diff --git a/viewr/__init__.py b/viewr/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/viewr/__main__.py b/viewr/__main__.py
new file mode 100644
index 0000000..e69de29
diff --git a/viewr/xdsample.py b/viewr/xdsample.py
new file mode 100644
index 0000000..a1120a9
--- /dev/null
+++ b/viewr/xdsample.py
@@ -0,0 +1,132 @@
+#!/usr/bin/env python3
+#
+# Copyright 2008 Jose Fonseca
+#
+# This program is free software: you can redistribute it and/or modify it
+# under the terms of the GNU Lesser General Public License as published
+# by the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+
+import operator
+import re
+import sys
+
+import gi
+
+gi.require_version("Gtk", "3.0")
+
+import xdot.ui
+from gi.repository import Gio, Gtk
+
+
+def __icon_button__(icon_name: str) -> Gtk.Button:
+    icon = Gio.ThemedIcon(name=icon_name)
+    image = Gtk.Image.new_from_gicon(icon, Gtk.IconSize.BUTTON)
+    button = Gtk.Button()
+    button.add(image)
+    return button
+
+
+class MyDotWindow(Gtk.Window):
+    def __init__(self):
+        super().__init__(title="Test")
+        self.set_border_width(10)
+        self.set_default_size(400, 200)
+        self.dot = xdot.ui.DotWidget()
+
+        hb = Gtk.HeaderBar()
+        hb.set_show_close_button(True)
+        self.set_titlebar(hb)
+
+        box = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL)
+        Gtk.StyleContext.add_class(box.get_style_context(), "linked")
+        button = __icon_button__("zoom-in")
+        button.connect("clicked", self.dot.on_zoom_in)
+        box.add(button)
+        button = __icon_button__("zoom-out")
+        button.connect("clicked", self.dot.on_zoom_out)
+        box.add(button)
+        box.add(Gtk.SeparatorToolItem())
+        button = __icon_button__("zoom-fit-best")
+        button.connect("clicked", self.dot.on_zoom_fit)
+        box.add(button)
+        button = __icon_button__("zoom-original")
+        button.connect("clicked", self.dot.on_zoom_100)
+        box.add(button)
+
+        hb.pack_start(box)
+
+        box = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL)
+        Gtk.StyleContext.add_class(box.get_style_context(), "linked")
+        self.search_entry = Gtk.Entry()
+        self.search_entry.connect("activate", self.search)
+        self.search_entry.connect("changed", self.search)
+        self.search_entry.set_placeholder_text("Search...")
+
+        box.add(self.search_entry)
+        button = __icon_button__("find")
+        button.connect("clicked", self.search)
+        box.add(button)
+
+        hb.pack_end(box)
+
+        self.add(self.dot)
+
+        self.set_focus(self.dot)
+
+    def set_dotcode(self, code):
+        self.dot.set_dotcode(code)
+
+    def find_text(self, entry_text):
+        found_items = []
+        dot_widget = self.dot
+        try:
+            regexp = re.compile(entry_text)
+        except re.error as err:
+            sys.stderr.write('warning: re.compile() failed with error "%s"\n' % err)
+            return []
+        for element in (
+            dot_widget.graph.nodes + dot_widget.graph.edges + dot_widget.graph.shapes
+        ):
+            if element.search_text(regexp):
+                found_items.append(element)
+        return sorted(found_items, key=operator.methodcaller("get_text"))
+
+    def search(self, _):
+        txt = self.search_entry.get_text()
+        if txt:
+            items = self.find_text(txt)
+            self.dot.set_highlight(items, search=True)
+        else:
+            self.dot.set_highlight(None, search=True)
+
+
+dotcode = b"""
+digraph G {
+  Hello [URL="http://en.wikipedia.org/wiki/Hello"]
+  World [URL="http://en.wikipedia.org/wiki/World"]
+    Hello -> World
+}
+"""
+
+
+def main():
+    window = MyDotWindow()
+    window.set_dotcode(dotcode)
+    window.connect("delete-event", Gtk.main_quit)
+    window.show_all()
+    Gtk.main()
+
+
+if __name__ == "__main__":
+    main()