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/*******************************************************************************
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* Copyright (c) 2000, 2010 IBM Corporation and others.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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* Research Group Software Construction,
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* RWTH Aachen University, Germany - Contribution for Bugzilla 195527
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*******************************************************************************/
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package org.eclipse.draw2d;
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import org.eclipse.draw2d.rap.swt.SWT;
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/**
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* Layer designed specifically to handle the presence of connections. This is
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* done due to the necessity of having a router for the connections added.
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*/
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public class ConnectionLayer extends FreeformLayer {
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int antialias = SWT.DEFAULT;
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/**
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* The ConnectionRouter used to route all connections on this layer.
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*/
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protected ConnectionRouter connectionRouter;
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/**
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* Adds the given figure with the given contraint at the given index. If the
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* figure is a {@link Connection}, its {@link ConnectionRouter} is set.
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*
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* @param figure
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* Figure being added
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* @param constraint
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* Constraint of the figure being added
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* @param index
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* Index where the figure is to be added
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* @since 2.0
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*/
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public void add(IFigure figure, Object constraint, int index) {
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super.add(figure, constraint, index);
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// If the connection layout manager is set, then every
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// figure added should use this layout manager.
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if (figure instanceof Connection && getConnectionRouter() != null)
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((Connection) figure).setConnectionRouter(getConnectionRouter());
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}
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/**
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* Returns the ConnectionRouter being used by this layer.
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*
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* @return ConnectionRouter being used by this layer
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* @since 2.0
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*/
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public ConnectionRouter getConnectionRouter() {
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return connectionRouter;
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}
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/**
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* @see IFigure#paint(Graphics)
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*/
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public void paint(Graphics graphics) {
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if (antialias != SWT.DEFAULT)
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graphics.setAntialias(antialias);
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super.paint(graphics);
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}
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/**
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* Removes the figure from this Layer. If the figure is a {@link Connection}
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* , that Connection's {@link ConnectionRouter} is set to <code>null</code>.
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*
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* @param figure
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* The figure to remove
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*/
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public void remove(IFigure figure) {
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if (figure instanceof Connection)
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((Connection) figure).setConnectionRouter(null);
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super.remove(figure);
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}
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/**
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* Sets the ConnectionRouter for this layer. This router is set as the
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* ConnectionRouter for all the child connections of this Layer.
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*
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* @param router
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* The ConnectionRouter to set for this Layer
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* @since 2.0
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*/
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public void setConnectionRouter(ConnectionRouter router) {
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connectionRouter = router;
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FigureIterator iter = new FigureIterator(this);
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IFigure figure;
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while (iter.hasNext()) {
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figure = iter.nextFigure();
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if (figure instanceof Connection)
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((Connection) figure).setConnectionRouter(router);
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}
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}
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/**
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* Sets whether antialiasing should be enabled for the connection layer. If
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* this value is set to something other than {@link SWT#DEFAULT},
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* {@link Graphics#setAntialias(int)} will be called with the given value
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* when painting this layer.
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*
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* @param antialias
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* the antialias setting
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* @since 3.1
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*/
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public void setAntialias(int antialias) {
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this.antialias = antialias;
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}
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}
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