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TreeNode: Fixed bug where BeginDragDropSource() failed when the _OpenOnDoubleClick flag is set. Added basic demo code. (Amend 05420ea)

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This commit is contained in:
omar 2020-04-15 12:31:51 +02:00
parent e8c986b34e
commit 54b38d88f7
3 changed files with 26 additions and 1 deletions
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10
docs/CHANGELOG.txt
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@ -34,11 +34,21 @@ HOW TO UPDATE?
VERSION 1.77 WIP (In Progress)
-----------------------------------------------------------------------
Breaking Changes:
Other Changes:
- TreeNode: Fixed bug where BeginDragDropSource() failed when the _OpenOnDoubleClick flag is
enabled (bug introduced in 1.76, but pre-1.76 it would also fail unless the _OpenOnArrow
flag was also set, and _OpenOnArrow is frequently set along with _OpenOnDoubleClick).
-----------------------------------------------------------------------
VERSION 1.76 (Released 2020-04-12)
-----------------------------------------------------------------------
Decorated log: https://github.com/ocornut/imgui/releases/tag/v1.76
Other Changes:
- Drag and Drop, Nav: Disabling navigation arrow keys when drag and drop is active. In the docking

14
imgui_demo.cpp
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@ -641,11 +641,13 @@ static void ShowDemoWindowWidgets()
HelpMarker("This is a more typical looking tree with selectable nodes.\nClick to select, CTRL+Click to toggle, click on arrows or double-click to open.");
static ImGuiTreeNodeFlags base_flags = ImGuiTreeNodeFlags_OpenOnArrow | ImGuiTreeNodeFlags_OpenOnDoubleClick | ImGuiTreeNodeFlags_SpanAvailWidth;
static bool align_label_with_current_x_position = false;
static bool test_drag_and_drop = false;
ImGui::CheckboxFlags("ImGuiTreeNodeFlags_OpenOnArrow", (unsigned int*)&base_flags, ImGuiTreeNodeFlags_OpenOnArrow);
ImGui::CheckboxFlags("ImGuiTreeNodeFlags_OpenOnDoubleClick", (unsigned int*)&base_flags, ImGuiTreeNodeFlags_OpenOnDoubleClick);
ImGui::CheckboxFlags("ImGuiTreeNodeFlags_SpanAvailWidth", (unsigned int*)&base_flags, ImGuiTreeNodeFlags_SpanAvailWidth); ImGui::SameLine(); HelpMarker("Extend hit area to all available width instead of allowing more items to be layed out after the node.");
ImGui::CheckboxFlags("ImGuiTreeNodeFlags_SpanFullWidth", (unsigned int*)&base_flags, ImGuiTreeNodeFlags_SpanFullWidth);
ImGui::Checkbox("Align label with current X position", &align_label_with_current_x_position);
ImGui::Checkbox("Test tree node as drag source", &test_drag_and_drop);
ImGui::Text("Hello!");
if (align_label_with_current_x_position)
ImGui::Unindent(ImGui::GetTreeNodeToLabelSpacing());
@ -665,6 +667,12 @@ static void ShowDemoWindowWidgets()
bool node_open = ImGui::TreeNodeEx((void*)(intptr_t)i, node_flags, "Selectable Node %d", i);
if (ImGui::IsItemClicked())
node_clicked = i;
if (test_drag_and_drop && ImGui::BeginDragDropSource())
{
ImGui::SetDragDropPayload("_TREENODE", NULL, 0);
ImGui::Text("This is a drag and drop source");
ImGui::EndDragDropSource();
}
if (node_open)
{
ImGui::BulletText("Blah blah\nBlah Blah");
@ -680,6 +688,12 @@ static void ShowDemoWindowWidgets()
ImGui::TreeNodeEx((void*)(intptr_t)i, node_flags, "Selectable Leaf %d", i);
if (ImGui::IsItemClicked())
node_clicked = i;
if (test_drag_and_drop && ImGui::BeginDragDropSource())
{
ImGui::SetDragDropPayload("_TREENODE", NULL, 0);
ImGui::Text("This is a drag and drop source");
ImGui::EndDragDropSource();
}
}
}
if (node_clicked != -1)

3
imgui_widgets.cpp
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@ -5360,10 +5360,11 @@ bool ImGui::TreeNodeBehavior(ImGuiID id, ImGuiTreeNodeFlags flags, const char* l
// It is rather standard that arrow click react on Down rather than Up and we'd be tempted to make it the default
// (by removing the _OpenOnArrow test below), however this would have a perhaps surprising effect on CollapsingHeader()?
// So right now we are making this optional. May evolve later.
// We set ImGuiButtonFlags_PressedOnClickRelease on OpenOnDoubleClick because we want the item to be active on the initial MouseDown in order for drag and drop to work.
if (is_mouse_x_over_arrow && (flags & ImGuiTreeNodeFlags_OpenOnArrow))
button_flags |= ImGuiButtonFlags_PressedOnClick;
else if (flags & ImGuiTreeNodeFlags_OpenOnDoubleClick)
button_flags |= ImGuiButtonFlags_PressedOnDoubleClick;
button_flags |= ImGuiButtonFlags_PressedOnClickRelease | ImGuiButtonFlags_PressedOnDoubleClick;
else
button_flags |= ImGuiButtonFlags_PressedOnClickRelease;