examples/aeri.rcp/src/aeri/rcp/DemoNotificationSupport.java

package aeri.rcp;

import javax.inject.Inject;

import org.eclipse.e4.core.contexts.IEclipseContext;
import org.eclipse.e4.ui.di.UISynchronize;
import org.eclipse.e4.ui.services.IServiceConstants;
import org.eclipse.jface.dialogs.PopupDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;

/**
 * Primitive, not fully implemented notification service. For illustration purpose only.
 */
public class DemoNotificationSupport {

    private UISynchronize sync;
    private IEclipseContext context;

    @Inject
    public DemoNotificationSupport(UISynchronize sync, IEclipseContext context) {
        this.sync = sync;
        this.context = context;
    }

    private PopupDialog popup;

    public void showNewLogEventNotification(LogEvent group) {
        sync.asyncExec(new Runnable() {

            @Override
            public void run() {
                closePopup();
                Shell parent = (Shell) context.get(IServiceConstants.ACTIVE_SHELL);
                popup = new NewLogEventPopup(parent);
                popup.open();
            }

        });
    }

    public void showNewResponseNotification(LogEvent group) {
        sync.asyncExec(new Runnable() {

            @Override
            public void run() {
                closePopup();
                Shell parent = (Shell) context.get(IServiceConstants.ACTIVE_SHELL);
                popup = new NewResponsePopup(parent);
                popup.open();
            }
        });
    }

    private void closePopup() {
        if (popup != null) {
            popup.close();
        }
    }

    private abstract static class NotificationPopup extends PopupDialog {

        private static final int POPUP_OFFSET = 20;

        public NotificationPopup(Shell parent) {
            super(parent, PopupDialog.INFOPOPUPRESIZE_SHELLSTYLE | SWT.MODELESS, false, false, false, false, false, "An error was logged.",
                    null);
            setBlockOnOpen(false);
        }

        @Override
        protected Point getInitialLocation(Point initialSize) {
            Shell parent = getParentShell();
            Point parentSize, parentLocation;

            if (parent != null) {
                parentSize = parent.getSize();
                parentLocation = parent.getLocation();
            } else {
                Rectangle bounds = getShell().getDisplay().getBounds();
                parentSize = new Point(bounds.width, bounds.height);
                parentLocation = new Point(0, 0);
            }
            // We have to take parent location into account because SWT considers all
            // shell locations to be in display coordinates, even if the shell is parented.
            return new Point(parentSize.x - initialSize.x + parentLocation.x - POPUP_OFFSET,
                    parentSize.y - initialSize.y + parentLocation.y - POPUP_OFFSET);
        }
    }

    private static class NewLogEventPopup extends NotificationPopup {

        public NewLogEventPopup(Shell parent) {
            super(parent);
        }

        @Override
        protected Control createDialogArea(Composite parent) {
            setTitleText("An Error was Logged Popup");

            Composite container = (Composite) super.createDialogArea(parent);
            Label label = new Label(container, SWT.NONE);
            label.setText("An error was logged. Please... - TODO create your app specifc popup");
            return container;
        }
    }

    private static class NewResponsePopup extends NotificationPopup {

        public NewResponsePopup(Shell parent) {
            super(parent);
        }

        @Override
        protected Control createDialogArea(Composite parent) {
            setTitleText("Thank you!");
            Composite container = (Composite) super.createDialogArea(parent);
            Label label = new Label(container, SWT.NONE);
            label.setText("You report was forwarded to the service team for triage. Thank you for reporting this issue.");
            return container;
        }
    }
}