juce_ComponentMovementWatcher.h

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 /*
  ==============================================================================
 
   This file is part of the JUCE library.
   Copyright (c) 2022 - Raw Material Software Limited
 
   JUCE is an open source library subject to commercial or open-source
   licensing.
 
   By using JUCE, you agree to the terms of both the JUCE 7 End-User License
   Agreement and JUCE Privacy Policy.
 
   End User License Agreement: www.juce.com/juce-7-licence
   Privacy Policy: www.juce.com/juce-privacy-policy
 
   Or: You may also use this code under the terms of the GPL v3 (see
   www.gnu.org/licenses).
 
   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.
 
  ==============================================================================
*/
 
namespace juce
{
 
//==============================================================================
class JUCE_API  ComponentMovementWatcher    : public ComponentListener
{
public:
    //==============================================================================
    ComponentMovementWatcher (Component* componentToWatch);
 
    ~ComponentMovementWatcher() override;
 
    //==============================================================================
    virtual void componentMovedOrResized (bool wasMoved, bool wasResized) = 0;
 
    virtual void componentPeerChanged() = 0;
 
    virtual void componentVisibilityChanged() = 0;
 
    Component* getComponent() const noexcept         { return component.get(); }
 
    //==============================================================================
    void componentParentHierarchyChanged (Component&) override;
    void componentMovedOrResized (Component&, bool wasMoved, bool wasResized) override;
    void componentBeingDeleted (Component&) override;
    void componentVisibilityChanged (Component&) override;
 
private:
    //==============================================================================
    WeakReference<Component> component;
    uint32 lastPeerID = 0;
    Array<Component*> registeredParentComps;
    bool reentrant = false, wasShowing;
    Rectangle<int> lastBounds;
 
    void unregister();
    void registerWithParentComps();
 
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ComponentMovementWatcher)
};
 
} // namespace juce