73 lines
2.4 KiB
C
73 lines
2.4 KiB
C
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/*
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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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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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