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Openlayer3 components that leverage Wicket Bootstrap

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package org.wicketstuff.openlayers3.component;

import org.apache.wicket.behavior.AttributeAppender;
import org.apache.wicket.markup.head.CssHeaderItem;
import org.apache.wicket.markup.head.IHeaderResponse;
import org.apache.wicket.markup.html.WebMarkupContainer;
import org.apache.wicket.markup.html.panel.GenericPanel;
import org.apache.wicket.model.IModel;
import org.apache.wicket.request.resource.CssResourceReference;
import org.wicketstuff.openlayers3.api.util.Color;

/**
 * Provides a marker that may be placed on a amp.
 */
public class Marker extends GenericPanel {
	private static final long serialVersionUID = 1L;

	/**
     * Creates a new instance.
     *
     * @param id
     *         Wicket element ID for the marker
     * @param color
     *         Model with the color of the marker
     */
    public Marker(final String id, final IModel color) {
        super(id, color);
    }

    @Override
    protected void onInitialize() {
        super.onInitialize();

        add(new WebMarkupContainer("pin")
	    .add(new AttributeAppender("style", getBackgroundColorModel())));
    }

    @Override
    public void renderHead(IHeaderResponse response) {
        super.renderHead(response);
        response.render(CssHeaderItem.forReference(new CssResourceReference(Marker.class,
                "Marker.css")));
    }

    /**
     * Returns a model with the CSS for specifying the marker color.
     *
     * @return Model with the CSS marker color
     */
	private IModel getBackgroundColorModel() {
		return new IModel() {
			private static final long serialVersionUID = 1L;

			@Override
			public String getObject() {
				return "background-color: " + getModelObject() + ";";
			}
		};
	}
}