My first wxPython App with Twisted

koranthala koranthala at gmail.com
Wed Aug 5 03:39:49 CEST 2009


On Aug 5, 6:29 am, koranthala <koranth... at gmail.com> wrote:
> Hi,
>    I am creating the first GUI app (wxPython based) using Twisted.
>    I am facing an issue which I cannot seem to solve/understand due
> to lack of trace or anything.
>
>    I had a big app written on twisted and now I am creating a login
> screen to the app.
>    The app used to work without any issues. I added the login screen
> and the login screen comes up.
>     But then everything freezes up. I have to force quit the python
> application to get anything back. Can anyone help me solve it?
>
>    The code is as follows:
>
> import wx
> import os
> import logging
>
> from twisted.internet import wxreactor
> wxreactor.install()
> from twisted.internet import reactor #Called only after
> wxreactor.install()
> from twisted.internet.task import LoopingCall
>
> import clientapp
>
> def opj(path):
>    """ Convert paths to the platform-specific separator """
>    st = apply(os.path.join, tuple(path.split('/')))
>    if path.startswith('/'):
>        st = '/' + st
>    return st
>
> class APPApp(wx.App):
>    def OnInit(self):
>        self.frame = APPFrame(None, -1, " APP Login", size=(200, 150))
>        self.panel = APPPanel(self.frame,-1)
>        #client.run method does the verification etc along with other
> items
>        client = clientapp.setup_app()
>        call = LoopingCall(client.run)
>        call.start(.51)
>        return True
>
> def main():
>    app = APPApp(0)
>    reactor.registerWxApp(app)
>    try:
>        reactor.run()
>    except StandardError:
>        raise
>
> class APPPanel(wx.Panel):
>    """ APP GUI PANEL
>
>    The panel in which the user name and password is typed.
>    @var ID_LOGIN: Login buttons id. When this button is clicked, the
> data
>        is stored for logging.
>
>    """
>    ID_LOGIN = wx.NewId()
>
>    def __init__(self, parent, id):
>        self.parent = parent
>        wx.Panel.__init__(self, parent, id, size=(200,150))
>        self.quote = wx.StaticText(self, -1, "APP Login",wx.Point(60,
> 10))
>        wx.StaticText(self, wx.ID_ANY, "User Name ", wx.Point(20, 33))
>        wx.StaticText(self, wx.ID_ANY, "Password ", wx.Point(20, 58))
>        self.usernameBox = wx.TextCtrl(self, wx.ID_ANY, "",
> wx.Point(80, 31), wx.Size(100, wx.ID_ANY))
>        self.usernameBox.SetFocus()
>        self.passwordBox = wx.TextCtrl(self, wx.ID_ANY, "",
> wx.Point(80, 56), wx.Size(100, wx.ID_ANY), style=wx.TE_PASSWORD)
>        self.button =wx.Button(self, self.ID_LOGIN, "Login", wx.Point
> (60, 88))
>        wx.EVT_BUTTON(parent, self.ID_LOGIN, self.on_login)
>
>    def on_login(self, event):
>        username = self.usernameBox.GetString(0, 128)
>        password = self.passwordBox.GetString(0, 128)
>        if username and password:
>            self.parent.on_login_click(username, password)
>
> class APPTaskBarIcon(wx.TaskBarIcon):
>    ''' TaskBar Icon
>
>    So that the application is always alive on the taskbar.
>    3 operations are possible, DoubleClick on the taskbar would bring
> up the
>    window, right click will bring up options to restore or exit the
> tool.
>
>    '''
>    TBMENU_RESTORE = wx.NewId()
>    TBMENU_CLOSE   = wx.NewId()
>
>    def __init__(self, frame):
>        wx.TaskBarIcon.__init__(self)
>        self.frame = frame
>        # Set the image
>        icon = self.MakeIcon(self.frame.get_image())
>        self.SetIcon(icon, "APP")
>        self.imgidx = 1
>        # bind some events
>        self.Bind(wx.EVT_TASKBAR_LEFT_DCLICK, self.OnTaskBarActivate)
>        self.Bind(wx.EVT_MENU, self.OnTaskBarActivate,
> id=self.TBMENU_RESTORE)
>        self.Bind(wx.EVT_MENU, self.OnTaskBarClose,
> id=self.TBMENU_CLOSE)
>
>    def CreatePopupMenu(self):
>        """ Right Click Popup Menu
>
>        This method is called by the base class when it needs to popup
>        the menu for the default EVT_RIGHT_DOWN event.
>
>        """
>        menu = wx.Menu()
>        menu.Append(self.TBMENU_RESTORE, "Restore Window")
>        menu.Append(self.TBMENU_CLOSE, "Exit APP")
>        return menu
>
>    def MakeIcon(self, img):
>        """ Return the generated Icon.
>
>        This function is required because various platforms have
> different
>        requirements for the icon size.
>
>        """
>        if "wxMSW" in wx.PlatformInfo:
>            img = img.Scale(16, 16)
>        elif "wxGTK" in wx.PlatformInfo:
>            img = img.Scale(22, 22)
>        icon = wx.IconFromBitmap(img.ConvertToBitmap() )
>        return icon
>
>    def OnTaskBarActivate(self, evt):
>        ''' Activation code - say DoubleClick etc. It raises the window
> '''
>        if self.frame.IsIconized():
>            self.frame.Iconize(False)
>        if not self.frame.IsShown():
>            self.frame.Show(True)
>        self.frame.Raise()
>
>    def OnTaskBarClose(self, evt):
>        ''' On right click and close, the frame itself is closed '''
>        wx.CallAfter(self.frame.Close)
>
> class APPFrame(wx.Frame):
>    def __init__(self, parent, id, title, size=None):
>        wx.Frame.__init__(self, parent, id, title,
>                          size=size, pos=wx.Point(400, 300))
>        icon = self.get_icon()
>        self.SetIcon(icon)
>        self.tbicon = APPTaskBarIcon(self)
>        self.Show(True)
>        self.Bind(wx.EVT_CLOSE, self.OnCloseWindow)
>        self.Bind(wx.EVT_ICONIZE, self.OnIconify)
>
>    def on_login_click(self, username, password):
>        self.Hide()
>
>    def OnCloseWindow(self, event):
>        if self.tbicon is not None:
>            self.tbicon.Destroy()
>        event.Skip()
>
>    def OnIconify(self, event):
>        self.Hide()
>
>    def get_image(self):
>        img= wx.Image(opj('client.ico'), wx.BITMAP_TYPE_ICO)
>        return img
>
>    def get_icon(self):
>        img = self.get_image()
>        icon = wx.IconFromBitmap(img.ConvertToBitmap() )
>        return icon
>
> if __name__ == '__main__':
>    main()
>
> --------------
> If somebody can help me out, I would be much obliged.

Please disregard this mail. I will post a barebones version separately.



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