FYI: How to control a window position from an external process.

[Hiroyuki Komatsu]

FYI, Here is a tip to control a window postion from an external
porcess.

== Windows ==
It is quite easy on Windows.  Like here,

    import win32gui

    def move_window(self, hwnd, x, y):
        (x1, y1, x2, y2) = win32gui.GetWindowRect(hwnd)
        width  = x2 - x1
        height = y2 - y1
        redraw = 1 # True
        win32gui.MoveWindow(hwnd, x, y, width, height, redraw)

The valuable 'hwnd' is a window-id for Windows.  The following code
detects all of hwnd values.

    def get_hwnd_list(self):
        hwnd_list = [] # hwnd is an ID for window system in Windows.
        win32gui.EnumWindows(self._handler_EnumWindows, hwnd_list)
        return hwnd_list

    def _handler_EnumWindows(self, hwnd, window_list):
        window_list.append(hwnd)


== X ==
Though the Python-xlib library possibly control a window position of
another process, I have not found it yet.  So I wrote a module for it.
The module is available at 
<http://www.accessgrid.org/~komatsu/window-control-0.0.1.tar.gz>.
The files of the module are 'winctrl.py' and '_winctrl.so'.

A sample code is here,

    import winctrl
    winctrl.move_window(xwinid, x, y)

The valuable 'xwinid' is a window-id for X.  The following code
detects all of xwinid values.

    from Xlib import X, display, Xatom

    def __init__(self):
        self.display = display.Display()
        self.root_window = self.display.screen().root

    def get_xwinid_list(self):
        xwininfo = self.root_window.query_tree()
        return xwininfo.children

You may need to execute the following function _XmuClientWindow to
get non window manager's windows.

    def _XmuClientWindow(self, xwin):
        if xwin.get_wm_state():
            return xwin
        else:
            xwin_tree = xwin.query_tree()
            for child in xwin_tree.children:
                if child.get_wm_state():
                    return child
        return xwin


I am thinking I will create a pager to control windows' geometries of
vic, shared apps and so on for AG.  In the feature it would be able to
control a window layout of another machine via AG, if you need.

--
Hiro