package org.jbpm.designer.client.notification;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.Window;
import org.jboss.errai.ioc.client.container.SyncBeanManager;
import org.jbpm.designer.notification.DesignerNotificationEvent;
import org.uberfire.client.workbench.widgets.notifications.NotificationPopupView;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.event.Observes;
import javax.inject.Inject;
import java.util.ArrayList;
import java.util.List;
import org.uberfire.client.workbench.widgets.animations.LinearFadeOutAnimation;
@ApplicationScoped
public class DesignerNotificationPopupsManager {
@Inject
private SyncBeanManager iocManager;
//When true we are in the process of removing a notification message
private boolean removing = false;
private final int SPACING = 48;
private List<NotificationPopupView> activeNotifications = new ArrayList<NotificationPopupView>();
private List<NotificationPopupView> deactiveNotifications = new ArrayList<NotificationPopupView>();
/**
* Display a Notification message
* @param event
*/
public void addNotification( @Observes final DesignerNotificationEvent event ) {
//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 );
}
}