diff --git a/bitbake/lib/bb/ui/depexp.py b/bitbake/lib/bb/ui/depexp.py
new file mode 100644
index 0000000..240aafc
--- /dev/null
+++ b/bitbake/lib/bb/ui/depexp.py
@@ -0,0 +1,333 @@
+#
+# BitBake Graphical GTK based Dependency Explorer
+#
+# Copyright (C) 2007        Ross Burton
+# Copyright (C) 2007 - 2008 Richard Purdie
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+import sys
+import gobject
+import gtk
+import Queue
+import threading
+import xmlrpclib
+import bb
+import bb.event
+from bb.ui.crumbs.progressbar import HobProgressBar
+
+# Package Model
+(COL_PKG_NAME) = (0)
+
+# Dependency Model
+(TYPE_DEP, TYPE_RDEP) = (0, 1)
+(COL_DEP_TYPE, COL_DEP_PARENT, COL_DEP_PACKAGE) = (0, 1, 2)
+
+
+class PackageDepView(gtk.TreeView):
+    def __init__(self, model, dep_type, label):
+        gtk.TreeView.__init__(self)
+        self.current = None
+        self.dep_type = dep_type
+        self.filter_model = model.filter_new()
+        self.filter_model.set_visible_func(self._filter)
+        self.set_model(self.filter_model)
+        #self.connect("row-activated", self.on_package_activated, COL_DEP_PACKAGE)
+        self.append_column(gtk.TreeViewColumn(label, gtk.CellRendererText(), text=COL_DEP_PACKAGE))
+
+    def _filter(self, model, iter):
+        (this_type, package) = model.get(iter, COL_DEP_TYPE, COL_DEP_PARENT)
+        if this_type != self.dep_type: return False
+        return package == self.current
+
+    def set_current_package(self, package):
+        self.current = package
+        self.filter_model.refilter()
+
+
+class PackageReverseDepView(gtk.TreeView):
+    def __init__(self, model, label):
+        gtk.TreeView.__init__(self)
+        self.current = None
+        self.filter_model = model.filter_new()
+        self.filter_model.set_visible_func(self._filter)
+        self.set_model(self.filter_model)
+        self.append_column(gtk.TreeViewColumn(label, gtk.CellRendererText(), text=COL_DEP_PARENT))
+
+    def _filter(self, model, iter):
+        package = model.get_value(iter, COL_DEP_PACKAGE)
+        return package == self.current
+
+    def set_current_package(self, package):
+        self.current = package
+        self.filter_model.refilter()
+
+
+class DepExplorer(gtk.Window):
+    def __init__(self):
+        gtk.Window.__init__(self)
+        self.set_title("Dependency Explorer")
+        self.set_default_size(500, 500)
+        self.connect("delete-event", gtk.main_quit)
+
+        # Create the data models
+        self.pkg_model = gtk.ListStore(gobject.TYPE_STRING)
+        self.pkg_model.set_sort_column_id(COL_PKG_NAME, gtk.SORT_ASCENDING)
+        self.depends_model = gtk.ListStore(gobject.TYPE_INT, gobject.TYPE_STRING, gobject.TYPE_STRING)
+        self.depends_model.set_sort_column_id(COL_DEP_PACKAGE, gtk.SORT_ASCENDING)
+
+        pane = gtk.HPaned()
+        pane.set_position(250)
+        self.add(pane)
+
+        # The master list of packages
+        scrolled = gtk.ScrolledWindow()
+        scrolled.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
+        scrolled.set_shadow_type(gtk.SHADOW_IN)
+
+        self.pkg_treeview = gtk.TreeView(self.pkg_model)
+        self.pkg_treeview.get_selection().connect("changed", self.on_cursor_changed)
+        column = gtk.TreeViewColumn("Package", gtk.CellRendererText(), text=COL_PKG_NAME)
+        self.pkg_treeview.append_column(column)
+        pane.add1(scrolled)
+        scrolled.add(self.pkg_treeview)
+
+        box = gtk.VBox(homogeneous=True, spacing=4)
+
+        # Runtime Depends
+        scrolled = gtk.ScrolledWindow()
+        scrolled.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
+        scrolled.set_shadow_type(gtk.SHADOW_IN)
+        self.rdep_treeview = PackageDepView(self.depends_model, TYPE_RDEP, "Runtime Depends")
+        self.rdep_treeview.connect("row-activated", self.on_package_activated, COL_DEP_PACKAGE)
+        scrolled.add(self.rdep_treeview)
+        box.add(scrolled)
+
+        # Build Depends
+        scrolled = gtk.ScrolledWindow()
+        scrolled.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
+        scrolled.set_shadow_type(gtk.SHADOW_IN)
+        self.dep_treeview = PackageDepView(self.depends_model, TYPE_DEP, "Build Depends")
+        self.dep_treeview.connect("row-activated", self.on_package_activated, COL_DEP_PACKAGE)
+        scrolled.add(self.dep_treeview)
+        box.add(scrolled)
+        pane.add2(box)
+
+        # Reverse Depends
+        scrolled = gtk.ScrolledWindow()
+        scrolled.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
+        scrolled.set_shadow_type(gtk.SHADOW_IN)
+        self.revdep_treeview = PackageReverseDepView(self.depends_model, "Reverse Depends")
+        self.revdep_treeview.connect("row-activated", self.on_package_activated, COL_DEP_PARENT)
+        scrolled.add(self.revdep_treeview)
+        box.add(scrolled)
+        pane.add2(box)
+
+        self.show_all()
+
+    def on_package_activated(self, treeview, path, column, data_col):
+        model = treeview.get_model()
+        package = model.get_value(model.get_iter(path), data_col)
+
+        pkg_path = []
+        def finder(model, path, iter, needle):
+            package = model.get_value(iter, COL_PKG_NAME)
+            if package == needle:
+                pkg_path.append(path)
+                return True
+            else:
+                return False
+        self.pkg_model.foreach(finder, package)
+        if pkg_path:
+            self.pkg_treeview.get_selection().select_path(pkg_path[0])
+            self.pkg_treeview.scroll_to_cell(pkg_path[0])
+
+    def on_cursor_changed(self, selection):
+        (model, it) = selection.get_selected()
+        if it is None:
+            current_package = None
+        else:
+            current_package = model.get_value(it, COL_PKG_NAME)
+        self.rdep_treeview.set_current_package(current_package)
+        self.dep_treeview.set_current_package(current_package)
+        self.revdep_treeview.set_current_package(current_package)
+
+
+    def parse(self, depgraph):
+        for package in depgraph["pn"]:
+            self.pkg_model.insert(0, (package,))
+
+        for package in depgraph["depends"]:
+            for depend in depgraph["depends"][package]:
+                self.depends_model.insert (0, (TYPE_DEP, package, depend))
+
+        for package in depgraph["rdepends-pn"]:
+            for rdepend in depgraph["rdepends-pn"][package]:
+                self.depends_model.insert (0, (TYPE_RDEP, package, rdepend))
+
+
+class gtkthread(threading.Thread):
+    quit = threading.Event()
+    def __init__(self, shutdown):
+        threading.Thread.__init__(self)
+        self.setDaemon(True)
+        self.shutdown = shutdown
+
+    def run(self):
+        gobject.threads_init()
+        gtk.gdk.threads_init()
+        gtk.main()
+        gtkthread.quit.set()
+
+
+def main(server, eventHandler, params):
+    try:
+        params.updateFromServer(server)
+        cmdline = params.parseActions()
+        if not cmdline:
+            print("Nothing to do.  Use 'bitbake world' to build everything, or run 'bitbake --help' for usage information.")
+            return 1
+        if 'msg' in cmdline and cmdline['msg']:
+            print(cmdline['msg'])
+            return 1
+        cmdline = cmdline['action']
+        if not cmdline or cmdline[0] != "generateDotGraph":
+            print("This UI requires the -g option")
+            return 1
+        ret, error = server.runCommand(["generateDepTreeEvent", cmdline[1], cmdline[2]])
+        if error:
+            print("Error running command '%s': %s" % (cmdline, error))
+            return 1
+        elif ret != True:
+            print("Error running command '%s': returned %s" % (cmdline, ret))
+            return 1
+    except xmlrpclib.Fault as x:
+        print("XMLRPC Fault getting commandline:\n %s" % x)
+        return
+
+    try:
+        gtk.init_check()
+    except RuntimeError:
+        sys.stderr.write("Please set DISPLAY variable before running this command \n")
+        return
+
+    shutdown = 0
+
+    gtkgui = gtkthread(shutdown)
+    gtkgui.start()
+
+    gtk.gdk.threads_enter()
+    dep = DepExplorer()
+    bardialog = gtk.Dialog(parent=dep,
+                           flags=gtk.DIALOG_MODAL|gtk.DIALOG_DESTROY_WITH_PARENT)
+    bardialog.set_default_size(400, 50)
+    pbar = HobProgressBar()
+    bardialog.vbox.pack_start(pbar)
+    bardialog.show_all()
+    bardialog.connect("delete-event", gtk.main_quit)
+    gtk.gdk.threads_leave()
+
+    progress_total = 0
+    while True:
+        try:
+            event = eventHandler.waitEvent(0.25)
+            if gtkthread.quit.isSet():
+                _, error = server.runCommand(["stateForceShutdown"])
+                if error:
+                    print('Unable to cleanly stop: %s' % error)
+                break
+
+            if event is None:
+                continue
+
+            if isinstance(event, bb.event.CacheLoadStarted):
+                progress_total = event.total
+                gtk.gdk.threads_enter()
+                bardialog.set_title("Loading Cache")
+                pbar.update(0)
+                gtk.gdk.threads_leave()
+
+            if isinstance(event, bb.event.CacheLoadProgress):
+                x = event.current
+                gtk.gdk.threads_enter()
+                pbar.update(x * 1.0 / progress_total)
+                pbar.set_title('')
+                gtk.gdk.threads_leave()
+                continue
+
+            if isinstance(event, bb.event.CacheLoadCompleted):
+                bardialog.hide()
+                continue
+
+            if isinstance(event, bb.event.ParseStarted):
+                progress_total = event.total
+                if progress_total == 0:
+                    continue
+                gtk.gdk.threads_enter()
+                pbar.update(0)
+                bardialog.set_title("Processing recipes")
+
+                gtk.gdk.threads_leave()
+
+            if isinstance(event, bb.event.ParseProgress):
+                x = event.current
+                gtk.gdk.threads_enter()
+                pbar.update(x * 1.0 / progress_total)
+                pbar.set_title('')
+                gtk.gdk.threads_leave()
+                continue
+
+            if isinstance(event, bb.event.ParseCompleted):
+                bardialog.hide()
+                continue
+
+            if isinstance(event, bb.event.DepTreeGenerated):
+                gtk.gdk.threads_enter()
+                dep.parse(event._depgraph)
+                gtk.gdk.threads_leave()
+
+            if isinstance(event, bb.command.CommandCompleted):
+                continue
+
+            if isinstance(event, bb.command.CommandFailed):
+                print("Command execution failed: %s" % event.error)
+                return event.exitcode
+
+            if isinstance(event, bb.command.CommandExit):
+                return event.exitcode
+
+            if isinstance(event, bb.cooker.CookerExit):
+                break
+
+            continue
+        except EnvironmentError as ioerror:
+            # ignore interrupted io
+            if ioerror.args[0] == 4:
+                pass
+        except KeyboardInterrupt:
+            if shutdown == 2:
+                print("\nThird Keyboard Interrupt, exit.\n")
+                break
+            if shutdown == 1:
+                print("\nSecond Keyboard Interrupt, stopping...\n")
+                _, error = server.runCommand(["stateForceShutdown"])
+                if error:
+                    print('Unable to cleanly stop: %s' % error)
+            if shutdown == 0:
+                print("\nKeyboard Interrupt, closing down...\n")
+                _, error = server.runCommand(["stateShutdown"])
+                if error:
+                    print('Unable to cleanly shutdown: %s' % error)
+            shutdown = shutdown + 1
+            pass