TTMSFNCCustomTrackBarBeforeDrawThumbEvent Event Type
Event type fired before the thumb is drawn.
API unit family: TMSFNCTrackBar
Parameters
| Name | Description |
|---|---|
Sender |
Control that is drawing the thumb. |
AGraphics |
Graphics context used for custom drawing. |
ARect |
Thumb bounds in control coordinates. |
AValue |
Value represented by the thumb. |
AAllow |
Set to False to skip drawing the thumb. |
ADefaultDraw |
Set to False after custom drawing to prevent the default thumb rendering. |