IlvOneSplineLinkImage Class Reference

Implementation of links drawn with a spline defined by 2 orthogonal segments. More...

#include <ilviews/grapher/links.h>

Inheritance diagram for IlvOneSplineLinkImage:

List of all members.

Public Member Functions
	IlvOneSplineLinkImage (IlvDisplay *display, IlvLinkOrientation orientation, IlBoolean oriented, IlvGraphic *from, IlvGraphic *to, IlvPalette *palette=0)
	Constructor.
virtual IlvPoint *	getLinkPoints (IlUInt &nPoints, const IlvTransformer *t=0) const
	Returns the points defining the shape of the link.
void	setControlPoint (const IlvPoint &p, const IlvTransformer *t=0)
	Sets the coordinates of the double control point.

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Detailed Description

Implementation of links drawn with a spline defined by 2 orthogonal segments.

Library: ilvgrapher

A link of the IlvOneSplineLinkImage class is drawn as a spline, as shown in the figure below. It inherits its orientation from the IlvOneLinkImage class.
The start and end points both depend on the relative positions of the start and end nodes. The two control points of the drawn spline are both at the crossing coordinate of the start and end tangents of the link. You are given the opportunity to modify the position of the double control point with the setControlPoint member function.

- IlvOneSplineLinkImage -

See also:

IlvMakeOneSplineLinkImageInteractor.

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Constructor & Destructor Documentation

IlvOneSplineLinkImage::IlvOneSplineLinkImage	(	IlvDisplay *	display,
		IlvLinkOrientation	orientation,
		IlBoolean	oriented,
		IlvGraphic *	from,
		IlvGraphic *	to,
		IlvPalette *	palette = 0
	)

Constructor.

Initializes a new instance of the IlvOneSplineLinkImage class. The orientation parameter specifies the direction (horizontal or vertical) the link takes upon leaving the from node.

Parameters:

	display	The display connection that handles the drawing of this object.
	orientation	The orientation for the link.
	oriented	A Boolean indicating whether an arrowhead is to be drawn at the end of the link.
	from	The IlvGraphic object representing the start node of the link.
	to	The IlvGraphic object representing the end node of the link.
	palette	The palette used to draw the link.

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Member Function Documentation

virtual IlvPoint* IlvOneSplineLinkImage::getLinkPoints	(	IlUInt &	nPoints,
		const IlvTransformer *	t = 0
	)			const [virtual]

Returns the points defining the shape of the link.

Returns an array of points defining the shape of the link when it is drawn with the transformer t. The size of the resulting array of points is returned in the nPoints parameter. The array is stored in an IlPoolOf(IlvPoint) and should not be deleted or modified.
This method is internally used by the methods draw, contains, and boundingBox. It is meant to replace various methods defined in subclasses in previous releases of Rogue Wave Views; like the obsolete IlvOneLinkImage::getPoints.
This function is overloaded by subclasses defining a specific shape for links. The default implementation returns an array of two points computed with the IlvLinkImage::computePoints method.

Parameters:

	nPoints	The number of points in the returned array.
	t	The transformer applied to the link.

Returns:

The points defining the shape of the link.

Reimplemented from IlvOneLinkImage.

void IlvOneSplineLinkImage::setControlPoint	(	const IlvPoint &	p,
		const IlvTransformer *	t = 0
	)

Sets the coordinates of the double control point.

Parameters:

	p	The new position for the double control point.
	t	The transformer applied to the link.