ColorPickerPanel.java

/* (c) 2014 - 2016 Open Source Geospatial Foundation - all rights reserved
 * (c) 2001 - 2013 OpenPlans
 * This code is licensed under the GPL 2.0 license, available at the root
 * application directory.
 */
package org.geoserver.web.data.store.panel;

import java.awt.Color;
import java.util.Locale;

import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.form.validation.FormComponentFeedbackBorder;
import org.apache.wicket.markup.html.panel.Panel;
import org.apache.wicket.model.IModel;
import org.apache.wicket.util.convert.IConverter;
import org.apache.wicket.validation.IValidator;
import org.geoserver.web.wicket.ColorPickerField;

/**
 * A label with a text field. Can receive custom validators for the text field.
 * 
 * @author Gabriel Roldan
 */
public class ColorPickerPanel extends Panel {

	private static final long serialVersionUID = 6661147317307298452L;

        /**
	 * 
	 * @param validators
	 *            any extra validator that should be added to the input field,
	 *            or {@code null}
	 */
	public ColorPickerPanel(final String id, final IModel paramVale,
			final IModel paramLabelModel, final boolean required,
			IValidator... validators) {
		// make the value of the text field the model of this panel, for easy
		// value retriaval
		super(id, paramVale);

		// the label
		String requiredMark = required ? " *" : ""; 
		Label label = new Label("paramName", paramLabelModel.getObject() + requiredMark);
		add(label);

		// the color picker. Notice that we need to convert between RRGGBB and
		// #RRGGBB,
		ColorPickerField textField = new ColorPickerField("paramValue", paramVale) {
                    private static final long serialVersionUID = 4185457152965032989L;

                    @SuppressWarnings("unchecked")
                    @Override
                    public <C> IConverter<C> getConverter(Class<C> type) {
                        if (type.isAssignableFrom(String.class)) {
                            return (IConverter<C>) new IConverter<String>() {            
                                private static final long serialVersionUID = 4343895199315509104L;

                                public String convertToString(String input, Locale locale) {
                                    if (input.startsWith("#")) {
                                        return input.substring(1);
                                    } else {
                                        return input;
                                    }
                                }
                
                                public String convertToObject(String value, Locale locale) {
                                    if (value.equals(""))
                                        return value;
                                    return "#" + value;
                                }
                            };
                        }
                        return super.getConverter(type);
                    }
		};
		textField.setRequired(required);
		// set the label to be the paramLabelModel otherwise a validation error
		// would look like
		// "Parameter 'paramValue' is required"
		textField.setLabel(paramLabelModel);

		if (validators != null) {
			for (IValidator validator : validators) {
				textField.add(validator);
			}
		}
		FormComponentFeedbackBorder feedback = new FormComponentFeedbackBorder(
				"border");
		feedback.add(textField);
		add(feedback);
	}
}