org.wicketstuff.jquery.ui.slider.SliderBehavior Maven / Gradle / Ivy

Go to download
package org.wicketstuff.jquery.ui.slider;

import org.apache.wicket.Component;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.attributes.AjaxRequestAttributes;
import org.apache.wicket.ajax.attributes.CallbackParameter;
import org.apache.wicket.markup.head.CssHeaderItem;
import org.apache.wicket.markup.head.IHeaderResponse;
import org.apache.wicket.markup.head.JavaScriptHeaderItem;
import org.apache.wicket.request.Request;
import org.apache.wicket.request.cycle.RequestCycle;
import org.apache.wicket.request.resource.PackageResourceReference;
import org.apache.wicket.request.resource.ResourceReference;
import org.wicketstuff.jquery.JQueryBehavior;
import org.wicketstuff.jquery.ui.UIResources;

/**
 * An integration of JQuery UI Slider widget (http://docs.jquery.com/UI/Slider/slider)
 * 
 * @author Martin Grigorov 
 */
public class SliderBehavior extends JQueryBehavior
{

	private static final long serialVersionUID = 1L;

	private static final ResourceReference UI_SLIDER_RESOURCE_REFERENCE = new PackageResourceReference(
		SliderBehavior.class, "ui.slider.js");

	public static final ResourceReference WICKET_SLIDER_JS = new PackageResourceReference(
		SliderBehavior.class, "wicket-jquery.slider.js");

	public SliderBehavior()
	{
	}

	@Override
	protected CharSequence getOnReadyScript()
	{

		final SliderOptions sliderOptions = getSlider().getOptions();

		if (sliderOptions.getOnChange() == null)
		{

			final CharSequence body = getCallbackFunctionBody();

			sliderOptions.setOnChange(body.toString(), "e", "ui");
		}

		final StringBuilder onReady = new StringBuilder("$('#" + getSlider().getMarkupId() +
			"').slider(");
		onReady.append(sliderOptions.toJSON());
		onReady.append(");\n");

		return onReady;
	}

	@Override
	protected void updateAjaxAttributes(AjaxRequestAttributes attributes)
	{
		super.updateAjaxAttributes(attributes);

		// TODO pass 'e' and 'ui' as additional keys in attrs
		CharSequence handleId = "return { handleId: getHandleId(e, ui), value: getValue(e, ui) }";
		attributes.getDynamicExtraParameters().add(handleId);
	}

	@Override
	public void renderHead(Component component, IHeaderResponse response)
	{
		super.renderHead(component, response);
		response.render(CssHeaderItem.forReference(UIResources.FLORA_CSS));
		response.render(CssHeaderItem.forReference(UIResources.FLORA_SLIDER_CSS));
		response.render(JavaScriptHeaderItem.forReference(JQUERY_UI_JS));
		response.render(JavaScriptHeaderItem.forReference(UI_SLIDER_RESOURCE_REFERENCE));
		response.render(JavaScriptHeaderItem.forReference(WICKET_SLIDER_JS));
	}

	@Override
	protected void respond(AjaxRequestTarget target)
	{
		final Request req = RequestCycle.get().getRequest();
		final String handleId = req.getQueryParameters().getParameterValue("handleId").toString();
		final int newValue = req.getQueryParameters().getParameterValue("value").toInt(-1);
		getSlider().onChange(target, handleId, newValue);
	}

	public Slider getSlider()
	{
		return (Slider)getComponent();
	}

}