org.jbpm.designer.client.notification.DesignerNotificationPopupsManager Maven / Gradle / Ivy

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/*
 * Copyright 2015 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
*/

package org.jbpm.designer.client.notification;

import java.util.ArrayList;
import java.util.List;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.event.Observes;
import javax.inject.Inject;

import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.Window;
import org.jboss.errai.ioc.client.container.SyncBeanManager;
import org.jboss.errai.security.shared.api.identity.User;
import org.jbpm.designer.notification.DesignerNotificationEvent;
import org.uberfire.client.views.pfly.notifications.NotificationPopupView;
import org.uberfire.client.workbench.widgets.animations.LinearFadeOutAnimation;

@ApplicationScoped
public class DesignerNotificationPopupsManager {

    @Inject
    private SyncBeanManager iocManager;

    @Inject
    private User user;

    //When true we are in the process of removing a notification message
    private boolean removing = false;

    private final static int SPACING = 48;

    private List activeNotifications = new ArrayList();
    private List deactiveNotifications = new ArrayList();


    /**
     * Display a Notification message
     * @param event
     */
    public void addNotification( @Observes final DesignerNotificationEvent event ) {
        if (user.getIdentifier().equals(event.getUserId())) {

            if(event.getNotification() != null && !event.getNotification().equals("openinxmleditor")) {
                //Create a Notification pop-up. Because it is instantiated with CDI we need to manually destroy it when finished
                final NotificationPopupView view = iocManager.lookupBean(NotificationPopupView.class).getInstance();
                activeNotifications.add(view);
                view.setPopupPosition(getMargin(),
                        activeNotifications.size() * SPACING);

                view.setNotification(event.getNotification());
                view.setType(event.getType());
                view.setNotificationWidth(getWidth() + "px");
                view.show(new Command() {

                    @Override
                    public void execute() {
                        //The notification has been shown and can now be removed
                        deactiveNotifications.add(view);
                        remove();
                    }

                });
            }
        }
    }

    //80% of screen width
    private int getWidth() {
        return (int) ( Window.getClientWidth() * 0.8 );
    }

    //10% of screen width
    private int getMargin() {
        return (int) ( ( Window.getClientWidth() - getWidth() ) / 2 );
    }

    //Remove a notification message. Recursive until all pending removals have been completed.
    private void remove() {
        if ( removing ) {
            return;
        }
        if ( deactiveNotifications.size() == 0 ) {
            return;
        }
        removing = true;
        final NotificationPopupView view = deactiveNotifications.get( 0 );
        final LinearFadeOutAnimation fadeOutAnimation = new LinearFadeOutAnimation( view ) {

            @Override
            public void onUpdate( double progress ) {
                super.onUpdate( progress );
                for ( int i = 0; i < activeNotifications.size(); i++ ) {
                    NotificationPopupView v = activeNotifications.get( i );
                    final int left = v.getPopupLeft();
                    final int top = (int) ( ( ( i + 1 ) * SPACING ) - ( progress * SPACING ) );
                    v.setPopupPosition( left,
                            top );
                }
            }

            @Override
            public void onComplete() {
                super.onComplete();
                view.hide();
                deactiveNotifications.remove( view );
                activeNotifications.remove( view );
                iocManager.destroyBean( view );
                removing = false;
                remove();
            }

        };
        fadeOutAnimation.run( 500 );
    }

}