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Last change
on this file was 455, checked in by chronos, 13 years ago |
- Modified: PrintPreview should use TVectorCanvas instead of raster TCanvas dependent on DPI of printer. But some font function as TextWidth and TextHeight cannot be easily implemented without use of OS API.
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File size:
1.2 KB
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| 1 | unit UFormMain;
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| 2 |
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| 3 | {$mode objfpc}{$H+}
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| 4 |
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| 5 | interface
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| 6 |
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| 7 | uses
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| 8 | Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, StdCtrls,
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| 9 | UPrintPreview;
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| 10 |
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| 11 | type
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| 12 |
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| 13 | { TFormMain }
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| 14 |
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| 15 | TFormMain = class(TForm)
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| 16 | ButtonPreview: TButton;
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| 17 | PrintPreview1: TPrintPreview;
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| 18 | procedure ButtonPreviewClick(Sender: TObject);
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| 19 | procedure PrintPreview1Print(Sender: TObject);
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| 20 | private
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| 21 | { private declarations }
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| 22 | public
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| 23 | { public declarations }
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| 24 | end;
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| 25 |
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| 26 | var
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| 27 | FormMain: TFormMain;
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| 28 |
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| 29 | implementation
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| 30 |
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| 31 | {$R *.lfm}
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| 32 |
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| 33 | { TFormMain }
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| 34 |
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| 35 | procedure TFormMain.ButtonPreviewClick(Sender: TObject);
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| 36 | begin
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| 37 | PrintPreview1.Execute;
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| 38 | end;
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| 39 |
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| 40 | procedure TFormMain.PrintPreview1Print(Sender: TObject);
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| 41 | begin
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| 42 | with PrintPreview1, Canvas do begin
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| 43 | Font.Name := 'Arial';
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| 44 | Font.Height := -Round(Font.PixelsPerInch / SizeDivider);
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| 45 | Font.Color := clBlack;
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| 46 | PageTitle := 'Print preview demo';
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| 47 | Line(MMToPixels(10), MMToPixels(10), MMToPixels(100), MMToPixels(100));
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| 48 | TextOut(MMToPixels(50), MMToPixels(100), 'Some simple text');
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| 49 | Font.Height := -Round(Font.PixelsPerInch / SizeDivider * 4);
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| 50 | TextOut(MMToPixels(100), MMToPixels(150), 'Big text');
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| 51 | end;
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| 52 | end;
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| 53 |
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| 54 | end.
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| 55 |
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