Examples of com.vaadin.terminal.gwt.client.UIDL

com.vaadin.terminal.gwt.client.UIDL
When a component is updated, it's client side widget's {@link Paintable#updateFromUIDL(UIDL,ApplicationConnection) updateFromUIDL()} will be called with the updated ("changes") UIDL receivedfrom the server.
UIDL is hierarchical, and there are a few methods to retrieve the children, {@link #getChildCount()}, {@link #getChildIterator()}{@link #getChildString(int)}, {@link #getChildUIDL(int)}.

It can be helpful to keep in mind that UIDL was originally modeled in XML, so it's structure is very XML -like. For instance, the first to children in the underlying UIDL representation will contain the "tag" name and attributes, but will be skipped by the methods mentioned above.

        add.setEnabled(enabled);
        remove.setEnabled(enabled);
        options.clear();
        selections.clear();
        for (final Iterator<?> i = uidl.getChildIterator(); i.hasNext();) {
            final UIDL optionUidl = (UIDL) i.next();
            if (optionUidl.hasAttribute("selected")) {
                selections.addItem(optionUidl.getStringAttribute("caption"),
                        optionUidl.getStringAttribute("key"));
            } else {
                options.addItem(optionUidl.getStringAttribute("caption"),
                        optionUidl.getStringAttribute("key"));
            }
        }


        int cols = -1;
        if (getColumns() > 0) {

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        LinkedList<Cell> pendingCells = new LinkedList<Cell>();


        LinkedList<Cell> relativeHeighted = new LinkedList<Cell>();


        for (final Iterator<?> i = uidl.getChildIterator(); i.hasNext();) {
            final UIDL r = (UIDL) i.next();
            if ("gr".equals(r.getTag())) {
                for (final Iterator<?> j = r.getChildIterator(); j.hasNext();) {
                    final UIDL c = (UIDL) j.next();
                    if ("gc".equals(c.getTag())) {
                        Cell cell = getCell(c);
                        if (cell.hasContent()) {
                            boolean rendered = cell.renderIfNoRelativeWidth();
                            cell.alignment = alignments[alignmentIndex++];
                            if (!rendered) {

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        }
        if (uidl.hasAttribute("rows")) {
            rows = uidl.getIntAttribute("rows");
        }


        final UIDL ops = uidl.getChildUIDL(0);


        if (getColumns() > 0) {
            container.setWidth(getColumns() + "em");
            if (container != optionsContainer) {
                optionsContainer.setWidth("100%");

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             */
            suggestionPopup.menu.clearItems();


        }


        final UIDL options = uidl.getChildUIDL(0);
        totalMatches = uidl.getIntAttribute("totalMatches");


        String captions = inputPrompt;


        for (final Iterator<?> i = options.getChildIterator(); i.hasNext();) {
            final UIDL optionUidl = (UIDL) i.next();
            final FilterSelectSuggestion suggestion = new FilterSelectSuggestion(
                    optionUidl);
            currentSuggestions.add(suggestion);
            if (optionUidl.hasAttribute("selected")) {
                if (!filtering || popupOpenerClicked) {
                    setPromptingOff(suggestion.getReplacementString());
                    selectedOptionKey = "" + suggestion.getOptionKey();
                }
                currentSuggestion = suggestion;

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         * Render content after all tabs have been created and we know how large
         * the content area is
         */
        if (selectedUIDLItemIndex >= 0) {
            StackItem selectedItem = getStackItem(selectedUIDLItemIndex);
            UIDL selectedTabUIDL = lazyUpdateMap.remove(selectedItem);
            open(selectedUIDLItemIndex);


            selectedItem.setContent(selectedTabUIDL);
        } else if (!uidl.getBooleanAttribute("cached") && openTab != null) {
            close(openTab);

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     * @param tabUidl
     * @return
     */
    private StackItem moveStackItemIfNeeded(StackItem item, int newIndex,
            UIDL tabUidl) {
        UIDL tabContentUIDL = null;
        Paintable tabContent = null;
        if (tabUidl.getChildCount() > 0) {
            tabContentUIDL = tabUidl.getChildUIDL(0);
            tabContent = client.getPaintable(tabContentUIDL);
        }

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                mapAttribute = uidl.getMapAttribute("css");
            }


            for (final Iterator<Object> i = uidl.getChildIterator(); i
                    .hasNext();) {
                final UIDL r = (UIDL) i.next();
                final Paintable child = client.getPaintable(r);
                if (oldWidgets.contains(child)) {
                    oldWidgets.remove(child);
                    VCaption vCaption = widgetToCaption.get(child);
                    if (vCaption != null) {
                        add(vCaption);
                        oldWidgets.remove(vCaption);
                    }
                }


                add((Widget) child);
                if (mapAttribute != null && mapAttribute.containsKey(r.getId())) {
                    String css = null;
                    try {
                        Style style = ((Widget) child).getElement().getStyle();
                        css = mapAttribute.getString(r.getId());
                        String[] cssRules = css.split(";");
                        for (int j = 0; j < cssRules.length; j++) {
                            String[] rule = cssRules[j].split(":");
                            if (rule.length == 0) {
                                continue;
                            } else {
                                style.setProperty(
                                        makeCamelCase(rule[0].trim()),
                                        rule[1].trim());
                            }
                        }
                    } catch (Exception e) {
                        VConsole.log("CssLayout encounterd invalid css string: "
                                + css);
                    }
                }


                if (!r.getBooleanAttribute("cached")) {
                    child.updateFromUIDL(r, client);
                }
            }


            // loop oldWidgetWrappers that where not re-attached and unregister

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    }


    private void updateActionMap(UIDL c) {
        final Iterator<?> it = c.getChildIterator();
        while (it.hasNext()) {
            final UIDL action = (UIDL) it.next();
            final String key = action.getStringAttribute("key");
            final String caption = action.getStringAttribute("caption");
            actionMap.put(key + "_c", caption);
            if (action.hasAttribute("icon")) {
                // TODO need some uri handling ??
                actionMap.put(key + "_i", client.translateVaadinUri(action
                        .getStringAttribute("icon")));
            } else {
                actionMap.remove(key + "_i");
            }
        }

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        }


        body.clear();
        TreeNode childTree = null;
        for (final Iterator<?> i = uidl.getChildIterator(); i.hasNext();) {
            final UIDL childUidl = (UIDL) i.next();
            if ("actions".equals(childUidl.getTag())) {
                updateActionMap(childUidl);
                continue;
            } else if ("-ac".equals(childUidl.getTag())) {
                updateDropHandler(childUidl);
                continue;
            }
            childTree = new TreeNode();
            if (childTree.ie6compatnode != null) {

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        private void renderChildNodes(Iterator<?> i) {
            childNodeContainer.clear();
            childNodeContainer.setVisible(true);
            while (i.hasNext()) {
                final UIDL childUidl = (UIDL) i.next();
                // actions are in bit weird place, don't mix them with children,
                // but current node's actions
                if ("actions".equals(childUidl.getTag())) {
                    updateActionMap(childUidl);
                    continue;
                }
                final TreeNode childTree = new TreeNode();
                if (ie6compatnode != null) {

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