MainWindow 0 0 400 300 GUIProjekt SS2015_SS 0 0 400 29 Fi&le Edi&t Hel&p false &Exit &Preferences &About &Language Draw L&ine Draw &Rectangle Draw &Ellipse Draw P&olygon InteractionCanvas QLabel

interactioncanvas.h

actionExit triggered() MainWindow close() -1 -1 199 149 on_action_Preferences_triggered()