Re: move/resize handling again

[Owen Taylor <otaylor redhat com>]

Matthias Clasen <maclas gmx de> writes:

> On Mon, 2002-11-11 at 23:55, Havoc Pennington wrote:
> > 
> > I'm probably being dense, but when does it matter, aside from
> > metacity's funky constraints code (which I have an elaborate plan to
> > change, see src/constraints.c)
> > 
> 
> Assume the window has origin 50, 50, size 100, 100 and gravity
> SouthWest. For simplicity assume the wm puts a 5 pixel frame around the 
> window, so that the frame origin is 45, 45 and its size is 110, 110. The
> reference point is where the southwest corner of the frame is: 155, 155.
> 
> In this scenario, an XMoveWindow (win, 55, 55) will leave the window 
> in place, since the WM calculates the new reference point 155, 155 and
> then place the southwest corner of the frame there, ending up with the 
> frame origin at 45, 45 as before.
> 
> A XResizeWindow (110, 110) will leave the reference point unchanged, the
> new frame size will be 120, 120, so the new frame origin will be at 
> 35, 35 and the new window origin will be at 40, 40.
> 
> Lets consider XMoveResize(55, 55, 110, 110) now. First interpretation:
> 
> move, resize: in the move step, the window doesn't change its position,
> so we end up with the same result as for the resize alone: frame origin
> 35, 35.
> 
> resize, move: after the resize step, we have window origin 40, 40, size
> 110, 110, frame origin 35, 35, size 120, 120. Now we do a move to 55,
> 55. First calculate the new reference point as 165, 165. Now move the
> frame reference point there. The result is a frame origin of 45, 45.   

I believe the 45, 45 location is correct ... what is most logical is
that the reference point for the new position of the window should
depend solely on the data in the MoveResize request, and not on the
history of the window's position.

Or, in other words, the resulting position should be that of a window
newly mapped with the given (x, y, width, height).

Regards,
                                        Owen