com.edgenius.wiki.gwt.client.space.SpaceLogoForm.java Source code

Introduction

Here is the source code for com.edgenius.wiki.gwt.client.space.SpaceLogoForm.java

Source

/* 
 * =============================================================
 * 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.space;

import java.util.Iterator;
import java.util.Vector;

import com.edgenius.wiki.gwt.client.Css;
import com.edgenius.wiki.gwt.client.GwtClientUtils;
import com.edgenius.wiki.gwt.client.i18n.Msg;
import com.edgenius.wiki.gwt.client.model.SpaceModel;
import com.edgenius.wiki.gwt.client.server.utils.SharedConstants;
import com.edgenius.wiki.gwt.client.widgets.Button;
import com.edgenius.wiki.gwt.client.widgets.ButtonBar;
import com.edgenius.wiki.gwt.client.widgets.MessageWidget;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.FileUpload;
import com.google.gwt.user.client.ui.FormPanel;
import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteEvent;
import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteHandler;
import com.google.gwt.user.client.ui.FormPanel.SubmitEvent;
import com.google.gwt.user.client.ui.FormPanel.SubmitHandler;
import com.google.gwt.user.client.ui.Hidden;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.SimplePanel;
import com.google.gwt.user.client.ui.VerticalPanel;

/**
 * @author Dapeng.Ni
 */
public class SpaceLogoForm extends SimplePanel implements SubmitHandler, SubmitCompleteHandler {
    private Hidden spaceUname = new Hidden("spaceUname");
    private Vector<SpaceUpdateListener> listener = new Vector<SpaceUpdateListener>();
    private MessageWidget message = new MessageWidget();

    public SpaceLogoForm() {
        final FormPanel form = new FormPanel();
        form.setAction(GwtClientUtils.getBaseUrl() + "space/logo.do");
        form.setMethod(FormPanel.METHOD_POST);
        form.setEncoding(FormPanel.ENCODING_MULTIPART);
        form.addSubmitHandler(this);
        form.addSubmitCompleteHandler(this);

        VerticalPanel panel = new VerticalPanel();
        panel.add(message);
        panel.add(spaceUname);
        HorizontalPanel h1 = new HorizontalPanel();
        Label uploadLabel = new Label(Msg.consts.logo());
        uploadLabel.setStyleName(Css.FORM_LABEL);
        FileUpload upload = new FileUpload();
        upload.setName("file");
        h1.add(uploadLabel);
        h1.add(upload);
        panel.add(h1);

        form.setWidget(panel);

        //
        Button update = new Button(Msg.consts.update());
        update.addClickHandler(new ClickHandler() {
            public void onClick(ClickEvent event) {
                form.submit();
            }
        });
        Button cancel = new Button(Msg.consts.cancel());
        cancel.addClickHandler(new ClickHandler() {
            public void onClick(ClickEvent event) {
                //return to link panel
                for (Iterator<SpaceUpdateListener> iter = listener.iterator(); iter.hasNext();) {
                    iter.next().spaceUpdateCancelled();
                }
            }
        });

        ButtonBar btnBar = new ButtonBar();
        btnBar.add(update);
        btnBar.add(cancel);

        VerticalPanel main = new VerticalPanel();
        main.add(form);
        main.add(btnBar);
        setWidget(main);
    }

    public void onSubmit(SubmitEvent event) {
        boolean errors = false;
        message.fadeout();
        //if there are errors, cancel login
        if (errors)
            event.cancel();
    }

    public void onSubmitComplete(SubmitCompleteEvent event) {
        String rs = GwtClientUtils.getFormResult(event);
        if (rs == null)
            return;
        if (!rs.startsWith(SharedConstants.FORM_RET_HEADER + SharedConstants.FORM_RET_ERROR)) {
            //show real picture
            int index = rs.indexOf(SharedConstants.LOGO_SEP);
            String small = rs, large = rs;
            if (index != -1) {
                small = rs.substring(0, index);
                large = rs.substring(index + 1);
            }
            for (Iterator<SpaceUpdateListener> iter = listener.iterator(); iter.hasNext();) {
                iter.next().logoUpdated(small, large);
            }
        } else {
            //error on upload, keep original image and show error message.
            message.error("Unable upload image, try again.");
        }
    }

    public void fillFields(SpaceModel model) {
        spaceUname.setValue(model.unixName);
    }

    public void addListener(SpaceUpdateListener lis) {
        listener.add(lis);
    }
}