多個WindowsBaloonTip/TrayTip通知？

Question

如果您要使用以下代碼在通知區域創建TrayTips（BaloonTips），您將注意到它只允許一條消息，然後卡住並出錯。

的代碼是從here採取：

# -- coding: utf-8 -- 

from win32api import * 
from win32gui import * 
import win32con 
import sys, os 
import struct 
import time 

class WindowsBalloonTip: 
    def __init__(self, title, msg): 
     message_map = { 
       win32con.WM_DESTROY: self.OnDestroy, 
     } 
     # Register the Window class. 
     wc = WNDCLASS() 
     hinst = wc.hInstance = GetModuleHandle(None) 
     wc.lpszClassName = "PythonTaskbar" 
     wc.lpfnWndProc = message_map # could also specify a wndproc. 
     classAtom = RegisterClass(wc) 
     # Create the Window. 
     style = win32con.WS_OVERLAPPED | win32con.WS_SYSMENU 
     self.hwnd = CreateWindow(classAtom, "Taskbar", style, \ 
       0, 0, win32con.CW_USEDEFAULT, win32con.CW_USEDEFAULT, \ 
       0, 0, hinst, None) 
     UpdateWindow(self.hwnd) 
     iconPathName = os.path.abspath(os.path.join(sys.path[0], "balloontip.ico")) 
     icon_flags = win32con.LR_LOADFROMFILE | win32con.LR_DEFAULTSIZE 
     try: 
      hicon = LoadImage(hinst, iconPathName, \ 
        win32con.IMAGE_ICON, 0, 0, icon_flags) 
     except: 
      hicon = LoadIcon(0, win32con.IDI_APPLICATION) 
     flags = NIF_ICON | NIF_MESSAGE | NIF_TIP 
     nid = (self.hwnd, 0, flags, win32con.WM_USER+20, hicon, "tooltip") 
     Shell_NotifyIcon(NIM_ADD, nid) 
     Shell_NotifyIcon(NIM_MODIFY, \ 
         (self.hwnd, 0, NIF_INFO, win32con.WM_USER+20,\ 
          hicon, "Balloon tooltip",msg,200,title)) 
     # self.show_balloon(title, msg) 
     time.sleep(10) 
     DestroyWindow(self.hwnd) 
    def OnDestroy(self, hwnd, msg, wparam, lparam): 
     nid = (self.hwnd, 0) 
     Shell_NotifyIcon(NIM_DELETE, nid) 
     PostQuitMessage(0) # Terminate the app. 

def balloon_tip(title, msg): 
    w=WindowsBalloonTip(title, msg) 

Answer 1

正如你可以看到，如果你嘗試和發送多個balloon_tip的到WindowsBalloonTip類，你會收到以下錯誤：

File "C:/WindowsBalloonTip.py", line 20, in __init__ 
    classAtom = RegisterClass(wc) 
error: (1410, 'RegisterClass', 'Class already exists.') 

展望在Microsoft的RegisterClass文檔中，您還需要註銷該類以及使用UnregisterClass(lpClassName, hInstance)

http://msdn.microsoft.com/en-us/library/ms644899

我們可以通過添加做到這一點：classAtom = UnregisterClass(classAtom, hinst)但必須添加之後的窗口已經被破壞了這裏的例子是一個固定的完整版

# -- coding: utf-8 -- 

from win32api import * 
from win32gui import * 
import win32con 
import sys, os 
import struct 
import time 

# Class 
class WindowsBalloonTip: 
    def __init__(self, title, msg): 
     message_map = { win32con.WM_DESTROY: self.OnDestroy,} 

     # Register the window class. 
     wc = WNDCLASS() 
     hinst = wc.hInstance = GetModuleHandle(None) 
     wc.lpszClassName = 'PythonTaskbar' 
     wc.lpfnWndProc = message_map # could also specify a wndproc. 
     classAtom = RegisterClass(wc) 

     # Create the window. 
     style = win32con.WS_OVERLAPPED | win32con.WS_SYSMENU 
     self.hwnd = CreateWindow(classAtom, "Taskbar", style, 0, 0, win32con.CW_USEDEFAULT, win32con.CW_USEDEFAULT, 0, 0, hinst, None) 
     UpdateWindow(self.hwnd) 

     # Icons managment 
     iconPathName = os.path.abspath(os.path.join(sys.path[0], 'balloontip.ico')) 
     icon_flags = win32con.LR_LOADFROMFILE | win32con.LR_DEFAULTSIZE 
     try: 
      hicon = LoadImage(hinst, iconPathName, win32con.IMAGE_ICON, 0, 0, icon_flags) 
     except: 
      hicon = LoadIcon(0, win32con.IDI_APPLICATION) 
     flags = NIF_ICON | NIF_MESSAGE | NIF_TIP 
     nid = (self.hwnd, 0, flags, win32con.WM_USER+20, hicon, 'Tooltip') 

     # Notify 
     Shell_NotifyIcon(NIM_ADD, nid) 
     Shell_NotifyIcon(NIM_MODIFY, (self.hwnd, 0, NIF_INFO, win32con.WM_USER+20, hicon, 'Balloon Tooltip', msg, 200, title)) 
     # self.show_balloon(title, msg) 
     time.sleep(5) 

     # Destroy 
     DestroyWindow(self.hwnd) 
     classAtom = UnregisterClass(classAtom, hinst) 
    def OnDestroy(self, hwnd, msg, wparam, lparam): 
     nid = (self.hwnd, 0) 
     Shell_NotifyIcon(NIM_DELETE, nid) 
     PostQuitMessage(0) # Terminate the app. 

# Function 
def balloon_tip(title, msg): 
    w=WindowsBalloonTip(title, msg) 

# Main 
if __name__ == '__main__': 
    # Example 
    balloon_tip('Lorem Ipsum', 'Neque porro quisquam est qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit...') 
    balloon_tip('Example two', 'There is no one who loves pain itself, who seeks after it and wants to have it, simply because it is pain...') 

有上有圖標某些操作系統問題裝載所以如果你想那麼自己的自定義圖標改變這一行：

iconPathName = os.path.abspath(os.path.join(sys.path[0], 'balloontip.ico')) 

喜歡的東西：

iconPathName = "C:\myfolder\myicon.ico"