EDIT

/**

* Copyright (C) 2017 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.vaadin.component;

import org.vaadin.viritin.fields.LazyComboBox;

import org.vaadin.viritin.fields.LazyComboBox.FilterableCountProvider;

import org.vaadin.viritin.fields.LazyComboBox.FilterablePagingProvider;

import com.vaadin.data.Property;

import com.vaadin.data.fieldgroup.FieldGroup;

import com.vaadin.data.util.converter.Converter.ConversionException;

import com.vaadin.server.FontAwesome;

import com.vaadin.ui.Button;

import com.vaadin.ui.Button.ClickListener;

import com.vaadin.ui.Component;

import com.vaadin.ui.CssLayout;

import com.vaadin.ui.themes.ValoTheme;

/**

 * @author a.kohlbecker

 * @since May 24, 2017

 *

 */

public class ToOneRelatedEntityCombobox<V extends Object> extends CompositeCustomField<V> implements ToOneRelatedEntityField<V> {

    private static final long serialVersionUID = 6277565876657520311L;

    public static final String PRIMARY_STYLE = "v-related-entity-combobox";

    private Class<V> type;

    private CssLayout container = new CssLayout();

    private LazyComboBox<V> lazySelect;

    private Button addButton = new Button(FontAwesome.PLUS);

    private Button editButton  = new Button(FontAwesome.EDIT);

    public ToOneRelatedEntityCombobox(String caption, Class<V> type){

        this.type = type;

        setCaption(caption);

        lazySelect = new LazyComboBox<V>(type);

        addStyledComponents(lazySelect, addButton, editButton);

        addSizedComponents(lazySelect, container);

        lazySelect.addValueChangeListener(e -> {

            // update the itemContainer immediately so that the edit button acts on the chosen item

            lazySelect.commit();

        });

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected Component initContent() {

        container.addComponents(lazySelect, addButton, editButton);

        setPrimaryStyleName(PRIMARY_STYLE);

        addDefaultStyles();

        return container;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public Class<? extends V> getType() {

        return type;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void addDefaultStyles() {

        container.addStyleName(ValoTheme.LAYOUT_COMPONENT_GROUP);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public FieldGroup getFieldGroup() {

        return null;

    }

    /**

     * @return the select

     */

    public LazyComboBox<V> getSelect() {

        return lazySelect;

    }

    /**

     * {@inheritDoc}

     */

    public void loadFrom(FilterablePagingProvider<V> filterablePagingProvider, FilterableCountProvider filterableCountProvider, int pageLength) {

        lazySelect.loadFrom(filterablePagingProvider, filterableCountProvider, pageLength);

    }

    /**

     * reload the selected entity from the persistent storage

     */

    public void reload() {

        getSelect().refresh();

        getSelect().discard(); // reload from data source

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void setAddButtonEnabled(boolean enabled) {

        addButton.setEnabled(enabled);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void addClickListenerAddEntity(ClickListener listener) {

        addButton.addClickListener(listener);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void setEditButtonEnabled(boolean enabled) {

        editButton.setEnabled(enabled);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void addClickListenerEditEntity(ClickListener listener) {

        editButton.addClickListener(listener);

    }

    @Override

    public void selectNewItem(V bean){

        lazySelect.refresh();

        lazySelect.setValue(bean);

        lazySelect.markAsDirty();

    }

    /**

     * Returns always currently selected item by

     *

     * {@inheritDoc}

     */

    @Override

    public V getValue() {

        lazySelect.commit();

        return lazySelect.getValue();

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void setValue(V newFieldValue) throws com.vaadin.data.Property.ReadOnlyException, ConversionException {

        lazySelect.refresh();

        lazySelect.setValue(newFieldValue);

        lazySelect.markAsDirty();

    }

    @Override

    public void setPropertyDataSource(Property newDataSource) {

        lazySelect.setPropertyDataSource(newDataSource);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public Property getPropertyDataSource() {

        return lazySelect.getPropertyDataSource();

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void setReadOnly(boolean readOnly) {

        super.setReadOnly(readOnly);

        setDeepReadOnly(readOnly, getContent());

    }

}