用按钮切换wxpython面板

Question

import wx
import wx.grid as gridlib

########################################################################
class PanelOne(wx.Panel):
    """"""

    #----------------------------------------------------------------------
    def __init__(self, parent):
        """Constructor"""
        wx.Panel.__init__(self, parent=parent)
        txt = wx.TextCtrl(self)
        button =wx.Button(self, label="Save", pos=(200, 325))
        button.Bind(wx.EVT_BUTTON, self.onSwitchPanels)

########################################################################
class PanelTwo(wx.Panel):
    """"""

    #----------------------------------------------------------------------
    def __init__(self, parent):
        """Constructor"""
        wx.Panel.__init__(self, parent=parent)

        grid = gridlib.Grid(self)
        grid.CreateGrid(25,12)

        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(grid, 0, wx.EXPAND)
        self.SetSizer(sizer)

########################################################################
class MyForm(wx.Frame):

    #----------------------------------------------------------------------
    def __init__(self):
        wx.Frame.__init__(self, None, wx.ID_ANY,
                          "Panel Switcher Tutorial")

        self.panel_one = PanelOne(self)
        self.panel_two = PanelTwo(self)
        self.panel_two.Hide()

        self.sizer = wx.BoxSizer(wx.VERTICAL)
        self.sizer.Add(self.panel_one, 1, wx.EXPAND)
        self.sizer.Add(self.panel_two, 1, wx.EXPAND)
        self.SetSizer(self.sizer)

        menubar = wx.MenuBar()
        fileMenu = wx.Menu()
        switch_panels_menu_item = fileMenu.Append(wx.ID_ANY,
                                                  "Switch Panels",
                                                  "Some text")
        self.Bind(wx.EVT_MENU, self.onSwitchPanels,
                  switch_panels_menu_item)
        menubar.Append(fileMenu, '&File')
        self.SetMenuBar(menubar)

    #----------------------------------------------------------------------
    def onSwitchPanels(self, event):

       if self.panel_one.IsShown():    
          self.SetTitle("Panel Two Showing")
          self.panel_one.Hide
          self.panel_two.Show()
       else:
          self.SetTitle("Panel One Showing")
          self.panel_one.Show()
          self.panel_two.Hide()
          self.Layout()


# Run the program
if __name__ == "__main__":
    app = wx.App(False)
    frame = MyForm()
    frame.Show()
    app.MainLoop()

我想在点击PanelOne类里的按钮时调用onSwitchPanels这个函数。这个应用程序我希望能像这个Tkinter的代码那样工作。

我遇到问题了，求助，谢谢大家。

Answer 1

我在一年前写过一个关于这个主题的教程，虽然我用的是菜单来切换。不过你可以调整代码，让你的按钮来实现这个功能。这里是教程链接：http://www.blog.pythonlibrary.org/2010/06/16/wxpython-how-to-switch-between-panels/

补充说明：上面代码的问题有三个方面。首先，在onSwitchPanels这个方法里，你需要加上“self.panel_one.Hide()”。注意你代码里缺少了括号。其次，“self.Layout()”这一行需要和if语句在同一层级，而不是放在“else”里面。最后，你不能从PanelOne调用“onSwitchPanels”，因为在那儿没有定义这个方法。不过你可以把它改成这样：

button.Bind(wx.EVT_BUTTON, parent.onSwitchPanels)

虽然这个方法不太优雅，也不太推荐，但它确实能工作。不过你最好还是用PubSub来处理这个问题。

补充说明#2：我应该直接把代码发出来，因为提问者根本不愿意尝试我的建议。

import wx
import wx.grid as gridlib

########################################################################
class PanelOne(wx.Panel):
    """"""

    #----------------------------------------------------------------------
    def __init__(self, parent):
        """Constructor"""
        wx.Panel.__init__(self, parent=parent)
        txt = wx.TextCtrl(self)
        button =wx.Button(self, label="Save", pos=(200, 325))
        button.Bind(wx.EVT_BUTTON, parent.onSwitchPanels)

########################################################################
class PanelTwo(wx.Panel):
    """"""

    #----------------------------------------------------------------------
    def __init__(self, parent):
        """Constructor"""
        wx.Panel.__init__(self, parent=parent)

        grid = gridlib.Grid(self)
        grid.CreateGrid(25,12)

        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(grid, 0, wx.EXPAND)
        self.SetSizer(sizer)

########################################################################
class MyForm(wx.Frame):

    #----------------------------------------------------------------------
    def __init__(self):
        wx.Frame.__init__(self, None, wx.ID_ANY,
                          "Panel Switcher Tutorial",
                          size=(800,600))

        self.panel_one = PanelOne(self)
        self.panel_two = PanelTwo(self)
        self.panel_two.Hide()

        self.sizer = wx.BoxSizer(wx.VERTICAL)
        self.sizer.Add(self.panel_one, 1, wx.EXPAND)
        self.sizer.Add(self.panel_two, 1, wx.EXPAND)
        self.SetSizer(self.sizer)

        menubar = wx.MenuBar()
        fileMenu = wx.Menu()
        switch_panels_menu_item = fileMenu.Append(wx.ID_ANY,
                                                  "Switch Panels",
                                                  "Some text")
        self.Bind(wx.EVT_MENU, self.onSwitchPanels,
                  switch_panels_menu_item)
        menubar.Append(fileMenu, '&File')
        self.SetMenuBar(menubar)

    #----------------------------------------------------------------------
    def onSwitchPanels(self, event):

        if self.panel_one.IsShown():
           self.SetTitle("Panel Two Showing")
           self.panel_one.Hide()
           self.panel_two.Show()
        else:
           self.SetTitle("Panel One Showing")
           self.panel_one.Show()
           self.panel_two.Hide()
        self.Layout()

# Run the program
if __name__ == "__main__":
    app = wx.App(False)
    frame = MyForm()
    frame.Show()
    app.MainLoop()