10% work

complete most xml relax ng work.
work on real interface xml
work on python scripts for parsing interface xml

python/mine/ri_cmd.py

@@ -0,0 +1,28 @@
+#!/usr/bin/python
+''' handle gui button related commands.'''
+
+import ri_tk
+import ri_seq
+import ri_widget
+
+def quit():
+    ''' correspond to quit button '''
+    ri_tk.quit()
+
+def previous():
+    ''' correspond to previous button '''
+    if 'current_window' in dir(ri_tk):
+        ri_tk.kill_widget(ri_tk.current_window)
+
+    wid_name = ri_seq.previous()
+    if wid_name is not None:
+        ri_tk.display_widget(ri_widget.Widget.dict[wid_name])
+
+def next():
+    ''' correspond to next button '''
+    if 'current_window' in dir(ri_tk):
+        ri_tk.kill_widget(ri_tk.current_window)
+
+    wid_name = ri_seq.next()
+    if wid_name is not None:
+        ri_tk.display_widget(ri_widget.Widget.dict[wid_name])