fr.aliasource.webmail.client.DisclosurePanelHeader.java Source code

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Here is the source code for fr.aliasource.webmail.client.DisclosurePanelHeader.java

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/* ***** BEGIN LICENSE BLOCK *****
 * Version: GPL 2.0
 *
 * The contents of this file are subject to the GNU General Public
 * License Version 2 or later (the "GPL").
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Initial Developer of the Original Code is
 *   MiniG.org project members
 *
 * ***** END LICENSE BLOCK ***** */

package fr.aliasource.webmail.client;

import com.google.gwt.event.logical.shared.CloseEvent;
import com.google.gwt.event.logical.shared.CloseHandler;
import com.google.gwt.event.logical.shared.OpenEvent;
import com.google.gwt.event.logical.shared.OpenHandler;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Element;
import com.google.gwt.user.client.ui.DisclosurePanel;
import com.google.gwt.user.client.ui.HasText;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.Widget;

public class DisclosurePanelHeader extends Widget
        implements HasText, OpenHandler<DisclosurePanel>, CloseHandler<DisclosurePanel> {

    /**
     * imageTD holds the image for the icon, not null. labelTD holds the text
     * for the label.
     */
    private final Element labelTD;
    private Element imageTD;
    private final Image open;
    private final Image close;
    private Image iconImage;
    private DisclosurePanel disclosurePanel;

    public DisclosurePanelHeader(String text, DisclosurePanel dp) {

        this.disclosurePanel = dp;
        this.open = new Image("minig/images/open.png");
        this.close = new Image("minig/images/close.png");
        iconImage = this.disclosurePanel.isOpen() ? open : close;

        Element root = DOM.createTable();
        root.setAttribute("cellspacing", "0");
        root.setAttribute("cellpadding", "0");
        Element tbody = DOM.createTBody();
        Element tr = DOM.createTR();
        imageTD = DOM.createTD();
        labelTD = DOM.createTD();

        setElement(root);

        DOM.appendChild(root, tbody);
        DOM.appendChild(tbody, tr);
        DOM.appendChild(tr, imageTD);
        DOM.appendChild(tr, labelTD);

        // set image TD to be same width as image.
        DOM.setElementProperty(imageTD, "align", "center");
        DOM.setElementProperty(imageTD, "valign", "middle");
        DOM.setStyleAttribute(imageTD, "width", iconImage.getWidth() + "px");

        DOM.appendChild(imageTD, iconImage.getElement());

        setText(text);

        dp.addOpenHandler(this);
        dp.addCloseHandler(this);
        setStyle();
    }

    public final String getText() {
        return DOM.getInnerText(labelTD);
    }

    @Override
    public final void onClose(CloseEvent<DisclosurePanel> event) {
        setStyle();
    }

    @Override
    public final void onOpen(OpenEvent<DisclosurePanel> event) {
        setStyle();
    }

    public final void setText(String text) {
        DOM.setInnerText(labelTD, text);
    }

    private void setStyle() {
        if (disclosurePanel.isOpen()) {
            imageTD.removeChild(iconImage.getElement());
            iconImage = open;
            imageTD.appendChild(iconImage.getElement());
        } else {
            imageTD.removeChild(iconImage.getElement());
            iconImage = close;
            imageTD.appendChild(iconImage.getElement());
        }
    }
}