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TNotifiablePersistent
Hierarchy
TPersistent
Description
TNotifiablePersistent extends the standard TPersistent class with change notification events. That is, it provides methods and events allowing its descendants to issue notification on their changes. For example, TBitmap32 uses OnChange to notify its container (usually TImage32 or TBitmapLayer) that it was modified and its data has to be repainted to the screen. TNotifiablePersistent, however, does not use or implement automatic change notification itself. This is done in descendants.
Reference
| Properties | Methods | Events |
|---|---|---|
| In TNotifiablePersistent: | ||
| UpdateCount | BeginUpdate | OnChange |
| Changed | ||
| Create | ||
| Destroy | ||
| EndUpdate | ||
See Also
TBitmap32, TBitmapLayer, TImage32
Copyright ©2000-2007 Alex Denisov and Contributors - Graphics32 v1.8.3 - Build on 4-March-2007