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