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67 lines
2.5 KiB
C++
67 lines
2.5 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library - "Jules' Utility Class Extensions"
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Copyright 2004-11 by Raw Material Software Ltd.
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------------------------------------------------------------------------------
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JUCE can be redistributed and/or modified under the terms of the GNU General
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Public License (Version 2), as published by the Free Software Foundation.
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A copy of the license is included in the JUCE distribution, or can be found
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online at www.gnu.org/licenses.
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JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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------------------------------------------------------------------------------
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To release a closed-source product which uses JUCE, commercial licenses are
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available: visit www.rawmaterialsoftware.com/juce for more information.
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==============================================================================
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*/
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#ifndef __JUCE_CACHEDCOMPONENTIMAGE_JUCEHEADER__
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#define __JUCE_CACHEDCOMPONENTIMAGE_JUCEHEADER__
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class Component;
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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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*/
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class JUCE_API CachedComponentImage
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{
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public:
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CachedComponentImage() noexcept {}
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virtual ~CachedComponentImage() {}
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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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virtual void invalidateAll() = 0;
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/** Invalidates a section of the cached image data. */
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virtual void 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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#endif // __JUCE_CACHEDCOMPONENTIMAGE_JUCEHEADER__
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