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175de90c49
The issue was caused by DropShadower using the ComponentListener interface to listen to its target Component's changes and creating shadow Components only if the target was visible during the event callbacks. However it was possible that during the events the target was not yet visible because one of its parents was not visible. When the parent became visible it would not trigger a callback for the observed child component. The fix attaches a ComponentListener recursively to all parents starting from the target and responds to each componentVisibilityChanged() event.
83 lines
2.8 KiB
C++
83 lines
2.8 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2020 - Raw Material Software Limited
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JUCE is an open source library subject to commercial or open-source
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licensing.
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By using JUCE, you agree to the terms of both the JUCE 6 End-User License
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Agreement and JUCE Privacy Policy (both effective as of the 16th June 2020).
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End User License Agreement: www.juce.com/juce-6-licence
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Privacy Policy: www.juce.com/juce-privacy-policy
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Or: You may also use this code under the terms of the GPL v3 (see
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www.gnu.org/licenses).
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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//==============================================================================
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/**
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Adds a drop-shadow to a component.
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This object creates and manages a set of components which sit around a
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component, creating a gaussian shadow around it. The components will track
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the position of the component and if it's brought to the front they'll also
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follow this.
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For desktop windows you don't need to use this class directly - just
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set the Component::windowHasDropShadow flag when calling
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Component::addToDesktop(), and the system will create one of these if it's
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needed (which it obviously isn't on the Mac, for example).
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@tags{GUI}
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*/
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class JUCE_API DropShadower : private ComponentListener
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{
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public:
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//==============================================================================
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/** Creates a DropShadower. */
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DropShadower (const DropShadow& shadowType);
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/** Destructor. */
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~DropShadower() override;
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/** Attaches the DropShadower to the component you want to shadow. */
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void setOwner (Component* componentToFollow);
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private:
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//==============================================================================
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class ShadowWindow;
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WeakReference<Component> owner;
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OwnedArray<Component> shadowWindows;
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DropShadow shadow;
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bool reentrant = false;
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WeakReference<Component> lastParentComp;
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void componentMovedOrResized (Component&, bool, bool) override;
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void componentBroughtToFront (Component&) override;
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void componentChildrenChanged (Component&) override;
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void componentParentHierarchyChanged (Component&) override;
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void componentVisibilityChanged (Component&) override;
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void updateParent();
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void updateShadows();
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std::unique_ptr<ComponentListener> visibilityChangedListener;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (DropShadower)
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};
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} // namespace juce
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