com.objetdirect.gwt.umlapi.client.helpers.CursorIconManager.java Source code

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Here is the source code for com.objetdirect.gwt.umlapi.client.helpers.CursorIconManager.java

Source

/*
 * This file is part of the GWTUML project and was written by Mounier Florian <mounier-dot-florian.at.gmail'dot'com> for Objet Direct
 * <http://wwww.objetdirect.com>
 * 
 * Copyright  2009 Objet Direct Contact: gwtuml@googlegroups.com
 * 
 * GWTUML is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later version.
 * 
 * GWTUML is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License along with GWTUML. If not, see <http://www.gnu.org/licenses/>.
 */
package com.objetdirect.gwt.umlapi.client.helpers;

import com.google.gwt.user.client.ui.Widget;
import com.objetdirect.gwt.umlapi.client.resources.Resources;
import com.objetdirect.gwt.umlapi.client.resources.styles.IconStyles;

/**
 * This class is an helper to change the current mouse cursor
 * 
 * @author Florian Mounier (mounier-dot-florian.at.gmail'dot'com)
 * @contributor Raphal Brugier(raphael dot brugier at gmail dot com)
 */
public class CursorIconManager {

    /**
     * This enumeration lists all the cursor available for the canvas.
     * 
     * @author Florian Mounier (mounier-dot-florian.at.gmail'dot'com)
     */
    public enum PointerStyle {

        /**
         * Auto cursor
         */
        AUTO(iconStyles().autoCursor()),
        /**
         * Crosshair cursor
         */
        CROSSHAIR(iconStyles().crossHairCursor()),
        /**
         * Move cursor
         */
        MOVE(iconStyles().moveCursor());

        private final String cssName;

        private PointerStyle(final String cssName) {
            this.cssName = cssName;
        }
    }

    /**
     * Convenience method to get the styles class string.
     * 
     * @return
     */
    private static IconStyles iconStyles() {
        return Resources.INSTANCE.iconStyles();
    }

    private String currentStyleApplied;

    public CursorIconManager() {
        currentStyleApplied = null;
    }

    public void changeCursorIcon(PointerStyle cursor, Widget widget) {
        if (currentStyleApplied != null) {
            widget.removeStyleName(currentStyleApplied);
        }

        widget.addStyleName(cursor.cssName);
        currentStyleApplied = cursor.cssName;
    }
}