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unit mainform;
{$mode objfpc}{$H+}
interface
uses
SysUtils, Forms, Graphics, ExtCtrls;
type
{ TForm1 }
TForm1 = class(TForm)
Image: TImage;
procedure FormCreate(Sender: TObject);
private
public
end;
var
Form1: TForm1;
implementation
uses lclintf, types;
{$R *.lfm}
{ TForm1 }
procedure TForm1.FormCreate(Sender: TObject);
var
lRes: Integer;
lStr: String;
lMaxCount: Integer;
lPartialWidths: array[0..23] of Integer;
lSize: TSize;
i: Integer;
begin
for i := 0 to 23 do lPartialWidths[i] := 0;
// Basic initialization
Image.Canvas.Font.Size := 12;
Image.Canvas.Pen.Color := clWhite;
Image.Canvas.Brush.Color := clWhite;
Image.Canvas.Brush.Style := bsSolid;
Image.Canvas.Rectangle(0, 0, Image.Width, Image.Height);
// TextFitInfo test 1 (calls GetTextExtentExPoint with partial widths = nil)
lStr := 'ABCDEFGHIJKLMNOPQRSXYZ';
lRes := Image.Canvas.TextFitInfo(lStr, 80);
Image.Canvas.TextOut(20, 20, Format('TextFitInfo Test 1. Returned %d should be aprox. 7 to 10', [lRes]));
Image.Canvas.Brush.Color := clBlue;
Image.Canvas.Brush.Style := bsSolid;
Image.Canvas.Rectangle(20, 35, 100, 50);
Image.Canvas.Brush.Style := bsClear;
Image.Canvas.TextOut(20, 35, lStr);
// GetTextExtentExPoint test 1 with partial widths and MaxCount
lStr := 'ABCDEFGHIJKLMNOPQRSXYZ';
LCLIntf.GetTextExtentExPoint(Image.Canvas.Handle, PChar(lStr),
Length(lStr), 50, @lMaxCount, @lPartialWidths[0], lSize);
lRes := Image.Canvas.TextFitInfo(lStr, 50);
Image.Canvas.Brush.Style := bsClear;
Image.Canvas.TextOut(20, 60, Format('GetTextExtentExPoint Test 1. Returned MaxCount=%d should be aprox. 4 to 6', [lMaxCount]));
Image.Canvas.Brush.Color := clBlue;
for i := 0 to 6 do
begin
Image.Canvas.Brush.Style := bsSolid;
Image.Canvas.Rectangle(20, 75 + i * 15, 20+lPartialWidths[i], 90 + i * 15);
Image.Canvas.Brush.Style := bsClear;
Image.Canvas.TextOut(20, 75 + i *15, lStr);
end;
// Now add something hard: Arabic
lStr := 'العرب';
LCLIntf.GetTextExtentExPoint(Image.Canvas.Handle, PChar(lStr),
Length(lStr), 50, @lMaxCount, @lPartialWidths[0], lSize);
lRes := Image.Canvas.TextFitInfo(lStr, 50);
Image.Canvas.Brush.Style := bsClear;
Image.Canvas.TextOut(20, 200, Format('GetTextExtentExPoint Arabic. Returned MaxCount=%d should be aprox. 5', [lMaxCount]));
Image.Canvas.Brush.Color := clBlue;
for i := 0 to 4 do
begin
Image.Canvas.Brush.Style := bsSolid;
Image.Canvas.Rectangle(20+lSize.cx-lPartialWidths[i], 225 + i * 15, 20+lSize.cx, 240 + i * 15);
Image.Canvas.Brush.Style := bsClear;
Image.Canvas.TextOut(20, 225 + i *15, lStr);
end;
end;
end.
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