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81 lines
3 KiB
C++
81 lines
3 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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/**
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Base class used internally for structures that can store cached images of
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component state.
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Most people are unlikely to ever need to know about this class - it's really
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only for power-users!
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@see Component::setCachedComponentImage
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@tags{GUI}
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*/
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class JUCE_API CachedComponentImage
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{
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public:
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CachedComponentImage() = default;
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virtual ~CachedComponentImage() = default;
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//==============================================================================
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/** Called as part of the parent component's paint method, this must draw
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the given component into the target graphics context, using the cached
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version where possible.
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*/
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virtual void paint (Graphics&) = 0;
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/** Invalidates all cached image data.
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@returns true if the peer should also be repainted, or false if this object
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handles all repaint work internally.
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*/
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virtual bool invalidateAll() = 0;
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/** Invalidates a section of the cached image data.
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@returns true if the peer should also be repainted, or false if this object
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handles all repaint work internally.
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*/
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virtual bool invalidate (const Rectangle<int>& area) = 0;
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/** Called to indicate that the component is no longer active, so
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any cached data should be released if possible.
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*/
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virtual void releaseResources() = 0;
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};
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} // namespace juce
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