+ QtCore.QObject.connect(self.action_EditCategory, QtCore.SIGNAL("triggered()"), MainWindow.onCategoryEdit)
+ QtCore.QObject.connect(self.action_RemoveCategory, QtCore.SIGNAL("triggered()"), MainWindow.onCategoryDelete)
+ QtCore.QObject.connect(self.categories, QtCore.SIGNAL("itemSelectionChanged()"), MainWindow.onCategorySelectionChanged)
+ QtCore.QObject.connect(self.action_Refresh, QtCore.SIGNAL("triggered()"), MainWindow.onViewRefresh)