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|Home BasePack SDLBase Procedures and Functions DrawMarkOnCanvas|
|See also: CreateMarkAsBitMap, MarkAt (PolChart), MarkAt (RChart), MarkAt (Rot3D), MarkAt (SmithChart), OnScalesRendered, MaxCanvasMarks, TImageRequestEvent|
The method DrawMarkOnCanvas draws a mark on the canvas canv at the position (x,y). The position has to be specified in pixel coordinates (top/left is 0/0). The shape of the mark is defined by the parameter Mark:
DrawMarkOnCanvas can be used to draw on any canvas exactly the same marks as created by the methods MarkAt of the units RChart, Rot3D, and PolChart, or the OnImageReqest event of TThumbnails. It can be used to create, for example, a legend of data marks.
If the parameter mark is greater than MAXCANVASMARKS, a character corresponding to its ASCII code is displayed instead of a symbol. Digits can be drawn by setting mark to the codes 200..209 (200 = '0', 209 = '9').