[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index]

Reference for unit 'Controls' (#lcl)

TControlCanvas

The base class for the canvas property of several graphic controls, such as TGraphicControl and TCustomControl

Declaration

Source position: controls.pp line 251

`type TControlCanvas = class(TCanvas)`
`protected`
`procedure CreateHandle; override;`		`CreateHandle` - greates a new Handle for the Canvas
`function GetDefaultColor(); override;`
`public`
`constructor Create;`		`Create` - constructor for TControlCanvas: calls inherited `Create` then initialises local variables to show an empty control
`destructor Destroy; override;`		`Destroy` - destructor for `TControlCanvas`: frees handle and calls inherited `Destroy`
`procedure FreeHandle; override;`		`FreeHandle` - release a Handle
`function ControlIsPainting;`
`property Control: TControl; [rw]`		The Control object for which this is the Canvas
`end;`

`TControlCanvas`		The base class for the canvas property of several graphic controls, such as TGraphicControl and TCustomControl
\|
`TCanvas`		`TCanvas` - where most of the drawing is performed
\|
`TFPCustomCanvas`
\|
`TPersistent`
\|
`TObject`

TGraphicControl		`TGraphicControl` is the base class for all lightweight controls.
TCustomControl		`TCustomControl` - a base class for many window controls
TCanvas		`TCanvas` - where most of the drawing is performed