Base class used internally for structures that can store cached images of component state.
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Base class used internally for structures that can store cached images of component state.
Most people are unlikely to ever need to know about this class - it's really only for power-users!
- See also
- Component::setCachedComponentImage
◆ CachedComponentImage()
| CachedComponentImage::CachedComponentImage |
( |
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default |
◆ ~CachedComponentImage()
| virtual CachedComponentImage::~CachedComponentImage |
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| ) |
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virtualdefault |
◆ paint()
| virtual void CachedComponentImage::paint |
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Graphics & |
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pure virtual |
Called as part of the parent component's paint method, this must draw the given component into the target graphics context, using the cached version where possible.
◆ invalidateAll()
| virtual bool CachedComponentImage::invalidateAll |
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pure virtual |
Invalidates all cached image data.
- Returns
- true if the peer should also be repainted, or false if this object handles all repaint work internally.
◆ invalidate()
| virtual bool CachedComponentImage::invalidate |
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const Rectangle< int > & |
area | ) |
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pure virtual |
Invalidates a section of the cached image data.
- Returns
- true if the peer should also be repainted, or false if this object handles all repaint work internally.
◆ releaseResources()
| virtual void CachedComponentImage::releaseResources |
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pure virtual |
Called to indicate that the component is no longer active, so any cached data should be released if possible.
The documentation for this class was generated from the following file:
