Synnefo » Pithos Web Client

/*

 * Copyright 2012-2013 GRNET S.A. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or

 * without modification, are permitted provided that the following

 * conditions are met:

 *

 *   1. Redistributions of source code must retain the above

 *      copyright notice, this list of conditions and the following

 *      disclaimer.

 *

 *   2. Redistributions in binary form must reproduce the above

 *      copyright notice, this list of conditions and the following

 *      disclaimer in the documentation and/or other materials

 *      provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGE.

 *

 * The views and conclusions contained in the software and

 * documentation are those of the authors and should not be

 * interpreted as representing official policies, either expressed

 * or implied, of GRNET S.A.

 */

package gr.grnet.pithos.web.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.resources.client.ClientBundle;

import com.google.gwt.resources.client.CssResource;

import com.google.gwt.resources.client.ImageResource;

import com.google.gwt.user.client.ui.*;

public class PithosDisclosurePanel extends Composite {

        public interface Style extends CssResource {

                String disclosurePanel();

                String header();

                String arrow();

                String content();

        }

        public interface Resources extends ClientBundle {

                @Source("PithosDisclosurePanel.css")

                Style pithosDisclosurePanelCss();

                @Source("upArrow.png")

                ImageResource icon();

                @Source("upArrow.png")

                ImageResource open();

                @Source("downArrow.png")

                ImageResource closed();

        @Source("gr/grnet/pithos/resources/ajax-loader.gif")

        ImageResource ajaxLoader();

        }

        private final DisclosurePanel panel;

    private final Resources resources;

    private final String title;

    public PithosDisclosurePanel(final Resources _resources, final String title, boolean open) {

        this(_resources, title, false, open);

    }

        public PithosDisclosurePanel(final Resources _resources, final String title, boolean ajaxLoader, boolean open) {

        this.title = title;

                this.resources = _resources;

                resources.pithosDisclosurePanelCss().ensureInjected();

                this.panel = new DisclosurePanel();

                panel.addStyleName(resources.pithosDisclosurePanelCss().disclosurePanel());

                panel.setHeader(createHeader(resources, title, ajaxLoader, open));

                panel.setOpen(open);

        if(!ajaxLoader) {

            addOpenCloseHandlers();

        }

                initWidget(panel);

        }

    private void addOpenCloseHandlers() {

        panel.addOpenHandler(new OpenHandler<DisclosurePanel>() {

            @Override

            public void onOpen(OpenEvent<DisclosurePanel> event) {

                panel.setHeader(createHeader(resources, title, false, true));

            }

        });

        panel.addCloseHandler(new CloseHandler<DisclosurePanel>() {

            @Override

            public void onClose(CloseEvent<DisclosurePanel> event) {

                panel.setHeader(createHeader(resources, title, false, false));

            }

        });

    }

    public void setLoaded(boolean open) {

        this.panel.setHeader(createHeader(resources, title, false, open));

        addOpenCloseHandlers();

    }

        Widget createHeader(Resources resources, String title, boolean ajaxLoader, boolean open) {

                HorizontalPanel header = new HorizontalPanel();

                Image img = new Image(resources.icon());

                header.add(img);

                header.setCellVerticalAlignment(img, HasVerticalAlignment.ALIGN_MIDDLE);

                header.setCellWidth(img, "32px");

                HTML titleHtml = new HTML(title);

                header.add(titleHtml);

                header.setCellVerticalAlignment(titleHtml, HasVerticalAlignment.ALIGN_MIDDLE);

                Image arrow = new Image(ajaxLoader ? resources.ajaxLoader() : open ? resources.open() : resources.closed());

                arrow.addStyleName(resources.pithosDisclosurePanelCss().arrow());

                header.add(arrow);

                header.setCellHorizontalAlignment(arrow, HasHorizontalAlignment.ALIGN_RIGHT);

                header.setCellVerticalAlignment(arrow, HasVerticalAlignment.ALIGN_MIDDLE);

                header.addStyleName(resources.pithosDisclosurePanelCss().header());

                return header;

        }

        public void setContent(Widget widget) {

                panel.setContent(widget);

                panel.getContent().removeStyleName("content");

                panel.getContent().addStyleName(resources.pithosDisclosurePanelCss().content());

        }

}