Question

我最近升级到了wxPython（wxPython 2.9.2.4）的开发版本，因为我需要在我的应用程序中使用wx.NotificationMessage的功能。由于我认为可能存在错误，我一直试图在某些用户事件上创建通知气泡失败。在提交此类错误之前，我想继续向邮件列表中的人询问他们认为可能存在的问题，并希望在我的代码中找到解决方案。

以下是我使用的代码：

import wx, sys

app = wx.PySimpleApp()

class TestTaskBarIcon(wx.TaskBarIcon):

    def __init__(self):
        wx.TaskBarIcon.__init__(self)
        # create a test icon
        bmp = wx.EmptyBitmap(16, 16)
        dc = wx.MemoryDC(bmp)
        dc.SetBrush(wx.RED_BRUSH)
        dc.Clear()
        dc.SelectObject(wx.NullBitmap)

        testicon = wx.EmptyIcon()
        testicon.CopyFromBitmap(bmp)

        self.SetIcon(testicon)
        self.Bind(wx.EVT_TASKBAR_LEFT_UP, lambda e: (self.RemoveIcon(),sys.exit()))

        wx.NotificationMessage("", "Hello world!").Show()

icon = TestTaskBarIcon()
app.MainLoop()

在我的Windows 7计算机上，代码会创建一个小的白色任务栏图标，并创建一个带有“Hello World！”短语的弹出窗口。问题？消息不在我的图标上。正在创建另一个图标，并将消息放在那里。看这个图片： http://www.pasteall.org/pic/18068" ＆GT;

我认为这可能是因为我在第22行没有传递父参数：

wx.NotificationMessage("", "Hello world!").Show()

以下是我将其更改为：

wx.NotificationMessage("", "Hello world!", self).Show()

“self”指的是任务栏图标。当我这样做时，我收到一个错误：

Traceback (most recent call last):
  File "C:\Python27\testnotificationmessage.py", line 24, in <module>
    icon = TestTaskBarIcon()
  File "C:\Python27\testnotificationmessage.py", line 22, in __init__
    wx.NotificationMessage("", "Hello world!", self).Show()
  File "C:\Python27\lib\site-packages\wx-2.9.2-msw\wx\_misc.py", line 1213, in __init__
    _misc_.NotificationMessage_swiginit(self,_misc_.new_NotificationMessage(*args))
TypeError: in method 'new_NotificationMessage', expected argument 3 of type 'wxWindow *'

发生了什么事？如果我删除那个参数，我不会得到我的结果，如果我添加参数，我会收到错误！我应该如何将wx.NotificationMessage与wx.TaskBarIcon一起使用！

请帮忙！我希望我已经提供了足够的细节。如果您需要更多请评论！

Answer 1

我不建议使用2.9。我在尝试时遇到了一些奇怪的错误。

您可以在2.8中使用相同的功能。我正在使用我前段时间发现的一些修改后的代码。

import wx, sys

try:
    import win32gui #, win32con
    WIN32 = True
except:
    WIN32 = False

class BalloonTaskBarIcon(wx.TaskBarIcon):
    """
    Base Taskbar Icon Class
    """
    def __init__(self):
        wx.TaskBarIcon.__init__(self)
        self.icon = None
        self.tooltip = ""

    def ShowBalloon(self, title, text, msec = 0, flags = 0):
        """
        Show Balloon tooltip
         @param title - Title for balloon tooltip
         @param msg   - Balloon tooltip text
         @param msec  - Timeout for balloon tooltip, in milliseconds
         @param flags -  one of wx.ICON_INFORMATION, wx.ICON_WARNING, wx.ICON_ERROR
        """
        if WIN32 and self.IsIconInstalled():
            try:
                self.__SetBalloonTip(self.icon.GetHandle(), title, text, msec, flags)
            except Exception:
                pass # print(e) Silent error

    def __SetBalloonTip(self, hicon, title, msg, msec, flags):

        # translate flags
        infoFlags = 0

        if flags & wx.ICON_INFORMATION:
            infoFlags |= win32gui.NIIF_INFO
        elif flags & wx.ICON_WARNING:
            infoFlags |= win32gui.NIIF_WARNING
        elif flags & wx.ICON_ERROR:
            infoFlags |= win32gui.NIIF_ERROR

        # Show balloon
        lpdata = (self.__GetIconHandle(),   # hWnd
                  99,                       # ID
                  win32gui.NIF_MESSAGE|win32gui.NIF_INFO|win32gui.NIF_ICON, # flags: Combination of NIF_* flags
                  0,                        # CallbackMessage: Message id to be pass to hWnd when processing messages
                  hicon,                    # hIcon: Handle to the icon to be displayed
                  '',                       # Tip: Tooltip text
                  msg,                      # Info: Balloon tooltip text
                  msec,                     # Timeout: Timeout for balloon tooltip, in milliseconds
                  title,                    # InfoTitle: Title for balloon tooltip
                  infoFlags                 # InfoFlags: Combination of NIIF_* flags
                  )
        win32gui.Shell_NotifyIcon(win32gui.NIM_MODIFY, lpdata)

        self.SetIcon(self.icon, self.tooltip)   # Hack: because we have no access to the real CallbackMessage value

    def __GetIconHandle(self):
        """
        Find the icon window.
        This is ugly but for now there is no way to find this window directly from wx
        """
        if not hasattr(self, "_chwnd"):
            try:
                for handle in wx.GetTopLevelWindows():
                    if handle.GetWindowStyle():
                        continue
                    handle = handle.GetHandle()
                    if len(win32gui.GetWindowText(handle)) == 0:
                        self._chwnd = handle
                        break
                if not hasattr(self, "_chwnd"):
                    raise Exception
            except:
                raise Exception, "Icon window not found"
        return self._chwnd

    def SetIcon(self, icon, tooltip = ""):
        self.icon = icon
        self.tooltip = tooltip
        wx.TaskBarIcon.SetIcon(self, icon, tooltip)

    def RemoveIcon(self):
        self.icon = None
        self.tooltip = ""
        wx.TaskBarIcon.RemoveIcon(self)

# ===================================================================
app = wx.PySimpleApp()

class TestTaskBarIcon(BalloonTaskBarIcon):

    def __init__(self):
        wx.TaskBarIcon.__init__(self)
        # create a test icon
        bmp = wx.EmptyBitmap(16, 16)
        dc = wx.MemoryDC(bmp)
        dc.SetBrush(wx.RED_BRUSH)
        dc.Clear()
        dc.SelectObject(wx.NullBitmap)

        testicon = wx.EmptyIcon()
        testicon.CopyFromBitmap(bmp)

        self.SetIcon(testicon)
        self.Bind(wx.EVT_TASKBAR_LEFT_UP, lambda e: (self.RemoveIcon(),sys.exit()))

        self.ShowBalloon("", "Hello world!")

icon = TestTaskBarIcon()
app.MainLoop()

Answer 2

TaskBarIcon中有一个名为ShowBalloon的未记录隐藏方法，仅适用于Windows。

来自the source：

def ShowBalloon(*args, **kwargs):
    """
    ShowBalloon(self, String title, String text, unsigned int msec=0, int flags=0) -> bool

    Show a balloon notification (the icon must have been already
    initialized using SetIcon).  Only implemented for Windows.

    title and text are limited to 63 and 255 characters respectively, msec
    is the timeout, in milliseconds, before the balloon disappears (will
    be clamped down to the allowed 10-30s range by Windows if it's outside
    it) and flags can include wxICON_ERROR/INFO/WARNING to show a
    corresponding icon

    Returns True if balloon was shown, False on error (incorrect parameters
    or function unsupported by OS)

    """
    return _windows_.TaskBarIcon_ShowBalloon(*args, **kwargs)

我在Windows上使用wxPython 2.9.4.0进行了测试，效果很好。

无法在wxPython中正确使用wx.NotificationMessage

2 个答案: