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Viewports: reimplement IsViewportAbove() using ParentViewport chain. (#8948)

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ocornut
2025-09-30 18:31:00 +02:00
parent 3563f1e270
commit 6fd4cf8e49
1 changed files with 15 additions and 2 deletions
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17
imgui.cpp
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@@ -16337,10 +16337,23 @@ static bool ImGui::GetWindowAlwaysWantOwnViewport(ImGuiWindow* window)
// Heuristic, see #8948: depends on how backends handle OS-level parenting.
// FIXME-VIEWPORTS: if ImGuiBackendFlags_HasParentViewportId if set, we should consider ->ParentViewportId as primary source of truth.
static bool IsViewportAbove(ImGuiViewportP* potential_above, ImGuiViewportP* potential_below)
{
if (potential_above->LastFocusedStampCount > potential_below->LastFocusedStampCount || potential_above->ParentViewportId == potential_below->ID) // FIXME: Should follow the ParentViewportId list.
// If ImGuiBackendFlags_HasParentViewportId if set, ->ParentViewport chain should be accurate.
ImGuiContext& g = *GImGui;
if (g.IO.BackendFlags & ImGuiBackendFlags_HasParentViewportId)
{
for (ImGuiViewport* v = potential_above; v != NULL && v->ParentViewport; v = v->ParentViewport)
if (v->ParentViewport == potential_below)
return true;
}
else
{
if (potential_above->ParentViewport == potential_below)
return true;
}
if (potential_above->LastFocusedStampCount > potential_below->LastFocusedStampCount)
return true;
return false;
}