--- /dev/null
+/*******************************************************************************
+ * Copyright (c) 2012 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.maps.eclipse;
+
+import org.simantics.g2d.canvas.Hints;
+import org.simantics.g2d.canvas.ICanvasContext;
+import org.simantics.g2d.canvas.impl.AbstractCanvasParticipant;
+import org.simantics.g2d.canvas.impl.SGNodeReflection.SGCleanup;
+import org.simantics.g2d.canvas.impl.SGNodeReflection.SGInit;
+import org.simantics.maps.sg.MapNode;
+import org.simantics.scenegraph.g2d.G2DParentNode;
+import org.simantics.scenegraph.g2d.events.EventHandlerReflection.EventHandler;
+import org.simantics.scenegraph.g2d.events.command.CommandEvent;
+import org.simantics.scenegraph.g2d.events.command.Commands;
+import org.simantics.utils.datastructures.hints.HintListenerAdapter;
+import org.simantics.utils.datastructures.hints.IHintListener;
+import org.simantics.utils.datastructures.hints.IHintObservable;
+import org.simantics.utils.datastructures.hints.IHintContext.Key;
+import org.simantics.utils.datastructures.hints.IHintContext.KeyOf;
+
+/**
+ * MapPainter is an ICanvasContext participant that uses the scene graph
+ * {@link MapNode} to draw tiled maps in the background of the canvas.
+ *
+ * @author J-P Laine
+ *
+ * @see MapNode
+ */
+public class MapPainter extends AbstractCanvasParticipant {
+
+ /**
+ * Grid enabled status. Default value is True
+ */
+ public static final Key KEY_MAP_ENABLED = new KeyOf(Boolean.class);
+
+ public static final double ZOOM_IN_LIMIT = 10000000.0;
+
+ public static final double ZOOM_OUT_LIMIT = 10.0;
+
+ IHintListener mapListener = new HintListenerAdapter() {
+ public void hintChanged(IHintObservable sender, Key key, Object oldValue, Object newValue) {
+ ICanvasContext cc = getContext();
+ if (cc != null) {
+ updateNode();
+ cc.getContentContext().setDirty();
+ }
+ }
+ };
+
+ protected MapNode node = null;
+
+ private int scale;
+
+ public MapPainter(int scale) {
+ this.scale = scale;
+ }
+
+ @Override
+ public void addedToContext(ICanvasContext ctx) {
+ super.addedToContext(ctx);
+ getHintStack().addKeyHintListener(getThread(), KEY_MAP_ENABLED, mapListener);
+ }
+
+ @Override
+ public void removedFromContext(ICanvasContext ctx) {
+ getHintStack().removeKeyHintListener(getThread(), KEY_MAP_ENABLED, mapListener);
+ super.removedFromContext(ctx);
+ }
+
+ @EventHandler(priority = 0)
+ public boolean handleKeyEvent(CommandEvent e) {
+ if (e.command.equals( Commands.MAP_ENABLE )) {
+ setEnabled(true);
+ updateNode();
+ setDirty();
+ return true;
+ } else if (e.command.equals( Commands.MAP_DISABLE )) {
+ setEnabled(false);
+ updateNode();
+ setDirty();
+ return true;
+ } else if (e.command.equals( Commands.MAP_TOGGLE )) {
+ setEnabled(!isMapEnabled());
+ updateNode();
+ setDirty();
+ return true;
+ }
+ return false;
+ }
+
+ @SGInit
+ public void initSG(G2DParentNode parent) {
+ node = parent.addNode("map", MapNode.class);
+ node.setScale(scale);
+ node.setEnabled(true);
+ node.setZIndex(Integer.MIN_VALUE + 999); // Just under the grid
+ }
+
+ @SGCleanup
+ public void cleanupSG() {
+ node.remove();
+ }
+
+ protected void updateNode() {
+ node.setEnabled(isPaintingEnabled());
+ }
+
+ boolean isPaintingEnabled() {
+ boolean enabled = isMapEnabled();
+ Boolean globalDisable = getHint(Hints.KEY_DISABLE_PAINTING);
+ return enabled && !Boolean.TRUE.equals(globalDisable);
+ }
+
+ public boolean isMapEnabled() {
+ Boolean enabled = getHint(KEY_MAP_ENABLED);
+ return !Boolean.FALSE.equals(enabled);
+ }
+
+ public void setEnabled(boolean enabled) {
+ setHint(KEY_MAP_ENABLED, enabled);
+ }
+
+}