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.g2d.G2DRenderingHints;
21 import org.simantics.scenegraph.g2d.IG2DNode;
22 import org.simantics.scenegraph.g2d.events.EventTypes;
23 import org.simantics.scenegraph.g2d.events.MouseEvent;
24 import org.simantics.scenegraph.g2d.events.MouseEvent.MouseDragBegin;
25 import org.simantics.scenegraph.utils.InitValueSupport;
26 import org.simantics.scenegraph.utils.NodeUtil;
28 public class SingleElementNode extends TransformNode implements InitValueSupport {
30 private static final long serialVersionUID = -4982578347433716440L;
32 private TransferableProvider transferableProvider;
33 protected Composite composite;
34 protected Boolean visible = Boolean.TRUE;
35 protected Boolean hidden = Boolean.FALSE;
36 private transient Object key;
38 public void setKey(Object key) {
42 public Object getKey() {
46 public void setTransferableProvider(TransferableProvider transferableProvider) {
47 if (transferableProvider != this.transferableProvider) {
48 if (this.transferableProvider != null)
49 removeEventHandler(this);
50 if (transferableProvider != null)
51 addEventHandler(this);
52 this.transferableProvider = transferableProvider;
57 public boolean validate() {
58 return visible && !hidden;
61 @SyncField("composite")
62 public void setComposite(Composite composite) {
63 this.composite = composite;
67 public void setVisible(Boolean visible) {
68 this.visible = visible;
71 public boolean isVisible() {
76 public void setHidden(Boolean hidden) {
80 public boolean isHidden() {
85 public void render(Graphics2D g) {
86 if (!visible || hidden)
89 Composite oldComposite = null;
90 if(composite != null) {
91 oldComposite = g.getComposite();
92 g.setComposite(composite);
94 if(alphaComposite != null) {
95 if (oldComposite == null)
96 oldComposite = g.getComposite();
97 g.setComposite(alphaComposite);
102 if (oldComposite != null)
103 g.setComposite(oldComposite);
107 public String toString() {
108 StringBuilder sb = new StringBuilder();
109 sb.append(super.toString());
111 if (composite != null) {
112 sb.append("composite=(");
113 AlphaComposite ac = (AlphaComposite) composite;
114 sb.append(ac.getRule());
116 sb.append(ac.getAlpha());
119 sb.append("visible=");
122 return sb.toString();
125 protected Composite alphaComposite = null;
127 @PropertySetter("alpha")
128 @SyncField("alphaComposite")
129 public void setAlphaComposite(Composite alphaComposite) {
130 this.alphaComposite = alphaComposite;
134 public void initValues() {
135 alphaComposite = null;
136 for (IG2DNode node : getSortedNodes()) {
137 if (node instanceof InitValueSupport) {
138 ((InitValueSupport) node).initValues();
144 public void cleanup() {
145 if (transferableProvider != null) {
146 removeEventHandler(this);
147 transferableProvider = null;
152 protected boolean isDragStartEvent(MouseEvent e) {
153 return e.isControlDown();
156 protected boolean hitTest(MouseEvent event) {
157 Rectangle2D bounds = super.getBoundsInLocal(true);
160 Point2D localPos = NodeUtil.worldToLocal(this, event.controlPosition, new Point2D.Double());
161 double x = localPos.getX();
162 double y = localPos.getY();
163 boolean hit = bounds.contains(x, y);
168 protected boolean mouseDragged(MouseDragBegin e) {
169 if (transferableProvider == null
170 || !isDragStartEvent(e)
173 e.transferable = transferableProvider.create();
174 return e.transferable != null;
178 public int getEventMask() {
179 return EventTypes.MouseDragBeginMask;
182 public void beforeRender(Graphics2D g) {
183 g.setRenderingHint(G2DRenderingHints.KEY_BEGIN_ELEMENT, "definedElement");
186 public void afterRender(Graphics2D g) {
187 g.setRenderingHint(G2DRenderingHints.KEY_END_ELEMENT, "definedElement");