Examples of org.richfaces.component.AbstractPoll

org.richfaces.component.AbstractPoll

The <a4j:poll> component allows periodical sending of Ajax requests to the server. It is used for repeatedly updating a page at specific time intervals.
@author shura


        RendererUtils utils = getUtils();
        boolean shouldRenderForm = utils.getNestingForm(component) == null;
        String rootElementName = shouldRenderForm ? HtmlConstants.DIV_ELEM : HtmlConstants.SPAN_ELEM;


        AbstractPoll poll = (AbstractPoll) component;
        writer.startElement(rootElementName, component);
        writer.writeAttribute(HtmlConstants.STYLE_ATTRIBUTE, "display:none;", null);
        utils.encodeId(context, component);


        if (shouldRenderForm) {
            String clientId = component.getClientId(context) + RendererUtils.DUMMY_FORM_ID;
            utils.encodeBeginForm(context, component, writer, clientId);
            utils.encodeEndForm(context, writer);
        }


        // polling script.
        writer.startElement(HtmlConstants.SCRIPT_ELEM, component);
        writer.writeAttribute(HtmlConstants.TYPE_ATTR, "text/javascript", null);
        StringBuffer script = new StringBuffer("");


        JSFunction function = new JSFunction(AJAX_POLL_FUNCTION);
        Map<String, Object> options = new HashMap<String, Object>();


        RenderKitUtils.addToScriptHash(options, "interval", poll.getInterval(), "1000");
        // RenderKitUtils.addToScriptHash(options, "pollId", component.getClientId(context));
        HandlersChain handlersChain = new HandlersChain(context, poll);
        handlersChain.addInlineHandlerFromAttribute(AbstractPoll.ON_TIMER);
        handlersChain.addBehaviors(AbstractPoll.TIMER);
        handlersChain.addAjaxSubmitFunction();


        String handler = handlersChain.toScript();


        if (handler != null) {
            JSFunctionDefinition timerHandler = new JSFunctionDefinition(JSReference.EVENT);
            timerHandler.addToBody(handler);
            options.put(AbstractPoll.ON_TIMER, timerHandler);
        }
        if (poll.isEnabled()) {
            options.put(ENABLED, true);
        }
        function.addParameter(component.getClientId(context));
        function.addParameter(options);
        // function.appendScript(script);

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    @Override
    protected void doDecode(FacesContext context, UIComponent component) {
        super.doDecode(context, component);


        AbstractPoll poll = (AbstractPoll) component;
        if (poll.isEnabled()) {
            Map<String, String> requestParameterMap = context.getExternalContext().getRequestParameterMap();
            if (requestParameterMap.get(poll.getClientId(context)) != null) {
                new ActionEvent(poll).queue();
                addComponentToAjaxRender(context, component);
            }
        }
    }

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        RendererUtils utils = getUtils();
        boolean shouldRenderForm = utils.getNestingForm(context, component) == null;
        String rootElementName = shouldRenderForm ? HtmlConstants.DIV_ELEM : HtmlConstants.SPAN_ELEM;


        AbstractPoll poll = (AbstractPoll) component;
        writer.startElement(rootElementName, component);
        writer.writeAttribute(HtmlConstants.STYLE_ATTRIBUTE, "display:none;", null);
        utils.encodeId(context, component);


        if (shouldRenderForm) {
            String clientId = component.getClientId(context) + RendererUtils.DUMMY_FORM_ID;
            utils.encodeBeginForm(context, component, writer, clientId);
            utils.encodeEndForm(context, writer);
        }


        // polling script.
        writer.startElement(HtmlConstants.SCRIPT_ELEM, component);
        writer.writeAttribute(HtmlConstants.TYPE_ATTR, "text/javascript", null);
        StringBuffer script = new StringBuffer("");


        JSFunction function = new JSFunction(AJAX_POLL_FUNCTION);
        Map<String, Object> options = new HashMap<String, Object>();


        RenderKitUtils.addToScriptHash(options, "interval", poll.getInterval(), "1000");
        // RenderKitUtils.addToScriptHash(options, "pollId", component.getClientId(context));
        HandlersChain handlersChain = new HandlersChain(context, poll);
        handlersChain.addInlineHandlerFromAttribute(AbstractPoll.ON_TIMER);
        handlersChain.addBehaviors(AbstractPoll.TIMER);
        handlersChain.addAjaxSubmitFunction();


        String handler = handlersChain.toScript();


        if (handler != null) {
            JSFunctionDefinition timerHandler = new JSFunctionDefinition(JSReference.EVENT);
            timerHandler.addToBody(handler);
            options.put(AbstractPoll.ON_TIMER, timerHandler);
        }
        if (poll.isEnabled()) {
            options.put(ENABLED, true);
        }
        function.addParameter(component.getClientId(context));
        function.addParameter(options);
        // function.appendScript(script);

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    @Override
    protected void doDecode(FacesContext context, UIComponent component) {
        super.doDecode(context, component);


        AbstractPoll poll = (AbstractPoll) component;
        if (poll.isEnabled()) {
            Map<String, String> requestParameterMap = context.getExternalContext().getRequestParameterMap();
            if (requestParameterMap.get(poll.getClientId(context)) != null) {
                new ActionEvent(poll).queue();
                addComponentToAjaxRender(context, component);
            }
        }
    }

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Related Classes of org.richfaces.component.AbstractPoll

org.richfaces.renderkit.html.AjaxPollRenderer

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