TreeNode: The collapsing arrow accepts click even if modifier keys are being held, facilitating interactions with multi-select patterns. (#2886, #1896, #1861)
diff --git a/docs/CHANGELOG.txt b/docs/CHANGELOG.txt
index 6aa2940..a28d9cc 100644
--- a/docs/CHANGELOG.txt
+++ b/docs/CHANGELOG.txt
@@ -66,6 +66,8 @@
- ColorPicker: Fixed SV triangle gradient to block (broken in 1.73). (#2864, #2711). [@lewa-j]
- TreeNode: Fixed combination of ImGuiTreeNodeFlags_SpanFullWidth and ImGuiTreeNodeFlags_OpenOnArrow
incorrectly locating the arrow hit position to the left of the frame. (#2451, #2438, #1897)
+- TreeNode: The collapsing arrow accepts click even if modifier keys are being held, facilitating
+ interactions with multi-select patterns. (#2886, #1896, #1861)
- DragScalar, SliderScalar, InputScalar: Added p_ prefix to parameter that are pointers to the data
to clarify how they are used, and more comments redirecting to the demo code. (#2844)
- Misc: Optimized storage of window settings data (reducing allocation count).
diff --git a/imgui_internal.h b/imgui_internal.h
index 37d4602..63357ce 100644
--- a/imgui_internal.h
+++ b/imgui_internal.h
@@ -365,7 +365,7 @@
ImGuiButtonFlags_DontClosePopups = 1 << 7, // disable automatically closing parent popup on press // [UNUSED]
ImGuiButtonFlags_Disabled = 1 << 8, // disable interactions
ImGuiButtonFlags_AlignTextBaseLine = 1 << 9, // vertically align button to match text baseline - ButtonEx() only // FIXME: Should be removed and handled by SmallButton(), not possible currently because of DC.CursorPosPrevLine
- ImGuiButtonFlags_NoKeyModifiers = 1 << 10, // disable interaction if a key modifier is held
+ ImGuiButtonFlags_NoKeyModifiers = 1 << 10, // disable mouse interaction if a key modifier is held
ImGuiButtonFlags_NoHoldingActiveID = 1 << 11, // don't set ActiveId while holding the mouse (ImGuiButtonFlags_PressedOnClick only)
ImGuiButtonFlags_PressedOnDragDropHold = 1 << 12, // press when held into while we are drag and dropping another item (used by e.g. tree nodes, collapsing headers)
ImGuiButtonFlags_NoNavFocus = 1 << 13, // don't override navigation focus when activated
diff --git a/imgui_widgets.cpp b/imgui_widgets.cpp
index 41f96c8..d596831 100644
--- a/imgui_widgets.cpp
+++ b/imgui_widgets.cpp
@@ -5269,7 +5269,7 @@
// - OpenOnDoubleClick .............. double-click anywhere to open
// - OpenOnArrow .................... single-click on arrow to open
// - OpenOnDoubleClick|OpenOnArrow .. single-click on arrow or double-click anywhere to open
- ImGuiButtonFlags button_flags = ImGuiButtonFlags_NoKeyModifiers;
+ ImGuiButtonFlags button_flags = 0;
if (flags & ImGuiTreeNodeFlags_AllowItemOverlap)
button_flags |= ImGuiButtonFlags_AllowItemOverlap;
if (flags & ImGuiTreeNodeFlags_OpenOnDoubleClick)
@@ -5277,6 +5277,15 @@
if (!is_leaf)
button_flags |= ImGuiButtonFlags_PressedOnDragDropHold;
+ // We allow clicking on the arrow section with keyboard modifiers held, in order to easily
+ // allow browsing a tree while preserving selection with code implementing multi-selection patterns.
+ // When clicking on the rest of the tree node we always disallow keyboard modifiers.
+ const float hit_padding_x = style.TouchExtraPadding.x;
+ const float arrow_hit_x1 = (text_pos.x - text_offset_x) - hit_padding_x;
+ const float arrow_hit_x2 = (text_pos.x - text_offset_x) + (g.FontSize + padding.x * 2.0f) + hit_padding_x;
+ if (window != g.HoveredWindow || !(g.IO.MousePos.x >= arrow_hit_x1 && g.IO.MousePos.x < arrow_hit_x2))
+ button_flags |= ImGuiButtonFlags_NoKeyModifiers;
+
bool selected = (flags & ImGuiTreeNodeFlags_Selected) != 0;
const bool was_selected = selected;
@@ -5287,13 +5296,10 @@
{
if (pressed)
{
- const float hit_padding_x = style.TouchExtraPadding.x;
- const float arrow_hit_x1 = (text_pos.x - text_offset_x) - hit_padding_x;
- const float arrow_hit_x2 = (text_pos.x - text_offset_x) + (g.FontSize + padding.x * 2.0f) + hit_padding_x;
- if (flags & ImGuiTreeNodeFlags_OpenOnArrow)
- toggled |= (g.IO.MousePos.x >= arrow_hit_x1 && g.IO.MousePos.x < arrow_hit_x2) && (!g.NavDisableMouseHover); // Lightweight equivalent of IsMouseHoveringRect() since ButtonBehavior() already did the job
if ((flags & (ImGuiTreeNodeFlags_OpenOnArrow | ImGuiTreeNodeFlags_OpenOnDoubleClick)) == 0 || (g.NavActivateId == id))
toggled = true;
+ if (flags & ImGuiTreeNodeFlags_OpenOnArrow)
+ toggled |= (g.IO.MousePos.x >= arrow_hit_x1 && g.IO.MousePos.x < arrow_hit_x2) && (!g.NavDisableMouseHover); // Lightweight equivalent of IsMouseHoveringRect() since ButtonBehavior() already did the job
if ((flags & ImGuiTreeNodeFlags_OpenOnDoubleClick) && g.IO.MouseDoubleClicked[0])
toggled = true;
if (g.DragDropActive && is_open) // When using Drag and Drop "hold to open" we keep the node highlighted after opening, but never close it again.
