TCustomGrid.CheckLimits procedure
Checks column and row limits for the specified cell.
Declaration
procedure CheckLimits(var aCol: Integer; var aRow: Integer)Arguments
aCol | Column number examined in the method. |
aRow | Row number examined in the method. |
Description
CheckLimits is a procedure used to constrain the specified cell
coordinates to the valid values for grid control.
ACol and
ARow contain the column and row numbers for a
cell in the grid control. CheckLimits ensures that the values represent a
valid, non-fixed cell in the grid control.
ACol must contain a value in the range 0..ColCount-1, and cannot be a
fixed column in the grid. The value in FixedCols is assigned to
ACol if it is less than the value in FixedCols.ColCount-1 is assigned
to ACol when it is larger than the upper limit.
ARow must contain a value in the range
0..RowCount-1, and
cannot be a fixed row in the grid. The value in
FixedRows is
assigned to ARow if it is less than the value in FixedRows.
RowCount-1
is assigned to ARow when it is larger than the upper limit.
CheckLimitsWithError is used when an exception is required for
invalid cell coordinates.
CheckLimits is used in the implementation of methods like
MoveNextSelectable and TryMoveSelection.
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.