QwtClipper Namespace Reference

Namespace for clipping algorithms. More...

Functions
QWTCORE_EXPORT void	clipPolygon (const QRect &, QPolygon &, bool closePolygon=false)
	Sutherland-Hodgman polygon clipping algorithm (integer coordinates)
QWTCORE_EXPORT void	clipPolygon (const QRectF &, QPolygon &, bool closePolygon=false)
	Sutherland-Hodgman polygon clipping algorithm.
QWTCORE_EXPORT void	clipPolygonF (const QRectF &, QPolygonF &, bool closePolygon=false)
	Sutherland-Hodgman polygon clipping algorithm (float coordinates)
QWTCORE_EXPORT QPolygon	clippedPolygon (const QRect &, const QPolygon &, bool closePolygon=false)
	Return clipped polygon (integer rectangle)
QWTCORE_EXPORT QPolygon	clippedPolygon (const QRectF &, const QPolygon &, bool closePolygon=false)
	Return clipped polygon (float rectangle)
QWTCORE_EXPORT QPolygonF	clippedPolygonF (const QRectF &, const QPolygonF &, bool closePolygon=false)
	Return clipped float polygon.
QWTCORE_EXPORT QVector< QwtInterval >	clipCircle (const QRectF &, const QPointF &, double radius)
	Clip circle and return arcs as intervals.

Detailed Description

Namespace for clipping algorithms.

Function Documentation

clipCircle()

QVector< QwtInterval > QwtClipper::clipCircle	(	const QRectF &	clipRect,
		const QPointF &	center,
		double	radius
	)

Clip circle and return arcs as intervals.

clipCircle() divides a circle into intervals of angles representing arcs of the circle. When the circle is completely inside the clip rectangle, an interval [0.0, 2π] is returned.

Parameters

clipRect	Clip rectangle
center	Center of the circle
radius	Radius of the circle

Returns

Arcs of the circle as angle intervals

clippedPolygon() [1/2]

QPolygon QwtClipper::clippedPolygon	(	const QRect &	clipRect,
		const QPolygon &	polygon,
		bool	closePolygon = false
	)

Return clipped polygon (integer rectangle)

Parameters

clipRect	Clip rectangle
polygon	Polygon to clip
closePolygon	True if the polygon is closed

Returns

Clipped polygon

clippedPolygon() [2/2]

QPolygon QwtClipper::clippedPolygon	(	const QRectF &	clipRect,
		const QPolygon &	polygon,
		bool	closePolygon = false
	)

Return clipped polygon (float rectangle)

Parameters

clipRect	Clip rectangle
polygon	Polygon to clip
closePolygon	True if the polygon is closed

Returns

Clipped polygon

clippedPolygonF()

QPolygonF QwtClipper::clippedPolygonF	(	const QRectF &	clipRect,
		const QPolygonF &	polygon,
		bool	closePolygon = false
	)

Return clipped float polygon.

Parameters

clipRect	Clip rectangle
polygon	Polygon to clip
closePolygon	True if the polygon is closed

Returns

Clipped polygon

clipPolygon() [1/2]

void QwtClipper::clipPolygon	(	const QRect &	clipRect,
		QPolygon &	polygon,
		bool	closePolygon = false
	)

Sutherland-Hodgman polygon clipping algorithm (integer coordinates)

Parameters

clipRect	Clip rectangle
polygon	Polygon to be clipped (modified in place)
closePolygon	True if the polygon is closed

clipPolygon() [2/2]

void QwtClipper::clipPolygon	(	const QRectF &	clipRect,
		QPolygon &	polygon,
		bool	closePolygon = false
	)

Sutherland-Hodgman polygon clipping algorithm.

Parameters

clipRect	Clip rectangle
polygon	Polygon to be clipped (modified in place)
closePolygon	True if the polygon is closed

clipPolygonF()

void QwtClipper::clipPolygonF	(	const QRectF &	clipRect,
		QPolygonF &	polygon,
		bool	closePolygon = false
	)

Sutherland-Hodgman polygon clipping algorithm (float coordinates)

Parameters

clipRect	Clip rectangle
polygon	Polygon to be clipped (modified in place)
closePolygon	True if the polygon is closed