content: /*
   *  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 org.apache.causeway.viewer.wicket.ui.components.attributes.choices;
  
  import java.io.Serializable;
  
  import org.apache.wicket.ajax.AjaxRequestTarget;
  import org.apache.wicket.markup.html.WebMarkupContainer;
  import org.jspecify.annotations.NonNull;
  import org.jspecify.annotations.Nullable;
  
  import org.apache.causeway.core.metamodel.object.ManagedObject;
  import org.apache.causeway.viewer.commons.model.attrib.UiParameter;
  import org.apache.causeway.viewer.commons.model.components.UiString;
  import org.apache.causeway.viewer.wicket.model.models.UiAttributeWkt;
  import org.apache.causeway.viewer.wicket.ui.components.attributes.AttributePanelWithFormField;
  import org.apache.causeway.viewer.wicket.ui.components.widgets.select2.Select2;
  import org.apache.causeway.viewer.wicket.ui.util.Wkt;
  import org.apache.causeway.viewer.wicket.ui.util.Wkt.EventTopic;
  
  public abstract class AttributePanelWithSelect
  extends AttributePanelWithFormField<ManagedObject> {
  
      private static final long serialVersionUID = 1L;
  
      public static interface ChoiceTitleHandler extends Serializable {
          void clearTitleAttribute();
          void setTitleAttribute(@Nullable String titleAttribute);
      }
  
      protected Select2 select2;
  
      protected AttributePanelWithSelect(
              final String id,
              final UiAttributeWkt attributeModel) {
          super(id, attributeModel, ManagedObject.class);
          setOutputMarkupId(true);
      }
  
      protected final void createSelect2(final String id) {
          this.select2 = Select2.create(id, attributeModel(),
                  getAttributeModelChangeDispatcher());
      }
  
      // -- CUSTOM UPDATING BEHAVIOR
  
      @Override
      protected final void installModelChangeBehavior() {
          /* no-op, as we already have the Select2OnSelect behavior
           * (directly) installed with the Select2 form component
           */
      }
  
      protected final boolean isEditable() {
          var attributeModel = attributeModel();
          // cannot edit if in table or is view-mode
          return !attributeModel.getRenderingHint().isInTable()
                  && !attributeModel.isViewingMode();
      }
  
      protected final boolean hasAnyChoices() {
          return attributeModel().getChoiceProviderSort().isChoicesAny();
      }
  
      public final boolean checkSelect2Required() {
          return select2.checkRequired();
      }
  
      @Override
      protected final UiString obtainOutputFormat() {
          return UiString.text(select2.obtainOutputFormatModel().getObject());
      }
  
      /**
       * Automatically "opens" the select2.
       */
      @Override
      protected final void onSwitchFormForInlinePrompt(
              final WebMarkupContainer inlinePromptForm,
              final AjaxRequestTarget target) {
          Wkt.javaScriptAdd(target, EventTopic.OPEN_SELECT2, inlinePromptForm.getMarkupId());
      }
  
      /**
       * Refresh choices when changing.
       * <p>
       * called from onUpdate callback
       */
      @Override
      public final Repaint updateIfNecessary(final @NonNull UiParameter paramModel) {
          return super.updateIfNecessary(paramModel)
                  .max(Repaint.required(this.select2!=null));
      }
  
  }
  