Mouse position not looping

[m0rr0w]

Hey I'm trying to mimic the behavior i see in game engines where the mouse loops back around when it hits the edge of the screen. For example, once it hits the right of the screen, it resets the position and comes back around from the left. I have this code:

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void MyGLCanvas::resetMouse()
{
	int screenMaxX = wxSystemSettings::GetMetric(wxSYS_SCREEN_X);
	int screenMaxY = wxSystemSettings::GetMetric(wxSYS_SCREEN_Y);

	wxPoint pt = wxGetMousePosition();
	int x = pt.x;
	int y = pt.y;

	if (x >= screenMaxX)
		parentFrame->WarpPointer(0 - x, y);

	if(x <= 0)									 //doesn't work, left of screen
		parentFrame->WarpPointer(screenMaxX, y);
	

	if (y >= screenMaxY)						//doesn't work, bottom of screen
		parentFrame->WarpPointer(x, 0 - y);  

	if (y <= 0)
		parentFrame->WarpPointer(x, screenMaxY);
}

it works for the right and top of the screen but not for the bottom and the left. Am I doing something wrong or is there some info im missing about the screen layout or something? HELP!


-edit-

Ok i got it to work for all sides except the left. I changed the bottom of the screen to

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	if (y >= (screenMaxY - 1))						
		parentFrame->WarpPointer(x, 0 - y); 

and now it works. How come the left isn't working?

[doublemax]

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if(x <= 0)                            //doesn't work, left of screen
      parentFrame->WarpPointer(screenMaxX, y);

Try "screenMaxX-1" here. I'm surprised this works at all, as you're setting negative coordinates in some cases:

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if (x >= screenMaxX)
      parentFrame->WarpPointer(0 - x, y);