com.edgenius.wiki.gwt.client.user.SendMessageDialog.java Source code

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Here is the source code for com.edgenius.wiki.gwt.client.user.SendMessageDialog.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.user;

import com.edgenius.wiki.gwt.client.ClientConstants;
import com.edgenius.wiki.gwt.client.ControllerFactory;
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.MessageListModel;
import com.edgenius.wiki.gwt.client.server.NotificationControllerAsync;
import com.edgenius.wiki.gwt.client.server.utils.SharedConstants;
import com.edgenius.wiki.gwt.client.server.utils.StringUtil;
import com.edgenius.wiki.gwt.client.widgets.AutoResizeTextArea;
import com.edgenius.wiki.gwt.client.widgets.Button;
import com.edgenius.wiki.gwt.client.widgets.ButtonBar;
import com.edgenius.wiki.gwt.client.widgets.DialogBox;
import com.edgenius.wiki.gwt.client.widgets.IconBundle;
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.event.dom.client.KeyUpEvent;
import com.google.gwt.event.dom.client.KeyUpHandler;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.FormPanel;
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.HasHorizontalAlignment;
import com.google.gwt.user.client.ui.HasVerticalAlignment;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.VerticalPanel;

/**
 * @author Dapeng.Ni
 */
public class SendMessageDialog extends DialogBox
        implements SubmitHandler, AsyncCallback<MessageListModel>, KeyUpHandler {
    private VerticalPanel panel = new VerticalPanel();
    private MessageWidget message = new MessageWidget();
    private AutoResizeTextArea contentBox = new AutoResizeTextArea();
    private String username;
    private Label limit = new Label(String.valueOf(ClientConstants.LIMIT_CHAR));

    public SendMessageDialog(String username) {
        this.username = username;
        this.setText(Msg.consts.send_message());
        this.setIcon(new Image(IconBundle.I.get().message()));
        final FormPanel form = new FormPanel();
        form.setMethod(FormPanel.METHOD_POST);
        form.addSubmitHandler(this);
        form.setStyleName(Css.FORM);
        form.setWidget(panel);

        Label header = new Label(Msg.params.send_message_to(username));
        panel.add(header);
        header.setStyleName(Css.HEADING2);
        panel.setCellHorizontalAlignment(header, HasHorizontalAlignment.ALIGN_CENTER);

        panel.add(message);
        panel.add(limit);
        limit.setStyleName(Css.TWEET_COUNTER);
        panel.setCellHorizontalAlignment(limit, HasHorizontalAlignment.ALIGN_RIGHT);

        panel.add(contentBox);
        contentBox.addKeyUpHandler(this);

        ButtonBar btnBar = getButtonBar();
        Button send = new Button(Msg.consts.send());
        Button cancel = new Button(Msg.consts.cancel());
        send.addClickHandler(new ClickHandler() {
            public void onClick(ClickEvent event) {
                form.submit();
            }
        });
        cancel.addClickHandler(new ClickHandler() {
            public void onClick(ClickEvent event) {
                SendMessageDialog.this.hidebox();
            }
        });
        btnBar.add(cancel);
        btnBar.add(send);

        panel.setSize("100%", "100%");
        contentBox.setStyleName(Css.TWEET_BOX);

        panel.setVerticalAlignment(HasVerticalAlignment.ALIGN_BOTTOM);
        panel.setCellHorizontalAlignment(contentBox, HasHorizontalAlignment.ALIGN_CENTER);

        this.setWidget(form);
    }

    public void onSubmit(SubmitEvent evt) {
        String text = contentBox.getText();
        if (!StringUtil.isBlank(text)) {
            NotificationControllerAsync notifyController = ControllerFactory.getNotificationController();
            notifyController.sendMessage(SharedConstants.MSG_TARGET_USER, username, text, false, this);
        } else {
            message.error(Msg.params.can_be_empty(Msg.consts.message()));
        }

        //always cancel
        evt.cancel();
    }

    public void onFailure(Throwable error) {
        GwtClientUtils.processError(error);
    }

    public void onSuccess(MessageListModel model) {
        if (!GwtClientUtils.preSuccessCheck(model, message)) {
            return;
        }
        this.hidebox();
    }

    public void onKeyUp(KeyUpEvent event) {
        if (contentBox.getText().length() > ClientConstants.LIMIT_CHAR) {
            contentBox.setText(contentBox.getText().substring(0, ClientConstants.LIMIT_CHAR));
        }
        limit.setText(String.valueOf(ClientConstants.LIMIT_CHAR - contentBox.getText().length()));
    }

}