001/*
002 * (C) Copyright 2006-2008 Nuxeo SAS (http://nuxeo.com/) and contributors.
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the GNU Lesser General Public License
006 * (LGPL) version 2.1 which accompanies this distribution, and is available at
007 * http://www.gnu.org/licenses/lgpl.html
008 *
009 * This library is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * Contributors:
015 *     troger
016 *
017 * $Id$
018 */
019
020package org.nuxeo.ecm.platform.annotations.gwt.client.view.annotater;
021
022import org.nuxeo.ecm.platform.annotations.gwt.client.controler.AnnotationController;
023
024import com.google.gwt.user.client.DOM;
025import com.google.gwt.user.client.Event;
026
027/**
028 * @author <a href="mailto:troger@nuxeo.com">Thomas Roger</a>
029 */
030public abstract class AbstractAnnotater implements Annotater {
031
032    protected final AnnotationController controller;
033
034    private final boolean eventPreventDefault;
035
036    private boolean onMouseDown, onMouseMove = false;
037
038    public AbstractAnnotater(AnnotationController controller, boolean eventPreventDefault) {
039        this.controller = controller;
040        this.eventPreventDefault = eventPreventDefault;
041    }
042
043    public void manageEvent(Event event) {
044        if (!controller.canCreateNewCreationPopup() || !controller.canAnnotate()) {
045            return;
046        }
047
048        if (eventPreventDefault) {
049            DOM.eventPreventDefault(event);
050        }
051
052        switch (event.getTypeInt()) {
053        case Event.ONMOUSEDOWN:
054            onMouseDown(event);
055            break;
056        case Event.ONMOUSEMOVE:
057            onMouseMove(event);
058            break;
059        case Event.ONMOUSEUP:
060            onMouseUp(event);
061            break;
062        case Event.ONMOUSEOUT:
063            onMouseOut(event);
064            break;
065        }
066    }
067
068    public void onMouseDown(Event event) {
069        onMouseDown = true;
070    }
071
072    public void onMouseMove(Event event) {
073        if (onMouseDown) {
074            onMouseMove = true;
075        }
076    }
077
078    public void onMouseUp(Event event) {
079        onMouseDown = onMouseMove = false;
080    }
081
082    public void onMouseOut(Event event) {
083        onMouseUp(event);
084    }
085
086    public boolean hasMoved() {
087        return onMouseMove;
088    }
089
090    protected void addAnnotationPopup() {
091        controller.addNewAnnotation();
092    }
093
094}