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

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Here is the source code for com.edgenius.wiki.gwt.client.widgets.MessageDialog.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 java.util.ArrayList;
import java.util.List;

import com.edgenius.wiki.gwt.client.Css;
import com.edgenius.wiki.gwt.client.i18n.Msg;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.FlexTable;
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.UIObject;

/**
 * Replacement by javascript alert(), confirm().
 * @author Dapeng.Ni
 */
public class MessageDialog extends DialogBox {
    public static final int TYPE_ALERT = 0;
    public static final int TYPE_CONFIRM = 1;

    private List<MessageDialogListener> listeners;

    public MessageDialog(int type, String caption, String message) {
        this(null, type, caption, message);
    }

    public MessageDialog(UIObject parent, int type, String caption, String message) {
        super(parent);

        if (caption != null)
            this.setText(caption);
        else {
            if (type == TYPE_CONFIRM) {
                this.setText(Msg.consts.confirm());
                this.setIcon(new Image(IconBundle.I.get().comment()));
            } else {
                this.setText(Msg.consts.alert());
                this.setIcon(new Image(IconBundle.I.get().warning()));
            }
        }

        this.addStyleName(Css.MESSAGE_DIALOG);
        ButtonBar btnBar = getButtonBar();
        FlexTable panel = new FlexTable();

        if (type == TYPE_CONFIRM) {
            panel.setWidget(0, 0, new Image(LargeIconBundle.I.get().question()));

            Button okBtn = new Button(Msg.consts.ok(), ButtonIconBundle.tickImage());
            Button cancelBtn = new Button(Msg.consts.cancel(), ButtonIconBundle.crossImage());
            okBtn.addClickHandler(new ClickHandler() {
                public void onClick(ClickEvent event) {
                    confirmEvent();
                    MessageDialog.this.hidebox();
                }
            });
            cancelBtn.addClickHandler(new ClickHandler() {
                public void onClick(ClickEvent event) {
                    cancelEvent();
                    MessageDialog.this.hidebox();
                }

            });
            btnBar.add(cancelBtn);
            btnBar.add(okBtn);
        } else if (type == TYPE_ALERT) {
            panel.setWidget(0, 0, new Image(LargeIconBundle.I.get().warning()));
            Button okBtn = new Button(Msg.consts.ok(), ButtonIconBundle.tickImage());
            okBtn.addClickHandler(new ClickHandler() {
                public void onClick(ClickEvent event) {
                    MessageDialog.this.hidebox();
                }

            });
            btnBar.add(okBtn);
        }

        Label lb = new Label(message);
        lb.setStyleName(Css.MESSAGE);
        panel.setWidget(0, 1, lb);
        panel.getCellFormatter().setWidth(0, 1, "99%");
        panel.getFlexCellFormatter().setVerticalAlignment(0, 1, HasVerticalAlignment.ALIGN_MIDDLE);
        panel.setWidth("100%");

        this.setWidget(panel);
    }

    public void addMessageListener(MessageDialogListener lis) {
        if (listeners == null)
            listeners = new ArrayList<MessageDialogListener>();

        listeners.add(lis);
    }

    private void confirmEvent() {
        if (listeners != null) {
            for (MessageDialogListener lis : listeners) {
                lis.confirmed();
            }
        }
    }

    private void cancelEvent() {
        if (listeners != null) {
            for (MessageDialogListener lis : listeners) {
                lis.cancelled();
            }
        }

    }

    /**
     * @param confirmMsg
     * @return
     */
    public static void confirm(String message, MessageDialogListener callback) {
        final MessageDialog dlg = new MessageDialog(TYPE_CONFIRM, Msg.consts.confirm(), message);
        dlg.addMessageListener(callback);
        dlg.addMessageListener(new MessageDialogListener() {
            public void confirmed() {
                dlg.hidebox();
            }

            public void cancelled() {
                dlg.hidebox();
            }
        });
        dlg.showbox();
    }
}