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The width of the black area around the wheel.
Source position: fpg_colorwheel.pas line 69
published property TfpgColorWheel.MarginWidth: LongInt |
The margin is there so that when the cross hair is on the edge of the wheel, the complete cross hair can be drawn, without being clipped. It makes selecting colors on the edge of the colorwheel easier.
If the margin is set too large, the colorwheel will not be drawn / displayed.