X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.g2d%2Fsrc%2Forg%2Fsimantics%2Fg2d%2Fdnd%2FDnDContext.java;h=86e7e00374ee89f072a595328cb68949a9b16607;hb=00a0eae4da98b701fa38a6813b1743b754c5c99e;hp=6a036cb2c08e77cc809c1933acf304d90a5afdbf;hpb=969bd23cab98a79ca9101af33334000879fb60c5;p=simantics%2Fplatform.git diff --git a/bundles/org.simantics.g2d/src/org/simantics/g2d/dnd/DnDContext.java b/bundles/org.simantics.g2d/src/org/simantics/g2d/dnd/DnDContext.java index 6a036cb2c..86e7e0037 100644 --- a/bundles/org.simantics.g2d/src/org/simantics/g2d/dnd/DnDContext.java +++ b/bundles/org.simantics.g2d/src/org/simantics/g2d/dnd/DnDContext.java @@ -1,106 +1,106 @@ -/******************************************************************************* - * 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. - * - * WARNING DnDContext is not as thread-safe as its base implementation - * {@link Context}. - * - * @author Tuukka Lehtonen - */ -public class DnDContext extends Context implements IDnDContext { - - IHintContext hintCtx = new HintContext(); - - List orderedItems = new ArrayList(); - - Map itemPositions = new HashMap(); - - 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()]); - } - -} +/******************************************************************************* + * 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. + * + * WARNING DnDContext is not as thread-safe as its base implementation + * {@link Context}. + * + * @author Tuukka Lehtonen + */ +public class DnDContext extends Context implements IDnDContext { + + IHintContext hintCtx = new HintContext(); + + List orderedItems = new ArrayList(); + + Map itemPositions = new HashMap(); + + 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()]); + } + +}