JCL Help:TJclThreadPersistent
JCL Help: TJclThreadPersistent Class
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TJclThreadPersistent
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TJclCustomMap
Summary
Ancestor class for TJclBitmap32.
Pascal
public TJclThreadPersistent = class(TPersistent);
Description
TJclThreadPersistent extends the standard TPersistent class with the thread-safe locking and declares change notification events.
The locking provides means of synchronization of simultaneous access to the same resource in applications with multiple threads and it works similar to that in TCanvas class. For additional information, see Delphi documentation on TCanvas.
This class also declares change notification abilities. That is, it provides methods and events allowing it descendants to issue notification on their changes. For example, TJclBitmap32 uses OnChange to notify its container that it was modified and its data has to be repainted to the screen. TJclThreadPersistent, however, does not use or implement automatic change notification itself. This is done in descendants.
About
Unit
Donator
Alex Denissov
Platforms
VCL
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