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Drag and Drop: Fixed using BeginDragDropSource() within a Begin()/BeginChild() that returned false. (#4515) + BeginDragDropTarget()

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Note how 79ae6d3b adedd a SkipItems test in BeginDragDropTargetCustom() only.
Catching this similar to work needed to neatly represent the error in #4375 #4158, #4008, #2562
This commit is contained in:
ocornut 2021-09-06 20:42:40 +02:00
parent bd6c9e99fc
commit 607ad8c949
2 changed files with 7 additions and 7 deletions
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1
docs/CHANGELOG.txt
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@ -52,6 +52,7 @@ Other Changes:
- Nav: Fixed toggling menu layer with Alt or exiting menu layer with Esc not moving mouse when
the NavEnableSetMousePos config flag is set.
- Menus: adjust closing logic to accomodate for varying font size and dpi.
- Drag and Drop: Fixed using BeginDragDropSource() inside a BeginChild() that returned false. (#4515)
- PlotHistogram: Fixed zero-line position when manually specifying min<0 and max>0. (#4349) [@filippocrocchini]
- IO: Added 'io.WantCaptureMouseUnlessPopupClose' alternative to `io.WantCaptureMouse'. (#4480)
This allows apps to receive the click on void when that click is used to close popup (by default,

13
imgui.cpp
View File

@ -7813,6 +7813,7 @@ ImVec2 ImGui::GetWindowContentRegionMax()
// Lock horizontal starting position + capture group bounding box into one "item" (so you can use IsItemHovered() or layout primitives such as SameLine() on whole group, etc.)
// Groups are currently a mishmash of functionalities which should perhaps be clarified and separated.
// FIXME-OPT: Could we safely early out on ->SkipItems?
void ImGui::BeginGroup()
{
ImGuiContext& g = *GImGui;
@ -9978,14 +9979,16 @@ bool ImGui::BeginDragDropSource(ImGuiDragDropFlags flags)
return false;
if (g.ActiveIdMouseButton != -1)
mouse_button = g.ActiveIdMouseButton;
if (g.IO.MouseDown[mouse_button] == false)
if (g.IO.MouseDown[mouse_button] == false || window->SkipItems)
return false;
g.ActiveIdAllowOverlap = false;
}
else
{
// Uncommon path: items without ID
if (g.IO.MouseDown[mouse_button] == false)
if (g.IO.MouseDown[mouse_button] == false || window->SkipItems)
return false;
if ((g.LastItemData.StatusFlags & ImGuiItemStatusFlags_HoveredRect) == 0 && (g.ActiveId == 0 || g.ActiveIdWindow != window))
return false;
// If you want to use BeginDragDropSource() on an item with no unique identifier for interaction, such as Text() or Image(), you need to:
@ -9996,10 +9999,6 @@ bool ImGui::BeginDragDropSource(ImGuiDragDropFlags flags)
return false;
}
// Early out
if ((g.LastItemData.StatusFlags & ImGuiItemStatusFlags_HoveredRect) == 0 && (g.ActiveId == 0 || g.ActiveIdWindow != window))
return false;
// Magic fallback (=somehow reprehensible) to handle items with no assigned ID, e.g. Text(), Image()
// We build a throwaway ID based on current ID stack + relative AABB of items in window.
// THE IDENTIFIER WON'T SURVIVE ANY REPOSITIONING OF THE WIDGET, so if your widget moves your dragging operation will be canceled.
@ -10165,7 +10164,7 @@ bool ImGui::BeginDragDropTarget()
if (!(g.LastItemData.StatusFlags & ImGuiItemStatusFlags_HoveredRect))
return false;
ImGuiWindow* hovered_window = g.HoveredWindowUnderMovingWindow;
if (hovered_window == NULL || window->RootWindow != hovered_window->RootWindow)
if (hovered_window == NULL || window->RootWindow != hovered_window->RootWindow || window->SkipItems)
return false;
const ImRect& display_rect = (g.LastItemData.StatusFlags & ImGuiItemStatusFlags_HasDisplayRect) ? g.LastItemData.DisplayRect : g.LastItemData.Rect;