[pitivi] greeter: Open project file dragged from Nautilus

[Alexandru Băluț <alexbalut src gnome org>]

commit 817d885a4daa8d8887ffcfc2f004b6ce1348c77d
Author: HarishFulara07 <harish14143 iiitd ac in>
Date:   Sat Aug 4 18:23:49 2018 +0530

    greeter: Open project file dragged from Nautilus

 pitivi/greeterperspective.py | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
---
diff --git a/pitivi/greeterperspective.py b/pitivi/greeterperspective.py
index eacc9c7e..53be72b4 100644
--- a/pitivi/greeterperspective.py
+++ b/pitivi/greeterperspective.py
@@ -35,6 +35,7 @@ from pitivi.utils.ui import beautify_last_updated_timestamp
 from pitivi.utils.ui import beautify_project_path
 from pitivi.utils.ui import fix_infobar
 from pitivi.utils.ui import GREETER_PERSPECTIVE_CSS
+from pitivi.utils.ui import URI_TARGET_ENTRY
 
 MAX_RECENT_PROJECTS = 10
 
@@ -120,6 +121,9 @@ class GreeterPerspective(Perspective):
         builder.add_from_file(os.path.join(get_ui_dir(), "greeter.ui"))
 
         self.toplevel_widget = builder.get_object("toplevel_vbox")
+        self.toplevel_widget.drag_dest_set(
+            Gtk.DestDefaults.ALL, [URI_TARGET_ENTRY], Gdk.DragAction.COPY)
+        self.toplevel_widget.connect("drag-data-received", self.__drag_data_received_cb)
 
         self.__topvbox = builder.get_object("topvbox")
         self.__welcome_vbox = builder.get_object("welcome_vbox")
@@ -298,6 +302,18 @@ class GreeterPerspective(Perspective):
         assert not visible_options
         return menu_button
 
+    def __drag_data_received_cb(self, unused_widget, unused_context, unused_x,
+                                unused_y, data, unused_info, unused_time):
+        """Opens the project file dragged from Nautilus."""
+        uris = data.get_uris()
+        if not uris:
+            return
+
+        uri = uris[0]
+        extension = os.path.splitext(uri)[1][1:]
+        if extension in self.__project_filter:
+            self.app.project_manager.loadProject(uri)
+
     def __new_project_cb(self, unused_action, unused_param):
         self.app.project_manager.newBlankProject()