wxpython, open file and display text into textctrl area

• Pretty new to wxpython so i am struggling with this. I have got a little way with the help of tutorials and trying to learn.

  I have an "open" in my file menu, and i am trying to get it so that when i open a file, the text in the file will be shown in my multiline textctrl box

  I have tried a few bits such as WriteText() and SetValue() but can't get it to display.

  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
  

  thanks

• Tags: wxpython
• Category: Programming
• Last Update: 2015-09-16
• Source: stackoverflow.com

 

Answers

By: Anna

Score: 1

•  

  urlFld should be an attribute of the class:

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

  and not a local variable so that you can reference it outside the method.

   

By: Yoriz

Score: 0

•  

  Dont use Global variables use self instead here is modified code

  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
  

   

By: Mike Driscoll

Score: -1

•  

  There are a couple of approaches you can take. The harder of the two will be to create a parser for the value inself.stext. However this will also be the most flexible method, depending on how complex your calculator becomes. The easier method would be to use Python's eval builtin. Some people say that eval is dangerous as it can execute arbitrary code (which is true), but since you will control what goes into the text control, you should be able to keep anything bad from happening. If you use eval, then you can just do something like this:

  answer = eval( self.stext.GetValue() )
  

  For more information, please see the documentation.

   

By: Steve Barnes

Score: -1

•  

  You need to keep references to your controls - then you can set them:

  import wx
  
  class example(wx.Frame):
      def __init__(self,parent,id):
          wx.Frame.__init__(self,parent,id,' Title', size = (205,330))
          panel = wx.Panel(self, wx.ID_ANY)
          self.textctrl = wx.TextCtrl(panel, -1,(""), pos=(10, 10),size=(170, 60))
          self.button=wx.Button(panel,label="1",pos=(100,210),size=(30,30))
          self.Bind(wx.EVT_BUTTON, self.OnButton, self.button)
      def OnButton (self,evt):
          label = evt.GetEventObject().GetLabel()
          #self.textctrl.SetValue(label)
          self.textctrl.AppendText(label)
  
  
  if __name__=='__main__':
      app=wx.PySimpleApp()
      frame=example(parent=None,id=-1)
      frame.Show()
      app.MainLoop()