutoFitSingleColumn, table->Columns[table->AutoFitSingleColumn].WidthAuto);
table->AutoFitSingleColumn = -1;
}
}
// Handle reordering request
// Note: we don't clear ReorderColumn after handling the request.
if (table->InstanceCurrent == 0)
{
if (table->HeldHeaderColumn == -1 && table->ReorderColumn != -1)
table->ReorderColumn = -1;
table->HeldHeaderColumn = -1;
if (table->ReorderColumn != -1 && table->ReorderColumnDir != 0)
{
// We need to handle reordering across hidden columns.
// In the configuration below, moving C to the right of E will lead to:
// ... C [D] E ---> ... [D] E C (Column name/index)
// ... 2 3 4 ... 2 3 4 (Display order)
const int reorder_dir = table->ReorderColumnDir;
IM_ASSERT(reorder_dir == -1 || reorder_dir == +1);
IM_ASSERT(table->Flags & ImGuiTableFlags_Reorderable);
ImGuiTableColumn* src_column = &table->Columns[table->ReorderColumn];
ImGuiTableColumn* dst_column = &table->Columns[(reorder_dir == -1) ? src_column->PrevEnabledColumn : src_column->NextEnabledColumn];
IM_UNUSED(dst_column);
const int src_order = src_column->DisplayOrder;
const int dst_order = dst_column->DisplayOrder;
src_column->DisplayOrder = (ImGuiTableColumnIdx)dst_order;
for (int order_n = src_order + reorder_dir; order_n != dst_order + reorder_dir; order_n += reorder_dir)
table->Columns[table->DisplayOrderToIndex[order_n]].DisplayOrder -= (ImGuiTableColumnIdx)reorder_dir;
IM_ASSERT(dst_column->DisplayOrder == dst_order - reorder_dir);
// Display order is stored in both columns->IndexDisplayOrder and table->DisplayOrder[],
// rebuild the later from the former.
for (int column_n = 0; column_n < table->ColumnsCount; column_n++)
table->DisplayOrderToIndex[table->Columns[column_n].DisplayOrder] = (ImGuiTableColumnIdx)column_n;
table->ReorderColumnDir = 0;
table->IsSettingsDirty = true;
}
}
// Handle display order reset request
if (table->IsResetDisplayOrderRequest)
{
for (int n = 0; n < table->ColumnsCount; n++)
table->DisplayOrderToIndex[n] = table->Columns[n].DisplayOrder = (ImGuiTableColumnIdx)n;
table->IsResetDisplayOrderRequest = false;
table->IsSettingsDirty = true;
}
}
// Adjust flags: default width mode + stretch columns are not allowed when auto extending
static void TableSetupColumnFlags(ImGuiTable* table, ImGuiTableColumn* column, ImGuiTableColumnFlags flags_in)
{
ImGuiTableColumnFlags flags = flags_in;
// Sizing Policy
if ((flags & ImGuiTableColumnFlags_WidthMask_) == 0)
{
const ImGuiTableFlags table_sizing_policy = (table->Flags & ImGuiTableFlags_SizingMask_);
if (table_sizing_policy == ImGuiTableFlags_SizingFixedFit || table_sizing_policy == ImGuiTableFlags_SizingFixedSame)
flags |= ImGuiTableColumnFlags_WidthFixed;
else
flags |= ImGuiTableColumnFlags_WidthStretch;
}
else
{
IM_ASSERT(ImIsPowerOfTwo(flags & ImGuiTableColumnFlags_WidthMask_)); // Check that only 1 of each set is used.
}
// Resize
if ((table->Flags & ImGuiTableFlags_Resizable) == 0)
flags |= ImGuiTableColumnFlags_NoResize;
// Sorting
if ((flags & ImGuiTableColumnFlags_NoSortAscending) && (flags & ImGuiTableColumnFlags_NoSortDescending))
flags |= ImGuiTableColumnFlags_NoSort;
// Indentation
if ((flags & ImGuiTableColumnFlags_IndentMask_) == 0)
flags |= (table->Columns.index_from_ptr(column) == 0) ? ImGuiTableColumnFlags_IndentEnable : ImGuiTableColumnFlags_IndentDisable;
// Alignment
//if ((flags & ImGuiTableColumnFlags_AlignMask_) == 0)
// flags |= ImGuiTableColumnFlags_AlignCenter;
//IM_ASSERT(ImIsPowerOfTwo(flags & ImGuiTableColumnFlags_AlignMask_)); // Check that only 1 of each set is used.
// Preserve status flags
column->Flags = flags | (column->Flags & ImGuiTableColumnFlags_StatusMask_);
// Build an ordered list of available sort directions
column->SortDirectionsAvailCount = column->SortDirectionsAvailMask = column->SortDirectionsAvailList = 0;
if (table->Flags & ImGuiTableFlags_Sortable)
{
int count = 0, mask = 0, list = 0;
if ((flags & ImGuiTableColumnFlags_PreferSortAscending) != 0 && (flags & ImGuiTableColumnFlags_NoSortAscending) == 0) { mask |= 1 << ImGuiSortDirection_Ascending; list |= ImGuiSortDirection_Ascending << (count << 1); count++; }
if ((flags & ImGuiTableColumnFlags_PreferSortDescending) != 0 && (flags & ImGuiTableColumnFlags_NoSortDescending) == 0) { mask |= 1 << ImGuiSortDirection_Descending; list |= ImGuiSortDirection_Descending << (count << 1); count++; }
if ((flags & ImGuiTableColumnFlags_PreferSortAscending) == 0 && (flags & ImGuiTableColumnFlags_NoSortAscending) == 0) { mask |= 1 << ImGuiSortDirection_Ascending; list |= ImGuiSortDirection_Ascending << (count << 1); count++; }
if ((flags & ImGuiTableColumnFlags_PreferSortDescending) == 0 && (flags & ImGuiTableColumnFlags_NoSortDescending) == 0) { mask |= 1 << ImGuiSortDirection_Descending; list |= ImGuiSortDirection_Descending << (count << 1); count++; }
if ((table->Flags & ImGuiTableFlags_SortTristate) || count == 0) { mask |= 1 << ImGuiSortDirection_None; count++; }
column->SortDirectionsAvailList = (ImU8)list;
column->SortDirectionsAvailMask = (ImU8)mask;
column->SortDirectionsAvailCount = (ImU8)count;
ImGui::TableFixColumnSortDirection(table, column);
}
}
// Layout columns for the frame. This is in essence the followup to BeginTable().
// Runs on the first call to TableNextRow(), to give a chance for TableSetupColumn() to be called first.
// FIXME-TABLE: Our width (and therefore our WorkRect) will be minimal in the first frame for _WidthAuto columns.
// Increase feedback side-effect with widgets relying on WorkRect.Max.x... Maybe provide a default distribution for _WidthAuto columns?
void ImGui::TableUpdateLayout(ImGuiTable* table)
{
ImGuiContext& g = *GImGui;
IM_ASSERT(table->IsLayoutLocked == false);
const ImGuiTableFlags table_sizing_policy = (table->Flags & ImGuiTableFlags_SizingMask_);
table->IsDefaultDisplayOrder = true;
table->ColumnsEnabledCount = 0;
table->EnabledMaskByIndex = 0x00;
table->EnabledMaskByDisplayOrder = 0x00;
table->LeftMostEnabledColumn = -1;
table->MinColumnWidth = ImMax(1.0f, g.Style.FramePadding.x * 1.0f); // g.Style.ColumnsMinSpacing; // FIXME-TABLE
// [Part 1] Apply/lock Enabled and Order states. Calculate auto/ideal width for columns. Count fixed/stretch columns.
// Process columns in their visible orders as we are building the Prev/Next indices.
int count_fixed = 0; // Number of columns that have fixed sizing policies
int count_stretch = 0; // Number of columns that have stretch sizing policies
int prev_visible_column_idx = -1;
bool has_auto_fit_request = false;
bool has_resizable = false;
float stretch_sum_width_auto = 0.0f;
float fixed_max_width_auto = 0.0f;
for (int order_n = 0; order_n < table->ColumnsCount; order_n++)
{
const int column_n = table->DisplayOrderToIndex[order_n];
if (column_n != order_n)
table->IsDefaultDisplayOrder = false;
ImGuiTableColumn* column = &table->Columns[column_n];
// Clear column setup if not submitted by user. Currently we make it mandatory to call TableSetupColumn() every frame.
// It would easily work without but we're not ready to guarantee it since e.g. names need resubmission anyway.
// We take a slight shortcut but in theory we could be calling TableSetupColumn() here with dummy values, it should yield the same effect.
if (table->DeclColumnsCount <= column_n)
{
TableSetupColumnFlags(table, column, ImGuiTableColumnFlags_None);
column->NameOffset = -1;
column->UserID = 0;
column->InitStretchWeightOrWidth = -1.0f;
}
// Update Enabled state, mark settings and sort specs dirty
if (!(table->Flags & ImGuiTableFlags_Hideable) || (column->Flags & ImGuiTableColumnFlags_NoHide))
column->IsUserEnabledNextFrame = true;
if (column->IsUserEnabled != column->IsUserEnabledNextFrame)
{
column->IsUserEnabled = column->IsUserEnabledNextFrame;
table->IsSettingsDirty = true;
}
column->IsEnabled = column->IsUserEnabled && (column->Flags & ImGuiTableColumnFlags_Disabled) == 0;
if (column->SortOrder != -1 && !column->IsEnabled)
table->IsSortSpecsDirty = true;
if (column->SortOrder > 0 && !(table->Flags & ImGuiTableFlags_SortMulti))
table->IsSortSpecsDirty = true;
// Auto-fit unsized columns
const bool start_auto_fit = (column->Flags & ImGuiTableColumnFlags_WidthFixed) ? (column->WidthRequest < 0.0f) : (column->StretchWeight < 0.0f);
if (start_auto_fit)
column->AutoFitQueue = column->CannotSkipItemsQueue = (1 << 3) - 1; // Fit for three frames
if (!column->IsEnabled)
{
column->IndexWithinEnabledSet = -1;
continue;
}
// Mark as enabled and link to previous/next enabled column
column->PrevEnabledColumn = (ImGuiTableColumnIdx)prev_visible_column_idx;
column->NextEnabledColumn = -1;
if (prev_visible_column_idx != -1)
table->Columns[prev_visible_column_idx].NextEnabledColumn = (ImGuiTableColumnIdx)column_n;
else
table->LeftMostEnabledColumn = (ImGuiTableColumnIdx)column_n;
column->IndexWithinEnabledSet = table->ColumnsEnabledCount++;
table->EnabledMaskByIndex |= (ImU64)1 << column_n;
table->EnabledMaskByDisplayOrder |= (ImU64)1 << column->DisplayOrder;
prev_visible_column_idx = column_n;
IM_ASSERT(column->IndexWithinEnabledSet <= column->DisplayOrder);
// Calculate ideal/auto column width (that's the width required for all contents to be visible without clipping)
// Combine width from regular rows + width from headers unless requested not to.
if (!column->IsPreserveWidthAuto)
column->WidthAuto = TableGetColumnWidthAuto(table, column);
// Non-resizable columns keep their requested width (apply user value regardless of IsPreserveWidthAuto)
const bool column_is_resizable = (column->Flags & ImGuiTableColumnFlags_NoResize) == 0;
if (column_is_resizable)
has_resizable = true;
if ((column->Flags & ImGuiTableColumnFlags_WidthFixed) && column->InitStretchWeightOrWidth > 0.0f && !column_is_resizable)
column->WidthAuto = column->InitStretchWeightOrWidth;
if (column->AutoFitQueue != 0x00)
has_auto_fit_request = true;
if (column->Flags & ImGuiTableColumnFlags_WidthStretch)
{
stretch_sum_width_auto += column->WidthAuto;
count_stretch++;
}
else
{
fixed_max_width_auto = ImMax(fixed_max_width_auto, column->WidthAuto);
count_fixed++;
}
}
if ((table->Flags & ImGuiTableFlags_Sortable) && table->SortSpecsCount == 0 && !(table->Flags & ImGuiTableFlags_SortTristate))
table->IsSortSpecsDirty = true;
table->RightMostEnabledColumn = (ImGuiTableColumnIdx)prev_visible_column_idx;
IM_ASSERT(table->LeftMostEnabledColumn >= 0 && table->RightMostEnabledColumn >= 0);
// [Part 2] Disable child window clipping while fitting columns. This is not strictly necessary but makes it possible
// to avoid the column fitting having to wait until the first visible frame of the child container (may or not be a good thing).
// FIXME-TABLE: for always auto-resizing columns may not want to do that all the time.
if (has_auto_fit_request && table->OuterWindow != table->InnerWindow)
table->InnerWindow->SkipItems = false;
if (has_auto_fit_request)
table->IsSettingsDirty = true;
// [Part 3] Fix column flags and record a few extra information.
float sum_width_requests = 0.0f; // Sum of all width for fixed and auto-resize columns, excluding width contributed by Stretch columns but including spacing/padding.
float stretch_sum_weights = 0.0f; // Sum of all weights for stretch columns.
table->LeftMostStretchedColumn = table->RightMostStretchedColumn = -1;
for (int column_n = 0; column_n < table->ColumnsCount; column_n++)
{
if (!(table->EnabledMaskByIndex & ((ImU64)1 << column_n)))
continue;
ImGuiTableColumn* column = &table->Columns[column_n];
const bool column_is_resizable = (column->Flags & ImGuiTableColumnFlags_NoResize) == 0;
if (column->Flags & ImGuiTableColumnFlags_WidthFixed)
{
// Apply same widths policy
float width_auto = column->WidthAuto;
if (table_sizing_policy == ImGuiTableFlags_SizingFixedSame && (column->AutoFitQueue != 0x00 || !column_is_resizable))
width_auto = fixed_max_width_auto;
// Apply automatic width
// Latch initial size for fixed columns and update it constantly for auto-resizing column (unless clipped!)
if (column->AutoFitQueue != 0x00)
column->WidthRequest = width_auto;
else if ((column->Flags & ImGuiTableColumnFlags_WidthFixed) && !column_is_resizable && (table->RequestOutputMaskByIndex & ((ImU64)1 << column_n)))
column->WidthRequest = width_auto;
// FIXME-TABLE: Increase minimum size during init frame to avoid biasing auto-fitting widgets
// (e.g. TextWrapped) too much. Otherwise what tends to happen is that TextWrapped would output a very
// large height (= first frame scrollbar display very off + clipper would skip lots of items).
// This is merely making the side-effect less extreme, but doesn't properly fixes it.
// FIXME: Move this to ->WidthGiven to avoid temporary lossyless?
// FIXME: This break IsPreserveWidthAuto from not flickering if the stored WidthAuto was smaller.
if (column->AutoFitQueue > 0x01 && table->IsInitializing && !column->IsPreserveWidthAuto)
column->WidthRequest = ImMax(column->WidthRequest, table->MinColumnWidth * 4.0f); // FIXME-TABLE: Another constant/scale?
sum_width_requests += column->WidthRequest;
}
else
{
// Initialize stretch weight
if (column->AutoFitQueue != 0x00 || column->StretchWeight < 0.0f || !column_is_resizable)
{
if (column->InitStretchWeightOrWidth > 0.0f)
column->StretchWeight = column->InitStretchWeightOrWidth;
else if (table_sizing_policy == ImGuiTableFlags_SizingStretchProp)
column->StretchWeight = (column->WidthAuto / stretch_sum_width_auto) * count_stretch;
else
column->StretchWeight = 1.0f;
}
stretch_sum_weights += column->StretchWeight;
if (table->LeftMostStretchedColumn == -1 || table->Columns[table->LeftMostStretchedColumn].DisplayOrder > column->DisplayOrder)
table->LeftMostStretchedColumn = (ImGuiTableColumnIdx)column_n;
if (table->RightMostStretchedColumn == -1 || table->Columns[table->RightMostStretchedColumn].DisplayOrder < column->DisplayOrder)
table->RightMostStretchedColumn = (ImGuiTableColumnIdx)column_n;
}
column->IsPreserveWidthAuto = false;
sum_width_requests += table->CellPaddingX * 2.0f;
}
table->ColumnsEnabledFixedCount = (ImGuiTableColumnIdx)count_fixed;
// [Part 4] Apply final widths based on requested widths
const ImRect work_rect = table->WorkRect;
const float width_spacings = (table->OuterPaddingX * 2.0f) + (table->CellSpacingX1 + table->CellSpacingX2) * (table->ColumnsEnabledCount - 1);
const float width_avail = ((table->Flags & ImGuiTableFlags_ScrollX) && table->InnerWidth == 0.0f) ? table->InnerClipRect.GetWidth() : work_rect.GetWidth();
const float width_avail_for_stretched_columns = width_avail - width_spacings - sum_width_requests;
float width_remaining_for_stretched_columns = width_avail_for_stretched_columns;
table->ColumnsGivenWidth = width_spacings + (table->CellPaddingX * 2.0f) * table->ColumnsEnabledCount;
for (int column_n = 0; column_n < table->ColumnsCount; column_n++)
{
if (!(table->EnabledMaskByIndex & ((ImU64)1 << column_n)))
continue;
ImGuiTableColumn* column = &table->Columns[column_n];
// Allocate width for stretched/weighted columns (StretchWeight gets converted into WidthRequest)
if (column->Flags & ImGuiTableColumnFlags_WidthStretch)
{
float weight_ratio = column->StretchWeight / stretch_sum_weights;
column->WidthRequest = IM_FLOOR(ImMax(width_avail_for_stretched_columns * weight_ratio, table->MinColumnWidth) + 0.01f);
width_remaining_for_stretched_columns -= column->WidthRequest;
}
// [Resize Rule 1] The right-most Visible column is not resizable if there is at least one Stretch column
// See additional comments in TableSetColumnWidth().
if (column->NextEnabledColumn == -1 && table->LeftMostStretchedColumn != -1)
column->Flags |= ImGuiTableColumnFlags_NoDirectResize_;
// Assign final width, record width in case we will need to shrink
column->WidthGiven = ImFloor(ImMax(column->WidthRequest, table->MinColumnWidth));
table->ColumnsGivenWidth += column->WidthGiven;
}
// [Part 5] Redistribute stretch remainder width due to rounding (remainder width is < 1.0f * number of Stretch column).
// Using right-to-left distribution (more likely to match resizing cursor).
if (width_remaining_for_stretched_columns >= 1.0f && !(table->Flags & ImGuiTableFlags_PreciseWidths))
for (int order_n = table->ColumnsCount - 1; stretch_sum_weights > 0.0f && width_remaining_for_stretched_columns >= 1.0f && order_n >= 0; order_n--)
{
if (!(table->EnabledMaskByDisplayOrder & ((ImU64)1 << order_n)))
continue;
ImGuiTableColumn* column = &table->Columns[table->DisplayOrderToIndex[order_n]];
if (!(column->Flags & ImGuiTableColumnFlags_WidthStretch))
continue;
column->WidthRequest += 1.0f;
column->WidthGiven += 1.0f;
width_remaining_for_stretched_columns -= 1.0f;
}
table->HoveredColumnBody = -1;
table->HoveredColumnBorder = -1;
const ImRect mouse_hit_rect(table->OuterRect.Min.x, table->OuterRect.Min.y, table->OuterRect.Max.x, ImMax(table->OuterRect.Max.y, table->OuterRect.Min.y + table->LastOuterHeight));
const bool is_hovering_table = ItemHoverable(mouse_hit_rect, 0);
// [Part 6] Setup final position, offset, skip/clip states and clipping rectangles, detect hovered column
// Process columns in their visible orders as we are comparing the visible order and adjusting host_clip_rect while looping.
int visible_n = 0;
bool offset_x_frozen = (table->FreezeColumnsCount > 0);
float offset_x = ((table->FreezeColumnsCount > 0) ? table->OuterRect.Min.x : work_rect.Min.x) + table->OuterPaddingX - table->CellSpacingX1;
ImRect host_clip_rect = table->InnerClipRect;
//host_clip_rect.Max.x += table->CellPaddingX + table->CellSpacingX2;
table->VisibleMaskByIndex = 0x00;
table->RequestOutputMaskByIndex = 0x00;
for (int order_n = 0; order_n < table->ColumnsCount; order_n++)
{
const int column_n = table->DisplayOrderToIndex[order_n];
ImGuiTableColumn* column = &table->Columns[column_n];
column->NavLayerCurrent = (ImS8)((table->FreezeRowsCount > 0 || column_n < table->FreezeColumnsCount) ? ImGuiNavLayer_Menu : ImGuiNavLayer_Main);
if (offset_x_frozen && table->FreezeColumnsCount == visible_n)
{
offset_x += work_rect.Min.x - table->OuterRect.Min.x;
offset_x_frozen = false;
}
// Clear status flags
column->Flags &= ~ImGuiTableColumnFlags_StatusMask_;
if ((table->EnabledMaskByDisplayOrder & ((ImU64)1 << order_n)) == 0)
{
// Hidden column: clear a few fields and we are done with it for the remainder of the function.
// We set a zero-width clip rect but set Min.y/Max.y properly to not interfere with the clipper.
column->MinX = column->MaxX = column->WorkMinX = column->ClipRect.Min.x = column->ClipRect.Max.x = offset_x;
column->WidthGiven = 0.0f;
column->ClipRect.Min.y = work_rect.Min.y;
column->ClipRect.Max.y = FLT_MAX;
column->ClipRect.ClipWithFull(host_clip_rect);
column->IsVisibleX = column->IsVisibleY = column->IsRequestOutput = false;
column->IsSkipItems = true;
column->ItemWidth = 1.0f;
continue;
}
// Detect hovered column
if (is_hovering_table && g.IO.MousePos.x >= column->ClipRect.Min.x && g.IO.MousePos.x < column->ClipRect.Max.x)
table->HoveredColumnBody = (ImGuiTableColumnIdx)column_n;
// Lock start position
column->MinX = offset_x;
// Lock width based on start position and minimum/maximum width for this position
float max_width = TableGetMaxColumnWidth(table, column_n);
column->WidthGiven = ImMin(column->WidthGiven, max_width);
column->WidthGiven = ImMax(column->WidthGiven, ImMin(column->WidthRequest, table->MinColumnWidth));
column->MaxX = offset_x + column->WidthGiven + table->CellSpacingX1 + table->CellSpacingX2 + table->CellPaddingX * 2.0f;
// Lock other positions
// - ClipRect.Min.x: Because merging draw commands doesn't compare min boundaries, we make ClipRect.Min.x match left bounds to be consistent regardless of merging.
// - ClipRect.Max.x: using WorkMaxX instead of MaxX (aka including padding) makes things more consistent when resizing down, tho slightly detrimental to visibility in very-small column.
// - ClipRect.Max.x: using MaxX makes it easier for header to receive hover highlight with no discontinuity and display sorting arrow.
// - FIXME-TABLE: We want equal width columns to have equal (ClipRect.Max.x - WorkMinX) width, which means ClipRect.max.x cannot stray off host_clip_rect.Max.x else right-most column may appear shorter.
column->WorkMinX = column->MinX + table->CellPaddingX + table->CellSpacingX1;
column->WorkMaxX = column->MaxX - table->CellPaddingX - table->CellSpacingX2; // Expected max
column->ItemWidth = ImFloor(column->WidthGiven * 0.65f);
column->ClipRect.Min.x = column->MinX;
column->ClipRect.Min.y = work_rect.Min.y;
column->ClipRect.Max.x = column->MaxX; //column->WorkMaxX;
column->ClipRect.Max.y = FLT_MAX;
column->ClipRect.ClipWithFull(host_clip_rect);
// Mark column as Clipped (not in sight)
// Note that scrolling tables (where inner_window != outer_window) handle Y clipped earlier in BeginTable() so IsVisibleY really only applies to non-scrolling tables.
// FIXME-TABLE: Because InnerClipRect.Max.y is conservatively ==outer_window->ClipRect.Max.y, we never can mark columns _Above_ the scroll line as not IsVisibleY.
// Taking advantage of LastOuterHeight would yield good results there...
// FIXME-TABLE: Y clipping is disabled because it effectively means not submitting will reduce contents width which is fed to outer_window->DC.CursorMaxPos.x,
// and this may be used (e.g. typically by outer_window using AlwaysAutoResize or outer_window's horizontal scrollbar, but could be something else).
// Possible solution to preserve last known content width for clipped column. Test 'table_reported_size' fails when enabling Y clipping and window is resized small.
column->IsVisibleX = (column->ClipRect.Max.x > column->ClipRect.Min.x);
column->IsVisibleY = true; // (column->ClipRect.Max.y > column->ClipRect.Min.y);
const bool is_visible = column->IsVisibleX; //&& column->IsVisibleY;
if (is_visible)
table->VisibleMaskByIndex |= ((ImU64)1 << column_n);
// Mark column as requesting output from user. Note that fixed + non-resizable sets are auto-fitting at all times and therefore always request output.
column->IsRequestOutput = is_visible || column->AutoFitQueue != 0 || column->CannotSkipItemsQueue != 0;
if (column->IsRequestOutput)
table->RequestOutputMaskByIndex |= ((ImU64)1 << column_n);
// Mark column as SkipItems (ignoring all items/layout)
column->IsSkipItems = !column->IsEnabled || table->HostSkipItems;
if (column->IsSkipItems)
IM_ASSERT(!is_visible);
// Update status flags
column->Flags |= ImGuiTableColumnFlags_IsEnabled;
if (is_visible)
column->Flags |= ImGuiTableColumnFlags_IsVisible;
if (column->SortOrder != -1)
column->Flags |= ImGuiTableColumnFlags_IsSorted;
if (table->HoveredColumnBody == column_n)
column->Flags |= ImGuiTableColumnFlags_IsHovered;
// Alignment
// FIXME-TABLE: This align based on the whole column width, not per-cell, and therefore isn't useful in
// many cases (to be able to honor this we might be able to store a log of cells width, per row, for
// visible rows, but nav/programmatic scroll would have visible artifacts.)
//if (column->Flags & ImGuiTableColumnFlags_AlignRight)
// column->WorkMinX = ImMax(column->WorkMinX, column->MaxX - column->ContentWidthRowsUnfrozen);
//else if (column->Flags & ImGuiTableColumnFlags_AlignCenter)
// column->WorkMinX = ImLerp(column->WorkMinX, ImMax(column->StartX, column->MaxX - column->ContentWidthRowsUnfrozen), 0.5f);
// Reset content width variables
column->ContentMaxXFrozen = column->ContentMaxXUnfrozen = column->WorkMinX;
column->ContentMaxXHeadersUsed = column->ContentMaxXHeadersIdeal = column->WorkMinX;
// Don't decrement auto-fit counters until container window got a chance to submit its items
if (table->HostSkipItems == false)
{
column->AutoFitQueue >>= 1;
column->CannotSkipItemsQueue >>= 1;
}
if (visible_n < table->FreezeColumnsCount)
host_clip_rect.Min.x = ImClamp(column->MaxX + TABLE_BORDER_SIZE, host_clip_rect.Min.x, host_clip_rect.Max.x);
offset_x += column->WidthGiven + table->CellSpacingX1 + table->CellSpacingX2 + table->CellPaddingX * 2.0f;
visible_n++;
}
// [Part 7] Detect/store when we are hovering the unused space after the right-most column (so e.g. context menus can react on it)
// Clear Resizable flag if none of our column are actually resizable (either via an explicit _NoResize flag, either
// because of using _WidthAuto/_WidthStretch). This will hide the resizing option from the context menu.
const float unused_x1 = ImMax(table->WorkRect.Min.x, table->Columns[table->RightMostEnabledColumn].ClipRect.Max.x);
if (is_hovering_table && table->HoveredColumnBody == -1)
{
if (g.IO.MousePos.x >= unused_x1)
table->HoveredColumnBody = (ImGuiTableColumnIdx)table->ColumnsCount;
}
if (has_resizable == false && (table->Flags & ImGuiTableFlags_Resizable))
table->Flags &= ~ImGuiTableFlags_Resizable;
// [Part 8] Lock actual OuterRect/WorkRect right-most position.
// This is done late to handle the case of fixed-columns tables not claiming more widths that they need.
// Because of this we are careful with uses of WorkRect and InnerClipRect before this point.
if (table->RightMostStretchedColumn != -1)
table->Flags &= ~ImGuiTableFlags_NoHostExtendX;
if (table->Flags & ImGuiTableFlags_NoHostExtendX)
{
table->OuterRect.Max.x = table->WorkRect.Max.x = unused_x1;
table->InnerClipRect.Max.x = ImMin(table->InnerClipRect.Max.x, unused_x1);
}
table->InnerWindow->ParentWorkRect = table->WorkRect;
table->BorderX1 = table->InnerClipRect.Min.x;// +((table->Flags & ImGuiTableFlags_BordersOuter) ? 0.0f : -1.0f);
table->BorderX2 = table->InnerClipRect.Max.x;// +((table->Flags & ImGuiTableFlags_BordersOuter) ? 0.0f : +1.0f);
// [Part 9] Allocate draw channels and setup background cliprect
TableSetupDrawChannels(table);
// [Part 10] Hit testing on borders
if (table->Flags & ImGuiTableFlags_Resizable)
TableUpdateBorders(table);
table->LastFirstRowHeight = 0.0f;
table->IsLayoutLocked = true;
table->IsUsingHeaders = false;
// [Part 11] Context menu
if (table->IsContextPopupOpen && table->InstanceCurrent == table->InstanceInteracted)
{
const ImGuiID context_menu_id = ImHashStr("##ContextMenu", 0, table->ID);
if (BeginPopupEx(context_menu_id, ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoSavedSettings))
{
TableDrawContextMenu(table);
EndPopup();
}
else
{
table->IsContextPopupOpen = false;
}
}
// [Part 13] Sanitize and build sort specs before we have a change to use them for display.
// This path will only be exercised when sort specs are modified before header rows (e.g. init or visibility change)
if (table->IsSortSpecsDirty && (table->Flags & ImGuiTableFlags_Sortable))
TableSortSpecsBuild(table);
// Initial state
ImGuiWindow* inner_window = table->InnerWindow;
if (table->Flags & ImGuiTableFlags_NoClip)
table->DrawSplitter->SetCurrentChannel(inner_window->DrawList, TABLE_DRAW_CHANNEL_NOCLIP);
else
inner_window->DrawList->PushClipRect(inner_window->ClipRect.Min, inner_window->ClipRect.Max, false);
}
// Process hit-testing on resizing borders. Actual size change will be applied in EndTable()
// - Set table->HoveredColumnBorder with a short delay/timer to reduce feedback noise
// - Submit ahead of table contents and header, use ImGuiButtonFlags_AllowItemOverlap to prioritize widgets
// overlapping the same area.
void ImGui::TableUpdateBorders(ImGuiTable* table)
{
ImGuiContext& g = *GImGui;
IM_ASSERT(table->Flags & ImGuiTableFlags_Resizable);
// At this point OuterRect height may be zero or under actual final height, so we rely on temporal coherency and
// use the final height from last frame. Because this is only affecting _interaction_ with columns, it is not
// really problematic (whereas the actual visual will be displayed in EndTable() and using the current frame height).
// Actual columns highlight/render will be performed in EndTable() and not be affected.
const float hit_half_width = TABLE_RESIZE_SEPARATOR_HALF_THICKNESS;
const float hit_y1 = table->OuterRect.Min.y;
const float hit_y2_body = ImMax(table->OuterRect.Max.y, hit_y1 + table->LastOuterHeight);
const float hit_y2_head = hit_y1 + table->LastFirstRowHeight;
for (int order_n = 0; order_n < table->ColumnsCount; order_n++)
{
if (!(table->EnabledMaskByDisplayOrder & ((ImU64)1 << order_n)))
continue;
const int column_n = table->DisplayOrderToIndex[order_n];
ImGuiTableColumn* column = &table->Columns[column_n];
if (column->Flags & (ImGuiTableColumnFlags_NoResize | ImGuiTableColumnFlags_NoDirectResize_))
continue;
// ImGuiTableFlags_NoBordersInBodyUntilResize will be honored in TableDrawBorders()
const float border_y2_hit = (table->Flags & ImGuiTableFlags_NoBordersInBody) ? hit_y2_head : hit_y2_body;
if ((table->Flags & ImGuiTableFlags_NoBordersInBody) && table->IsUsingHeaders == false)
continue;
if (!column->IsVisibleX && table->LastResizedColumn != column_n)
continue;
ImGuiID column_id = TableGetColumnResizeID(table, column_n, table->InstanceCurrent);
ImRect hit_rect(column->MaxX - hit_half_width, hit_y1, column->MaxX + hit_half_width, border_y2_hit);
//GetForegroundDrawList()->AddRect(hit_rect.Min, hit_rect.Max, IM_COL32(255, 0, 0, 100));
KeepAliveID(column_id);
bool hovered = false, held = false;
bool pressed = ButtonBehavior(hit_rect, column_id, &hovered, &held, ImGuiButtonFlags_FlattenChildren | ImGuiButtonFlags_AllowItemOverlap | ImGuiButtonFlags_PressedOnClick | ImGuiButtonFlags_PressedOnDoubleClick);
if (pressed && IsMouseDoubleClicked(0))
{
TableSetColumnWidthAutoSingle(table, column_n);
ClearActiveID();
held = hovered = false;
}
if (held)
{
if (table->LastResizedColumn == -1)
table->ResizeLockMinContentsX2 = table->RightMostEnabledColumn != -1 ? table->Columns[table->RightMostEnabledColumn].MaxX : -FLT_MAX;
table->ResizedColumn = (ImGuiTableColumnIdx)column_n;
table->InstanceInteracted = table->InstanceCurrent;
}
if ((hovered && g.HoveredIdTimer > TABLE_RESIZE_SEPARATOR_FEEDBACK_TIMER) || held)
{
table->HoveredColumnBorder = (ImGuiTableColumnIdx)column_n;
SetMouseCursor(ImGuiMouseCursor_ResizeEW);
}
}
}
void ImGui::EndTable()
{
ImGuiContext& g = *GImGui;
ImGuiTable* table = g.CurrentTable;
IM_ASSERT(table != NULL && "Only call EndTable() if BeginTable() returns true!");
// This assert would be very useful to catch a common error... unfortunately it would probably trigger in some
// cases, and for consistency user may sometimes output empty tables (and still benefit from e.g. outer border)
//IM_ASSERT(table->IsLayoutLocked && "Table unused: never called TableNextRow(), is that the intent?");
// If the user never got to call TableNextRow() or TableNextColumn(), we call layout ourselves to ensure all our
// code paths are consistent (instead of just hoping that TableBegin/TableEnd will work), get borders drawn, etc.
if (!table->IsLayoutLocked)
TableUpdateLayout(table);
const ImGuiTableFlags flags = table->Flags;
ImGuiWindow* inner_window = table->InnerWindow;
ImGuiWindow* outer_window = table->OuterWindow;
ImGuiTableTempData* temp_data = table->TempData;
IM_ASSERT(inner_window == g.CurrentWindow);
IM_ASSERT(outer_window == inner_window || outer_window == inner_window->ParentWindow);
if (table->IsInsideRow)
TableEndRow(table);
// Context menu in columns body
if (flags & ImGuiTableFlags_ContextMenuInBody)
if (table->HoveredColumnBody != -1 && !IsAnyItemHovered() && IsMouseReleased(ImGuiMouseButton_Right))
TableOpenContextMenu((int)table->HoveredColumnBody);
// Finalize table height
inner_window->DC.PrevLineSize = temp_data->HostBackupPrevLineSize;
inner_window->DC.CurrLineSize = temp_data->HostBackupCurrLineSize;
inner_window->DC.CursorMaxPos = temp_data->HostBackupCursorMaxPos;
const float inner_content_max_y = table->RowPosY2;
IM_ASSERT(table->RowPosY2 == inner_window->DC.CursorPos.y);
if (inner_window != outer_window)
inner_window->DC.CursorMaxPos.y = inner_content_max_y;
else if (!(flags & ImGuiTableFlags_NoHostExtendY))
table->OuterRect.Max.y = table->InnerRect.Max.y = ImMax(table->OuterRect.Max.y, inner_content_max_y); // Patch OuterRect/InnerRect height
table->WorkRect.Max.y = ImMax(table->WorkRect.Max.y, table->OuterRect.Max.y);
table->LastOuterHeight = table->OuterRect.GetHeight();
// Setup inner scrolling range
// FIXME: This ideally should be done earlier, in BeginTable() SetNextWindowContentSize call, just like writing to inner_window->DC.CursorMaxPos.y,
// but since the later is likely to be impossible to do we'd rather update both axises together.
if (table->Flags & ImGuiTableFlags_ScrollX)
{
const float outer_padding_for_border = (table->Flags & ImGuiTableFlags_BordersOuterV) ? TABLE_BORDER_SIZE : 0.0f;
float max_pos_x = table->InnerWindow->DC.CursorMaxPos.x;
if (table->RightMostEnabledColumn != -1)
max_pos_x = ImMax(max_pos_x, table->Columns[table->RightMostEnabledColumn].WorkMaxX + table->CellPaddingX + table->OuterPaddingX - outer_padding_for_border);
if (table->ResizedColumn != -1)
max_pos_x = ImMax(max_pos_x, table->ResizeLockMinContentsX2);
table->InnerWindow->DC.CursorMaxPos.x = max_pos_x;
}
// Pop clipping rect
if (!(flags & ImGuiTableFlags_NoClip))
inner_window->DrawList->PopClipRect();
inner_window->ClipRect = inner_window->DrawList->_ClipRectStack.back();
// Draw borders
if ((flags & ImGuiTableFlags_Borders) != 0)
TableDrawBorders(table);
#if 0
// Strip out dummy channel draw calls
// We have no way to prevent user submitting direct ImDrawList calls into a hidden column (but ImGui:: calls will be clipped out)
// Pros: remove draw calls which will have no effect. since they'll have zero-size cliprect they may be early out anyway.
// Cons: making it harder for users watching metrics/debugger to spot the wasted vertices.
if (table->DummyDrawChannel != (ImGuiTableColumnIdx)-1)
{
ImDrawChannel* dummy_channel = &table->DrawSplitter._Channels[table->DummyDrawChannel];
dummy_channel->_CmdBuffer.resize(0);
dummy_channel->_IdxBuffer.resize(0);
}
#endif
// Flatten channels and merge draw calls
ImDrawListSplitter* splitter = table->DrawSplitter;
splitter->SetCurrentChannel(inner_window->DrawList, 0);
if ((table->Flags & ImGuiTableFlags_NoClip) == 0)
TableMergeDrawChannels(table);
splitter->Merge(inner_window->DrawList);
// Update ColumnsAutoFitWidth to get us ahead for host using our size to auto-resize without waiting for next BeginTable()
const float width_spacings = (table->OuterPaddingX * 2.0f) + (table->CellSpacingX1 + table->CellSpacingX2) * (table->ColumnsEnabledCount - 1);
table->ColumnsAutoFitWidth = width_spacings + (table->CellPaddingX * 2.0f) * table->ColumnsEnabledCount;
for (int column_n = 0; column_n < table->ColumnsCount; column_n++)
if (table->EnabledMaskByIndex & ((ImU64)1 << column_n))
{
ImGuiTableColumn* column = &table->Columns[column_n];
if ((column->Flags & ImGuiTableColumnFlags_WidthFixed) && !(column->Flags & ImGuiTableColumnFlags_NoResize))
table->ColumnsAutoFitWidth += column->WidthRequest;
else
table->ColumnsAutoFitWidth += TableGetColumnWidthAuto(table, column);
}
// Update scroll
if ((table->Flags & ImGuiTableFlags_ScrollX) == 0 && inner_window != outer_window)
{
inner_window->Scroll.x = 0.0f;
}
else if (table->LastResizedColumn != -1 && table->ResizedColumn == -1 && inner_window->ScrollbarX && table->InstanceInteracted == table->InstanceCurrent)
{
// When releasing a column being resized, scroll to keep the resulting column in sight
const float neighbor_width_to_keep_visible = table->MinColumnWidth + table->CellPaddingX * 2.0f;
ImGuiTableColumn* column = &table->Columns[table->LastResizedColumn];
if (column->MaxX < table->InnerClipRect.Min.x)
SetScrollFromPosX(inner_window, column->MaxX - inner_window->Pos.x - neighbor_width_to_keep_visible, 1.0f);
else if (column->MaxX > table->InnerClipRect.Max.x)
SetScrollFromPosX(inner_window, column->MaxX - inner_window->Pos.x + neighbor_width_to_keep_visible, 1.0f);
}
// Apply resizing/dragging at the end of the frame
if (table->ResizedColumn != -1 && table->InstanceCurrent == table->InstanceInteracted)
{
ImGuiTableColumn* column = &table->Columns[table->ResizedColumn];
const float new_x2 = (g.IO.MousePos.x - g.ActiveIdClickOffset.x + TABLE_RESIZE_SEPARATOR_HALF_THICKNESS);
const float new_width = ImFloor(new_x2 - column->MinX - table->CellSpacingX1 - table->CellPaddingX * 2.0f);
table->ResizedColumnNextWidth = new_width;
}
// Pop from id stack
IM_ASSERT_USER_ERROR(inner_window->IDStack.back() == table->ID + table->InstanceCurrent, "Mismatching PushID/PopID!");
IM_ASSERT_USER_ERROR(outer_window->DC.ItemWidthStack.Size >= temp_data->HostBackupItemWidthStackSize, "Too many PopItemWidth!");
PopID();
// Restore window data that we modified
const ImVec2 backup_outer_max_pos = outer_window->DC.CursorMaxPos;
inner_window->WorkRect = temp_data->HostBackupWorkRect;
inner_window->ParentWorkRect = temp_data->HostBackupParentWorkRect;
inner_window->SkipItems = table->HostSkipItems;
outer_window->DC.CursorPos = table->OuterRect.Min;
outer_window->DC.ItemWidth = temp_data->HostBackupItemWidth;
outer_window->DC.ItemWidthStack.Size = temp_data->HostBackupItemWidthStackSize;
outer_window->DC.ColumnsOffset = temp_data->HostBackupColumnsOffset;
// Layout in outer window
// (FIXME: To allow auto-fit and allow desirable effect of SameLine() we dissociate 'used' vs 'ideal' size by overriding
// CursorPosPrevLine and CursorMaxPos manually. That should be a more general layout feature, see same problem e.g. #3414)
if (inner_window != outer_window)
{
EndChild();
}
else
{
ItemSize(table->OuterRect.GetSize());
ItemAdd(table->OuterRect, 0);
}
// Override declared contents width/height to enable auto-resize while not needlessly adding a scrollbar
if (table->Flags & ImGuiTableFlags_NoHostExtendX)
{
// FIXME-TABLE: Could we remove this section?
// ColumnsAutoFitWidth may be one frame ahead here since for Fixed+NoResize is calculated from latest contents
IM_ASSERT((table->Flags & ImGuiTableFlags_ScrollX) == 0);
outer_window->DC.CursorMaxPos.x = ImMax(backup_outer_max_pos.x, table->OuterRect.Min.x + table->ColumnsAutoFitWidth);
}
else if (temp_data->UserOuterSize.x <= 0.0f)
{
const float decoration_size = (table->Flags & ImGuiTableFlags_ScrollX) ? inner_window->ScrollbarSizes.x : 0.0f;
outer_window->DC.IdealMaxPos.x = ImMax(outer_window->DC.IdealMaxPos.x, table->OuterRect.Min.x + table->ColumnsAutoFitWidth + decoration_size - temp_data->UserOuterSize.x);
outer_window->DC.CursorMaxPos.x = ImMax(backup_outer_max_pos.x, ImMin(table->OuterRect.Max.x, table->OuterRect.Min.x + table->ColumnsAutoFitWidth));
}
else
{
outer_window->DC.CursorMaxPos.x = ImMax(backup_outer_max_pos.x, table->OuterRect.Max.x);
}
if (temp_data->UserOuterSize.y <= 0.0f)
{
const float decoration_size = (table->Flags & ImGuiTableFlags_ScrollY) ? inner_window->ScrollbarSizes.y : 0.0f;
outer_window->DC.IdealMaxPos.y = ImMax(outer_window->DC.IdealMaxPos.y, inner_content_max_y + decoration_size - temp_data->UserOuterSize.y);
outer_window->DC.CursorMaxPos.y = ImMax(backup_outer_max_pos.y, ImMin(table->OuterRect.Max.y, inner_content_max_y));
}
else
{
// OuterRect.Max.y may already have been pushed downward from the initial value (unless ImGuiTableFlags_NoHostExtendY is set)
outer_window->DC.CursorMaxPos.y = ImMax(backup_outer_max_pos.y, table->OuterRect.Max.y);
}
// Save settings
if (table->IsSettingsDirty)
TableSaveSettings(table);
table->IsInitializing = false;
// Clear or restore current table, if any
IM_ASSERT(g.CurrentWindow == outer_window && g.CurrentTable == table);
IM_ASSERT(g.CurrentTableStackIdx >= 0);
g.CurrentTableStackIdx--;
temp_data = g.CurrentTableStackIdx >= 0 ? &g.TablesTempDataStack[g.CurrentTableStackIdx] : NULL;
g.CurrentTable = temp_data ? g.Tables.GetByIndex(temp_data->TableIndex) : NULL;
if (g.CurrentTable)
{
g.CurrentTable->TempData = temp_data;
g.CurrentTable->DrawSplitter = &temp_data->DrawSplitter;
}
outer_window->DC.CurrentTableIdx = g.CurrentTable ? g.Tables.GetIndex(g.CurrentTable) : -1;
}
// See "COLUMN SIZING POLICIES" comments at the top of this file
// If (init_width_or_weight <= 0.0f) it is ignored
void ImGui::TableSetupColumn(const char* label, ImGuiTableColumnFlags flags, float init_width_or_weight, ImGuiID user_id)
{
ImGuiContext& g = *GImGui;
ImGuiTable* table = g.CurrentTable;
IM_ASSERT(table != NULL && "Need to call TableSetupColumn() after BeginTable()!");
IM_ASSERT(table->IsLayoutLocked == false && "Need to call call TableSetupColumn() before first row!");
IM_ASSERT((flags & ImGuiTableColumnFlags_StatusMask_) == 0 && "Illegal to pass StatusMask values to TableSetupColumn()");
if (table->DeclColumnsCount >= table->ColumnsCount)
{
IM_ASSERT_USER_ERROR(table->DeclColumnsCount < table->ColumnsCount, "Called TableSetupColumn() too many times!");
return;
}
ImGuiTableColumn* column = &table->Columns[table->DeclColumnsCount];
table->DeclColumnsCount++;
// Assert when passing a width or weight if policy is entirely left to default, to avoid storing width into weight and vice-versa.
// Give a grace to users of ImGuiTableFlags_ScrollX.
if (table->IsDefaultSizingPolicy && (flags & ImGuiTableColumnFlags_WidthMask_) == 0 && (flags & ImGuiTableFlags_ScrollX) == 0)
IM_ASSERT(init_width_or_weight <= 0.0f && "Can only specify width/weight if sizing policy is set explicitly in either Table or Column.");
// When passing a width automatically enforce WidthFixed policy
// (whereas TableSetupColumnFlags would default to WidthAuto if table is not Resizable)
if ((flags & ImGuiTableColumnFlags_WidthMask_) == 0 && init_width_or_weight > 0.0f)
if ((table->Flags & ImGuiTableFlags_SizingMask_) == ImGuiTableFlags_SizingFixedFit || (table->Flags & ImGuiTableFlags_SizingMask_) == ImGuiTableFlags_SizingFixedSame)
flags |= ImGuiTableColumnFlags_WidthFixed;
TableSetupColumnFlags(table, column, flags);
column->UserID = user_id;
flags = column->Flags;
// Initialize defaults
column->InitStretchWeightOrWidth = init_width_or_weight;
if (table->IsInitializing)
{
// Init width or weight
if (column->WidthRequest < 0.0f && column->StretchWeight < 0.0f)
{
if ((flags & ImGuiTableColumnFlags_WidthFixed) && init_width_or_weight > 0.0f)
column->WidthRequest = init_width_or_weight;
if (flags & ImGuiTableColumnFlags_WidthStretch)
column->StretchWeight = (init_width_or_weight > 0.0f) ? init_width_or_weight : -1.0f;
// Disable auto-fit if an explicit width/weight has been specified
if (init_width_or_weight > 0.0f)
column->AutoFitQueue = 0x00;
}
// Init default visibility/sort state
if ((flags & ImGuiTableColumnFlags_DefaultHide) && (table->SettingsLoadedFlags & ImGuiTableFlags_Hideable) == 0)
column->IsUserEnabled = column->IsUserEnabledNextFrame = false;
if (flags & ImGuiTableColumnFlags_DefaultSort && (table->SettingsLoadedFlags & ImGuiTableFlags_Sortable) == 0)
{
column->SortOrder = 0; // Multiple columns using _DefaultSort will be reassigned unique SortOrder values when building the sort specs.
column->SortDirection = (column->Flags & ImGuiTableColumnFlags_PreferSortDescending) ? (ImS8)ImGuiSortDirection_Descending : (ImU8)(ImGuiSortDirection_Ascending);
}
}
// Store name (append with zero-terminator in contiguous buffer)
column->NameOffset = -1;
if (label != NULL && label[0] != 0)
{
column->NameOffset = (ImS16)table->ColumnsNames.size();
table->ColumnsNames.append(label, label + strlen(label) + 1);
}
}
// [Public]
void ImGui::TableSetupScrollFreeze(int columns, int rows)
{
ImGuiContext& g = *GImGui;
ImGuiTable* table = g.CurrentTable;
IM_ASSERT(table != NULL && "Need to call TableSetupColumn() after BeginTable()!");
IM_ASSERT(table->IsLayoutLocked == false && "Need to call TableSetupColumn() before first row!");
IM_ASSERT(columns >= 0 && columns < IMGUI_TABLE_MAX_COLUMNS);
IM_ASSERT(rows >= 0 && rows < 128); // Arbitrary limit
table->FreezeColumnsRequest = (table->Flags & ImGuiTableFlags_ScrollX) ? (ImGuiTableColumnIdx)ImMin(columns, table->ColumnsCount) : 0;
table->FreezeColumnsCount = (table->InnerWindow->Scroll.x != 0.0f) ? table->FreezeColumnsRequest : 0;
table->FreezeRowsRequest = (table->Flags & ImGuiTableFlags_ScrollY) ? (ImGuiTableColumnIdx)rows : 0;
table->FreezeRowsCount = (table->InnerWindow->Scroll.y != 0.0f) ? table->FreezeRowsRequest : 0;
table->IsUnfrozenRows = (table->FreezeRowsCount == 0); // Make sure this is set before TableUpdateLayout() so ImGuiListClipper can benefit from it.b
// Ensure frozen columns are ordered in their section. We still allow multiple frozen columns to be reordered.
for (int column_n = 0; column_n < table->FreezeColumnsRequest; column_n++)
{
int order_n = table->DisplayOrderToIndex[column_n];
if (order_n != column_n && order_n >= table->FreezeColumnsRequest)
{
ImSwap(table->Columns[table->DisplayOrderToIndex[order_n]].DisplayOrder, table->Columns[table->DisplayOrderToIndex[column_n]].DisplayOrder);
ImSwap(table->DisplayOrderToIndex[order_n], table->DisplayOrderToIndex[column_n]);
}
}
}
//-----------------------------------------------------------------------------
// [SECTION] Tables: Simple accessors
//-----------------------------------------------------------------------------
// - TableGetColumnCount()
// - TableGetColumnName()
// - TableGetColumnName() [Internal]
// - TableSetColumnEnabled()
// - TableGetColumnFlags()
// - TableGetCellBgRect() [Internal]
// - TableGetColumnResizeID() [Internal]
// - TableGetHoveredColumn() [Internal]
// - TableSetBgColor()
//-----------------------------------------------------------------------------
int ImGui::TableGetColumnCount()
{
ImGuiContext& g = *GImGui;
ImGuiTable* table = g.CurrentTable;
return table ? table->ColumnsCount : 0;
}
const char* ImGui::TableGetColumnName(int column_n)
{
ImGuiContext& g = *GImGui;
ImGuiTable* table = g.CurrentTable;
if (!table)
return NULL;
if (column_n < 0)
column_n = table->CurrentColumn;
return TableGetColumnName(table, column_n);
}
const char* ImGui::TableGetColumnName(const ImGuiTable* table, int column_n)
{
if (table->IsLayoutLocked == false && column_n >= table->DeclColumnsCount)
return ""; // NameOffset is invalid at this point
const ImGuiTableColumn* column = &table->Columns[column_n];
if (column->NameOffset == -1)
return "";
return &table->ColumnsNames.Buf[column->NameOffset];
}
// Change user accessible enabled/disabled state of a column (often perceived as "showing/hiding" from users point of view)
// Note that end-user can use the context menu to change this themselves (right-click in headers, or right-click in columns body with ImGuiTableFlags_ContextMenuInBody)
// - Require table to have the ImGuiTableFlags_Hideable flag because we are manipulating user accessible state.
// - Request will be applied during next layout, which happens on the first call to TableNextRow() after BeginTable().
// - For the getter you can test (TableGetColumnFlags() & ImGuiTableColumnFlags_IsEnabled) != 0.
// - Alternative: the ImGuiTableColumnFlags_Disabled is an overriding/master disable flag which will also hide the column from context menu.
void ImGui::TableSetColumnEnabled(int column_n, bool enabled)
{
ImGuiContext& g = *GImGui;
ImGuiTable* table = g.CurrentTable;
IM_ASSERT(table != NULL);
if (!table)
return;
IM_ASSERT(table->Flags & ImGuiTableFlags_Hideable); // See comments above
if (column_n < 0)
column_n = table->CurrentColumn;
IM_ASSERT(column_n >= 0 && column_n < table->ColumnsCount);
ImGuiTableColumn* column = &table->Columns[column_n];
column->IsUserEnabledNextFrame = enabled;
}
// We allow querying for an extra column in order to poll the IsHovered state of the right-most section
ImGuiTableColumnFlags ImGui::TableGetColumnFlags(int column_n)
{
ImGuiContext& g = *GImGui;
ImGuiTable* table = g.CurrentTable;
if (!table)
return ImGuiTableColumnFlags_None;
if (column_n < 0)
column_n = table->CurrentColumn;
if (column_n == table->ColumnsCount)
return (table->HoveredColumnBody == column_n) ? ImGuiTableColumnFlags_IsHovered : ImGuiTableColumnFlags_None;
return table->Columns[column_n].Flags;
}
// Return the cell rectangle based on currently known height.
// - Important: we generally don't know our row height until the end of the row, so Max.y will be incorrect in many situations.
// The only case where this is correct is if we provided a min_row_height to TableNextRow() and don't go below it.
// - Important: if ImGuiTableFlags_PadOuterX is set but ImGuiTableFlags_PadInnerX is not set, the outer-most left and right
// columns report a small offset so their CellBgRect can extend up to the outer border.
ImRect ImGui::TableGetCellBgRect(const ImGuiTable* table, int column_n)
{
const ImGuiTableColumn* column = &table->Columns[column_n];
float x1 = column->MinX;
float x2 = column->MaxX;
if (column->PrevEnabledColumn == -1)
x1 -= table->CellSpacingX1;
if (column->NextEnabledColumn == -1)
x2 += table->CellSpacingX2;
return ImRect(x1, table->RowPosY1, x2, table->RowPosY2);
}
// Return the resizing ID for the right-side of the given column.
ImGuiID ImGui::TableGetColumnResizeID(const ImGuiTable* table, int column_n, int instance_no)
{
IM_ASSERT(column_n >= 0 && column_n < table->ColumnsCount);
ImGuiID id = table->ID + 1 + (instance_no * table->ColumnsCount) + column_n;
return id;
}
// Return -1 when table is not hovered. return columns_count if the unused space at the right of visible columns is hovered.
int ImGui::TableGetHoveredColumn()
{
ImGuiContext& g = *GImGui;
ImGuiTable* table = g.CurrentTable;
if (!table)
return -1;
return (int)table->HoveredColumnBody;
}
void ImGui::TableSetBgColor(ImGuiTableBgTarget target, ImU32 color, int column_n)
{
ImGuiContext& g = *GImGui;
ImGuiTable* table = g.CurrentTable;
IM_ASSERT(target != ImGuiTableBgTarget_None);
if (color == IM_COL32_DISABLE)
color = 0;
// We cannot draw neither the cell or row background immediately as we don't know the row height at this point in time.
switch (target)
{
case ImGuiTableBgTarget_CellBg:
{
if (table->RowPosY1 > table->InnerClipRect.Max.y) // Discard
return;
if (column_n == -1)
column_n = table->CurrentColumn;
if ((table->VisibleMaskByIndex & ((ImU64)1 << column_n)) == 0)
return;
if (table->RowCellDataCurrent < 0 || table->RowCellData[table->RowCellDataCurrent].Column != column_n)
table->RowCellDataCurrent++;
ImGuiTableCellData* cell_data = &table->RowCellData[table->RowCellDataCurrent];
cell_data->BgColor = color;
cell_data->Column = (ImGuiTableColumnIdx)column_n;
break;
}
case ImGuiTableBgTarget_RowBg0:
case ImGuiTableBgTarget_RowBg1:
{
if (table->RowPosY1 > table->InnerClipRect.Max.y) // Discard
return;
IM_ASSERT(column_n == -1);
int bg_idx = (target == ImGuiTableBgTarget_RowBg1) ? 1 : 0;
table->RowBgColor[bg_idx] = color;
break;
}
default:
IM_ASSERT(0);
}
}
//-------------------------------------------------------------------------
// [SECTION] Tables: Row changes
//-------------------------------------------------------------------------
// - TableGetRowIndex()
// - TableNextRow()
// - TableBeginRow() [Internal]
// - TableEndRow() [Internal]
//-------------------------------------------------------------------------
// [Public] Note: for row coloring we use ->RowBgColorCounter which is the same value without counting header rows
int ImGui::TableGetRowIndex()
{
ImGuiContext& g = *GImGui;
ImGuiTable* table = g.CurrentTable;
if (!table)
return 0;
return table->CurrentRow;
}
// [Public] Starts into the first cell of a new row
void ImGui::TableNextRow(ImGuiTableRowFlags row_flags, float row_min_height)
{
ImGuiContext& g = *GImGui;
ImGuiTable* table = g.CurrentTable;
if (!table->IsLayoutLocked)
TableUpdateLayout(table);
if (table->IsInsideRow)
TableEndRow(table);
table->LastRowFlags = table->RowFlags;
table->RowFlags = row_flags;
table->RowMinHeight = row_min_height;
TableBeginRow(table);
// We honor min_row_height requested by user, but cannot guarantee per-row maximum height,
// because that would essentially require a unique clipping rectangle per-cell.
table->RowPosY2 += table->CellPaddingY * 2.0f;
table->RowPosY2 = ImMax(table->RowPosY2, table->RowPosY1 + row_min_height);
// Disable output until user calls TableNextColumn()
table->InnerWindow->SkipItems = true;
}
// [Internal] Called by TableNextRow()
void ImGui::TableBeginRow(ImGuiTable* table)
{
ImGuiWindow* window = table->InnerWindow;
IM_ASSERT(!table->IsInsideRow);
// New row
table->CurrentRow++;
table->CurrentColumn = -1;
table->RowBgColor[0] = table->RowBgColor[1] = IM_COL32_DISABLE;
table->RowCellDataCurrent = -1;
table->IsInsideRow = true;
// Begin frozen rows
float next_y1 = table->RowPosY2;
if (table->CurrentRow == 0 && table->FreezeRowsCount > 0)
next_y1 = window->DC.CursorPos.y = table->OuterRect.Min.y;
table->RowPosY1 = table->RowPosY2 = next_y1;
table->RowTextBaseline = 0.0f;
table->RowIndentOffsetX = window->DC.Indent.x - table->HostIndentX; // Lock indent
window->DC.PrevLineTextBaseOffset = 0.0f;
window->DC.CursorMaxPos.y = next_y1;
// Making the header BG color non-transparent will allow us to overlay it multiple times when handling smooth dragging.
if (table->RowFlags & ImGuiTableRowFlags_Headers)
{
TableSetBgColor(ImGuiTableBgTarget_RowBg0, GetColorU32(ImGuiCol_TableHeaderBg));
if (table->CurrentRow == 0)
table->IsUsingHeaders = true;
}
}
// [Internal] Called by TableNextRow()
void ImGui::TableEndRow(ImGuiTable* table)
{
ImGuiContext& g = *GImGui;
ImGuiWindow* window = g.CurrentWindow;
IM_ASSERT(window == table->InnerWindow);
IM_ASSERT(table->IsInsideRow);
if (table->CurrentColumn != -1)
TableEndCell(table);
// Logging
if (g.LogEnabled)
LogRenderedText(NULL, "|");
// Position cursor at the bottom of our row so it can be used for e.g. clipping calculation. However it is
// likely that the next call to TableBeginCell() will reposition the cursor to take account of vertical padding.
window->DC.CursorPos.y = table->RowPosY2;
// Row background fill
const float bg_y1 = table->RowPosY1;
const float bg_y2 = table->RowPosY2;
const bool unfreeze_rows_actual = (table->CurrentRow + 1 == table->FreezeRowsCount);
const bool unfreeze_rows_request = (table->CurrentRow + 1 == table->FreezeRowsRequest);
if (table->CurrentRow == 0)
table->LastFirstRowHeight = bg_y2 - bg_y1;
const bool is_visible = (bg_y2 >= table->InnerClipRect.Min.y && bg_y1 <= table->InnerClipRect.Max.y);
if (is_visible)
{
// Decide of background color for the row
ImU32 bg_col0 = 0;
ImU32 bg_col1 = 0;
if (table->RowBgColor[0] != IM_COL32_DISABLE)
bg_col0 = table->RowBgColor[0];
else if (table->Flags & ImGuiTableFlags_RowBg)
bg_col0 = GetColorU32((table->RowBgColorCounter & 1) ? ImGuiCol_TableRowBgAlt : ImGuiCol_TableRowBg);
if (table->RowBgColor[1] != IM_COL32_DISABLE)
bg_col1 = table->RowBgColor[1];
// Decide of top border color
ImU32 border_col = 0;
const float border_size = TABLE_BORDER_SIZE;
if (table->CurrentRow > 0 || table->InnerWindow == table->OuterWindow)
if (table->Flags & ImGuiTableFlags_BordersInnerH)
border_col = (table->LastRowFlags & ImGuiTableRowFlags_Headers) ? table->BorderColorStrong : table->BorderColorLight;
const bool draw_cell_bg_color = table->RowCellDataCurrent >= 0;
const bool draw_strong_bottom_border = unfreeze_rows_actual;
if ((bg_col0 | bg_col1 | border_col) != 0 || draw_strong_bottom_border || draw_cell_bg_color)
{
// In theory we could call SetWindowClipRectBeforeSetChannel() but since we know TableEndRow() is
// always followed by a change of clipping rectangle we perform the smallest overwrite possible here.
if ((table->Flags & ImGuiTableFlags_NoClip) == 0)
window->DrawList->_CmdHeader.ClipRect = table->Bg0ClipRectForDrawCmd.ToVec4();
table->DrawSplitter->SetCurrentChannel(window->DrawList, TABLE_DRAW_CHANNEL_BG0);
}
// Draw row background
// We soft/cpu clip this so all backgrounds and borders can share the same clipping rectangle
if (bg_col0 || bg_col1)
{
ImRect row_rect(table->WorkRect.Min.x, bg_y1, table->WorkRect.Max.x, bg_y2);
row_rect.ClipWith(table->BgClipRect);
if (bg_col0 != 0 && row_rect.Min.y < row_rect.Max.y)
window->DrawList->AddRectFilled(row_rect.Min, row_rect.Max, bg_col0);
if (bg_col1 != 0 && row_rect.Min.y < row_rect.Max.y)
window->DrawList->AddRectFilled(row_rect.Min, row_rect.Max, bg_col1);
}
// Draw cell background color
if (draw_cell_bg_color)
{
ImGuiTableCellData* cell_data_end = &table->RowCellData[table->RowCellDataCurrent];
for (ImGuiTableCellData* cell_data = &table->RowCellData[0]; cell_data <= cell_data_end; cell_data++)
{
const ImGuiTableColumn* column = &table->Columns[cell_data->Column];
ImRect cell_bg_rect = TableGetCellBgRect(table, cell_data->Column);
cell_bg_rect.ClipWith(table->BgClipRect);
cell_bg_rect.Min.x = ImMax(cell_bg_rect.Min.x, column->ClipRect.Min.x); // So that first column after frozen one gets clipped
cell_bg_rect.Max.x = ImMin(cell_bg_rect.Max.x, column->MaxX);
window->DrawList->AddRectFilled(cell_bg_rect.Min, cell_bg_rect.Max, cell_data->BgColor);
}
}
// Draw top border
if (border_col && bg_y1 >= table->BgClipRect.Min.y && bg_y1 < table->BgClipRect.Max.y)
window->DrawList->AddLine(ImVec2(table->BorderX1, bg_y1), ImVec2(table->BorderX2, bg_y1), border_col, border_size);
// Draw bottom border at the row unfreezing mark (always strong)
if (draw_strong_bottom_border && bg_y2 >= table->BgClipRect.Min.y && bg_y2 < table->BgClipRect.Max.y)
window->DrawList->AddLine(ImVec2(table->BorderX1, bg_y2), ImVec2(table->BorderX2, bg_y2), table->BorderColorStrong, border_size);
}
// End frozen rows (when we are past the last frozen row line, teleport cursor and alter clipping rectangle)
// We need to do that in TableEndRow() instead of TableBeginRow() so the list clipper can mark end of row and
// get the new cursor position.
if (unfreeze_rows_request)
for (int column_n = 0; column_n < table->ColumnsCount; column_n++)
{
ImGuiTableColumn* column = &table->Columns[column_n];
column->NavLayerCurrent = (ImS8)((column_n < table->FreezeColumnsCount) ? ImGuiNavLayer_Menu : ImGuiNavLayer_Main);
}
if (unfreeze_rows_actual)
{
IM_ASSERT(table->IsUnfrozenRows == false);
table->IsUnfrozenRows = true;
// BgClipRect starts as table->InnerClipRect, reduce it now and make BgClipRectForDrawCmd == BgClipRect
float y0 = ImMax(table->RowPosY2 + 1, window->InnerClipRect.Min.y);
table->BgClipRect.Min.y = table->Bg2ClipRectForDrawCmd.Min.y = ImMin(y0, window->InnerClipRect.Max.y);
table->BgClipRect.Max.y = table->Bg2ClipRectForDrawCmd.Max.y = window->InnerClipRect.Max.y;
table->Bg2DrawChannelCurrent = table->Bg2DrawChannelUnfrozen;
IM_ASSERT(table->Bg2ClipRectForDrawCmd.Min.y <= table->Bg2ClipRectForDrawCmd.Max.y);
float row_height = table->RowPosY2 - table->RowPosY1;
table->RowPosY2 = window->DC.CursorPos.y = table->WorkRect.Min.y + table->RowPosY2 - table->OuterRect.Min.y;
table->RowPosY1 = table->RowPosY2 - row_height;
for (int column_n = 0; column_n < table->ColumnsCount; column_n++)
{
ImGuiTableColumn* column = &table->Columns[column_n];
column->DrawChannelCurrent = column->DrawChannelUnfrozen;
column->ClipRect.Min.y = table->Bg2ClipRectForDrawCmd.Min.y;
}
// Update cliprect ahead of TableBeginCell() so clipper can access to new ClipRect->Min.y
SetWindowClipRectBeforeSetChannel(window, table->Columns[0].ClipRect);
table->DrawSplitter->SetCurrentChannel(window->DrawList, table->Columns[0].DrawChannelCurrent);
}
if (!(table->RowFlags & ImGuiTableRowFlags_Headers))
table->RowBgColorCounter++;
table->IsInsideRow = false;
}
//-------------------------------------------------------------------------
// [SECTION] Tables: Columns changes
//-------------------------------------------------------------------------
// - TableGetColumnIndex()
// - TableSetColumnIndex()
// - TableNextColumn()
// - TableBeginCell() [Internal]
// - TableEndCell() [Internal]
//-------------------------------------------------------------------------
int ImGui::TableGetColumnIndex()
{
ImGuiContext& g = *GImGui;
ImGuiTable* table = g.CurrentTable;
if (!table)
return 0;
return table->CurrentColumn;
}
// [Public] Append into a specific column
bool ImGui::TableSetColumnIndex(int column_n)
{
ImGuiContext& g = *GImGui;
ImGuiTable* table = g.CurrentTable;
if (!table)
return false;
if (table->CurrentColumn != column_n)
{
if (table->CurrentColumn != -1)
TableEndCell(table);
IM_ASSERT(column_n >= 0 && table->ColumnsCount);
TableBeginCell(table, column_n);
}
// Return whether the column is visible. User may choose to skip submitting items based on this return value,
// however they shouldn't skip submitting for columns that may have the tallest contribution to row height.
return (table->RequestOutputMaskByIndex & ((ImU64)1 << column_n)) != 0;
}
// [Public] Append into the next column, wrap and create a new row when already on last column
bool ImGui::TableNextColumn()
{
ImGuiContext& g = *GImGui;
ImGuiTable* table = g.CurrentTable;
if (!table)
return false;
if (table->IsInsideRow && table->CurrentColumn + 1 < table->ColumnsCount)
{
if (table->CurrentColumn != -1)
TableEndCell(table);
TableBeginCell(table, table->CurrentColumn + 1);
}
else
{
TableNextRow();
TableBeginCell(table, 0);
}
// Return whether the column is visible. User may choose to skip submitting items based on this return value,
// however they shouldn't skip submitting for columns that may have the tallest contribution to row height.
int column_n = table->CurrentColumn;
return (table->RequestOutputMaskByIndex & ((ImU64)1 << column_n)) != 0;
}
// [Internal] Called by TableSetColumnIndex()/TableNextColumn()
// This is called very frequently, so we need to be mindful of unnecessary overhead.
// FIXME-TABLE FIXME-OPT: Could probably shortcut some things for non-active or clipped columns.
void ImGui::TableBeginCell(ImGuiTable* table, int column_n)
{
ImGuiTableColumn* column = &table->Columns[column_n];
ImGuiWindow* window = table->InnerWindow;
table->CurrentColumn = column_n;
// Start position is roughly ~~ CellRect.Min + CellPadding + Indent
float start_x = column->WorkMinX;
if (column->Flags & ImGuiTableColumnFlags_IndentEnable)
start_x += table->RowIndentOffsetX; // ~~ += window.DC.Indent.x - table->HostIndentX, except we locked it for the row.
window->DC.CursorPos.x = start_x;
window->DC.CursorPos.y = table->RowPosY1 + table->CellPaddingY;
window->DC.CursorMaxPos.x = window->DC.CursorPos.x;
window->DC.ColumnsOffset.x = start_x - window->Pos.x - window->DC.Indent.x; // FIXME-WORKRECT
window->DC.CurrLineTextBaseOffset = table->RowTextBaseline;
window->DC.NavLayerCurrent = (ImGuiNavLayer)column->NavLayerCurrent;
window->WorkRect.Min.y = window->DC.CursorPos.y;
window->WorkRect.Min.x = column->WorkMinX;
window->WorkRect.Max.x = column->WorkMaxX;
window->DC.ItemWidth = column->ItemWidth;
// To allow ImGuiListClipper to function we propagate our row height
if (!column->IsEnabled)
window->DC.CursorPos.y = ImMax(window->DC.CursorPos.y, table->RowPosY2);
window->SkipItems = column->IsSkipItems;
if (column->IsSkipItems)
{
window->DC.LastItemId = 0;
window->DC.LastItemStatusFlags = 0;
}
if (table->Flags & ImGuiTableFlags_NoClip)
{
// FIXME: if we end up drawing all borders/bg in EndTable, could remove this and just assert that channel hasn't changed.
table->DrawSplitter->SetCurrentChannel(window->DrawList, TABLE_DRAW_CHANNEL_NOCLIP);
//IM_ASSERT(table->DrawSplitter._Current == TABLE_DRAW_CHANNEL_NOCLIP);
}
else
{
// FIXME-TABLE: Could avoid this if draw channel is dummy channel?
SetWindowClipRectBeforeSetChannel(window, column->ClipRect);
table->DrawSplitter->SetCurrentChannel(window->DrawList, column->DrawChannelCurrent);
}
// Logging
ImGuiContext& g = *GImGui;
if (g.LogEnabled && !column->IsSkipItems)
{
LogRenderedText(&window->DC.CursorPos, "|");
g.LogLinePosY = FLT_MAX;
}
}
// [Internal] Called by TableNextRow()/TableSetColumnIndex()/TableNextColumn()
void ImGui::TableEndCell(ImGuiTable* table)
{
ImGuiTableColumn* column = &table->Columns[table->CurrentColumn];
ImGuiWindow* window = table->InnerWindow;
// Report maximum position so we can infer content size per column.
float* p_max_pos_x;
if (table->RowFlags & ImGuiTableRowFlags_Headers)
p_max_pos_x = &column->ContentMaxXHeadersUsed; // Useful in case user submit contents in header row that is not a TableHeader() call
else
p_max_pos_x = table->IsUnfrozenRows ? &column->ContentMaxXUnfrozen : &column->ContentMaxXFrozen;
*p_max_pos_x = ImMax(*p_max_pos_x, window->DC.CursorMaxPos.x);
table->RowPosY2 = ImMax(table->RowPosY2, window->DC.CursorMaxPos.y + table->CellPaddingY);
column->ItemWidth = window->DC.ItemWidth;
// Propagate text baseline for the entire row
// FIXME-TABLE: Here we propagate text baseline from the last line of the cell.. instead of the first one.
table->RowTextBaseline = ImMax(table->RowTextBaseline, window->DC.PrevLineTextBaseOffset);
}
//-------------------------------------------------------------------------
// [SECTION] Tables: Columns width management
//-------------------------------------------------------------------------
// - TableGetMaxColumnWidth() [Internal]
// - TableGetColumnWidthAuto() [Internal]
// - TableSetColumnWidth()
// - TableSetColumnWidthAutoSingle() [Internal]
// - TableSetColumnWidthAutoAll() [Internal]
// - TableUpdateColumnsWeightFromWidth() [Internal]
//-------------------------------------------------------------------------
// Maximum column content width given current layout. Use column->MinX so this value on a per-column basis.
float ImGui::TableGetMaxColumnWidth(const ImGuiTable* table, int column_n)
{
const ImGuiTableColumn* column = &table->Columns[column_n];
float max_width = FLT_MAX;
const float min_column_distance = table->MinColumnWidth + table->CellPaddingX * 2.0f + table->CellSpacingX1 + table->CellSpacingX2;
if (table->Flags & ImGuiTableFlags_ScrollX)
{
// Frozen columns can't reach beyond visible width else scrolling will naturally break.
// (we use DisplayOrder as within a set of multiple frozen column reordering is possible)
if (column->DisplayOrder < table->FreezeColumnsRequest)
{
max_width = (table->InnerClipRect.Max.x - (table->FreezeColumnsRequest - column->DisplayOrder) * min_column_distance) - column->MinX;
max_width = max_width - table->OuterPaddingX - table->CellPaddingX - table->CellSpacingX2;
}
}
else if ((table->Flags & ImGuiTableFlags_NoKeepColumnsVisible) == 0)
{
// If horizontal scrolling if disabled, we apply a final lossless shrinking of columns in order to make
// sure they are all visible. Because of this we also know that all of the columns will always fit in
// table->WorkRect and therefore in table->InnerRect (because ScrollX is off)
// FIXME-TABLE: This is solved incorrectly but also quite a difficult problem to fix as we also want ClipRect width to match.
// See "table_width_distrib" and "table_width_keep_visible" tests
max_width = table->WorkRect.Max.x - (table->ColumnsEnabledCount - column->IndexWithinEnabledSet - 1) * min_column_distance - column->MinX;
//max_width -= table->CellSpacingX1;
max_width -= table->CellSpacingX2;
max_width -= table->CellPaddingX * 2.0f;
max_width -= table->OuterPaddingX;
}
return max_width;
}
// Note this is meant to be stored in column->WidthAuto, please generally use the WidthAuto field
float ImGui::TableGetColumnWidthAuto(ImGuiTable* table, ImGuiTableColumn* column)
{
const float content_width_body = ImMax(column->ContentMaxXFrozen, column->ContentMaxXUnfrozen) - column->WorkMinX;
const float content_width_headers = column->ContentMaxXHeadersIdeal - column->WorkMinX;
float width_auto = content_width_body;
if (!(column->Flags & ImGuiTableColumnFlags_NoHeaderWidth))
width_auto = ImMax(width_auto, content_width_headers);
// Non-resizable fixed columns preserve their requested width
if ((column->Flags & ImGuiTableColumnFlags_WidthFixed) && column->InitStretchWeightOrWidth > 0.0f)
if (!(table->Flags & ImGuiTableFlags_Resizable) || (column->Flags & ImGuiTableColumnFlags_NoResize))
width_auto = column->InitStretchWeightOrWidth;
return ImMax(width_auto, table->MinColumnWidth);
}
// 'width' = inner column width, without padding
void ImGui::TableSetColumnWidth(int column_n, float width)
{
ImGuiContext& g = *GImGui;
ImGuiTable* table = g.CurrentTable;
IM_ASSERT(table != NULL && table->IsLayoutLocked == false);
IM_ASSERT(column_n >= 0 && column_n < table->ColumnsCount);
ImGuiTableColumn* column_0 = &table->Columns[column_n];
float column_0_width = width;
// Apply constraints early
// Compare both requested and actual given width to avoid overwriting requested width when column is stuck (minimum size, bounded)
IM_ASSERT(table->MinColumnWidth > 0.0f);
const float min_width = table->MinColumnWidth;
const float max_width = ImMax(min_width, TableGetMaxColumnWidth(table, column_n));
column_0_width = ImClamp(column_0_width, min_width, max_width);
if (column_0->WidthGiven == column_0_width || column_0->WidthRequest == column_0_width)
return;
//IMGUI_DEBUG_LOG("TableSetColumnWidth(%d, %.1f->%.1f)\n", column_0_idx, column_0->WidthGiven, column_0_width);
ImGuiTableColumn* column_1 = (column_0->NextEnabledColumn != -1) ? &table->Columns[column_0->NextEnabledColumn] : NULL;
// In this surprisingly not simple because of how we support mixing Fixed and multiple Stretch columns.
// - All fixed: easy.
// - All stretch: easy.
// - One or more fixed + one stretch: easy.
// - One or more fixed + more than one stretch: tricky.
// Qt when manual resize is enabled only support a single _trailing_ stretch column.
// When forwarding resize from Wn| to Fn+1| we need to be considerate of the _NoResize flag on Fn+1.
// FIXME-TABLE: Find a way to rewrite all of this so interactions feel more consistent for the user.
// Scenarios:
// - F1 F2 F3 resize from F1| or F2| --> ok: alter ->WidthRequested of Fixed column. Subsequent columns will be offset.
// - F1 F2 F3 resize from F3| --> ok: alter ->WidthRequested of Fixed column. If active, ScrollX extent can be altered.
// - F1 F2 W3 resize from F1| or F2| --> ok: alter ->WidthRequested of Fixed column. If active, ScrollX extent can be altered, but it doesn't make much sense as the Stretch column will always be minimal size.
// - F1 F2 W3 resize from W3| --> ok: no-op (disabled by Resize Rule 1)
// - W1 W2 W3 resize from W1| or W2| --> ok
// - W1 W2 W3 resize from W3| --> ok: no-op (disabled by Resize Rule 1)
// - W1 F2 F3 resize from F3| --> ok: no-op (disabled by Resize Rule 1)
// - W1 F2 resize from F2| --> ok: no-op (disabled by Resize Rule 1)
// - W1 W2 F3 resize from W1| or W2| --> ok
// - W1 F2 W3 resize from W1| or F2| --> ok
// - F1 W2 F3 resize from W2| --> ok
// - F1 W3 F2 resize from W3| --> ok
// - W1 F2 F3 resize from W1| --> ok: equivalent to resizing |F2. F3 will not move.
// - W1 F2 F3 resize from F2| --> ok
// All resizes from a Wx columns are locking other columns.
// Possible improvements:
// - W1 W2 W3 resize W1| --> to not be stuck, both W2 and W3 would stretch down. Seems possible to fix. Would be most beneficial to simplify resize of all-weighted columns.
// - W3 F1 F2 resize W3| --> to not be stuck past F1|, both F1 and F2 would need to stretch down, which would be lossy or ambiguous. Seems hard to fix.
// [Resize Rule 1] Can't resize from right of right-most visible column if there is any Stretch column. Implemented in TableUpdateLayout().
// If we have all Fixed columns OR resizing a Fixed column that doesn't come after a Stretch one, we can do an offsetting resize.
// This is the preferred resize path
if (column_0->Flags & ImGuiTableColumnFlags_WidthFixed)
if (!column_1 || table->LeftMostStretchedColumn == -1 || table->Columns[table->LeftMostStretchedColumn].DisplayOrder >= column_0->DisplayOrder)
{
column_0->WidthRequest = column_0_width;
table->IsSettingsDirty = true;
return;
}
// We can also use previous column if there's no next one (this is used when doing an auto-fit on the right-most stretch column)
if (column_1 == NULL)
column_1 = (column_0->PrevEnabledColumn != -1) ? &table->Columns[column_0->PrevEnabledColumn] : NULL;
if (column_1 == NULL)
return;
// Resizing from right-side of a Stretch column before a Fixed column forward sizing to left-side of fixed column.
// (old_a + old_b == new_a + new_b) --> (new_a == old_a + old_b - new_b)
float column_1_width = ImMax(column_1->WidthRequest - (column_0_width - column_0->WidthRequest), min_width);
column_0_width = column_0->WidthRequest + column_1->WidthRequest - column_1_width;
IM_ASSERT(column_0_width > 0.0f && column_1_width > 0.0f);
column_0->WidthRequest = column_0_width;
column_1->WidthRequest = column_1_width;
if ((column_0->Flags | column_1->Flags) & ImGuiTableColumnFlags_WidthStretch)
TableUpdateColumnsWeightFromWidth(table);
table->IsSettingsDirty = true;
}
// Disable clipping then auto-fit, will take 2 frames
// (we don't take a shortcut for unclipped columns to reduce inconsistencies when e.g. resizing multiple columns)
void ImGui::TableSetColumnWidthAutoSingle(ImGuiTable* table, int column_n)
{
// Single auto width uses auto-fit
ImGuiTableColumn* column = &table->Columns[column_n];
if (!column->IsEnabled)
return;
column->CannotSkipItemsQueue = (1 << 0);
table->AutoFitSingleColumn = (ImGuiTableColumnIdx)column_n;
}
void ImGui::TableSetColumnWidthAutoAll(ImGuiTable* table)
{
for (int column_n = 0; column_n < table->ColumnsCount; column_n++)
{
ImGuiTableColumn* column = &table->Columns[column_n];
if (!column->IsEnabled && !(column->Flags & ImGuiTableColumnFlags_WidthStretch)) // Cannot reset weight of hidden stretch column
continue;
column->CannotSkipItemsQueue = (1 << 0);
column->AutoFitQueue = (1 << 1);
}
}
void ImGui::TableUpdateColumnsWeightFromWidth(ImGuiTable* table)
{
IM_ASSERT(table->LeftMostStretchedColumn != -1 && table->RightMostStretchedColumn != -1);
// Measure existing quantity
float visible_weight = 0.0f;
float visible_width = 0.0f;
for (int column_n = 0; column_n < table->ColumnsCount; column_n++)
{
ImGuiTableColumn* column = &table->Columns[column_n];
if (!column->IsEnabled || !(column->Flags & ImGuiTableColumnFlags_WidthStretch))
continue;
IM_ASSERT(column->StretchWeight > 0.0f);
visible_weight += column->StretchWeight;
visible_width += column->WidthRequest;
}
IM_ASSERT(visible_weight > 0.0f && visible_width > 0.0f);
// Apply new weights
for (int column_n = 0; column_n < table->ColumnsCount; column_n++)
{
ImGuiTableColumn* column = &table->Columns[column_n];
if (!column->IsEnabled || !(column->Flags & ImGuiTableColumnFlags_WidthStretch))
continue;
column->StretchWeight = (column->WidthRequest / visible_width) * visible_weight;
IM_ASSERT(column->StretchWeight > 0.0f);
}
}
//-------------------------------------------------------------------------
// [SECTION] Tables: Drawing
//-------------------------------------------------------------------------
// - TablePushBackgroundChannel() [Internal]
// - TablePopBackgroundChannel() [Internal]
// - TableSetupDrawChannels() [Internal]
// - TableMergeDrawChannels() [Internal]
// - TableDrawBorders() [Internal]
//-------------------------------------------------------------------------
// Bg2 is used by Selectable (and possibly other widgets) to render to the background.
// Unlike our Bg0/1 channel which we uses for RowBg/CellBg/Borders and where we guarantee all shapes to be CPU-clipped, the Bg2 channel being widgets-facing will rely on regular ClipRect.
void ImGui::TablePushBackgroundChannel()
{
ImGuiContext& g = *GImGui;
ImGuiWindow* window = g.CurrentWindow;
ImGuiTable* table = g.CurrentTable;
// Optimization: avoid SetCurrentChannel() + PushClipRect()
table->HostBackupInnerClipRect = window->ClipRect;
SetWindowClipRectBeforeSetChannel(window, table->Bg2ClipRectForDrawCmd);
table->DrawSplitter->SetCurrentChannel(window->DrawList, table->Bg2DrawChannelCurrent);
}
void ImGui::TablePopBackgroundChannel()
{
ImGuiContext& g = *GImGui;
ImGuiWindow* window = g.CurrentWindow;
ImGuiTable* table = g.CurrentTable;
ImGuiTableColumn* column = &table->Columns[table->CurrentColumn];
// Optimization: avoid PopClipRect() + SetCurrentChannel()
SetWindowClipRectBeforeSetChannel(window, table->HostBackupInnerClipRect);
table->DrawSplitter->SetCurrentChannel(window->DrawList, column->DrawChannelCurrent);
}
// Allocate draw channels. Called by TableUpdateLayout()
// - We allocate them following storage order instead of display order so reordering columns won't needlessly
// increase overall dormant memory cost.
// - We isolate headers draw commands in their own channels instead of just altering clip rects.
// This is in order to facilitate merging of draw commands.
// - After crossing FreezeRowsCount, all columns see their current draw channel changed to a second set of channels.
// - We only use the dummy draw channel so we can push a null clipping rectangle into it without affecting other
// channels, while simplifying per-row/per-cell overhead. It will be empty and discarded when merged.
// - We allocate 1 or 2 background draw channels. This is because we know TablePushBackgroundChannel() is only used for
// horizontal spanning. If we allowed vertical spanning we'd need one background draw channel per merge group (1-4).
// Draw channel allocation (before merging):
// - NoClip --> 2+D+1 channels: bg0/1 + bg2 + foreground (same clip rect == always 1 draw call)
// - Clip --> 2+D+N channels
// - FreezeRows --> 2+D+N*2 (unless scrolling value is zero)
// - FreezeRows || FreezeColunns --> 3+D+N*2 (unless scrolling value is zero)
// Where D is 1 if any column is clipped or hidden (dummy channel) otherwise 0.
void ImGui::TableSetupDrawChannels(ImGuiTable* table)
{
const int freeze_row_multiplier = (table->FreezeRowsCount > 0) ? 2 : 1;
const int channels_for_row = (table->Flags & ImGuiTableFlags_NoClip) ? 1 : table->ColumnsEnabledCount;
const int channels_for_bg = 1 + 1 * freeze_row_multiplier;
const int channels_for_dummy = (table->ColumnsEnabledCount < table->ColumnsCount || table->VisibleMaskByIndex != table->EnabledMaskByIndex) ? +1 : 0;
const int channels_total = channels_for_bg + (channels_for_row * freeze_row_multiplier) + channels_for_dummy;
table->DrawSplitter->Split(table->InnerWindow->DrawList, channels_total);
table->DummyDrawChannel = (ImGuiTableDrawChannelIdx)((channels_for_dummy > 0) ? channels_total - 1 : -1);
table->Bg2DrawChannelCurrent = TABLE_DRAW_CHANNEL_BG2_FROZEN;
table->Bg2DrawChannelUnfrozen = (ImGuiTableDrawChannelIdx)((table->FreezeRowsCount > 0) ? 2 + channels_for_row : TABLE_DRAW_CHANNEL_BG2_FROZEN);
int draw_channel_current = 2;
for (int column_n = 0; column_n < table->ColumnsCount; column_n++)
{
ImGuiTableColumn* column = &table->Columns[column_n];
if (column->IsVisibleX && column->IsVisibleY)
{
column->DrawChannelFrozen = (ImGuiTableDrawChannelIdx)(draw_channel_current);
column->DrawChannelUnfrozen = (ImGuiTableDrawChannelIdx)(draw_channel_current + (table->FreezeRowsCount > 0 ? channels_for_row + 1 : 0));
if (!(table->Flags & ImGuiTableFlags_NoClip))
draw_channel_current++;
}
else
{
column->DrawChannelFrozen = column->DrawChannelUnfrozen =