add scrollSize

direct/src/gui/DirectScrollBar.py

@@ -22,6 +22,7 @@ class DirectScrollBar(DirectFrame):
 
             ('range',          (0, 1),             self.setRange),
             ('value',          0,                  self.__setValue),
+            ('scrollSize',     0.01,               self.setScrollSize),
             ('pageSize',       0.1,                self.setPageSize),
             ('orientation',    HORIZONTAL,         self.setOrientation),
             ('manageButtons',  1,                  self.setManageButtons),
@@ -96,6 +97,9 @@ class DirectScrollBar(DirectFrame):
     def getRatio(self):
         return self.guiItem.getRatio()
 
+    def setScrollSize(self):
+        self.guiItem.setScrollSize(self['scrollSize'])
+
     def setPageSize(self):
         self.guiItem.setPageSize(self['pageSize'])