dk.teachus.frontend.components.form.TextAreaElement.java Source code

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Here is the source code for dk.teachus.frontend.components.form.TextAreaElement.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package dk.teachus.frontend.components.form;

import org.apache.wicket.Component;
import org.apache.wicket.feedback.ComponentFeedbackMessageFilter;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.form.FormComponent;
import org.apache.wicket.markup.html.form.TextArea;
import org.apache.wicket.markup.html.panel.FeedbackPanel;
import org.apache.wicket.model.AbstractReadOnlyModel;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.Model;
import org.apache.wicket.validation.IValidator;

import dk.teachus.frontend.components.form.ElementModifier.BehaviorAdder;

public class TextAreaElement extends FormElement implements ValidationProducer<String> {
    private static final long serialVersionUID = 1L;
    private TextArea<String> inputField;
    private FeedbackPanel feedbackPanel;

    public TextAreaElement(String label, IModel<String> inputModel) {
        this(label, inputModel, false);
    }

    public TextAreaElement(String label, IModel<String> inputModel, final boolean required) {
        add(new Label("label", label).setRenderBodyOnly(true));

        IModel<String> requiredModel = new AbstractReadOnlyModel<String>() {
            private static final long serialVersionUID = 1L;

            @Override
            public String getObject() {
                return required ? "*" : "&nbsp;";
            }
        };
        add(new Label("required", requiredModel).setEscapeModelStrings(false));

        feedbackPanel = new FeedbackPanel("feedback");
        feedbackPanel.setOutputMarkupId(true);
        add(feedbackPanel);

        inputField = new TextArea<String>("inputField", inputModel);
        inputField.setRequired(required);
        inputField.setLabel(new Model<String>(label));
        add(inputField);

        feedbackPanel.setFilter(new ComponentFeedbackMessageFilter(inputField));
    }

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

        add(new ElementModifier("onchange"));
    }

    public Component add(IValidator<String> validator) {
        return inputField.add(validator);
    }

    public void add(BehaviorAdder adder) {
        inputField.add(adder.createNewBehavior());
    }

    public FormComponent<String> getFormComponent() {
        return inputField;
    }

    public boolean hasError() {
        return inputField.hasErrorMessage();
    }

    public Component[] inputInvalid() {
        return new Component[] { feedbackPanel };
    }

    public Component[] inputValid() {
        return new Component[] { feedbackPanel };
    }
}