"""From http://sebsauvage.net/python/gui/"""

import wx


class my_wx_app(wx.Frame):
    """This class holds the main window"""

    def __init__(self, parent, id, title):
        """We use the parent constructor and keep track of our parent"""
        wx.Frame.__init__(self, parent, id, title)
        self.parent = parent
        self.initialise()

    def initialise(self):
        """To separate GUI from logic, we create widgets here"""
        # Create the layout manager
        sizer = wx.GridBagSizer()
        
        # Create and keep a reference to a text entry
        self.entry = wx.TextCtrl(self, -1, value=u"Entrer du texte ici.")
        sizer.Add(self.entry, (0,0), (1,1), wx.EXPAND)
        self.Bind(wx.EVT_TEXT_ENTER, self.OnPressEnter, self.entry)
        
        # Create a button
        button = wx.Button(self, -1, label="Cliques moi !")
        sizer.Add(button, (0,1))
        self.Bind(wx.EVT_BUTTON, self.OnButtonClick, button)
        
        # Create a label
        self.label = wx.StaticText(self, -1, label=u"Salut !")
        self.label.SetBackgroundColour(wx.BLUE)
        self.label.SetForegroundColour(wx.WHITE)
        sizer.Add(self.label, (1,0), (1,2), wx.EXPAND)

        # Allow content to be resized with window
        sizer.AddGrowableCol(0)
        self.SetSizerAndFit(sizer)

        # Enable resizing horizontally, not vertically
        self.SetSizeHints(-1, self.GetSize().y, -1, self.GetSize().y)
        
        # Default focus to the text entry
        self.entry.SetFocus()
        self.entry.SetSelection(-1, -1)
        self.Show(True)

    def OnButtonClick(self, event):
        self.label.SetLabel(self.entry.GetValue() + " (bouton)")
        self.entry.SetFocus()
        self.entry.SetSelection(-1, -1)

    def OnPressEnter(self, event):
        self.label.SetLabel(self.entry.GetValue() + " (entrée)")
        self.entry.SetFocus()
        self.entry.SetSelection(-1, -1)


if __name__ == "__main__":
    app = wx.App()
    frame = my_wx_app(None, -1, "My wxWidget application")
    app.MainLoop()