如何使用wxPython在Windows中使用本机错误图标和错误声音?

时间:2012-12-12 09:10:43

标签: python windows wxpython

这句简单的话:

wx.MessageBox('Foo', 'Bar', wx.OK | wx.ICON_ERROR)

给我一​​个带错误图标和Windows错误噪音的消息框( wx.Bell()的噪音相同)。我想为未捕获的异常创建一个自定义错误对话框,其中回溯在文本控件等中可用,并且我想包括Windows错误图标和噪声。我知道Windows版本之间存在差异,甚至可以自定义错误噪声。

有没有直接的方法在wxPython中使用这些本机Windows资源?奖金问题;如果答案是否定的,那么直接的方式是做我想做的事情?


接受答案后的结果:

我只想在 Anonymous Coward的优秀答案之后展示结果,因为它们远远超出了我的预期。这是现在弹出未处理异常的错误对话框(在Windows 8上):

Screenshot

它还包含现代Windows“UNNK!”错误的声音。这是对话框背后的代码。我将它放在一个单独的模块中,在导入时覆盖sys.excepthook

"""This module, when imported, overrides the default unhandled exception hook
with one that displays a fancy wxPython error dialog."""

import sys
import textwrap
import traceback
import winsound

import wx

def custom_excepthook(exception_type, value, tb):
    dialog = ExceptionDialog(exception_type, value, tb)
    dialog.ShowModal()

# Override sys.excepthook
sys.excepthook = custom_excepthook

class ExceptionDialog(wx.Dialog):
    """This class displays an error dialog with details information about the
    input exception, including a traceback."""

    def __init__(self, exception_type, exception, tb):
        wx.Dialog.__init__(self, None, -1, title="Unhandled error",
                           style=wx.DEFAULT_DIALOG_STYLE | wx.RESIZE_BORDER)

        self.SetSize((640, 480))
        self.SetMinSize((420, 200))

        self.exception = (exception_type, exception, tb)
        self.initialize_ui()

        winsound.MessageBeep(winsound.MB_ICONHAND)

    def initialize_ui(self):
        extype, exception, tb = self.exception

        panel = wx.Panel(self, -1)

        # Create the top row, containing the error icon and text message.
        top_row_sizer = wx.BoxSizer(wx.HORIZONTAL)

        error_bitmap = wx.ArtProvider.GetBitmap(
            wx.ART_ERROR, wx.ART_MESSAGE_BOX
        )
        error_bitmap_ctrl = wx.StaticBitmap(panel, -1)
        error_bitmap_ctrl.SetBitmap(error_bitmap)

        message_text = textwrap.dedent("""\
            I'm afraid there has been an unhandled error. Please send the
            contents of the text control below to the application's developer.\
        """)
        message_label = wx.StaticText(panel, -1, message_text)

        top_row_sizer.Add(error_bitmap_ctrl, flag=wx.ALL, border=10)
        top_row_sizer.Add(message_label, flag=wx.ALIGN_CENTER_VERTICAL)

        # Create the text control with the error information.
        exception_info_text = textwrap.dedent("""\
            Exception type: {}

            Exception: {}

            Traceback:
            {}\
        """)
        exception_info_text = exception_info_text.format(
            extype, exception, ''.join(traceback.format_tb(tb))
        )

        text_ctrl = wx.TextCtrl(panel, -1,
                                style=wx.TE_MULTILINE | wx.TE_DONTWRAP)
        text_ctrl.SetValue(exception_info_text)

        # Create the OK button in the bottom row.
        ok_button = wx.Button(panel, -1, 'OK')
        self.Bind(wx.EVT_BUTTON, self.on_ok, source=ok_button)
        ok_button.SetFocus()
        ok_button.SetDefault()

        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(top_row_sizer)
        # sizer.Add(message_label, flag=wx.ALL | wx.EXPAND, border=10)
        sizer.Add(text_ctrl, proportion=1, flag=wx.EXPAND)
        sizer.Add(ok_button, flag=wx.ALIGN_CENTER | wx.ALL, border=5)

        panel.SetSizer(sizer)

    def on_ok(self, event):
        self.Destroy()

我希望的唯一改进是静态文本根据对话框的宽度自动流动和包装,但我不能为此创建自定义控件类。

1 个答案:

答案 0 :(得分:4)

wx.MessageBox调用特定于操作系统的标准消息/警告对话框(在Windows上,来自user32.dll的MessageBox())。 wxWidgets只是将您提供的标志(如wx.OK和wx.ICON_INFORMATION)转换为特定于操作系统的标志和本机消息框的选项。

您可以通过wx.ArtProvider获取特定于操作系统的图标。

就声音而言,wx.Sound只能播放声音文件。但是,如果应用程序不必是可移植的,则可以使用winsound模块。

import wx
import winsound # windows only

class Frame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self,None,wx.ID_ANY)
        sizer = wx.BoxSizer(wx.HORIZONTAL)
        sizer.Add( wx.StaticBitmap(self,bitmap=wx.ArtProvider.GetBitmap(wx.ART_INFORMATION)) )
        sizer.Add( wx.StaticBitmap(self,bitmap=wx.ArtProvider.GetBitmap(wx.ART_QUESTION)) )
        sizer.Add( wx.StaticBitmap(self,bitmap=wx.ArtProvider.GetBitmap(wx.ART_WARNING)) )
        sizer.Add( wx.StaticBitmap(self,bitmap=wx.ArtProvider.GetBitmap(wx.ART_ERROR)) )
        self.SetSizerAndFit(sizer)
        self.Show()
        winsound.MessageBeep(winsound.MB_ICONASTERISK)
        winsound.PlaySound('SystemHand', winsound.SND_ASYNC | winsound.SND_ALIAS)

app = wx.PySimpleApp()
Frame()
app.MainLoop()