- * CAUTION: this node must be used with extreme care! It can be
- * used to generate cyclic scene graphs which may cause rendering to crash due
- * to infinite recursion and in any case rendering will not work as intended.
- * E.g. a scene graph could have a {@link NavigationNode} under its root node
- * and under which a LinkNode could link back to the navigation
- * node, which would cause everything to be rendered twice and with double
- * transformations. As a safety measure against cyclic cases, this node contains
- * state that prevents it from being invoked recursively.
- *
- *
- * CAVEAT 1: Nodes with internal state that is updated during rendering. - * Such nodes should not be used with this. - * - *
- * CAVEAT 2: Only intended for local rendering. Will not work with remote - * rendering. For remote support, use {@link ILookupService} and - * {@link LinkNode} instead. - * - * @author Tuukka Lehtonen - * - * @see LinkNode - * @see ILookupService - */ -public class LocalDelegateNode extends StateMaskNode { - - private static final long serialVersionUID = -7465071303188585400L; - - /** - * The delegate node. - */ - IG2DNode delegate; - - /** - * @param delegate - */ - public void setDelegate(IG2DNode delegate) { - this.delegate = delegate; - } - - public IG2DNode getDelegate() { - return delegate; - } - - @Override - public void render(Graphics2D g2d) { - // Safety against cyclic cases. - if (hasFlags(IN_RENDER)) - return; - - if (delegate == null) - return; - - setFlags(IN_RENDER); - AffineTransform oldTransform = null; - if (transform != null && !transform.isIdentity()) { - g2d.transform(transform); - oldTransform = g2d.getTransform(); - } - try { - delegate.render(g2d); - } finally { - if (oldTransform != null) - g2d.setTransform(oldTransform); - clearFlags(IN_RENDER); - } - } - - @Override - public Rectangle2D getBoundsInLocal() { - // Safety against cyclic cases. - if (hasFlags(IN_GET_BOUNDS)) - return new Rectangle2D.Double(); - - if (delegate == null) - return new Rectangle2D.Double(); - - setFlags(IN_GET_BOUNDS); - try { - Rectangle2D bounds = delegate.getBoundsInLocal(); - if (transform != null && !transform.isIdentity()) - bounds = transform.createTransformedShape(bounds).getBounds2D(); - return bounds; - } finally { - clearFlags(IN_GET_BOUNDS); - } - } - +/******************************************************************************* + * Copyright (c) 2007, 2010 Association for Decentralized Information Management + * in Industry THTH ry. + * All rights reserved. This program and the accompanying materials + * are made available under the terms of the Eclipse Public License v1.0 + * which accompanies this distribution, and is available at + * http://www.eclipse.org/legal/epl-v10.html + * + * Contributors: + * VTT Technical Research Centre of Finland - initial API and implementation + *******************************************************************************/ +package org.simantics.scenegraph.g2d.nodes; + +import java.awt.Graphics2D; +import java.awt.geom.AffineTransform; +import java.awt.geom.Rectangle2D; + +import org.simantics.scenegraph.ILookupService; +import org.simantics.scenegraph.g2d.IG2DNode; + +/** + * A node that delegates {@link #render(Graphics2D)} and + * {@link #getBoundsInLocal()} methods to a delegate {@link IG2DNode} it + * contains. + * + *
+ * CAUTION: this node must be used with extreme care! It can be
+ * used to generate cyclic scene graphs which may cause rendering to crash due
+ * to infinite recursion and in any case rendering will not work as intended.
+ * E.g. a scene graph could have a {@link NavigationNode} under its root node
+ * and under which a LinkNode could link back to the navigation
+ * node, which would cause everything to be rendered twice and with double
+ * transformations. As a safety measure against cyclic cases, this node contains
+ * state that prevents it from being invoked recursively.
+ *
+ *
+ * CAVEAT 1: Nodes with internal state that is updated during rendering. + * Such nodes should not be used with this. + * + *
+ * CAVEAT 2: Only intended for local rendering. Will not work with remote + * rendering. For remote support, use {@link ILookupService} and + * {@link LinkNode} instead. + * + * @author Tuukka Lehtonen + * + * @see LinkNode + * @see ILookupService + */ +public class LocalDelegateNode extends StateMaskNode { + + private static final long serialVersionUID = -7465071303188585400L; + + /** + * The delegate node. + */ + IG2DNode delegate; + + /** + * @param delegate + */ + public void setDelegate(IG2DNode delegate) { + this.delegate = delegate; + } + + public IG2DNode getDelegate() { + return delegate; + } + + @Override + public void render(Graphics2D g2d) { + // Safety against cyclic cases. + if (hasFlags(IN_RENDER)) + return; + + if (delegate == null) + return; + + setFlags(IN_RENDER); + AffineTransform oldTransform = null; + if (transform != null && !transform.isIdentity()) { + g2d.transform(transform); + oldTransform = g2d.getTransform(); + } + try { + delegate.render(g2d); + } finally { + if (oldTransform != null) + g2d.setTransform(oldTransform); + clearFlags(IN_RENDER); + } + } + + @Override + public Rectangle2D getBoundsInLocal() { + // Safety against cyclic cases. + if (hasFlags(IN_GET_BOUNDS)) + return new Rectangle2D.Double(); + + if (delegate == null) + return new Rectangle2D.Double(); + + setFlags(IN_GET_BOUNDS); + try { + Rectangle2D bounds = delegate.getBoundsInLocal(); + if (transform != null && !transform.isIdentity()) + bounds = transform.createTransformedShape(bounds).getBounds2D(); + return bounds; + } finally { + clearFlags(IN_GET_BOUNDS); + } + } + } \ No newline at end of file