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Drag and Drop: Fixed drop target highlight on items temporarily pushing a widened clip rect. (#7049, #4281, #3272)

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ocornut
2023-11-22 19:30:08 +01:00
parent 65a10410e3
commit bce4db00bc
4 changed files with 35 additions and 14 deletions
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10
imgui.cpp
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@ -12778,13 +12778,14 @@ bool ImGui::BeginDragDropTargetCustom(const ImRect& bb, ImGuiID id)
IM_ASSERT(g.DragDropWithinTarget == false);
g.DragDropTargetRect = bb;
g.DragDropTargetClipRect = window->ClipRect; // May want to be overriden by user depending on use case?
g.DragDropTargetId = id;
g.DragDropWithinTarget = true;
return true;
}
// We don't use BeginDragDropTargetCustom() and duplicate its code because:
// 1) we use LastItemRectHoveredRect which handles items that push a temporarily clip rectangle in their code. Calling BeginDragDropTargetCustom(LastItemRect) would not handle them.
// 1) we use LastItemData's ImGuiItemStatusFlags_HoveredRect which handles items that push a temporarily clip rectangle in their code. Calling BeginDragDropTargetCustom(LastItemRect) would not handle them.
// 2) and it's faster. as this code may be very frequently called, we want to early out as fast as we can.
// Also note how the HoveredWindow test is positioned differently in both functions (in both functions we optimize for the cheapest early out case)
bool ImGui::BeginDragDropTarget()
@ -12812,6 +12813,7 @@ bool ImGui::BeginDragDropTarget()
IM_ASSERT(g.DragDropWithinTarget == false);
g.DragDropTargetRect = display_rect;
g.DragDropTargetClipRect = (g.LastItemData.StatusFlags & ImGuiItemStatusFlags_HasClipRect) ? g.LastItemData.ClipRect : window->ClipRect;
g.DragDropTargetId = id;
g.DragDropWithinTarget = true;
return true;
@ -12849,7 +12851,7 @@ const ImGuiPayload* ImGui::AcceptDragDropPayload(const char* type, ImGuiDragDrop
payload.Preview = was_accepted_previously;
flags |= (g.DragDropSourceFlags & ImGuiDragDropFlags_AcceptNoDrawDefaultRect); // Source can also inhibit the preview (useful for external sources that live for 1 frame)
if (!(flags & ImGuiDragDropFlags_AcceptNoDrawDefaultRect) && payload.Preview)
RenderDragDropTargetRect(r);
RenderDragDropTargetRect(r, g.DragDropTargetClipRect);
g.DragDropAcceptFrameCount = g.FrameCount;
payload.Delivery = was_accepted_previously && !IsMouseDown(g.DragDropMouseButton); // For extern drag sources affecting OS window focus, it's easier to just test !IsMouseDown() instead of IsMouseReleased()
@ -12861,12 +12863,12 @@ const ImGuiPayload* ImGui::AcceptDragDropPayload(const char* type, ImGuiDragDrop
}
// FIXME-STYLE FIXME-DRAGDROP: Settle on a proper default visuals for drop target.
void ImGui::RenderDragDropTargetRect(const ImRect& bb)
void ImGui::RenderDragDropTargetRect(const ImRect& bb, const ImRect& item_clip_rect)
{
ImGuiContext& g = *GImGui;
ImGuiWindow* window = g.CurrentWindow;
ImRect bb_display = bb;
bb_display.ClipWith(window->ClipRect); // Clip THEN expand so we have a way to visualize that target is not entirely visible.
bb_display.ClipWith(item_clip_rect); // Clip THEN expand so we have a way to visualize that target is not entirely visible.
bb_display.Expand(3.5f);
bool push_clip_rect = !window->ClipRect.Contains(bb_display);
if (push_clip_rect)