1 /*******************************************************************************
2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v1.0
6 * which accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.scenegraph.g2d.nodes;
14 import java.awt.AlphaComposite;
15 import java.awt.Composite;
16 import java.awt.Graphics2D;
17 import java.awt.geom.Point2D;
18 import java.awt.geom.Rectangle2D;
20 import org.simantics.scenegraph.ParentNode;
21 import org.simantics.scenegraph.g2d.G2DHints;
22 import org.simantics.scenegraph.g2d.IG2DNode;
23 import org.simantics.scenegraph.g2d.events.EventTypes;
24 import org.simantics.scenegraph.g2d.events.MouseEvent;
25 import org.simantics.scenegraph.g2d.events.MouseEvent.MouseDragBegin;
26 import org.simantics.scenegraph.utils.InitValueSupport;
27 import org.simantics.scenegraph.utils.NodeUtil;
29 public class SingleElementNode extends TransformNode implements InitValueSupport {
31 private static final long serialVersionUID = -4982578347433716440L;
34 private TransferableProvider transferableProvider;
35 protected Composite composite;
36 protected Boolean visible = Boolean.TRUE;
37 protected Boolean hidden = Boolean.FALSE;
39 public void setKey(Object key) {
43 public Object getKey() {
47 public void setTransferableProvider(TransferableProvider transferableProvider) {
48 if (transferableProvider != this.transferableProvider) {
49 if (this.transferableProvider != null)
50 removeEventHandler(this);
51 if (transferableProvider != null)
52 addEventHandler(this);
53 this.transferableProvider = transferableProvider;
58 public boolean validate() {
59 return visible && !hidden;
62 @SyncField("composite")
63 public void setComposite(Composite composite) {
64 this.composite = composite;
68 public void setVisible(Boolean visible) {
69 this.visible = visible;
72 public boolean isVisible() {
77 public void setHidden(Boolean hidden) {
81 public boolean isHidden() {
85 public void beforeRender(Graphics2D g) {
86 g.setRenderingHint(G2DHints.KEY_BEGIN_ELEMENT, "definedElement");
89 public void afterRender(Graphics2D g) {
90 g.setRenderingHint(G2DHints.KEY_ELEMENT_ID, getKey());
91 g.setRenderingHint(G2DHints.KEY_END_ELEMENT, "definedElement");
95 public void render(Graphics2D g) {
96 if (!visible || hidden)
101 Composite oldComposite = null;
102 if(composite != null) {
103 oldComposite = g.getComposite();
104 g.setComposite(composite);
106 if(alphaComposite != null) {
107 if (oldComposite == null)
108 oldComposite = g.getComposite();
109 g.setComposite(alphaComposite);
114 if (oldComposite != null)
115 g.setComposite(oldComposite);
122 public String toString() {
123 StringBuilder sb = new StringBuilder();
124 sb.append(super.toString());
126 if (composite != null) {
127 sb.append("composite=(");
128 AlphaComposite ac = (AlphaComposite) composite;
129 sb.append(ac.getRule());
131 sb.append(ac.getAlpha());
134 sb.append("visible=");
137 return sb.toString();
140 protected Composite alphaComposite = null;
142 @PropertySetter("alpha")
143 @SyncField("alphaComposite")
144 public void setAlphaComposite(Composite alphaComposite) {
145 this.alphaComposite = alphaComposite;
149 public void initValues() {
150 alphaComposite = null;
151 for (IG2DNode node : getSortedNodes()) {
152 if (node instanceof InitValueSupport) {
153 ((InitValueSupport) node).initValues();
159 public void cleanup() {
160 if (transferableProvider != null) {
161 removeEventHandler(this);
162 transferableProvider = null;
167 protected boolean isDragStartEvent(MouseEvent e) {
168 return e.isControlDown();
171 protected boolean hitTest(MouseEvent event) {
172 Rectangle2D bounds = super.getBoundsInLocal(true);
175 Point2D localPos = NodeUtil.worldToLocal(this, event.controlPosition, new Point2D.Double());
176 double x = localPos.getX();
177 double y = localPos.getY();
178 boolean hit = bounds.contains(x, y);
183 protected boolean mouseDragged(MouseDragBegin e) {
184 if (transferableProvider == null
185 || !isDragStartEvent(e)
188 e.transferable = transferableProvider.create();
189 return e.transferable != null;
193 public int getEventMask() {
194 return EventTypes.MouseDragBeginMask;