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

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Here is the source code for com.edgenius.wiki.gwt.client.widgets.Button.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.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Element;
import com.google.gwt.user.client.ui.Image;

/**
 * @author Dapeng.Ni
 */
public class Button extends com.google.gwt.user.client.ui.Button {

    private Element txtSpan = null;
    private Image defaultIcon;
    private Image currentIcon;

    public Button(String html) {
        super(html);
    }

    /**
     * @param html
     */
    public Button(String html, Image icon) {
        super(html);

        setIcon(icon);

    }

    public void setHTML(String text) {
        setText(text);
    }

    public void setText(String text) {
        Element child = DOM.getChild(this.getElement(), 0);
        int txtIdx = 0;
        if (child != null && child.toString().indexOf("img") != -1) {
            //first is image, then try to put text after it
            txtIdx = 1;
            txtSpan = DOM.getChild(this.getElement(), txtIdx);
        }

        if (txtSpan == null) {
            txtSpan = DOM.createSpan();
            DOM.setInnerHTML(txtSpan, text);
        }
        DOM.insertChild(this.getElement(), txtSpan, txtIdx);
    }

    /**
     * Please note, don't use this method to busy indicator image! Otherwise this button default icon will be overwrite.
     * Use setBusy() method instead.
     * 
     * @param createImage
     */
    public void setIcon(Image newIcon) {
        this.setIcon(newIcon, true);
    }

    public void setEnabled(boolean enable) {
        this.setBusy(!enable);
    }

    public void setBusy(boolean busy) {
        super.setEnabled(!busy);

        if (busy) {
            if (this.defaultIcon != null) {
                this.setIcon(IconBundle.I.indicator(), false);
            }
        } else {
            this.setIcon(this.defaultIcon, true);
        }
    }

    private void setIcon(Image newIcon, boolean isDefault) {
        if (newIcon != null) {
            if (currentIcon != null)
                DOM.removeChild(this.getElement(), currentIcon.getElement());

            this.currentIcon = newIcon;
            if (isDefault) {
                this.defaultIcon = newIcon;
            }
            newIcon.removeFromParent();
            if (txtSpan != null)
                DOM.insertBefore(this.getElement(), newIcon.getElement(), txtSpan);
            else
                DOM.appendChild(this.getElement(), newIcon.getElement());
        }
    }
}