Merge branch 'master' of https://github.com/haxeui/haxeui-core

Author: ianharrigan

haxe/ui/containers/ButtonBar.hx

@@ -59,7 +59,9 @@ private class SelectedIndex extends DataBehaviour {
             builder._currentButton = button;
         }
 
-        _component.dispatch(new UIEvent(UIEvent.CHANGE));
+	var event = new UIEvent(UIEvent.CHANGE);
+        event.previousValue = _previousValue;
+        _component.dispatch(event);
     }
 }
 
@@ -214,4 +216,4 @@ class ButtonBarBuilder extends CompositeBuilder {
     private function showWarning() {
         trace("WARNING: trying to create an instance of 'ButtonBar' directly, use either 'HorizontalButtonBar' or 'VerticalButtonBar'");
     }
-}
+}