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| unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, Buttons, ExtCtrls, StdCtrls;
type
TForm1 = class(TForm)
PaintBox1: TPaintBox;
SpeedButton1: TSpeedButton;
SpeedButton2: TSpeedButton;
ColorBox1: TColorBox;
ColorBox2: TColorBox;
Label1: TLabel;
Label2: TLabel;
CheckBox1: TCheckBox;
SpeedButton3: TSpeedButton;
SpeedButton4: TSpeedButton;
procedure FormCreate(Sender: TObject);
procedure FormClose(Sender: TObject; var Action: TCloseAction);
procedure FormPaint(Sender: TObject);
procedure PaintBox1MouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
procedure PaintBox1MouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Integer);
procedure PaintBox1MouseUp(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
private
{ Private declarations }
public
{ Public declarations }
procedure repa;
end;
var
Form1: TForm1;
bm:TBitmap;
knp:Byte;
x1,y1,x2,y2,X3,Y3:Integer;
implementation
{$R *.dfm}
procedure TForm1.repa;
begin
PaintBox1.Canvas.Draw(0,0,bm);
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
bm:=TBitmap.Create;
bm.Height:=800;
bm.Width:=600;
bm.Canvas.Brush.Color:=clWhite;
bm.Canvas.Rectangle(0,0,799,599);
//PaintBox1.Canvas.Pen.Style:=psDot;
knp:=0;
end;
procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
bm.Free;
end;
procedure TForm1.FormPaint(Sender: TObject);
begin
repa;
end;
procedure TForm1.PaintBox1MouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
begin
if SpeedButton1.Down then knp:=1;
if SpeedButton2.Down then knp:=2;
if SpeedButton3.Down then knp:=3;
if SpeedButton4.Down then knp:=4;
x1:=X;
y1:=Y;
end;
procedure TForm1.PaintBox1MouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Integer);
begin
if knp=1 then begin
repa;
PaintBox1.Canvas.MoveTo(x1,y1);
PaintBox1.Canvas.LineTo(X,Y);
end;
if knp=2 then begin
repa;
PaintBox1.Canvas.Brush.Style:=bsClear;
PaintBox1.Canvas.Rectangle(x1,y1,x,y);
end;
if knp=3 then begin
repa;
PaintBox1.Canvas.Brush.Style:=bsClear;
PaintBox1.Canvas.Ellipse(x1,y1,x,y);
end;
if knp=4 then begin
PaintBox1.Canvas.MoveTo(x1,y1);
x1:=x;
y1:=y;
PaintBox1.Canvas.LineTo(x,y);
end;
x2:=X;
y2:=Y;
end;
procedure TForm1.PaintBox1MouseUp(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
begin
bm.Canvas.Pen.Color:=ColorBox1.Selected;
bm.Canvas.Brush.Color:=ColorBox2.Selected;
bm.Canvas.Brush.Style:=bsSolid;
if CheckBox1.Checked then bm.Canvas.Brush.Style:=bsClear;
if knp=1 then begin
bm.Canvas.MoveTo(x1,y1);
bm.Canvas.LineTo(x2,y2);
end;
if knp=2 then begin
bm.Canvas.Rectangle(x1,y1,x2,y2);
end;
if knp=3 then begin
bm.Canvas.Ellipse(x1,y1,x2,y2);
end;
if knp=4 then begin
bm.Canvas.MoveTo(x1,y1);
x1:=x;
y1:=y;
bm.Canvas.LineTo(x,y);
end;
knp:=0;
repa;
end;
end. |
(
