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- /*
- * Copyright 2000-2016 Vaadin Ltd.
- *
- * 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.vaadin.ui;
-
- import java.util.Collection;
- import java.util.Objects;
-
- import com.vaadin.data.Listing;
- import com.vaadin.server.Resource;
- import com.vaadin.server.ResourceReference;
- import com.vaadin.server.SerializablePredicate;
- import com.vaadin.server.data.DataGenerator;
- import com.vaadin.server.data.DataSource;
- import com.vaadin.shared.ui.ListingJsonConstants;
- import com.vaadin.shared.ui.optiongroup.RadioButtonGroupState;
-
- import elemental.json.JsonObject;
-
- /**
- * A group of RadioButtons. Individual radiobuttons are made from items supplied
- * by a {@link DataSource}. RadioButtons may have captions and icons.
- *
- * @param <T>
- * item type
- * @author Vaadin Ltd
- * @since 8.0
- */
- public class RadioButtonGroup<T> extends AbstractSingleSelect<T> {
-
- private IconGenerator<T> itemIconGenerator = item -> null;
-
- private ItemCaptionGenerator<T> itemCaptionGenerator = String::valueOf;
-
- private SerializablePredicate<T> itemEnabledProvider = item -> true;
-
- /**
- * Constructs a new RadioButtonGroup with caption.
- *
- * @param caption
- * caption text
- * @see Listing#setDataSource(DataSource)
- */
- public RadioButtonGroup(String caption) {
- this();
- setCaption(caption);
- }
-
- /**
- * Constructs a new RadioButtonGroup with caption and DataSource.
- *
- * @param caption
- * the caption text
- * @param dataSource
- * the data source, not null
- * @see Listing#setDataSource(DataSource)
- */
- public RadioButtonGroup(String caption, DataSource<T> dataSource) {
- this(caption);
- setDataSource(dataSource);
- }
-
- /**
- * Constructs a new RadioButtonGroup with caption and DataSource containing
- * given items.
- *
- * @param caption
- * the caption text
- * @param items
- * the data items to use, not null
- * @see Listing#setDataSource(DataSource)
- */
- public RadioButtonGroup(String caption, Collection<T> items) {
- this(caption, DataSource.create(items));
- }
-
- /**
- * Constructs a new RadioButtonGroup.
- *
- * @see Listing#setDataSource(DataSource)
- */
- public RadioButtonGroup() {
- setSelectionModel(new SimpleSingleSelection());
-
- addDataGenerator(new DataGenerator<T>() {
- @Override
- public void generateData(T data, JsonObject jsonObject) {
- String caption = getItemCaptionGenerator().apply(data);
- if (caption != null) {
- jsonObject.put(ListingJsonConstants.JSONKEY_ITEM_VALUE,
- caption);
- } else {
- jsonObject.put(ListingJsonConstants.JSONKEY_ITEM_VALUE, "");
- }
- Resource icon = getItemIconGenerator().apply(data);
- if (icon != null) {
- String iconUrl = ResourceReference
- .create(icon, RadioButtonGroup.this, null).getURL();
- jsonObject.put(ListingJsonConstants.JSONKEY_ITEM_ICON,
- iconUrl);
- }
- if (!itemEnabledProvider.test(data)) {
- jsonObject.put(ListingJsonConstants.JSONKEY_ITEM_DISABLED,
- true);
- }
-
- if (getSelectionModel().isSelected(data)) {
- jsonObject.put(ListingJsonConstants.JSONKEY_ITEM_SELECTED,
- true);
- }
- }
-
- @Override
- public void destroyData(T data) {
- }
- });
-
- }
-
- /**
- * Sets whether html is allowed in the item captions. If set to true, the
- * captions are passed to the browser as html and the developer is
- * responsible for ensuring no harmful html is used. If set to false, the
- * content is passed to the browser as plain text.
- *
- * @param htmlContentAllowed
- * true if the captions are used as html, false if used as plain
- * text
- */
- public void setHtmlContentAllowed(boolean htmlContentAllowed) {
- getState().htmlContentAllowed = htmlContentAllowed;
- }
-
- /**
- * Checks whether captions are interpreted as html or plain text.
- *
- * @return true if the captions are used as html, false if used as plain
- * text
- * @see #setHtmlContentAllowed(boolean)
- */
- public boolean isHtmlContentAllowed() {
- return getState(false).htmlContentAllowed;
- }
-
- @Override
- protected RadioButtonGroupState getState() {
- return (RadioButtonGroupState) super.getState();
- }
-
- @Override
- protected RadioButtonGroupState getState(boolean markAsDirty) {
- return (RadioButtonGroupState) super.getState(markAsDirty);
- }
-
- /**
- * Returns the item icon generator.
- *
- * @return the currently set icon generator
- * @see #setItemIconGenerator
- * @see IconGenerator
- */
- public IconGenerator<T> getItemIconGenerator() {
- return itemIconGenerator;
- }
-
- /**
- * Sets the item icon generator for this radiobutton group. The icon
- * generator is queried for each item to optionally display an icon next to
- * the item caption. If the generator returns null for an item, no icon is
- * displayed. The default generator always returns null (no icons).
- *
- * @param itemIconGenerator
- * the icon generator, not null
- * @see IconGenerator
- */
- public void setItemIconGenerator(IconGenerator<T> itemIconGenerator) {
- Objects.requireNonNull(itemIconGenerator,
- "Item icon generator cannot be null.");
- this.itemIconGenerator = itemIconGenerator;
- }
-
- /**
- * Returns the currently set item caption generator.
- *
- * @return the currently set caption generator
- * @see #setItemCaptionGenerator
- * @see ItemCaptionGenerator
- */
- public ItemCaptionGenerator<T> getItemCaptionGenerator() {
- return itemCaptionGenerator;
- }
-
- /**
- * Sets the item caption generator for this radiobutton group. The caption
- * generator is queried for each item to optionally display an item textual
- * representation. The default generator returns
- * {@code String.valueOf(item)}.
- *
- * @param itemCaptionGenerator
- * the item caption generator, not null
- * @see ItemCaptionGenerator
- */
- public void setItemCaptionGenerator(
- ItemCaptionGenerator<T> itemCaptionGenerator) {
- Objects.requireNonNull(itemCaptionGenerator,
- "Item caption generator cannot be null.");
- this.itemCaptionGenerator = itemCaptionGenerator;
- }
-
- /**
- * Returns the item enabled predicate.
- *
- * @return the item enabled predicate
- * @see #setItemEnabledProvider
- */
- public SerializablePredicate<T> getItemEnabledProvider() {
- return itemEnabledProvider;
- }
-
- /**
- * Sets the item enabled predicate for this radiobutton group. The predicate
- * is applied to each item to determine whether the item should be enabled
- * (true) or disabled (false). Disabled items are displayed as grayed out
- * and the user cannot select them. The default predicate always returns
- * true (all the items are enabled).
- *
- * @param itemEnabledProvider
- * the item enable predicate, not null
- */
- public void setItemEnabledProvider(
- SerializablePredicate<T> itemEnabledProvider) {
- Objects.requireNonNull(itemEnabledProvider);
- this.itemEnabledProvider = itemEnabledProvider;
- }
- }
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