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85 lines
3.2 KiB
C++
85 lines
3.2 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE framework.
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Copyright (c) Raw Material Software Limited
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JUCE is an open source framework subject to commercial or open source
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licensing.
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By downloading, installing, or using the JUCE framework, or combining the
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JUCE framework with any other source code, object code, content or any other
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copyrightable work, you agree to the terms of the JUCE End User Licence
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Agreement, and all incorporated terms including the JUCE Privacy Policy and
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the JUCE Website Terms of Service, as applicable, which will bind you. If you
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do not agree to the terms of these agreements, we will not license the JUCE
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framework to you, and you must discontinue the installation or download
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process and cease use of the JUCE framework.
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JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
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JUCE Privacy Policy: https://juce.com/juce-privacy-policy
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JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/
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Or:
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You may also use this code under the terms of the AGPLv3:
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https://www.gnu.org/licenses/agpl-3.0.en.html
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THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
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WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
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MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE 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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Helper class to synchronise Component updates to the vertical blank event of the display that
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the Component is presented on. This is useful when animating the Component's contents.
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@tags{Animations}
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*/
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class JUCE_API VBlankAttachment final : public ComponentPeer::VBlankListener,
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public ComponentListener
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{
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public:
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/** Default constructor for creating an empty object. */
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VBlankAttachment() = default;
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/** Constructor. Creates an attachment that will call the passed in function at every vertical
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blank event of the display that the passed in Component is currently visible on.
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The Component must be valid for the entire lifetime of the VBlankAttachment.
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*/
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VBlankAttachment (Component* c, std::function<void()> callbackIn);
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VBlankAttachment (VBlankAttachment&& other);
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VBlankAttachment& operator= (VBlankAttachment&& other);
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/** Destructor. */
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~VBlankAttachment() override;
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/** Returns true for a default constructed object. */
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bool isEmpty() const { return owner == nullptr; }
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//==============================================================================
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void onVBlank() override;
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//==============================================================================
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void componentParentHierarchyChanged (Component&) override;
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private:
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void updateOwner();
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void updatePeer();
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void cleanup();
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Component* owner = nullptr;
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Component* lastOwner = nullptr;
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std::function<void()> callback;
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ComponentPeer* lastPeer = nullptr;
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JUCE_DECLARE_NON_COPYABLE (VBlankAttachment)
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};
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} // namespace juce
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