Java tutorial
/* * Copyright (c) 2010-2013 Evolveum * * Licensed 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 com.evolveum.midpoint.web.component.form.multivalue; import com.evolveum.midpoint.web.component.util.SimplePanel; import com.evolveum.midpoint.web.component.util.VisibleEnableBehaviour; import org.apache.commons.lang.StringUtils; import org.apache.wicket.ajax.AjaxRequestTarget; import org.apache.wicket.ajax.form.AjaxFormComponentUpdatingBehavior; import org.apache.wicket.ajax.markup.html.AjaxLink; import org.apache.wicket.behavior.AttributeAppender; import org.apache.wicket.feedback.ComponentFeedbackMessageFilter; import org.apache.wicket.markup.html.WebMarkupContainer; import org.apache.wicket.markup.html.basic.Label; import org.apache.wicket.markup.html.form.TextField; import org.apache.wicket.markup.html.list.ListItem; import org.apache.wicket.markup.html.list.ListView; import org.apache.wicket.markup.html.panel.FeedbackPanel; import org.apache.wicket.model.AbstractReadOnlyModel; import org.apache.wicket.model.IModel; import java.io.Serializable; import java.util.Iterator; import java.util.List; /** * todo not finished [lazyman] * * @author lazyman */ public class MultiValueTextFormGroup<T extends Serializable> extends SimplePanel<List<T>> { private static final String ID_TEXT = "text"; private static final String ID_TEXT_WRAPPER = "textWrapper"; private static final String ID_LABEL = "label"; private static final String ID_FEEDBACK = "feedback"; private static final String ID_REPEATER = "repeater"; private static final String ID_ADD = "add"; private static final String ID_REMOVE = "remove"; private static final String ID_BUTTON_GROUP = "buttonGroup"; private static final String CLASS_MULTI_VALUE = "multivalue-form"; public MultiValueTextFormGroup(String id, IModel<List<T>> value, IModel<String> label, String labelSize, String textSize, boolean required) { super(id, value); setOutputMarkupId(true); initLayout(label, labelSize, textSize, required); } private void initLayout(final IModel<String> label, final String labelSize, final String textSize, final boolean required) { Label l = new Label(ID_LABEL, label); if (StringUtils.isNotEmpty(labelSize)) { l.add(AttributeAppender.prepend("class", labelSize)); } add(l); ListView repeater = new ListView<T>(ID_REPEATER, getModel()) { @Override protected void populateItem(final ListItem<T> item) { WebMarkupContainer textWrapper = new WebMarkupContainer(ID_TEXT_WRAPPER); textWrapper.add(AttributeAppender.prepend("class", new AbstractReadOnlyModel<String>() { @Override public String getObject() { StringBuilder sb = new StringBuilder(); if (StringUtils.isNotEmpty(textSize)) { sb.append(textSize).append(' '); } if (item.getIndex() > 0 && StringUtils.isNotEmpty(getOffsetClass())) { sb.append(getOffsetClass()).append(' '); sb.append(CLASS_MULTI_VALUE); } return sb.toString(); } })); item.add(textWrapper); TextField text = new TextField(ID_TEXT, createTextModel(item.getModel())); text.add(new AjaxFormComponentUpdatingBehavior("onblur") { @Override protected void onUpdate(AjaxRequestTarget target) { } }); text.setRequired(required); text.add(AttributeAppender.replace("placeholder", label)); text.setLabel(label); textWrapper.add(text); FeedbackPanel feedback = new FeedbackPanel(ID_FEEDBACK, new ComponentFeedbackMessageFilter(text)); textWrapper.add(feedback); WebMarkupContainer buttonGroup = new WebMarkupContainer(ID_BUTTON_GROUP); buttonGroup.add(AttributeAppender.append("class", new AbstractReadOnlyModel<String>() { @Override public String getObject() { if (item.getIndex() > 0 && StringUtils.isNotEmpty(labelSize)) { return CLASS_MULTI_VALUE; } return null; } })); item.add(buttonGroup); initButtons(buttonGroup, item); } }; add(repeater); } /** * @return css class for offseting other values (not first, left to the first there is a label) */ protected String getOffsetClass() { return "col-md-offset-4"; } protected IModel<String> createTextModel(final IModel<T> model) { return new IModel<String>() { @Override public String getObject() { T obj = model.getObject(); return obj != null ? obj.toString() : null; } @Override public void setObject(String object) { model.setObject((T) object); } @Override public void detach() { } }; } private void initButtons(WebMarkupContainer buttonGroup, final ListItem<T> item) { AjaxLink add = new AjaxLink(ID_ADD) { @Override public void onClick(AjaxRequestTarget target) { addValuePerformed(target, item); } }; add.add(new VisibleEnableBehaviour() { @Override public boolean isVisible() { return isAddButtonVisible(item); } }); buttonGroup.add(add); AjaxLink remove = new AjaxLink(ID_REMOVE) { @Override public void onClick(AjaxRequestTarget target) { removeValuePerformed(target, item); } }; remove.add(new VisibleEnableBehaviour() { @Override public boolean isVisible() { return isRemoveButtonVisible(item); } }); buttonGroup.add(remove); } protected boolean isAddButtonVisible(ListItem<T> item) { int size = getModelObject().size(); if (size <= 1) { return true; } if (item.getIndex() == size - 1) { return true; } return false; } protected boolean isRemoveButtonVisible(ListItem<T> item) { int size = getModelObject().size(); if (size > 1) { return true; } return false; } protected void addValuePerformed(AjaxRequestTarget target, ListItem<T> item) { List<T> objects = getModelObject(); objects.add(createNewEmptyItem()); target.add(this); } protected T createNewEmptyItem() { return null; } protected void removeValuePerformed(AjaxRequestTarget target, ListItem<T> item) { List<T> objects = getModelObject(); Iterator<T> iterator = objects.iterator(); while (iterator.hasNext()) { T object = iterator.next(); if (object.equals(item.getModelObject())) { iterator.remove(); break; } } target.add(this); } }