org.gss_project.gss.web.client.QuitDialog.java Source code

Introduction

Here is the source code for org.gss_project.gss.web.client.QuitDialog.java

Source

/*
 * Copyright 2007, 2008, 2009 Electronic Business Systems Ltd.
 *
 * This file is part of GSS.
 *
 * GSS is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * GSS 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 GSS.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.gss_project.gss.web.client;

import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.NativeEvent;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.user.client.Event.NativePreviewEvent;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.DialogBox;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HasHorizontalAlignment;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.VerticalPanel;

/**
 * The 'quit' dialog box.
 */
public class QuitDialog extends DialogBox {

    /**
     * The widget's constructor.
     */
    public QuitDialog() {
        Configuration conf = (Configuration) GWT.create(Configuration.class);
        String service = conf.serviceName();
        setText("Quit " + service);

        VerticalPanel outer = new VerticalPanel();
        HorizontalPanel buttons = new HorizontalPanel();

        HTML text = new HTML("Are you sure you want to quit " + service + "?");
        text.setStyleName("gss-AboutText");
        outer.add(text);

        // Create the 'Quit' button, along with a listener that hides the dialog
        // when the button is clicked and quits the application.
        Button quit = new Button("Quit", new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                hide();
                GSS.get().logout();
            }
        });
        buttons.add(quit);
        buttons.setCellHorizontalAlignment(quit, HasHorizontalAlignment.ALIGN_CENTER);
        // Create the 'Cancel' button, along with a listener that hides the
        // dialog when the button is clicked.
        Button cancel = new Button("Cancel", new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                hide();
            }
        });
        buttons.add(cancel);
        buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);
        buttons.setSpacing(8);
        outer.add(buttons);
        outer.setCellHorizontalAlignment(buttons, HasHorizontalAlignment.ALIGN_CENTER);
        setWidget(outer);
    }

    @Override
    protected void onPreviewNativeEvent(NativePreviewEvent preview) {
        super.onPreviewNativeEvent(preview);

        NativeEvent evt = preview.getNativeEvent();
        if (evt.getType().equals("keydown"))
            // Use the popup's key preview hooks to close the dialog when either
            // enter or escape is pressed.
            switch (evt.getKeyCode()) {
            case KeyCodes.KEY_ENTER:
                hide();
                GSS.get().logout();
                break;
            case KeyCodes.KEY_ESCAPE:
                hide();
                break;
            }
    }

}