diff -u examples.old/coolwave.py examples/coolwave.py
--- examples.old/coolwave.py	2004-01-18 11:35:37.000000000 +0100
+++ examples/coolwave.py	2004-01-18 11:54:32.000000000 +0100
@@ -246,10 +246,10 @@
         pass
 
     def button_motion (self, width, height, event):
-        if event.state == gtk.gdk.BUTTON1_MASK:
+        if event.state & gtk.gdk.BUTTON1_MASK:
             self.__sphi += (event.x - self.__beginX)/4.0
             self.__stheta += (self.__beginY - event.y)/4.0
-        elif event.state == gtk.gdk.BUTTON2_MASK:
+        elif event.state & gtk.gdk.BUTTON2_MASK:
             self.__sdepth += (self.__beginY - event.y)/10.0
         self.__beginX = event.x
         self.__beginY = event.y
diff -u examples.old/Shapes.py examples/Shapes.py
--- examples.old/Shapes.py	2004-01-18 11:35:37.000000000 +0100
+++ examples/Shapes.py	2004-01-18 11:54:32.000000000 +0100
@@ -209,10 +209,10 @@
         pass
     
     def button_motion(self, width, height, event):
-        if event.state == gtk.gdk.BUTTON1_MASK:
+        if event.state & gtk.gdk.BUTTON1_MASK:
             self.rotx = self.rotx + ((event.y-self.beginy)/width)*360.0
             self.roty = self.roty + ((event.x-self.beginx)/height)*360.0
-        elif event.state == gtk.gdk.BUTTON2_MASK:
+        elif event.state & gtk.gdk.BUTTON2_MASK:
             self.depth = self.depth - ((event.y-self.beginy)/(height))*50.0;
         
         if self.depth > 130.0: self.depth = 130.0;
diff -u examples.old/teapot2.py examples/teapot2.py
--- examples.old/teapot2.py	2004-01-18 11:35:37.000000000 +0100
+++ examples/teapot2.py	2004-01-18 11:54:32.000000000 +0100
@@ -79,7 +79,7 @@
         pass
     
     def button_motion(self, width, height, event):
-        if event.state == gtk.gdk.BUTTON1_MASK:
+        if event.state & gtk.gdk.BUTTON1_MASK:
             self.rotx = self.rotx + ((event.y-self.beginy)/width)*360.0
             self.roty = self.roty + ((event.x-self.beginx)/height)*360.0