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CGAL::Qt::GraphicsViewPolylineInput<K>

Definition

An object of type Qt::GraphicsViewPolylineInput<K> creates a list of points. A new vertex is inserted every time the left mouse button is pressed. The list of points is emitted on a right click or when the number of points specified in the constructor is reached. You can use the 'Del' or 'Backspace' key if you want to remove your last entered point in the polygon, and the 'Esc' key if you want to remove all points.

The tool can serve at the same time for entering a single point, a polyline with a given number of points, and for open as well as closed polylines.

For polylines the segment between the last entered point and the current mouse position is only drawn correctly when mouse tracking is enabled in the graphics view. The same holds for closed polygons.

#include <CGAL/Qt/GraphicsViewPolylineInput.h>

Parameters

The template parameter of GraphicsViewPolylineInput<K> must be a Cgal Kernel.

Inherits From

Qt::GraphicsViewInput

Creation

Qt::GraphicsViewPolylineInput<K> in ( QObject *p, QGraphicsScene* s, int n = 0, bool closed = true);
p is a parent object. s is the scene where the polyline is generated. n is the number of points of the polyline to be generated. If c is equal to 0, the default value, the number of points of the polyline is not limited. When closed is true the function displays a polygon.

Signals

void in.generate ( CGAL::Object o) The object o contains a std:list<K::Point_2>.

Next: Qt::GraphicsViewIsoRectangleInput<K>
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CGAL Open Source Project. Release 3.9. 26 September 2011.