title: GTK3 Dialog in Python, "enter key" on a Gtk.Entry should trigger the OK Button
body: <p>I have following code written in Python with Gtk3.</p>
  
  <pre><code>from gi.repository import Gtk
  
  class DialogTaskDescription(Gtk.Dialog):
  
      def __init__(self):
          Gtk.Dialog.__init__(self, "Create ToDo.txt Entry", 0, 0,
              (Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
               Gtk.STOCK_OK, Gtk.ResponseType.OK))
  
          self.set_default_size(150, 100)
  
          hbox = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL, spacing=6)
  
          self.label = Gtk.Label("Task Description:")
          self.taskDescription = Gtk.Entry()
          hbox.pack_start(self.label, False, True, 0)
          hbox.pack_start(self.taskDescription, True, True, 0)
  
          box = self.get_content_area()
          box.add(hbox)
          self.show_all()
  
      def getTaskDescription(self):
          return self.taskDescription.get_text()
  
  class TaskDescription:
  
      def __init__(self):
          self.dialog = DialogTaskDescription()
  
      def getTaskDescription(self):
          response = self.dialog.run()
          taskDescription = ''
  
          if response == Gtk.ResponseType.OK:
              taskDescription = self.dialog.getTaskDescription()
  
          self.dialog.destroy()
  
          return taskDescription
  </code></pre>
  
  <p>Now I would like to trigger a click on the OK-button if the user press the enter key on the "taskDescription" entry field. Any idea how I could do this? Thanks a lot!</p>
  
  <p>EDIT:</p>
  
  <p>I found a solution... Not sure if it is the way it should be done, but this works:</p>
  
  <p>I added following lines to the init method of DialogTaskDescription():</p>
  
  <pre><code># enter key should trigger the default action
  self.taskDescription.set_activates_default(True)
  
  # make OK button the default
  okButton = self.get_widget_for_response(response_id=Gtk.ResponseType.OK)
  okButton.set_can_default(True)
  okButton.grab_default()
  </code></pre>