-/*******************************************************************************\r
- * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
- * in Industry THTH ry.\r
- * All rights reserved. This program and the accompanying materials\r
- * are made available under the terms of the Eclipse Public License v1.0\r
- * which accompanies this distribution, and is available at\r
- * http://www.eclipse.org/legal/epl-v10.html\r
- *\r
- * Contributors:\r
- * VTT Technical Research Centre of Finland - initial API and implementation\r
- *******************************************************************************/\r
-/*\r
- *\r
- * @author Toni Kalajainen\r
- */\r
-package org.simantics.g2d.dnd;\r
-\r
-import java.awt.geom.Point2D;\r
-import java.util.ArrayList;\r
-import java.util.HashMap;\r
-import java.util.List;\r
-import java.util.Map;\r
-\r
-import org.simantics.utils.datastructures.context.Context;\r
-import org.simantics.utils.datastructures.hints.HintContext;\r
-import org.simantics.utils.datastructures.hints.IHintContext;\r
-\r
-/**\r
- * Contains an ordered set of context items (see {@link #orderedItems}) which\r
- * works around the fact that {@link Context} base implementation does not\r
- * preserve any kind of order information for the added drag items, which is\r
- * often useful for user experience's sake.\r
- * \r
- * <b>WARNING</b> DnDContext is not as thread-safe as its base implementation\r
- * {@link Context}.\r
- * \r
- * @author Tuukka Lehtonen\r
- */\r
-public class DnDContext extends Context<IDragItem> implements IDnDContext {\r
-\r
- IHintContext hintCtx = new HintContext();\r
-\r
- List<IDragItem> orderedItems = new ArrayList<IDragItem>();\r
-\r
- Map<IDragItem, Point2D> itemPositions = new HashMap<IDragItem, Point2D>();\r
-\r
- public DnDContext() {\r
- super(IDragItem.class);\r
- }\r
-\r
- @Override\r
- public IHintContext getHints() {\r
- return hintCtx;\r
- }\r
-\r
- @Override\r
- public synchronized void setItemPosition(IDragItem item, Point2D pos) {\r
- if (item == null)\r
- throw new NullPointerException("trying to set position " + pos + " for null IDragItem");\r
- if (pos == null)\r
- throw new NullPointerException("trying to set null position for dragged item " + item);\r
- itemPositions.put(item, pos);\r
- }\r
-\r
- @Override\r
- public synchronized Point2D getItemPosition(IDragItem item) {\r
- return itemPositions.get(item);\r
- }\r
-\r
- @Override\r
- public void add(IDragItem item) {\r
- assertNotDisposed();\r
- orderedItems.add(item);\r
- boolean added = false;\r
- try {\r
- super.add(item);\r
- added = true;\r
- } finally {\r
- if (!added)\r
- orderedItems.remove(item);\r
- }\r
- }\r
-\r
- @Override\r
- public boolean remove(IDragItem item) {\r
- assertNotDisposed();\r
- boolean existed = super.remove(item);\r
- if (existed)\r
- orderedItems.remove(item);\r
- return existed;\r
- }\r
-\r
- @Override\r
- public void clear() {\r
- assertNotDisposed();\r
- orderedItems.clear();\r
- super.clear();\r
- }\r
-\r
- @Override\r
- public IDragItem[] toArray() {\r
- assertNotDisposed();\r
- return orderedItems.toArray(new IDragItem[orderedItems.size()]);\r
- }\r
-\r
-}\r
+/*******************************************************************************
+ * 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
+ *******************************************************************************/
+/*
+ *
+ * @author Toni Kalajainen
+ */
+package org.simantics.g2d.dnd;
+
+import java.awt.geom.Point2D;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.simantics.utils.datastructures.context.Context;
+import org.simantics.utils.datastructures.hints.HintContext;
+import org.simantics.utils.datastructures.hints.IHintContext;
+
+/**
+ * Contains an ordered set of context items (see {@link #orderedItems}) which
+ * works around the fact that {@link Context} base implementation does not
+ * preserve any kind of order information for the added drag items, which is
+ * often useful for user experience's sake.
+ *
+ * <b>WARNING</b> DnDContext is not as thread-safe as its base implementation
+ * {@link Context}.
+ *
+ * @author Tuukka Lehtonen
+ */
+public class DnDContext extends Context<IDragItem> implements IDnDContext {
+
+ IHintContext hintCtx = new HintContext();
+
+ List<IDragItem> orderedItems = new ArrayList<IDragItem>();
+
+ Map<IDragItem, Point2D> itemPositions = new HashMap<IDragItem, Point2D>();
+
+ public DnDContext() {
+ super(IDragItem.class);
+ }
+
+ @Override
+ public IHintContext getHints() {
+ return hintCtx;
+ }
+
+ @Override
+ public synchronized void setItemPosition(IDragItem item, Point2D pos) {
+ if (item == null)
+ throw new NullPointerException("trying to set position " + pos + " for null IDragItem");
+ if (pos == null)
+ throw new NullPointerException("trying to set null position for dragged item " + item);
+ itemPositions.put(item, pos);
+ }
+
+ @Override
+ public synchronized Point2D getItemPosition(IDragItem item) {
+ return itemPositions.get(item);
+ }
+
+ @Override
+ public void add(IDragItem item) {
+ assertNotDisposed();
+ orderedItems.add(item);
+ boolean added = false;
+ try {
+ super.add(item);
+ added = true;
+ } finally {
+ if (!added)
+ orderedItems.remove(item);
+ }
+ }
+
+ @Override
+ public boolean remove(IDragItem item) {
+ assertNotDisposed();
+ boolean existed = super.remove(item);
+ if (existed)
+ orderedItems.remove(item);
+ return existed;
+ }
+
+ @Override
+ public void clear() {
+ assertNotDisposed();
+ orderedItems.clear();
+ super.clear();
+ }
+
+ @Override
+ public IDragItem[] toArray() {
+ assertNotDisposed();
+ return orderedItems.toArray(new IDragItem[orderedItems.size()]);
+ }
+
+}
Code Review / simantics / platform.git / blobdiff