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* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
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* The Original Software is NetBeans. The Initial Developer of the Original
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package org.netbeans.api.visual.anchor;
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import org.netbeans.modules.visual.anchor.TriangleAnchorShape;
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* Represents an anchor shape which is rendered at the source and the target point of a connection widget where the shape is used.
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* The same instance of a shape could be shared by multiple connection widgets.
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* @author David Kaspar
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public interface AnchorShape {
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* Returns whether the shape is oriented by the line path of a connection.
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* @return true if it is line-oriented
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public boolean isLineOriented ();
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* Returns a radius of a shape that the shape used for rendering.
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public int getRadius ();
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* Returns a distance by which a line at particular source or target point should be cut (not rendered).
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* This is used for hollow-triangle shapes, to not paint the connection-line within the triangle.
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* @return the cut distance in pixels;
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* if positive, then the line is cut by specified number of pixels, the line could be cut by radius pixels only;
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* if 0.0, then the line is not cut;
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* if negative, then the line is extended by specified number of pixels, the line could be extended by radius pixels only
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public double getCutDistance ();
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* Renders the shape into a graphics instance
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* @param graphics the graphics
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* @param source true, if the shape is used for a source point; false if the shape is used for a target point.
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public void paint (Graphics2D graphics, boolean source);
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* The empty anchor shape.
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public static final AnchorShape NONE = new AnchorShape() {
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public boolean isLineOriented () { return false; }
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public int getRadius () { return 0; }
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public double getCutDistance () { return 0; }
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public void paint (Graphics2D graphics, boolean source) { }
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* The hollow-triangle anchor shape.
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public static final AnchorShape TRIANGLE_HOLLOW = new TriangleAnchorShape (12, false, false, true, 12.0);
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* The filled-triangle anchor shape.
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public static final AnchorShape TRIANGLE_FILLED = new TriangleAnchorShape (12, true, false, false, 11.0);
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* The output-triangle anchor shape.
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public static final AnchorShape TRIANGLE_OUT = new TriangleAnchorShape (12, true, true, false, 11.0);