TCanvas.BrushChanging procedure
Implements the OnChanging event handler for the Brush on the canvas.
Declaration
procedure BrushChanging(ABrush: TObject); virtualArguments
ABrush | Not used in the current implementation of the method. |
Description
BrushChanging is assigned as the OnChanging event handler for the
Brush property in the constructor for the class instance. It allows the
canvas class to be notified and updated when a new brush is assigned to the
canvas.
BrushChanging ensures that both the Handle and the Brush for the canvas are valid. No actions are performed in the method if State does not contain the values csBrushValid and csHandleValid. It removes csBrushValid from the States property and reselects the handle for the Brush in the control.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.