TCustomGrid.OnPrepareCanvas property
Event handler signalled to prepare the Canvas to draw the grid.
Declaration
property OnPrepareCanvas: TOnPrepareCanvasEvent read FOnPrepareCanvas write FOnPrepareCanvas;Description
OnPrepareCanvas is a
TOnPrepareCanvasEvent property
with the event handler signalled to configure the control
Canvas
to draw a cell at specified coordinates using a specific state.
OnPrepareCanvas is signalled (when assigned) from the
DoPrepareCanvas method.
OnPrepareCanvas allows the Pen, Brush, Font, and Color defaults assigned in PrepareCanvas to be overridden for a specified column and row to use a specific TGridDrawState value. It offers the last chance to change the appearance of a cell before it is drawn in the DrawCell or ShowCellHintWindow methods.
Use OnDrawCell (implemented in the TCustomDrawGrid descendant) to override the actions performed in the DefaultDrawCell method when DefaultDrawing is enabled.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.