Synnefo » Pithos Web Client

/*

 * Copyright 2011-2012 GRNET S.A. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or

 * without modification, are permitted provided that the following

 * conditions are met:

 *

 *   1. Redistributions of source code must retain the above

 *      copyright notice, this list of conditions and the following

 *      disclaimer.

 *

 *   2. Redistributions in binary form must reproduce the above

 *      copyright notice, this list of conditions and the following

 *      disclaimer in the documentation and/or other materials

 *      provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGE.

 *

 * The views and conclusions contained in the software and

 * documentation are those of the authors and should not be

 * interpreted as representing official policies, either expressed

 * or implied, of GRNET S.A.

 */

package gr.grnet.pithos.web.client;

import com.google.gwt.dom.client.NativeEvent;

import com.google.gwt.event.dom.client.KeyCodes;

import com.google.gwt.user.client.Event.NativePreviewEvent;

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

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

/**

 * Abstract class, parent of all 'File properties' dialog boxes.

 *

 */

public abstract class AbstractPropertiesDialog extends DialogBox {

        protected static final String MULTIPLE_VALUES_TEXT = "(Multiple values)";

        protected VerticalPanel inner = null;

    protected Pithos app;

        /**

         * The widget's constructor.

         *

         */

        public AbstractPropertiesDialog(Pithos _app) {

        app = _app;

                // Enable IE selection for the dialog (must disable it upon closing it)

                Pithos.enableIESelection();

        }

        /**

         * Accepts any change and updates the file

         * @return 

         *

         */

        protected abstract boolean accept();

        @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:

                                    if (accept())

                                            closeDialog();

                                    break;

                        case KeyCodes.KEY_ESCAPE:

                                closeDialog();

                                break;

                          }

          }

        /**

         * Enables IE selection prevention and hides the dialog

         * (we disable the prevention on creation of the dialog)

         */

        public void closeDialog() {

                Pithos.preventIESelection();

                hide();

        }

}