fix regression when converted to qwidget

loopvisiblelayers.py

@@ -58,6 +58,7 @@ def initGui(self):
         self.dockWidget.setObjectName('Loop Visible Layers')
         self.dockWidget.setWidget(self.loopWidget)       
         QObject.connect(self.dockWidget, SIGNAL('topLevelChanged ( bool )'), self.resizeDock)
+        QObject.connect(self.dockWidget, SIGNAL('visibilityChanged ( bool )'), self.loopWidget.onVisibilityChanged)
         self.iface.addDockWidget(Qt.LeftDockWidgetArea, self.dockWidget)
 
     def showHideDock(self):

loopvisiblelayerswidget.py

@@ -78,7 +78,6 @@ def __init__(self, iface):
         QObject.connect(self.btnForward, SIGNAL('clicked()'), self.actionForward)
         QObject.connect(self.btnBack, SIGNAL('clicked()'), self.actionBack)
         QObject.connect(self.btnStop, SIGNAL('clicked()'), self.actionStop)
-        QObject.connect(self, SIGNAL('visibilityChanged ( bool )'), self.onVisibilityChanged)
 
         # signals mapped to checkGroupsChanged (btnRefresh, layers changed)
         #QObject.connect( self.btnRefresh, SIGNAL( 'clicked()' ), self.checkGroupsChanged )
@@ -154,7 +153,7 @@ def actionStart(self):
             self.checkGroupsChanged()
             QtGui.QMessageBox.warning(self, 'Warning', 'Loop Visible Layers Plugin \n\nSelection has been updated, verify and start again')
             return
- 
+
         # save visible layers
         self.bakLayerIds = list()
         for layer in self.iface.mapCanvas().layers():

ui_loopvisiblelayerswidget.py

@@ -2,7 +2,7 @@
 
 # Form implementation generated from reading ui file 'ui_loopvisiblelayerswidget.ui'
 #
-# Created: Fri Mar 16 18:58:04 2012
+# Created: Fri Mar 16 20:25:42 2012
 #      by: PyQt4 UI code generator 4.8.5
 #
 # WARNING! All changes made in this file will be lost!