wxPython中，打開的文件和顯示文本textctrl區域

Question

漂亮的新wxPython的，所以我這個苦苦掙扎。在教程的幫助下，我已經有了一點點並試圖學習。

我在文件菜單中的「打開」，我試圖讓它這樣，當我打開一個文件，文件中的文本將在我的多textctrl框中顯示被

我曾嘗試一些比特如WriteText（）和SetValue（），但無法顯示它。

import wx 
import os 



class MainWindow(wx.Frame): 
def __init__(self, parent, title): 
    self.dirname='' 
    super(MainWindow, self).__init__(parent, title=title, size=(450, 450)) 
    self.CreateStatusBar() # A Statusbar in the bottom of the window 
    global urlFld 

    self.InitGUI() 
    self.Centre() 
    self.Show() 

def InitGUI(self): 

    #MENUS 
    fileMenu = wx.Menu() #create menu for file 
    viewMenu = wx.Menu() #create a menu for view 
    helpMenu = wx.Menu() #create a menu for help 

    #FILE MENU 
    menuOpen = fileMenu.Append(wx.ID_OPEN, "&Open"," Open a file to edit") #add open to File 
    menuExit = fileMenu.Append(wx.ID_EXIT, "E&xit"," Terminate the program") #add exit to File 

    #VIEW MENU 
    menuView = viewMenu.Append(wx.ID_ANY, "TODO:", "Still to do") 

    #HELP MENU 
    menuAbout = helpMenu.Append(wx.ID_ABOUT, "&About", "About this program") #add about menu item 

    #MENUBAR 
    menuBar = wx.MenuBar() 
    menuBar.Append(fileMenu,"&File") # Adding the "filemenu" to the MenuBar 
    menuBar.Append(viewMenu, "&View") 
    menuBar.Append(helpMenu, "&Help") 
    self.SetMenuBar(menuBar) # Adding the MenuBar to the Frame content. 

    '''#TOOLBAR 
    toolbar = self.CreateToolBar() 
    toolOpen = toolbar.AddLabelTool(wx.ID_OPEN, "Open", wx.Bitmap("open.png")) 
    toolExit = toolbar.AddLabelTool(wx.ID_EXIT, "Exit", wx.Bitmap("blah.png"))''' 


    #MENU EVENTS 
    self.Bind(wx.EVT_MENU, self.OnOpen, menuOpen) 
    self.Bind(wx.EVT_MENU, self.OnAbout, menuAbout) 
    self.Bind(wx.EVT_MENU, self.OnExit, menuExit) 

    '''#TOOLBAR EVENTS 
    self.Bind(wx.EVT_TOOL, self.OnExit, toolExit) 
    self.Bind(wx.EVT_TOOL, self.OnOpen, toolOpen)''' 


    #PANEL 
    panel = wx.Panel(self) 

    panel.SetBackgroundColour('#ededed') 
    vBox = wx.BoxSizer(wx.VERTICAL) 

    hBox = wx.BoxSizer(wx.HORIZONTAL) 
    hBox.Add(wx.StaticText(panel, label="File:"), flag=wx.TOP, border=3) 
    hBox.Add(wx.TextCtrl(panel), 1, flag=wx.LEFT, border=10) 
    checkBtn = wx.Button(panel, -1, "Check") 
    self.Bind(wx.EVT_BUTTON, self.checkBtnClick) 
    hBox.Add(checkBtn, 0, flag=wx.LEFT, border=10) 
    vBox.Add(hBox, flag=wx.EXPAND|wx.LEFT|wx.RIGHT|wx.TOP, border=10) 
    vBox.Add((-1, 10)) 

    hBox2 = wx.BoxSizer(wx.HORIZONTAL) 
    hBox2.Add(wx.StaticText(panel, label="URLs:")) 
    vBox.Add(hBox2, flag=wx.LEFT, border=10) 
    vBox.Add((-1, 5)) 

    hBox3 = wx.BoxSizer(wx.HORIZONTAL) 
    urlFld = wx.TextCtrl(panel, style=wx.TE_MULTILINE, size=(-1,295)) 
    hBox3.Add(urlFld, 1, flag=wx.EXPAND) 
    vBox.Add(hBox3, flag=wx.EXPAND|wx.LEFT|wx.RIGHT, border=10) 


    panel.SetSizer(vBox) 

#GUI EVENTS 
def checkBtnClick(self, e): 
    urlFld.SetValue(self, "blahh") 

#MENU ITEM EVENTS 
def OnAbout(self,e): 
    dlg = wx.MessageDialog(self, "A small text editor", "My test editor", wx.OK) #create a dialog (dlg) box to display the message, and ok button 
    dlg.ShowModal() #show the dialog box, modal means cannot do anything on the program until clicks ok or cancel 
    dlg.Destroy() #destroy the dialog box when its not needed 

def OnExit(self,e): 
    self.Close(True) #on menu item select, close the app frame. 

def OnOpen(self,e): 
    self.dirname="" #set directory name to blank 
    dlg = wx.FileDialog(self, "Choose a file to open", self.dirname, "", "*.*", wx.OPEN) #open the dialog boxto open file 
    if dlg.ShowModal() == wx.ID_OK: #if positive button selected.... 
     self.filename = dlg.GetFilename() #get the filename of the file 
     self.dirname = dlg.GetDirectory() #get the directory of where file is located 
     f = open(os.path.join(self.dirname, self.filename), 'r') #traverse the file directory and find filename in the OS 
     text = f.read() 
     self.urlFld.SetValue(f.read()) #open the file from location as read 
     self.urlFld.WriteText(text) 
     f.close 
    dlg.Destroy() 

app = wx.App(False) #creates a new app 
MainWindow(None, "URL Checker") #give the frame a title 
app.MainLoop() #start the apps mainloop which handles app events 

感謝

Answer 1

urlFld應該是類的屬性：

# 'self' added 
self.urlFld = wx.TextCtrl(panel, style=wx.TE_MULTILINE, size=(-1,295)) 

，而不是一個局部變量，這樣就可以在外面的方法引用它。

Answer 2

不要使用全局變量使用自這裏，而不是修改代碼

import wx 
import os 



class MainWindow(wx.Frame): 
    def __init__(self, parent, title): 
     self.dirname = '' 
     super(MainWindow, self).__init__(parent, title=title, size=(450, 450)) 
     self.CreateStatusBar() # A Statusbar in the bottom of the window 

     self.InitGUI() 
     self.Centre() 
     self.Show() 

    def InitGUI(self): 

     # MENUS 
     fileMenu = wx.Menu() # create menu for file 
     viewMenu = wx.Menu() # create a menu for view 
     helpMenu = wx.Menu() # create a menu for help 

     # FILE MENU 
     menuOpen = fileMenu.Append(wx.ID_OPEN, 
         "&Open", " Open a file to edit") # add open to File 
     menuExit = fileMenu.Append(wx.ID_EXIT, "E&xit", 
           " Terminate the program") # add exit to File 

     # VIEW MENU 
     menuView = viewMenu.Append(wx.ID_ANY, "TODO:", "Still to do") 

     # HELP MENU 
     menuAbout = helpMenu.Append(wx.ID_ABOUT, "&About", 
           "About this program") # add about menu item 

     # MENUBAR 
     menuBar = wx.MenuBar() 
     menuBar.Append(fileMenu, "&File") # Adding the "filemenu" to the MenuBar 
     menuBar.Append(viewMenu, "&View") 
     menuBar.Append(helpMenu, "&Help") 
     self.SetMenuBar(menuBar) # Adding the MenuBar to the Frame content. 

     '''#TOOLBAR 
     toolbar = self.CreateToolBar() 
     toolOpen = toolbar.AddLabelTool(wx.ID_OPEN, "Open", wx.Bitmap("open.png")) 
     toolExit = toolbar.AddLabelTool(wx.ID_EXIT, "Exit", wx.Bitmap("blah.png"))''' 

     # MENU EVENTS 
     self.Bind(wx.EVT_MENU, self.OnOpen, menuOpen) 
     self.Bind(wx.EVT_MENU, self.OnAbout, menuAbout) 
     self.Bind(wx.EVT_MENU, self.OnExit, menuExit) 

     '''#TOOLBAR EVENTS 
     self.Bind(wx.EVT_TOOL, self.OnExit, toolExit) 
     self.Bind(wx.EVT_TOOL, self.OnOpen, toolOpen)''' 


     # PANEL 
     panel = wx.Panel(self) 

     panel.SetBackgroundColour('#ededed') 
     vBox = wx.BoxSizer(wx.VERTICAL) 

     hBox = wx.BoxSizer(wx.HORIZONTAL) 
     hBox.Add(wx.StaticText(panel, label="File:"), flag=wx.TOP, border=3) 
     hBox.Add(wx.TextCtrl(panel), 1, flag=wx.LEFT, border=10) 
     checkBtn = wx.Button(panel, -1, "Check") 
     self.Bind(wx.EVT_BUTTON, self.checkBtnClick) 
     hBox.Add(checkBtn, 0, flag=wx.LEFT, border=10) 
     vBox.Add(hBox, flag=wx.EXPAND | wx.LEFT | wx.RIGHT | wx.TOP, border=10) 
     vBox.Add((-1, 10)) 

     hBox2 = wx.BoxSizer(wx.HORIZONTAL) 
     hBox2.Add(wx.StaticText(panel, label="URLs:")) 
     vBox.Add(hBox2, flag=wx.LEFT, border=10) 
     vBox.Add((-1, 5)) 

     hBox3 = wx.BoxSizer(wx.HORIZONTAL) 
     self.urlFld = wx.TextCtrl(panel, style=wx.TE_MULTILINE, size=(-1, 295)) 
     hBox3.Add(self.urlFld, 1, flag=wx.EXPAND) 
     vBox.Add(hBox3, flag=wx.EXPAND | wx.LEFT | wx.RIGHT, border=10) 


     panel.SetSizer(vBox) 

    # GUI EVENTS 
    def checkBtnClick(self, e): 
     self.urlFld.SetValue("blahh") 

    # MENU ITEM EVENTS 
    def OnAbout(self, e): 
     dlg = wx.MessageDialog(self, "A small text editor", 
           "My test editor", wx.OK) # create a dialog (dlg) box to display the message, and ok button 
     dlg.ShowModal() # show the dialog box, modal means cannot do anything on the program until clicks ok or cancel 
     dlg.Destroy() # destroy the dialog box when its not needed 

    def OnExit(self, e): 
     self.Close(True) # on menu item select, close the app frame. 

    def OnOpen(self, e): 
     self.file_open() 
     e.Skip() 

    def file_open(self): # 9 
     with wx.FileDialog(self, "Choose a file to open", self.dirname, 
          "", "*.*", wx.OPEN) as dlg: 
      if dlg.ShowModal() == wx.ID_OK: 
       directory, filename = dlg.GetDirectory(), dlg.GetFilename() 
       self.urlFld.LoadFile('/'.join((directory, filename))) 
       self.SetTitle(filename) 

app = wx.App(False) # creates a new app 
MainWindow(None, "URL Checker") # give the frame a title 
app.MainLoop() # start the apps mainloop which handles app events