Mega Code Archive
Optimal Cell Width of a StringGrid
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Title: Optimal Cell Width of a StringGrid
Question: How to set the columns width of a StringGrid
without truncate any text
Answer:
After filling your StringGrid with text strings
call the procedure SetOptimalGridCellWidth
thanks to William Sorensen for some improvements on the code.
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(*
$Header$
Module Name : General\BSGrids.pas
Main Program : Several.
Description : StringGrid support functions.
03/21/2000 enhanced by William Sorensen
*)
unit BSGrids;
interface
uses
Grids;
type
TExcludeColumns = set of 0..255;
procedure SetOptimalGridCellWidth(sg: TStringGrid;
ExcludeColumns: TExcludeColumns);
// Sets column widths of a StringGrid to avoid truncation of text.
// Fill grid with desired text strings first.
// If a column contains no text, DefaultColWidth will be used.
// Pass [] for ExcludeColumns to process all columns, including Fixed.
// Columns whose numbers (0-based) are specified in ExcludeColumns will not
// have their widths adjusted.
implementation
uses
Math; // we need the Max function
procedure SetOptimalGridCellWidth(sg: TStringGrid;
ExcludeColumns: TExcludeColumns);
var
i : Integer;
j : Integer;
max_width : Integer;
begin
with sg do
begin
// If the grid's Paint method hasn't been called yet,
// the grid's canvas won't use the right font for TextWidth.
// (TCustomGrid.Paint normally sets this, under DrawCells.)
Canvas.Font.Assign(Font);
for i := 0 to (ColCount - 1) do
begin
if i in ExcludeColumns then
Continue;
max_width := 0;
// Search for the maximal Text width of the current column.
for j := 0 to (RowCount - 1) do
max_width := Math.Max(max_width,Canvas.TextWidth(Cells[i,j]));
// The hardcode of 4 is based on twice the offset from the left
// margin in TStringGrid.DrawCell. GridLineWidth is not relevant.
if max_width 0 then
ColWidths[i] := max_width + 4
else
ColWidths[i] := DefaultColWidth;
end; { for }
end;
end;
end.
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