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DropShadower: Check for deletion after calling isWindowOnCurrentVirtualDesktop()

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This commit is contained in:
ed 2021-12-01 12:46:06 +00:00
parent 3e542f3465
commit 1059f7b022
2 changed files with 8 additions and 0 deletions
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7
modules/juce_gui_basics/misc/juce_DropShadower.cpp
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@ -157,9 +157,16 @@ private:
void timerCallback() override
{
WeakReference<DropShadower> deletionChecker { static_cast<DropShadower*> (listener) };
const auto wasOnVirtualDesktop = std::exchange (isOnVirtualDesktop,
isWindowOnCurrentVirtualDesktop (root->getWindowHandle()));
// on Windows, isWindowOnCurrentVirtualDesktop() may cause synchronous messages to be dispatched
// to the HWND so we need to check if the shadower is still valid after calling
if (deletionChecker == nullptr)
return;
if (isOnVirtualDesktop != wasOnVirtualDesktop)
listener->componentVisibilityChanged (*root);
}

1
modules/juce_gui_basics/misc/juce_DropShadower.h
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@ -79,6 +79,7 @@ private:
std::unique_ptr<ParentVisibilityChangedListener> visibilityChangedListener;
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (DropShadower)
JUCE_DECLARE_WEAK_REFERENCEABLE (DropShadower)
};
} // namespace juce