Synnefo

/*

 * Copyright 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 gr.ebs.gss.client;

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

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

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.KeyboardListener;

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

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

/**

 * A dialog for requesting confirmation from the user.

 *

 * @author kman

 */

public abstract class ConfirmationDialog extends DialogBox {

        /**

         * The widget's constructor.

         *

         * @param message the message to display

         * @param buttonLabel the label of the confirmation button

         */

        public ConfirmationDialog(String message, String buttonLabel) {

                // Set the dialog's caption.

                setText("Confirmation");

                setAnimationEnabled(true);

                // Create a VerticalPanel to contain the label and the buttons.

                VerticalPanel outer = new VerticalPanel();

                HorizontalPanel buttons = new HorizontalPanel();

                HTML text = new HTML("<table><tr><td rowspan='2'>" + MessagePanel.images.warn().getHTML() +

                                        "</td><td>" + message + "</td></tr></table>");

                text.setStyleName("gss-warnMessage");

                outer.add(text);

                // Create the 'Update' button, along with a listener that hides the dialog

                // when the button is clicked and renames the file.

                Button ok = new Button(buttonLabel, new ClickListener() {

                        public void onClick(Widget sender) {

                                confirm();

                                hide();

                        }

                });

                buttons.add(ok);

                buttons.setCellHorizontalAlignment(ok, 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 ClickListener() {

                        public void onClick(Widget sender) {

                                hide();

                                cancel();

                        }

                });

                buttons.add(cancel);

                buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);

                buttons.setSpacing(8);

                buttons.setStyleName("gss-warnMessage");

                outer.setStyleName("gss-warnMessage");

                outer.add(buttons);

                outer.setCellHorizontalAlignment(text, HasHorizontalAlignment.ALIGN_CENTER);

                outer.setCellHorizontalAlignment(buttons, HasHorizontalAlignment.ALIGN_CENTER);

                setWidget(outer);

        }

        @Override

        public boolean onKeyDownPreview(final char key, final int modifiers) {

                // Use the popup's key preview hooks to close the dialog when either

                // enter or escape is pressed.

                switch (key) {

                        case KeyboardListener.KEY_ENTER:

                                hide();

                                confirm();

                                break;

                        case KeyboardListener.KEY_ESCAPE:

                                hide();

                                cancel();

                                break;

                }

                return true;

        }

        public abstract void confirm();

        public abstract void cancel();

}