TCustomDBGrid.DoPrepareCanvas procedure
Prepares the canvas and signals the OnPrepareCanvas event handler.
Declaration
procedure DoPrepareCanvas(aCol: Integer; aRow: Integer;
aState: TGridDrawState); overrideArguments
aCol | Column number for the operation. |
aRow | Row number for the operation. |
aState | Drawing state for the operation. |
Description
DoPrepareCanvas is an overridden procedure used to prepare the
Canvas to draw a cell in the grid control. DoPrepareCanvas applies to data
cells and performs no actions in the method when aRow refers to a fixed row
in the control. In addition, DoPrepareCanvas applies only when DefaultDrawing
contains
False. No actions are performed in the method when
DefaultDrawing is enabled.
DoPrepareCanvas calls GetSelectedState to determine if the Canvas is updated with brush and font colors used to draw in the specified state. DoPrepareCanvas signals the OnPrepareCanvas event handler (when assigned) using the specified column number and drawing state.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.