Demo: Added simple item reordering demo in Widgets -> Drag and Drop section. (#2823, #143) [@rokups]
diff --git a/docs/CHANGELOG.txt b/docs/CHANGELOG.txt
index e1cd2ad..64bbe6b 100644
--- a/docs/CHANGELOG.txt
+++ b/docs/CHANGELOG.txt
@@ -40,6 +40,7 @@
- InputText, Nav: Fixed Home/End key broken when activating Keyboard Navigation. (#787)
- TreeNode: Fixed combination of ImGuiTreeNodeFlags_SpanFullWidth and ImGuiTreeNodeFlags_OpenOnArrow
incorrectly locating the arrow hit position to the left of the frame. (#2451, #2438, #1897)
+- Demo: Added simple item reordering demo in Widgets -> Drag and Drop section. (#2823, #143) [@rokups]
-----------------------------------------------------------------------
diff --git a/imgui_demo.cpp b/imgui_demo.cpp
index 036d906..0eeec98 100644
--- a/imgui_demo.cpp
+++ b/imgui_demo.cpp
@@ -1506,24 +1506,21 @@
if (ImGui::TreeNode("Drag and Drop"))
{
+ if (ImGui::TreeNode("Drag and drop in standard widgets"))
{
// ColorEdit widgets automatically act as drag source and drag target.
// They are using standardized payload strings IMGUI_PAYLOAD_TYPE_COLOR_3F and IMGUI_PAYLOAD_TYPE_COLOR_4F to allow your own widgets
// to use colors in their drag and drop interaction. Also see the demo in Color Picker -> Palette demo.
- ImGui::BulletText("Drag and drop in standard widgets");
- ImGui::SameLine();
HelpMarker("You can drag from the colored squares.");
- ImGui::Indent();
- static float col1[3] = { 1.0f,0.0f,0.2f };
- static float col2[4] = { 0.4f,0.7f,0.0f,0.5f };
+ static float col1[3] = { 1.0f, 0.0f, 0.2f };
+ static float col2[4] = { 0.4f, 0.7f, 0.0f, 0.5f };
ImGui::ColorEdit3("color 1", col1);
ImGui::ColorEdit4("color 2", col2);
- ImGui::Unindent();
+ ImGui::TreePop();
}
+ if (ImGui::TreeNode("Drag and drop to copy/swap items"))
{
- ImGui::BulletText("Drag and drop to copy/swap items");
- ImGui::Indent();
enum Mode
{
Mode_Copy,
@@ -1577,7 +1574,31 @@
}
ImGui::PopID();
}
- ImGui::Unindent();
+ ImGui::TreePop();
+ }
+
+ if (ImGui::TreeNode("Drag to reorder items (simple)"))
+ {
+ // Simple reordering
+ HelpMarker("We don't use the drag and drop api at all here! Instead we query when the item is held but not hovered, and order items accordingly.");
+ static const char* item_names[] = { "Item One", "Item Two", "Item Three", "Item Four", "Item Five" };
+ for (int n = 0; n < IM_ARRAYSIZE(item_names); n++)
+ {
+ const char* item = item_names[n];
+ ImGui::Selectable(item);
+
+ if (ImGui::IsItemActive() && !ImGui::IsItemHovered())
+ {
+ int n_next = n + (ImGui::GetMouseDragDelta(0).y < 0.f ? -1 : 1);
+ if (n_next >= 0 && n_next < IM_ARRAYSIZE(item_names))
+ {
+ item_names[n] = item_names[n_next];
+ item_names[n_next] = item;
+ ImGui::ResetMouseDragDelta();
+ }
+ }
+ }
+ ImGui::TreePop();
}
ImGui::TreePop();
@@ -1607,10 +1628,10 @@
if (item_type == 10){ ret = ImGui::TreeNodeEx("ITEM: TreeNode w/ ImGuiTreeNodeFlags_OpenOnDoubleClick", ImGuiTreeNodeFlags_OpenOnDoubleClick | ImGuiTreeNodeFlags_NoTreePushOnOpen); } // Testing tree node with ImGuiButtonFlags_PressedOnDoubleClick button policy.
if (item_type == 11){ const char* items[] = { "Apple", "Banana", "Cherry", "Kiwi" }; static int current = 1; ret = ImGui::ListBox("ITEM: ListBox", ¤t, items, IM_ARRAYSIZE(items), IM_ARRAYSIZE(items)); }
- // Display the value of IsItemHovered() and other common item state functions.
+ // Display the value of IsItemHovered() and other common item state functions.
// Note that the ImGuiHoveredFlags_XXX flags can be combined.
- // Because BulletText is an item itself and that would affect the output of IsItemXXX functions,
- // we query every state in a single call to avoid storing them and to simplify the code
+ // Because BulletText is an item itself and that would affect the output of IsItemXXX functions,
+ // we query every state in a single call to avoid storing them and to simplify the code
ImGui::BulletText(
"Return value = %d\n"
"IsItemFocused() = %d\n"
@@ -1653,7 +1674,7 @@
if (embed_all_inside_a_child_window)
ImGui::BeginChild("outer_child", ImVec2(0, ImGui::GetFontSize() * 20), true);
- // Testing IsWindowFocused() function with its various flags.
+ // Testing IsWindowFocused() function with its various flags.
// Note that the ImGuiFocusedFlags_XXX flags can be combined.
ImGui::BulletText(
"IsWindowFocused() = %d\n"
