ED/EDMarketConnector
1
0
Fork 0
mirror of https://github.com/EDCD/EDMarketConnector.git synced 2025-06-16 23:32:23 +03:00
Code Issues Projects Releases Wiki Activity

One instance of app per user account on Windows

Browse Source
This commit is contained in:
Jonathan Harris 2017-01-22 12:41:23 +00:00
parent a67eb982d8
commit 25e5f27c3a
1 changed files with 32 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
EDMarketConnector.py
View File

@ -832,14 +832,40 @@ class AppWindow:
# Run the app
if __name__ == "__main__":
# Ensure only one copy of the app is running. OSX does this automatically. Linux TODO.
# Ensure only one copy of the app is running under this user account. OSX does this automatically. Linux TODO.
if platform == 'win32':
import ctypes
h = ctypes.windll.user32.FindWindowW(u'TkTopLevel', unicode(applongname))
if h:
ctypes.windll.user32.ShowWindow(h, 9) # SW_RESTORE
ctypes.windll.user32.SetForegroundWindow(h) # Probably not necessary
sys.exit(0)
from ctypes.wintypes import *
EnumWindows = ctypes.windll.user32.EnumWindows
EnumWindowsProc = ctypes.WINFUNCTYPE(BOOL, HWND, LPARAM)
GetClassName = ctypes.windll.user32.GetClassNameW
GetClassName.argtypes = [HWND, LPWSTR, ctypes.c_int]
GetWindowText = ctypes.windll.user32.GetWindowTextW
GetWindowText.argtypes = [HWND, LPWSTR, ctypes.c_int]
GetWindowTextLength = ctypes.windll.user32.GetWindowTextLengthW
GetProcessHandleFromHwnd = ctypes.windll.oleacc.GetProcessHandleFromHwnd
SetForegroundWindow = ctypes.windll.user32.SetForegroundWindow
ShowWindow = ctypes.windll.user32.ShowWindow
def WindowTitle(h):
if h:
l = GetWindowTextLength(h) + 1
buf = ctypes.create_unicode_buffer(l)
if GetWindowText(h, buf, l):
return buf.value
return None
def enumwindowsproc(hWnd, lParam):
# class name limited to 256 - https://msdn.microsoft.com/en-us/library/windows/desktop/ms633576
cls = ctypes.create_unicode_buffer(257)
if GetClassName(hWnd, cls, 257) and cls.value == 'TkTopLevel' and WindowTitle(hWnd) == applongname and GetProcessHandleFromHwnd(hWnd):
# If GetProcessHandleFromHwnd succeeds then the app is already running as this user
ShowWindow(hWnd, 9) # SW_RESTORE
SetForegroundWindow(hWnd)
sys.exit(0)
return True
EnumWindows(EnumWindowsProc(enumwindowsproc), 0)
root = tk.Tk()
app = AppWindow(root)