使用WPF在Canvas上画线

Question

In my WPF program I'm using canvas as a place to render drawings so when it is in line-drawing mode any unfinished line follows mouse cursor and waiting for another click to find the ending point of line.

One visual problem is that most of the time lines doesn't follow the cursor super fast... even sometimes I can see there is a delay. It finds it anyway but it doesn't stick to moving cursor as it is done in other drawing applications eg autocad or soildworks ...

What am I missing here?

Thanks,

Answer 1

As @PeteBaughman said, it would help to know a bit more about your code, trying posting a sample of how you add and edit the line. One possible solution though, is, if you haven't already done so, trying capturing the mouse:

XAML:

<Canvas OnMouseDown="MyCanvas_MouseDown" ... />

Code-Behind:

public void MyCanvas_MouseDown(object sender, MouseButtonEventArgs e){
    MyCanvas.CaptureMouse();
}

This should ensure you're getting all the mouse events and was the solution to a very similar problem I recently had.

Regards,

Richard