API:Vcl.Controls.TControlCanvas
Delphi
TControlCanvas = class(TCanvas)
C++
class PASCALIMPLEMENTATION TControlCanvas : public Vcl::Graphics::TCanvas
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| class | public | Vcl.Controls.pas Vcl.Controls.hpp |
Vcl.Controls | Vcl.Controls |
Description
TCanvas provides an abstract drawing space for objects that must render their own images.
Vcl.Controls.TControlCanvas inherits from Vcl.Graphics.TCanvas. All content below this line refers to Vcl.Graphics.TCanvas.
TCanvas provides an abstract drawing space for objects that must render their own images.
Use TCanvas as a drawing surface for objects that draw an image of themselves. Standard window controls such as edit controls or list boxes do not require a canvas, as they are drawn by the system.
TCanvas provides properties, events, and methods that assist in creating an image by:
- Specifying the type of brush, pen, and font to use.
- Drawing and filling a variety of shapes and lines.
- Writing text.
- Rendering graphic images.
- Enabling a response to changes in the current image.
TCanvas has two descendants, TControlCanvas and TMetafileCanvas, which assist in drawing images of controls and in creating metafile images for objects.