isReset - method of the CanvasCtxExt object
Detects whether the drawing area contains graphic content from previous drawing.
- The drawing area has been reset (erased) and it is necessary to draw everything again in the onDraw
- The drawing area has not been erased after last drawing so by calling the pEvent.GetCtx
(1) method in the onDraw
event it is possible to draw into the are with original graphic content and add new content to it.
b = pEvent.CtxExt.isReset();