Re: [AD] window resizing

[Jon Rafkind <workmin@xxxxxxxxxx>]

The attached patch allows the X11 window driver to be resized. As 
explained before, when a ConfigureNotify XEvent is received, the global 
resize_screen() is called with the new screen width and height. 
resize_screen() checks to see if the driver can handle screen resizing 
and then calls gfx_driver->resize_window() which returns a bitmap. 
resize_screen sets the global screen bitmap to this bitmap and the 
resizing is complete. If a user callback is set, that is called at the 
end of resize_screen. I have added an entry to the GFX_DRIVER and 
updated all the drivers( i hope ).

A few things..
1. In the X11 windowed driver: after the screen is resized the window 
manager tries to replace it on the screen. I can force the window to be 
in the same place by doing
hints->flags = USPosition;
  hints->x = attr.x;
  hints->y = attr.y;
  XSetWMNormalHints(_xwin.display, _xwin.window, hints);

But documentation on the web says hints->x and hints->y are deprecated. 
This works on my system( Xfree86 4.3.0 ) but dont know a better way to 
set the position of the window.

2. There is currently no way to turn off screen resizing.. For those 
programs that dont know how to handle screen resizing( every allegro 
program ever ) this should be turned off by default and the user would 
have to call a function to turn it on. For x11 this is easy becuase it 
just consists of telling the window manager the minimum and maximum size 
for the window, although I havent done this in my patch.

3. This is only implemented for x11, the resize_window function is NULL 
in every other driver. Michael Molhanec seems to have written a patch to 
resize windows in Windows.. can someone incorporate that along with my 
patch? I can theoretically get access to QNX but probably not macos.

anyway, its a first draft so let me know what issues there are with the 
patch.

later--,
jon

Attachment: resize.diff.gz
Description: application/gzip