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I am a beginner in Gtk and Python both. I am using Python 2.7.14 and Pygobject(pygi-aio-3.24.1_rev1-setup). I have a working program that can call other window, show that window and close the original window. Which is as follows: This is the main program.

 #!/usr/bin/python # coding=utf8 from gi.repository import GObject, Gio, Gdk, Gtk import blnkwin1 class MyApplication(Gtk.Application): # Main initialization routine def __init__(self, application_id, flags): Gtk.Application.__init__(self, application_id=application_id, flags=flags) self.connect("activate", self.new_window) def new_window(self, *args): AppWindow(self) class AppWindow(object): def __init__(self, application): self.Application = application # Read GUI from file and retrieve objects from Gtk.Builder try: GtkBuilder = Gtk.Builder.new_from_file("Lgnwin.glade") GtkBuilder.connect_signals(blnkwin.lgn(application,GtkBuilder)) except GObject.GError: print("Error reading GUI file") raise # Fire up the main window self.MainWindow = GtkBuilder.get_object("LoginWindow") self.MainWindow.set_application(application) self.MainWindow.show() if GtkBuilder.get_application.get_window_by_id(2): GtkBuilder.get_application.get_window_by_id(2).destroy() def close(self, *args): self.MainWindow.destroy() # Starter def main(): # Initialize GTK Application Application = MyApplication("com.b.example", Gio.ApplicationFlags.FLAGS_NONE) # Start GUI Application.run() if __name__ == "__main__": main()

This is glade file Lgnwin.glade:

<?xml version="1.0" encoding="UTF-8"?> <!-- Generated with glade 3.19.0 --> <interface> <requires lib="gtk+" version="3.12"/> <object class="GtkApplicationWindow" id="LoginWindow"> <property name="width_request">800</property> <property name="height_request">600</property> <property name="can_focus">False</property> <property name="resizable">False</property> <property name="icon">icon100.png</property> <child> <object class="GtkGrid" id="grid1"> <property name="visible">True</property> <property name="can_focus">False</property> <child> <object class="GtkBox" id="box1"> <property name="visible">True</property> <property name="can_focus">False</property> <property name="halign">center</property> <property name="valign">center</property> <property name="hexpand">True</property> <property name="vexpand">True</property> <property name="orientation">vertical</property> <child> <object class="GtkLabel" id="label1"> <property name="visible">True</property> <property name="can_focus">False</property> <property name="vexpand">True</property> <property name="label" translatable="yes">लॉगीन करा</property> <attributes> <attribute name="font-desc" value="Mangal 16"/> </attributes> </object> <packing> <property name="expand">False</property> <property name="fill">True</property> <property name="position">0</property> </packing> </child> <child> <object class="GtkLabel" id="label2"> <property name="visible">True</property> <property name="can_focus">False</property> <property name="margin_top">5</property> <property name="margin_bottom">5</property> <property name="label" translatable="yes">युजरनेम</property> <attributes> <attribute name="font-desc" value="&lt;Enter Value&gt; 14"/> <attribute name="foreground" value="#201f4a4a8787"/> </attributes> </object> <packing> <property name="expand">False</property> <property name="fill">True</property> <property name="position">1</property> </packing> </child> <child> <object class="GtkEntry" id="uname"> <property name="visible">True</property> <property name="can_focus">True</property> <property name="margin_top">2</property> <property name="margin_bottom">2</property> </object> <packing> <property name="expand">False</property> <property name="fill">True</property> <property name="position">2</property> </packing> </child> <child> <object class="GtkLabel" id="label3"> <property name="visible">True</property> <property name="can_focus">False</property> <property name="margin_top">5</property> <property name="margin_bottom">5</property> <property name="label" translatable="yes">पासवर्ड</property> <attributes> <attribute name="font-desc" value="&lt;Enter Value&gt; 14"/> <attribute name="foreground" value="#201f4a4a8787"/> </attributes> </object> <packing> <property name="expand">False</property> <property name="fill">True</property> <property name="position">3</property> </packing> </child> <child> <object class="GtkEntry" id="pswd"> <property name="visible">True</property> <property name="can_focus">True</property> <property name="margin_top">2</property> <property name="margin_bottom">2</property> <property name="visibility">False</property> <property name="invisible_char">●</property> </object> <packing> <property name="expand">False</property> <property name="fill">True</property> <property name="position">4</property> </packing> </child> <child> <object class="GtkButton" id="loginbtn"> <property name="label" translatable="yes">लॉगीन</property> <property name="visible">True</property> <property name="can_focus">True</property> <property name="receives_default">True</property> <property name="margin_top">10</property> <signal name="clicked" handler="loginbtn_clicked_cb" swapped="no"/> </object> <packing> <property name="expand">False</property> <property name="fill">True</property> <property name="position">5</property> </packing> </child> </object> <packing> <property name="left_attach">1</property> <property name="top_attach">1</property> </packing> </child> <child> <placeholder/> </child> <child> <placeholder/> </child> <child> <placeholder/> </child> </object> </child> </object> </interface>

This is another file in which I am handling button click and also calling next window:

from gi.repository import GObject, Gio, Gdk, Gtk class lgn(object): def __init__(self, application, builder): self.Application = application def loginbtn_clicked_cb(self, button): builder = Gtk.Builder.new_from_file("blankwin.glade") builder.connect_signals(self) self.lgnwins = builder.get_object("applicationwindow1") self.lgnwins.set_application(self.Application) self.Application.get_window_by_id(2).set_visible(True) self.Application.get_window_by_id(1).destroy()

This is glade file for second window blankwin.glade:

<?xml version="1.0" encoding="UTF-8"?> <!-- Generated with glade 3.19.0 --> <interface> <requires lib="gtk+" version="3.12"/> <object class="GtkApplicationWindow" id="applicationwindow1"> <property name="can_focus">False</property> <property name="default_width">800</property> <property name="default_height">600</property> <child> <object class="GtkLabel" id="label1"> <property name="visible">True</property> <property name="can_focus">False</property> <property name="label" translatable="yes">This is Just a blank Window</property> </object> </child> </object> </interface>

This program is working alright. But has several fetal flaws.My problem is:

  1. When switching to another window UI is showing the first window closes and second window opens which is totally unacceptable to any user. I don't think I am switching to other window correctly. What is the authentic way to switch windows in Gtk.Application way of doing things? I could not find correct reference anywhere on web. Couldn't find any examples.

  2. I also want to go back to my first window as this application will have menu bar and user will return after doing the task back to the main window. How do I do that? Any Examples would be helpful.

Some Labels are not in english don't mind them.Thanks in Advance.

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    "the first window closes and second window opens which is totally unacceptable to any user" -- if you destroy the current window and show another, that sounds like everything is working as you requested. You need to explain what you expect to happen. Commented Jan 2, 2018 at 18:36
  • I am trying to switch to next window. I want to go to next window like any other normal application will. My app will have login window then main menu window where I will put menu bar on top. from there user need to open different windows with different menus and get back to main menu after doing the task. My code is not doing that and I could not find any way to do it. Commented Jan 3, 2018 at 4:09
  • Do you want both first and second window open at the same time? Or just one window at a time? Commented Jan 4, 2018 at 17:37
  • I want one window at a time. My problem is I think I am not using Gtk.Application as it is intended to be used. There must be a right way to change windows. I cant figure out how. None of the tutorials show how to manage multiple windows and how to change between them. Any resources or example will be very helpful. Commented Jan 5, 2018 at 13:02
  • This could become a lengthy conversation. Why don't you see me in Gtk chat? Commented Jan 6, 2018 at 3:09

1 Answer 1

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Here is the .py file

#!/usr/bin/env python3 import gi gi.require_version('Gtk', '3.0') from gi.repository import Gtk import os, sys UI_FILE = "pygtk_stack.ui" class GUI: def __init__(self): self.builder = Gtk.Builder() self.builder.add_from_file(UI_FILE) self.builder.connect_signals(self) self.stack = Gtk.Stack() self.stack.set_transition_type(Gtk.StackTransitionType.CROSSFADE) self.view_one = self.builder.get_object('box1') self.view_two = self.builder.get_object('box2') self.stack.add_named(self.view_one, "view one" ) self.stack.add_named(self.view_two, "view two" ) window = self.builder.get_object('window') window.add(self.stack) window.show_all() def view_two_activated (self, meuitem): self.stack.set_visible_child(self.view_two) def view_one_clicked (self, button): self.stack.set_visible_child(self.view_one) def on_window_destroy(self, window): Gtk.main_quit() def main(): app = GUI() Gtk.main() if __name__ == "__main__": sys.exit(main())

And the pygtk_stack.ui file:

<?xml version="1.0" encoding="UTF-8"?> <!-- Generated with glade 3.18.3 --> <interface> <requires lib="gtk+" version="3.12"/> <object class="GtkBox" id="box1"> <property name="visible">True</property> <property name="can_focus">False</property> <property name="orientation">vertical</property> <child> <object class="GtkMenuBar" id="menubar1"> <property name="visible">True</property> <property name="can_focus">False</property> <child> <object class="GtkMenuItem" id="menuitem3"> <property name="visible">True</property> <property name="can_focus">False</property> <property name="label" translatable="yes">_View</property> <property name="use_underline">True</property> <child type="submenu"> <object class="GtkMenu" id="menu1"> <property name="visible">True</property> <property name="can_focus">False</property> <child> <object class="GtkMenuItem" id="menuitem1"> <property name="visible">True</property> <property name="can_focus">False</property> <property name="label" translatable="yes">View 2</property> <property name="use_underline">True</property> <signal name="activate" handler="view_two_activated" swapped="no"/> </object> </child> </object> </child> </object> </child> </object> <packing> <property name="expand">False</property> <property name="fill">True</property> <property name="position">0</property> </packing> </child> <child> <placeholder/> </child> </object> <object class="GtkBox" id="box2"> <property name="visible">True</property> <property name="can_focus">False</property> <property name="orientation">vertical</property> <child> <object class="GtkButton" id="button1"> <property name="label" translatable="yes">Go back</property> <property name="visible">True</property> <property name="can_focus">True</property> <property name="receives_default">True</property> <signal name="clicked" handler="view_one_clicked" swapped="no"/> </object> <packing> <property name="expand">False</property> <property name="fill">True</property> <property name="position">0</property> </packing> </child> <child> <object class="GtkLabel" id="label1"> <property name="visible">True</property> <property name="can_focus">False</property> <property name="label" translatable="yes">Second view</property> </object> <packing> <property name="expand">False</property> <property name="fill">True</property> <property name="position">1</property> </packing> </child> </object> <object class="GtkWindow" id="window"> <property name="visible">True</property> <property name="can_focus">False</property> <property name="title" translatable="yes">window</property> <property name="default_width">500</property> <property name="default_height">400</property> <signal name="destroy" handler="on_window_destroy" swapped="no"/> <child> <placeholder/> </child> </object> </interface>

My version of glade does not support GtkStack, so this example is a bit hacky. Hopefully you can figure out what you need. I added a transition you can disable if you don't like it.

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6 Comments

This is how I want it but this does not use Gtk.Application. I was thinking of using ApplicationWindow with Gtk.Application. Is it possible to do this with Gtk.Application class?
Do you specifically need a GtkApplication? Not to doubt you or anything, just making sure.
@RohitS Which feature of GtkApplication do you need?
I was expecting a central object where I can add and remove my glade files as needed. I was expecting MVC kind of arch. I read this page- python-gtk-3-tutorial.readthedocs.io/en/latest/application.html This sounds like Gtk.Application is made to do things like this. This is why I wanted Gtk.Application.
@RohitS If you are looking to have MVC type application, GtkApplication is not going to do anything for you (but create more work). Please post a new question elaborating on what you already told me, link back here, and I will try to help you.
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