[Deskbar] Drag & Drop for preferences dialog

[Sebastian Pölsterl <marduk k-d-w org>]

Hi!

I wrote a first preview of the DnD feature.

It currently only works for local Python files. Just drag one onto the
handlers' list and it will be copyied to
~/.gnome2/deskbar-applet/handlers, loaded and initialized.

There's still a lot of work to do to achieve usability, though.
My plan is to let it look like the theme manager in the end.

-- 
Greetings,
Sebastian Pölsterl

### Eclipse Workspace Patch 1.0
#P deskbar-applet
Index: deskbar/ui/DeskbarPreferencesUI.py
===================================================================
RCS file: /cvs/gnome/deskbar-applet/deskbar/ui/DeskbarPreferencesUI.py,v
retrieving revision 1.23
diff -u -r1.23 DeskbarPreferencesUI.py
--- deskbar/ui/DeskbarPreferencesUI.py	29 Aug 2006 15:28:19 -0000	1.23
+++ deskbar/ui/DeskbarPreferencesUI.py	1 Oct 2006 11:21:30 -0000
@@ -1,7 +1,9 @@
 from gettext import gettext as _
 from os.path import join
+import shutil
 import struct
 import gtk, gtk.gdk, gtk.glade, gobject, gconf
+import gnomevfs
 import deskbar, deskbar.Utils
 from deskbar.ui.ModuleListView import ModuleListView
 from deskbar import CUEMIAC_UI_NAME, ENTRIAC_UI_NAME, WINDOW_UI_NAME
@@ -202,6 +204,19 @@
 		self.use_selection_box.connect('toggled', self.on_use_selection_toggled, applet)
 		self.use_selection_id = deskbar.GCONF_CLIENT.notify_add(applet.prefs.GCONF_USE_SELECTION, lambda x, y, z, a: self.on_config_use_selection(z.value))
 		
+		# Setup Drag & Drop
+		big_box = self.glade.get_widget("big_box")
+		self.TARGET_URI_LIST, self.TARGET_NS_URL = range(2)
+		DROP_TYPES = [('text/uri-list', 0, self.TARGET_URI_LIST),
+			          ('_NETSCAPE_URL', 0, self.TARGET_NS_URL),
+			         ]
+		big_box.drag_dest_set(gtk.DEST_DEFAULT_ALL, DROP_TYPES,
+							  gtk.gdk.ACTION_COPY | gtk.gdk.ACTION_LINK | gtk.gdk.ACTION_MOVE)
+		big_box.connect("drag_data_received",
+		                      self.on_drag_data_received_data)
+		big_box.connect("drag_motion", self.on_drag_motion)
+		big_box.connect("drag_leave", self.on_drag_leave)
+		
 		self.sync_ui()
 		
 	def show_run_hide(self):
@@ -368,6 +383,40 @@
 			loader.stop_module_async (context)
 		else:
 			loader.initialize_module_async (context)
+			
+	def on_drag_motion(self, widget, drag_context, x, y, timestamp):
+		return False
+	
+	def on_drag_leave(self, big_box, drag_context, timestamp):
+		big_box.queue_draw()
+		
+	def on_drag_data_received_data(self, widget, context, x, y, selection, info, etime):
+		"""
+		http://cvs.gnome.org/viewcvs/gnome-control-center/capplets/theme-switcher/gnome-theme-manager.c?view=markup
+		"""
+		if (not(info == self.TARGET_URI_LIST or info == self.TARGET_NS_URL)):
+			return
+		
+		uri = gnomevfs.URI(selection.data.strip())
+		
+		if (uri.is_local == 1):
+			local_path = uri.path
+			copy_file = True
+		else:
+			# TODO: Download
+			return
+		
+		if not gnomevfs.get_mime_type(local_path) == "text/x-python":
+			return
+			
+		if copy_file:
+			shutil.copy(local_path, deskbar.USER_HANDLERS_DIR[0])
+		handlers_path = join(deskbar.USER_HANDLERS_DIR[0], uri.short_name)
+			
+		module_context = self.module_loader.load(handlers_path)
+		self.module_loader.initialize_module(module_context)
+		
+		return
 			
 def show_preferences(applet, loader, model):
 	DeskbarPreferencesUI(applet, loader, model).show_run_hide()