nanogui: Thread: move the window!

 
   In the main fuction of nanowm we see when 
nanowm get a GR_EVENT_TYPE_MOUSE_POSITION event,
it call do_mouse_moved(&event.mouse),and actually
call container_mousemoved(window, event),at the 
end of this fuction we see GrMoveWindow() to move 
the window to new position ,but as we know if we
do not press down mousebutton,we can't move the 
window,but I can find when and where to check if 
we should move the window to now position according
to mouse,can anyone give an explanation?
 	
   Thanks in advance!			

　　　　　　　　wang
####@####.####
　　　　　　　　　　2002-07-28

wang wrote:
>    In the main fuction of nanowm we see when 
> nanowm get a GR_EVENT_TYPE_MOUSE_POSITION event,
> it call do_mouse_moved(&event.mouse),and actually
> call container_mousemoved(window, event),at the 
> end of this fuction we see GrMoveWindow() to move 
> the window to new position ,but as we know if we
> do not press down mousebutton,we can't move the 
> window,but I can find when and where to check if 
> we should move the window to now position according
> to mouse,can anyone give an explanation?

Before the part where the window is moved in container_mousemoved(),
you'll notice the line:
	if(!window->active) return;

In other words, "if the mouse button isn't currently pressed down on the
title bar or if the window has the NOMOVE property set, return without
moving the window".

The reason is that when the mouse button is pressed down on the
container, container_buttondown() gets called and if the mouse is in the
title bar area and NOMOVE isn't set for that window, window->active gets
set to GR_TRUE. Also when the mouse button is released,
container_buttonup() gets called and window->active gets set to GR_FALSE.

-- 
------------ Alex Holden - http://www.linuxhacker.org ------------
If it doesn't work, you're not hitting it with a big enough hammer