On 24-Aug-10 7:33 PM, Tony Cappellini wrote:
Does anyone know how to detect if a system has multiple monitors
(desktops) through Python?
I've written a program which allows the user to open multiple
stand-alone windows.
When I run this program I usually drag these windows to my secondary monitor.
I was to save the screen coordinates of the window locations so they
can be restored.
First, the program must detect the multiple desktops and then
understand if the screen coordinates of those
windows are related to the primary or secondary desktop.
You might find the following bit of code useful too. I used to use
MaxiVista a lot, which meant my desktop would often vary between one and
four monitors -- nothing was more annoying than apps that would position
themselves off-screen when I was only working off the laptop display.
So, I wrote fix_window_placements.py, which basically looks for windows
that may have off-screen coordinates and then moves them back onto the
main desktop.
Regards,
Trent.
# Copyright 2010, Trent Nelson (tr...@snakebite.org).
# $Id: fix_window_placements.py 6 2010-08-10 09:58:58Z Trent $
from win32gui import (
SetFocus,
MoveWindow,
EnumWindows,
GetClassName,
GetWindowRect,
GetWindowText,
IsWindowEnabled,
IsWindowVisible,
GetDesktopWindow,
GetWindowPlacement,
)
from ctypes import (
windll,
c_int,
c_long,
c_ulong,
c_double,
POINTER,
Structure,
WINFUNCTYPE,
)
class RECT(Structure):
_fields_ = [
('left', c_long),
('top', c_long),
('right', c_long),
('bottom', c_long)
]
def dump(self):
return map(int, (self.left, self.top, self.right, self.bottom))
MonitorEnumProc = WINFUNCTYPE(c_int, c_ulong, c_ulong, POINTER(RECT),
c_double)
def enum_display_monitors():
results = []
def _callback(monitor, dc, rect, data):
results.append(rect.contents.dump())
return 1
callback = MonitorEnumProc(_callback)
temp = windll.user32.EnumDisplayMonitors(0, 0, callback, 0)
return results
def get_desktop_area():
left = top = right = bottom = 0
for r in enum_display_monitors():
if r[0] < left:
left = r[0]
if r[1] < top:
top = r[0]
if r[2] > right:
right = r[2]
if r[3] > bottom:
bottom = r[3]
return (left, top, right, bottom)
def inside_desktop(hwnd):
desktop = get_desktop_area()
rect = GetWindowPlacement(hwnd)[4]
return (
rect[0] >= desktop[0] and
rect[1] >= desktop[1] and
rect[2] <= desktop[2] and
rect[3] <= desktop[3]
)
def enum_windows():
results = []
def _handler(hwnd, results):
results.append((hwnd, GetWindowText(hwnd), GetClassName(hwnd)))
EnumWindows(_handler, results)
return results
def main():
for hwnd, text, cls in enum_windows():
if IsWindowEnabled(hwnd) and IsWindowVisible(hwnd) and text:
if not inside_desktop(hwnd):
left, top, right, bottom = GetWindowPlacement(hwnd)[4]
width = right - left
height = bottom - top
(x, y) = GetWindowRect(GetDesktopWindow())[:2]
try:
MoveWindow(hwnd, x, y, width, height, 1)
print "moved '%s'" % text
except:
# Ignore windows we can't move.
pass
if __name__ == '__main__':
main()
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