TCustomControl.Canvas property

Declaration

property Canvas: TCanvas read FCanvas write FCanvas;

Description

Canvas is a TCanvas property which contains the drawing surface for the control. Resources for the property are allocated in the constructor for the class instance. A TControlCanvas descendant is created and assigned to the member for the property. The Handle for the Canvas is updated when PaintWindow is called for a specific device context.

Changing values in the Font or Color properties causes settings in Canvas to be updated. A new value assigned to Font is also assigned to the Canvas in the control, and includes the PixelsPerInch setting for the Font. A new value assigned to Color is applied to the Brush in Canvas. A value assigned to BorderStyle must be handled in the routine assigned to the OnPaint event handler.

See also

• Canvas
• OnPaint
• BorderStyle
• Font
• TControlCanvas
• TCanvas