procedure TForm1.imgMouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Integer);
begin
if ts then img.Canvas.LineTo(X,Y);
end;procedure TForm1.imgMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
begin
ts:=True;
img.Canvas.MoveTo(X,Y);
end;
Y: Integer);
begin
if ts then img.Canvas.LineTo(X,Y);
end;procedure TForm1.imgMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
begin
ts:=True;
img.Canvas.MoveTo(X,Y);
end;
Shift: TShiftState; X, Y: Integer);
begin
ts:=True;
x1 := X;
y1 := Y;end;
最好写一个DrawShape过程
在MOUSEDOWN里初始化起始点
MOUSEMOVE里
DrawShape(StartPos,LastPos,pmNotXor);
LastPos:=Point(x,y);
DrawShape(StartPos,LastPos,pmNotxor);
MOUSEUP里
if ts then
begin
EndPos:=Point(x,y);
Drawing:=false;
end;