org.obiba.opal.web.gwt.app.client.view.NotificationView.java Source code

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Here is the source code for org.obiba.opal.web.gwt.app.client.view.NotificationView.java

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/*******************************************************************************
 * Copyright 2008(c) The OBiBa Consortium. All rights reserved.
 *
 * This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package org.obiba.opal.web.gwt.app.client.view;

import java.util.List;

import org.obiba.opal.web.gwt.app.client.event.NotificationEvent;
import org.obiba.opal.web.gwt.app.client.presenter.NotificationPresenter;
import org.obiba.opal.web.gwt.app.client.presenter.NotificationPresenter.NotificationType;
import org.obiba.opal.web.gwt.app.client.support.NotificationAlertTypeMap;
import org.obiba.opal.web.gwt.app.client.support.NotificationMessageBuilder;
import org.obiba.opal.web.gwt.app.client.ui.ListItem;

import com.github.gwtbootstrap.client.ui.Alert;
import com.github.gwtbootstrap.client.ui.base.UnorderedList;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.ui.HTMLPanel;
import com.google.gwt.user.client.ui.Panel;
import com.google.gwt.user.client.ui.Widget;
import com.google.inject.Inject;
import com.gwtplatform.mvp.client.ViewImpl;

import edu.umd.cs.findbugs.annotations.Nullable;

/**
 * View used to display error, warning and info messages in a dialog box.
 */
public class NotificationView extends ViewImpl implements NotificationPresenter.Display {

    interface Binder extends UiBinder<Widget, NotificationView> {
    }

    private static final int DEFAULT_NOTIFICATION_DELAY = 5000;

    private static final int ERROR_NOTIFICATION_DELAY = 10000;

    @UiField
    Panel alertPanel;

    @Inject
    public NotificationView(Binder uiBinder) {
        initWidget(uiBinder.createAndBindUi(this));
    }

    @Override
    public void setNotification(NotificationEvent event) {
        NotificationType type = event.getNotificationType();
        Alert alert = createAlert(type, event.getTitle());
        addMessages(alert, NotificationMessageBuilder.get(event).build());
        alertPanel.add(alert);
        if (!event.isSticky())
            runNonStickyTimer(alert,
                    (NotificationType.ERROR == type ? ERROR_NOTIFICATION_DELAY : DEFAULT_NOTIFICATION_DELAY));
    }

    private Alert createAlert(NotificationType type, @Nullable String title) {
        Alert alert = new Alert();
        alert.setAnimation(true);
        alert.setClose(true);
        if (title != null)
            alert.setHeading(title);
        alert.setType(NotificationAlertTypeMap.getAlertType(type));
        return alert;
    }

    @Override
    public void close() {
        alertPanel.clear();
    }

    private void addMessages(Alert alert, List<String> messages) {

        if (messages.size() == 1) {
            alert.setHTML(messages.get(0));
        } else {
            UnorderedList list = new UnorderedList();
            for (String message : messages) {
                list.add(new ListItem(new HTMLPanel(message)));
            }
            alert.add(list);
        }
    }

    private void runNonStickyTimer(final Alert alert, int delayMillis) {
        Timer nonStickyTimer = new Timer() {

            @Override
            public void run() {
                alert.close();
            }
        };
        nonStickyTimer.schedule(delayMillis);
    }

}