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https://gitlab.com/freepascal.org/lazarus/lazarus.git
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82 lines
2.0 KiB
ObjectPascal
82 lines
2.0 KiB
ObjectPascal
unit rectanglestest;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, Forms, Graphics;
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type
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{ TfrmRectangles }
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TfrmRectangles = class(TForm)
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procedure FormPaint(Sender: TObject);
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private
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public
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end;
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var
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frmRectangles: TfrmRectangles;
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implementation
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{$R *.lfm}
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{ TfrmRectangles }
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procedure TfrmRectangles.FormPaint(Sender: TObject);
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var
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MyBitmap: TBitmap;
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begin
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MyBitmap := TBitmap.Create;
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try
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{ Set a size for the image }
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MyBitmap.Height := Height;// 150
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MyBitmap.Width := Width;// 400
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{ After memory has been reserved by setting the size
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of the image, we can start drawing }
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// Background
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MyBitmap.Canvas.Brush.Color := clWhite;
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MyBitmap.Canvas.Pen.Color := clWhite;
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MyBitmap.Canvas.Rectangle(0, 0, Width, Height);
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// Explaning text
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MyBitmap.Canvas.TextOut(100, 5, 'Brush: Red Pen: Black Grid: Blue');
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MyBitmap.Canvas.TextOut( 10, 25, 'DrawFocusRect');
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MyBitmap.Canvas.TextOut(125, 25, 'FillRect');
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MyBitmap.Canvas.TextOut(225, 25, 'FrameRect');
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MyBitmap.Canvas.TextOut(325, 25, 'Rectangle');
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// Grid
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MyBitmap.Canvas.Pen.Color := clBlue;
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// Horizontal
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MyBitmap.Canvas.Line( 0, 75, 400, 75);
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MyBitmap.Canvas.Line( 0, 125, 400, 125);
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// Vertical
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MyBitmap.Canvas.Line( 25, 40, 25, 150);
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MyBitmap.Canvas.Line( 75, 40, 75, 150);
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MyBitmap.Canvas.Line(125, 40, 125, 150);
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MyBitmap.Canvas.Line(175, 40, 175, 150);
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MyBitmap.Canvas.Line(225, 40, 225, 150);
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MyBitmap.Canvas.Line(275, 40, 275, 150);
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MyBitmap.Canvas.Line(325, 40, 325, 150);
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MyBitmap.Canvas.Line(375, 40, 375, 150);
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// Different rectangles
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MyBitmap.Canvas.Brush.Color := clRed;
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MyBitmap.Canvas.Pen.Color := clBlack;
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MyBitmap.Canvas.DrawFocusRect(Bounds(25, 75, 50, 50));
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MyBitmap.Canvas.FillRect(Bounds(125, 75, 50, 50));
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MyBitmap.Canvas.FrameRect(Bounds(225, 75, 50, 50));
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MyBitmap.Canvas.Rectangle(Bounds(325, 75, 50, 50));
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{ Draw the bitmap to the form }
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Canvas.Draw(0, 0, MyBitmap);
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finally
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MyBitmap.Free;
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end;
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end;
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end.
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