diff --git a/gui.py b/gui.py
new file mode 100644
index 0000000..1d9f76e
--- /dev/null
+++ b/gui.py
@@ -0,0 +1,183 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+from gi.repository import Gtk, Gio
+
+import os.path
+import sys
+
+# Internationalization support
+import gettext
+import locale
+
+
+if os.path.exists('locale/po') and os.path.exists('res'):
+    # We're in the development tree
+    DIR = "locale/po/"
+    RESOURCES = "res/"
+
+elif sys.platform != 'win32' and sys.platform != 'darwin':
+    DIR = "/usr/share/locale/"
+    RESOURCES = "/usr/local/share/jsoninspector"
+
+else:
+    DIR = "po"
+    RESOURCES = "res/"
+
+# Internationalization code, we'll cross that bridge when we get there
+# APP = "smallprint"
+#
+#
+# locale.setlocale(locale.LC_ALL, '')
+#
+# gettext.bindtextdomain(APP, DIR)
+# locale.bindtextdomain(APP, DIR)
+#
+#
+# gettext.textdomain(APP)
+# _ = gettext.gettext
+#
+
+
+class MainWindowMethods(Gtk.Application):
+    """
+    Main Application object with the main window signals
+    """
+    def __init__(self):
+        Gtk.Application.__init__(self, application_id="apps.gnome.smallprint",
+                                 flags=Gio.ApplicationFlags.FLAGS_NONE)
+
+        self.connect("activate", self.on_app_start)
+
+    def on_app_start(self, data=None):
+        """
+        Loads the MainWindow widgets, shows it up and starts the main loop
+        """
+        self.builder = Gtk.Builder()
+        # self.builder.set_translation_domain(APP)
+        self.builder.add_from_file(os.path.join(RESOURCES, 'smallprint.gtkbuilder'))
+        self.builder.connect_signals(self)
+
+        # We get the window and show it
+        self.window = self.builder.get_object("MainWindow")
+        self.add_window(self.window)
+        self.window.show_all()
+
+    def onOpenMenuClicked(self, event):
+        """
+        User has pressed Open in the menu
+        """
+        # Create the FileChooser Dialog
+        chooser = Gtk.FileChooserDialog(_("Open JSON text file"), self.window,
+                                        Gtk.FileChooserAction.OPEN,
+                                        (Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
+                                        Gtk.STOCK_OPEN, Gtk.ResponseType.OK))
+
+        # Launch it
+        response = chooser.run()
+
+        # If we choose a file, we load it
+        if response == Gtk.ResponseType.OK:
+            filename = chooser.get_filename()
+            label = self.builder.get_object("StatusLabel")
+
+            # We update the statusbar accordingly to what has happened
+            if self.logicObj.loadjson(filename):
+
+                label.set_text(filename)
+                treeStore = self.builder.get_object("treestore1")
+                treeStore.clear()
+                self.logicObj.loadTree(treeStore)
+
+            else:
+
+                label.set_text(_("No JSON loaded."))
+
+        # We finish the dialog
+        chooser.destroy()
+
+    def onCopyJSONClicked(self, widget):
+        """
+        User asked to paste a JSON code
+        """
+        # Show up the TextWindow
+        textWindow = self.builder.get_object("TextWindow")
+        textWindow.show_all()
+
+    def onCopyJSONDelete(self, widget, event):
+        """
+        We've been told to close the CopyJSON Window
+        """
+        textWindow = self.builder.get_object("TextWindow")
+        textWindow.hide()
+
+        return True
+
+    def onCopyJSONDestroy(self, widget):
+        """
+        We've been tasked with removing the CopyJSON window
+        """
+        textWindow = self.builder.get_object("TextWindow")
+        textWindow.hide()
+
+        return True
+
+    def onCopyJSONAcceptClicked(self, widget):
+        """
+        The input is finished and accepted.
+        """
+        textView = self.builder.get_object("textview1")
+        jsonBuffer = textView.get_buffer()
+        jsonText = jsonBuffer.get_text(jsonBuffer.get_start_iter(),
+                                       jsonBuffer.get_end_iter(), True)
+
+        textWindow = self.builder.get_object("TextWindow")
+        textWindow.hide()
+        treestore = self.builder.get_object("treestore1")
+        treestore.clear()
+
+        if self.logicObj.loadJSONText(jsonText):
+
+            status_label = self.builder.get_object("StatusLabel")
+            status_label.set_text(_("Loaded from the clipboard."))
+            self.logicObj.loadTree(treestore)
+
+    def onCopyJSONCancelClicked(self, widget):
+        """
+        The user changed its mind and pressed cancel
+        """
+        textWindow = self.builder.get_object("TextWindow")
+        textWindow.hide()
+
+    def onExitMenuClicked(self, widget):
+        """
+        Menu option Exit has been clicked
+        """
+        self.quit()
+
+    def onAboutMenuActivate(self, widget):
+        """
+        About option clicked
+        """
+        about_dialog = self.builder.get_object("AboutDialog")
+        about_dialog.run()
+        about_dialog.hide()
+
+    def onMainWindowDelete(self, widget, event):
+        """
+        Our MainWindow has been deleted or closed
+        """
+        pass
+
+    def onAboutDialogClose(self, widget, event=None):
+        pass
+
+    def onAboutDialogDeleteEvent(self, widget, event=None):
+        pass
+
+
+# Main procedure
+if __name__ == "__main__":
+
+    mainWindow = MainWindowMethods()
+    mainWindow.run(None)