TVirtualGrid.doDestroyItem procedure
Destroys an Item at the given Row and Column location.
Declaration
procedure doDestroyItem(Sender: TObject; Col: Integer; Row: Integer;
var Item: Pointer)Arguments
Sender | Column, row, or cell properties affected in the method. |
Col | Column number freed in the method. |
Row | Row number freed in the method. |
Item | Pointer to the column, row, or cell properties freed in the method. |
Description
Performs actions needed to free the Item at the specified column and row numbers.
Item is a
Pointer to the column/row properties for the
cell at the coordinates in
Col and
Row. No actions are
performed in the method when Item is unassigned (contains
Nil).
Sender contains the object instance for the column, row, or cell
affected in the method. Calls the
DisposeColRow method when Sender
is for a column or row array. Calls
DisposeCell when Sender
contains a pointer to another object class.
The value in Item is set to Nil prior to exiting from the method.
doDestroyItem is the default handler assigned to the OnDestroyItem
event handler for the cell, column and row arrays used in the virtual grid.
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.