# Chapter 17
Qt_widget

Laurent Rineau and Radu Ursu

## Summary

Qt_widget is the base widget class that CGAL provide as support for 2D CGAL users.

### Classes

CGAL::Qt_widget
CGAL::Qt_widget_layer
CGAL::Qt_widget_standard_toolbar
CGAL::Qt_widget_history
CGAL::Qt_help_window
CGAL::Qt_widget_get_point<T>
CGAL::Qt_widget_get_segment<T>
CGAL::Qt_widget_get_line<T>
CGAL::Qt_widget_get_circle<T>
CGAL::Qt_widget_get_iso_rectangle<T>
CGAL::Qt_widget_get_polygon<Polygon>
CGAL::Qt_widget_get_simple_polygon<Polygon>

## Reference Pages

- Qt_widget

- Qt_widget_layer

- Qt_widget_get_point<T>

- Qt_widget_get_segment<T>

- Qt_widget_get_line<T>

- Qt_widget_get_circle<T>

- Qt_widget_get_iso_rectangle<T>

- Qt_widget_get_polygon<Polygon>

- Qt_widget_get_simple_polygon<Polygon>

- Naviagtion_layer

- Custom_zoom_layer

- Qt_widget_standard_toolbar

- Qt_widget_history

- Qt_help_window