Examples of com.vaadin.client.ApplicationConnection

com.vaadin.client.ApplicationConnection
This is the client side communication "engine", managing client-server communication with its server side counterpart com.vaadin.server.VaadinService. Client-side connectors receive updates from the corresponding server-side connector (typically component) as state updates or RPC calls. The connector has the possibility to communicate back with its server side counter part through RPC calls. TODO document better Entry point classes (widgetsets) define onModuleLoad().

                     * handled. E.g. hidden on start, removed in drophandler ->
                     * would flicker in case removed eagerly.
                     */
                    final ComponentConnector dragSource = currentDrag
                            .getTransferable().getDragSource();
                    final ApplicationConnection client = currentDropHandler
                            .getApplicationConnection();
                    Scheduler.get().scheduleFixedDelay(new RepeatingCommand() {
                        @Override
                        public boolean execute() {
                            if (!client.hasActiveRequest()) {
                                removeActiveDragSourceStyleName(dragSource);
                                return false;
                            }
                            return true;
                        }

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    private void doRequest(DragEventType drop) {
        if (currentDropHandler == null) {
            return;
        }
        ComponentConnector paintable = currentDropHandler.getConnector();
        ApplicationConnection client = currentDropHandler
                .getApplicationConnection();
        /*
         * For drag events we are using special id that are routed to
         * "drag service" which then again finds the corresponding DropHandler
         * on server side.
         * 
         * TODO add rest of the data in Transferable
         * 
         * TODO implement partial updates to Transferable (currently the whole
         * Transferable is sent on each request)
         */
        visitId++;
        client.updateVariable(ApplicationConstants.DRAG_AND_DROP_CONNECTOR_ID,
                "visitId", visitId, false);
        client.updateVariable(ApplicationConstants.DRAG_AND_DROP_CONNECTOR_ID,
                "eventId", currentDrag.getEventId(), false);
        client.updateVariable(ApplicationConstants.DRAG_AND_DROP_CONNECTOR_ID,
                "dhowner", paintable, false);


        VTransferable transferable = currentDrag.getTransferable();


        client.updateVariable(ApplicationConstants.DRAG_AND_DROP_CONNECTOR_ID,
                "component", transferable.getDragSource(), false);


        client.updateVariable(ApplicationConstants.DRAG_AND_DROP_CONNECTOR_ID,
                "type", drop.ordinal(), false);


        if (currentDrag.getCurrentGwtEvent() != null) {
            try {
                MouseEventDetails mouseEventDetails = MouseEventDetailsBuilder
                        .buildMouseEventDetails(currentDrag
                                .getCurrentGwtEvent());
                currentDrag.getDropDetails().put("mouseEvent",
                        mouseEventDetails.serialize());
            } catch (Exception e) {
                // NOP, (at least oophm on Safari) can't serialize html dd event
                // to mouseevent
            }
        } else {
            currentDrag.getDropDetails().put("mouseEvent", null);
        }
        client.updateVariable(ApplicationConstants.DRAG_AND_DROP_CONNECTOR_ID,
                "evt", currentDrag.getDropDetails(), false);


        client.updateVariable(ApplicationConstants.DRAG_AND_DROP_CONNECTOR_ID,
                "tra", transferable.getVariableMap(), true);


    }

View Full Code Here

        return dragElement;
    }


    private void attachDragElement() {
        if (dragElement != null && dragElement.getParentElement() == null) {
            ApplicationConnection connection = getCurrentDragApplicationConnection();
            Element dragImageParent;
            if (connection == null) {
                VConsole.error("Could not determine ApplicationConnection for current drag operation. The drag image will likely look broken");
                dragImageParent = RootPanel.getBodyElement();
            } else {

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                /*
                 * Make a wild guess and use the first available
                 * ApplicationConnection. This is better than than leaving the
                 * exception completely unstyled...
                 */
                ApplicationConnection connection = ApplicationConfiguration
                        .getRunningApplications().get(0);
                owner = connection.getUIConnector().getWidget();
            }
            VNotification
                    .createNotification(VNotification.DELAY_FOREVER, owner)
                    .show("<h1>Uncaught client side exception</h1><br />"
                            + exceptionText, VNotification.CENTERED, "error");

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     * @return the overlay container element for the current
     *         {@link ApplicationConnection} or another element if the current
     *         {@link ApplicationConnection} cannot be determined.
     */
    public com.google.gwt.user.client.Element getOverlayContainer() {
        ApplicationConnection ac = getApplicationConnection();
        if (ac == null) {
            // could not figure out which one we belong to, styling will
            // probably fail
            Logger.getLogger(getClass().getSimpleName())
                    .log(Level.WARNING,

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