wxpython的MessageDialog用法

wxpython的MessageDialog是一个弹出式对话框，用于在GUI应用程序中显示消息、警告、错误或询问用户输入等信息。以下是MessageDialog的用法：

1. 导入wxPython库：

import wx

2. 创建MessageDialog：

dlg = wx.MessageDialog(parent, message, caption, style)

参数说明：
- parent：父窗口，可以为None。
- message：对话框显示的消息。
- caption：对话框的标题。
- style：对话框的样式，可以为wx.OK|wx.CANCEL|wx.YES|wx.NO|wx.ICON_INFORMATION|wx.ICON_QUESTION|wx.ICON_WARNING|wx.ICON_ERROR等。

3. 显示MessageDialog：

result = dlg.ShowModal()

4. 处理MessageDialog的返回值：

if result == wx.ID_OK:
    # 用户点击了OK按钮
elif result == wx.ID_CANCEL:
    # 用户点击了Cancel按钮
elif result == wx.ID_YES:
    # 用户点击了Yes按钮
elif result == wx.ID_NO:
    # 用户点击了No按钮

完整示例代码如下：

import wx

class MyFrame(wx.Frame):
    def __init__(self, parent):
        super().__init__(parent, title="MessageDialog Demo")
        self.InitUI()

    def InitUI(self):
        panel = wx.Panel(self)

        vbox = wx.BoxSizer(wx.VERTICAL)
        hbox = wx.BoxSizer(wx.HORIZONTAL)

        btn_info = wx.Button(panel, label="Info")
        btn_warn = wx.Button(panel, label="Warning")
        btn_error = wx.Button(panel, label="Error")
        btn_question = wx.Button(panel, label="Question")

        hbox.Add(btn_info, 1, wx.EXPAND|wx.ALL, 5)
        hbox.Add(btn_warn, 1, wx.EXPAND|wx.ALL, 5)
        hbox.Add(btn_error, 1, wx.EXPAND|wx.ALL, 5)
        hbox.Add(btn_question, 1, wx.EXPAND|wx.ALL, 5)

        vbox.Add(hbox, 1, wx.EXPAND|wx.ALL, 5)

        panel.SetSizer(vbox)

        btn_info.Bind(wx.EVT_BUTTON, self.OnInfo)
        btn_warn.Bind(wx.EVT_BUTTON, self.OnWarn)
        btn_error.Bind(wx.EVT_BUTTON, self.OnError)
        btn_question.Bind(wx.EVT_BUTTON, self.OnQuestion)

        self.Show()

    def OnInfo(self, e):
        dlg = wx.MessageDialog(self, "This is an information message.", "Information", wx.OK|wx.ICON_INFORMATION)
        dlg.ShowModal()
        dlg.Destroy()

    def OnWarn(self, e):
        dlg = wx.MessageDialog(self, "This is a warning message.", "Warning", wx.OK|wx.ICON_WARNING)
        dlg.ShowModal()
        dlg.Destroy()

    def OnError(self, e):
        dlg = wx.MessageDialog(self, "This is an error message.", "Error", wx.OK|wx.ICON_ERROR)
        dlg.ShowModal()
        dlg.Destroy()

    def OnQuestion(self, e):
        dlg = wx.MessageDialog(self, "Do you want to save your changes?", "Question", wx.YES_NO|wx.ICON_QUESTION)
        result = dlg.ShowModal()
        if result == wx.ID_YES:
            print("User clicked Yes button")
        elif result == wx.ID_NO:
            print("User clicked No button")
        dlg.Destroy()

if __name__ == '__main__':
    app = wx.App()
    frame = MyFrame(None)
    app.MainLoop()

运行程序，点击不同的按钮，会弹出不同类型的MessageDialog。