protected void renderComponent()

in tapestry-framework/src/org/apache/tapestry/form/ImageSubmit.java [49:141]
47 lines of code
11 McCabe index (conditional complexity)

    protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle)
    {
        IForm form = getForm(cycle);

        boolean rewinding = form.isRewinding();

        String nameOverride = getNameOverride();

        String name =
            nameOverride == null ? form.getElementId(this) : form.getElementId(this, nameOverride);

        if (rewinding)
        {
            // If disabled, do nothing.

            if (isDisabled())
                return;

            RequestContext context = cycle.getRequestContext();

            // Image clicks get submitted as two request parameters: 
            // foo.x and foo.y

            String parameterName = name + ".x";

            String value = context.getParameter(parameterName);

            if (value == null)
                return;

            // The point parameter is not really used, unless the
            // ImageButton is used for its original purpose (as a kind
            // of image map).  In modern usage, we only care about
            // whether the user clicked on the image (and thus submitted
            // the form), not where in the image the user actually clicked.

            IBinding pointBinding = getPointBinding();

            if (pointBinding != null)
            {
                int x = Integer.parseInt(value);

                parameterName = name + ".y";
                value = context.getParameter(parameterName);

                int y = Integer.parseInt(value);

                pointBinding.setObject(new Point(x, y));
            }

            // Notify the application, by setting the select parameter
            // to the tag parameter.

            IBinding selectedBinding = getSelectedBinding();

            if (selectedBinding != null)
                selectedBinding.setObject(getTag());

            IActionListener listener = getListener();

            if (listener != null)
                listener.actionTriggered(this, cycle);

            return;
        }

        // Not rewinding, do the real render

        boolean disabled = isDisabled();
        IAsset disabledImage = getDisabledImage();

        IAsset finalImage = (disabled && disabledImage != null) ? disabledImage : getImage();

        String imageURL = finalImage.buildURL(cycle);

        writer.beginEmpty("input");
        writer.attribute("type", "image");
        writer.attribute("name", name);

        if (disabled)
            writer.attribute("disabled", "disabled");

        // NN4 places a border unless you tell it otherwise.
        // IE ignores the border attribute and never shows a border.

        writer.attribute("border", 0);

        writer.attribute("src", imageURL);

        renderInformalParameters(writer, cycle);

        writer.closeTag();
    }