多个 WindowsBaloonTip/TrayTip 通知? [英] Multiple WindowsBaloonTip / TrayTip Notifications?

问题描述

如果您使用下面的此代码在通知区域中创建托盘提示 (BaloonTips)，您会注意到它只允许一条消息，然后卡住并出错.

If you were to use this code below to create TrayTips (BaloonTips) in the Notification Area you will notice that it only allows one message and then gets stuck and errors out.

代码取自此处:

# -- 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)

推荐答案

正如您所看到的，如果您尝试向 WindowsBalloonTip 类发送多个balloon_tip，您将收到以下错误:

As you can see if you were to try and send multiple balloon_tip's to the WindowsBalloonTip class you will get the following error:

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

查看 Microsoft 的 RegisterClass 文档，您还需要使用 UnregisterClass(lpClassName, hInstance)

Looking at Microsoft's documentation of the RegisterClass you need to Unregister the class as well by using UnregisterClass(lpClassName, hInstance)

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

我们可以通过添加:classAtom = UnregisterClass(classAtom, hinst) 但它必须在窗口被销毁后添加，例如这里是一个固定的完整版本

We can do this by adding: classAtom = UnregisterClass(classAtom, hinst) but it must be added AFTER the window has been destroyed for example here is a fixed full version

# -- 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...')

某些操作系统上的图标加载存在问题，因此如果您想要自己的自定义图标，请更改此行:

There are issues on certain operating systems with the icon loading so if you want your own custom icon then change this line:

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

例如:

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

这篇关于多个 WindowsBaloonTip/TrayTip 通知?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！