canvas为何不能用异或的方法消去所画曲线？多谢(100分)

R

rxh

Unregistered / Unconfirmed

GUEST, unregistred user!

• 1999-05-27

• #1

我在paintbox的canvas下画一条曲线，我想用
异或的方法消隐此曲线，为何无法实现？
多谢！

 

M

menxin

Unregistered / Unconfirmed

GUEST, unregistred user!

• 1999-05-27

• #2

用pmnot好象无问题啊。

with PaintBox1.Canvas do
begin
Pen.Mode:=pmnot;
MoveTo(10,10);
LineTo(100,100);
end;

 

B

Blade

Unregistered / Unconfirmed

GUEST, unregistred user!

• 1999-05-27

• #3

设置Pen.Mode = pmNotXor。
with PaintBox1 do
begin
Pen.Mode = pmNotXor;

MoveTo(OriginPt.X, OriginPt.Y);
LineTo(MovePt.X, MovePt.Y);
MovePt := Point(X, Y);
MoveTo(OriginPt.X, OriginPt.Y);
LineTo(MovePt.X, MovePt.Y);
end;

 

L

lizhao

Unregistered / Unconfirmed

GUEST, unregistred user!

• 1999-06-01

• #4

注意要刷新。我有一次就是没有刷新。

 

R

rxh

Unregistered / Unconfirmed

GUEST, unregistred user!

• 1999-06-01

• #5

多人接受答案了。