Use a window as a screensaver on a second monitor

screensaver.py

import win32gui, win32con, time
import tkinter as tk
import pywintypes

windowList = []

def winEnumHandler( hwnd, ctx ):
 if win32gui.IsWindowVisible( hwnd ):
  windowList.append((hwnd, win32gui.GetWindowText( hwnd )))

win32gui.EnumWindows( winEnumHandler, None )

window = tk.Tk()

wtitle = tk.Label(text="Select a window to use:")
wtitle.pack()

sWindow = None
sTitle = None
def selected( elem ):
 global sWindow
 global sTitle
 sWindow = elem[0]
 sTitle = elem[1]
 window.destroy()

wbody = tk.Frame(window)
for windowElem in windowList:
 if len(windowElem[1]) != 0:
  thisName = tk.Button(wbody, text=windowElem[1],command=lambda val=windowElem: selected(val))
  thisName.pack()
wbody.pack(side = tk.BOTTOM)

print("Selecting idle window")
window.mainloop()
print("{} selected".format(sTitle))

px, py = 0, 0# previous mouse location
timer = 0# idle timer
active = False# is idle window open
while True:
 _,_, (x, y) = win32gui.GetCursorInfo()
 dy, dx = abs(y-py), abs(x-px)
 py, px = y, x
 if x >= 0 or dy*dy + dx*dx < 100:
  timer += 0.01
 else:
  if active:
   print("No longer idling.")
   win32gui.ShowWindow(sWindow, win32con.SW_SHOWMINNOACTIVE)
   active = False
  timer = 0
 
 if timer > 10 and not active:
  print("Now idling.")
  cwin = win32gui.GetForegroundWindow()
  active = True
  win32gui.ShowWindow(sWindow, win32con.SW_MAXIMIZE)
  try:
   win32gui.SetForegroundWindow(cwin)
  except pywintypes.error as e:
   if e.args[2] == 'Access is denied.':# hacky solution around access denied
    win32gui.ShowWindow(cwin, win32con.SW_MINIMIZE)
    win32gui.ShowWindow(cwin, win32con.SW_RESTORE)
   else:
    raise e
 time.sleep(0.01)

This should be a repo

I think im done though... added more prints, added workaround for access denied