title: GTK Label wrapping in a dialog
body: <p>I'm trying to create a <strong>non-resizable dialog</strong> with a label in it.  This label has a lot of text, so I want it to <strong>wrap without making the dialog ridiculously wide</strong>.</p>
  
  <p>For some reason, I can't find out what it takes to get GTK to allow this to happen.  I can't even find a way of setting a max-width on the dialog, which would be great.</p>
  
  <p>Here's an running example of what I mean:</p>
  
  <pre><code>#!/usr/bin/env python
  #-*- coding:utf-8 -*-
  
  from gi.repository import Gtk
  
  class DialogExample(Gtk.Dialog):
  
      def __init__(self, parent):
          Gtk.Dialog.__init__(self, "My Dialog", parent, 0,
              (Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
               Gtk.STOCK_OK, Gtk.ResponseType.OK))
  
          self.set_default_size(150, 100)
          self.set_resizable(False)
  
          label = Gtk.Label("This is a dialog to display additional information, with a bunch of text in it just to make sure it will wrap enough for demonstration purposes")
          label.set_line_wrap(True)
  
          box = self.get_content_area()
          box.add(label)
          self.show_all()
  
  class DialogWindow(Gtk.Window):
  
      def __init__(self):
          Gtk.Window.__init__(self, title="Dialog Example")
  
          self.set_default_size(250, 200)
  
  
          button = Gtk.Button("Open dialog")
          button.connect("clicked", self.on_button_clicked)
  
          self.add(button)
  
      def on_button_clicked(self, widget):
          dialog = DialogExample(self)
          response = dialog.run()
  
          if response == Gtk.ResponseType.OK:
              print "The OK button was clicked"
          elif response == Gtk.ResponseType.CANCEL:
              print "The Cancel button was clicked"
  
          dialog.destroy()
  
  win = DialogWindow()
  win.connect("delete-event", Gtk.main_quit)
  win.show_all()
  Gtk.main()
  </code></pre>