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Fixed crash when appending with BeginMainMenuBar() more than once and no other window are showing. (#2567) + comments

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This commit is contained in:
omar 2019-05-21 12:18:34 +02:00
parent 392ab08580
commit 882d2c3aea
3 changed files with 9 additions and 4 deletions
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1
docs/CHANGELOG.txt
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@ -46,6 +46,7 @@ Other Changes:
It wasn't much of a problem because we typically use the return value instead of IsItemEdited() here.
- Fixed uses of IsItemDeactivated(), IsItemDeactivatedAfterEdit() on multi-components widgets and
after EndGroup(). (#2550, #1875)
- Fixed crash when appending with BeginMainMenuBar() more than once and no other window are showing. (#2567)
- Scrollbar: Very minor bounding box adjustment to cope with various border size.
- ImFontAtlas: FreeType: Added RasterizerFlags::Monochrome flag to disable font anti-aliasing. (#2545)
Combine with RasterizerFlags::MonoHinting for best results.

10
imgui.cpp
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@ -2831,9 +2831,13 @@ bool ImGui::ItemAdd(const ImRect& bb, ImGuiID id, const ImRect* nav_bb_arg)
{
// Navigation processing runs prior to clipping early-out
// (a) So that NavInitRequest can be honored, for newly opened windows to select a default widget
// (b) So that we can scroll up/down past clipped items. This adds a small O(N) cost to regular navigation requests unfortunately, but it is still limited to one window.
// it may not scale very well for windows with ten of thousands of item, but at least NavMoveRequest is only set on user interaction, aka maximum once a frame.
// We could early out with "if (is_clipped && !g.NavInitRequest) return false;" but when we wouldn't be able to reach unclipped widgets. This would work if user had explicit scrolling control (e.g. mapped on a stick)
// (b) So that we can scroll up/down past clipped items. This adds a small O(N) cost to regular navigation requests
// unfortunately, but it is still limited to one window. It may not scale very well for windows with ten of
// thousands of item, but at least NavMoveRequest is only set on user interaction, aka maximum once a frame.
// We could early out with "if (is_clipped && !g.NavInitRequest) return false;" but when we wouldn't be able
// to reach unclipped widgets. This would work if user had explicit scrolling control (e.g. mapped on a stick).
// We intentionally don't check if g.NavWindow != NULL because g.NavAnyRequest should only be set when it is non null.
// If we crash on a NULL g.NavWindow we need to fix the bug elsewhere.
window->DC.NavLayerActiveMaskNext |= window->DC.NavLayerCurrentMask;
if (g.NavId == id || g.NavAnyRequest)
if (g.NavWindow->RootWindowForNav == window->RootWindowForNav)

2
imgui_widgets.cpp
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@ -5850,7 +5850,7 @@ void ImGui::EndMainMenuBar()
// When the user has left the menu layer (typically: closed menus through activation of an item), we restore focus to the previous window
// FIXME: With this strategy we won't be able to restore a NULL focus.
ImGuiContext& g = *GImGui;
if (g.CurrentWindow == g.NavWindow && g.NavLayer == 0)
if (g.CurrentWindow == g.NavWindow && g.NavLayer == 0 && !g.NavAnyRequest)
FocusTopMostWindowUnderOne(g.NavWindow, NULL);
End();