com.edgenius.wiki.gwt.client.widgets.AutoResizeTextArea.java Source code

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Here is the source code for com.edgenius.wiki.gwt.client.widgets.AutoResizeTextArea.java

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/* 
 * =============================================================
 * Copyright (C) 2007-2011 Edgenius (http://www.edgenius.com)
 * =============================================================
 * License Information: http://www.edgenius.com/licensing/edgenius/2.0/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2.0
 * as published by the Free Software Foundation.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * http://www.gnu.org/licenses/gpl.txt
 *  
 * ****************************************************************
 */
package com.edgenius.wiki.gwt.client.widgets;

import com.edgenius.wiki.gwt.client.KeyCaptureListener;
import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.ui.HTMLPanel;
import com.google.gwt.user.client.ui.TextArea;

/**
 * Work together with jQuery auto-resize plugin to create auto-resize textarea. 
 * 
 * Please use setFocus() to invoke if switch back from invisible deck.
 * 
 * @author Dapeng.Ni
 */
public class AutoResizeTextArea extends TextArea {
    private String id;

    public AutoResizeTextArea() {
        super();
        id = HTMLPanel.createUniqueId();
        Scheduler.get().scheduleDeferred(new ScheduledCommand() {
            public void execute() {
                DOM.setElementAttribute(AutoResizeTextArea.this.getElement(), "id", id);
                initAutoResize(id);
            }
        });
        this.addFocusHandler(KeyCaptureListener.instance());
        this.addBlurHandler(KeyCaptureListener.instance());
    }

    //call native jQuery method to initial auto resize plugin
    private native void initAutoResize(String id)/*-{
                                                 $wnd.$("textarea#"+id).autoResize({
                                                 onResize : function() {
                                                 $wnd.$(this).css({opacity:0.8});
                                                 },
                                                 animateCallback : function() {
                                                 $wnd.$(this).css({opacity:1});
                                                 },
                                                 animateDuration : 300,
                                                 extraSpace : 40
                                                 });
                                                 }-*/;
}