Carsten Haubold wrote:
> I'm using FLTK to manage the window specific stuff for my 3D-Engine.
> The Fl_Gl_Window was able to do anything I liked, but now I wanted to add
> mouse-look, and I'd need to fix the mouse cursor or set it to a certain
> position every frame...
> Is there any way of doing this? Like a setMousePos(x,y) or so?
A while ago I found some posts here about this issue, but i can't seem
to find them anymore, but among them was the following function to solve
this problem:
int jump_cursor (int new_x, int new_y)
{
#if defined WIN32
BOOL result = SetCursorPos(new_x, new_y);
if (result) return 0; // OK
#elif defined __APPLE__
CGPoint new_pos;
CGEventErr err;
new_pos.x = new_x;
new_pos.y = new_y;
err = CGWarpMouseCursorPosition(new_pos);
if (!err) return 0; // OK
#else // Assume this is Xlib
Window rootwindow = DefaultRootWindow(fl_display);
XWarpPointer(fl_display, rootwindow, rootwindow, 0, 0, 0, 0,
new_x, new_y);
return 0; // Assume OK
#endif
return -1; // Fail
} // jump_cursor
I have used it successfully on linux and on windows. It sets mouse
pointer to a screen position (new_x,new_y).
So If you have a top level window, w, and you want to warp the pointer
to a position (x,y) in it, to a position in a window 'w', you need to write:
jump_cursor(w.x()+my_x,w.y()+my_y);
If w is a subwindow then you write:
jump_cursor(w.parent().x()+w.x()+x,w.parent().y()+w.y()+y);
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