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.panels;
  
  import org.apache.wicket.Component;
  import org.apache.wicket.ajax.AjaxRequestTarget;
  import org.apache.wicket.ajax.markup.html.form.AjaxButton;
  import org.apache.wicket.model.IModel;
  import org.apache.wicket.util.string.AppendingStringBuffer;
  
  import org.apache.causeway.core.metamodel.object.ManagedObject;
  import org.apache.causeway.viewer.wicket.ui.components.widgets.formcomponent.FormFeedbackPanel;
  import org.apache.causeway.viewer.wicket.ui.errors.JGrowlBehaviour;
  import org.apache.causeway.viewer.wicket.ui.util.Wkt;
  
  /**
   * Form with <i>Feedback</i> panel and <i>Ok/Cancel</i> buttons.
   */
  public abstract class OkCancelForm<T extends IModel<ManagedObject>>
  extends FormAbstract<ManagedObject>{
  
      private static final long serialVersionUID = 1L;
      private static final String ID_OK_BUTTON = "okButton";
      public  static final String ID_CANCEL_BUTTON = "cancelButton";
      private static final String ID_FEEDBACK = "feedback";
  
      protected final AjaxButton okButton;
      protected final AjaxButton cancelButton;
  
      protected OkCancelForm(final String id, final IModel<ManagedObject> model) {
          super(id, model);
          okButton = Wkt.buttonAddOk(this, ID_OK_BUTTON, ()->translate("OK"), getWicketViewerSettings(), this::onOkSubmitted);
          cancelButton = Wkt.buttonAdd(this, ID_CANCEL_BUTTON, ()->translate("Cancel"), (button, target)->{
              onCancelSubmitted(target);
          });
          configureOkButton(okButton);
          configureCancelButton(cancelButton);
          setDefaultButton(okButton);
          Wkt.add(this, new FormFeedbackPanel(ID_FEEDBACK));
          setOutputMarkupId(true);
      }
  
      protected abstract void onOkSubmitted(AjaxButton okButton, AjaxRequestTarget target);
      protected abstract void onCancelSubmitted(AjaxRequestTarget target);
  
      protected void configureOkButton(final AjaxButton okButton) {
          okButton.add(new JGrowlBehaviour());
      }
  
      protected void configureCancelButton(final AjaxButton cancelButton) {
          // so can submit with invalid content (eg mandatory params missing)
          cancelButton.setDefaultFormProcessing(false);
      }
  
      // workaround for https://issues.apache.org/jira/browse/WICKET-6364
      @Override
      protected final void appendDefaultButtonField() {
          AppendingStringBuffer buffer = new AppendingStringBuffer();
          buffer.append(
                  "<div style=\"width:0px;height:0px;position:absolute;left:-100px;top:-100px;overflow:hidden\">");
          buffer.append("<input type=\"text\" tabindex=\"-1\" autocomplete=\"off\"/>");
          Component submittingComponent = this.defaultSubmittingComponent();
          buffer.append("<input type=\"submit\" tabindex=\"-1\" name=\"");
          buffer.append(this.defaultSubmittingComponent().getInputName());
          buffer.append("\" onclick=\" var b=document.getElementById(\'");
          buffer.append(submittingComponent.getMarkupId());
          buffer.append("\'); if (b!=null&amp;&amp;b.onclick!=null&amp;&amp;typeof(b.onclick) != \'undefined\') {  "
                  + "var r = Wicket.bind(b.onclick, b)(); if (r != false) b.click(); } else { b.click(); };  return false;\" ");
          buffer.append(" />");
          buffer.append("</div>");
          this.getResponse().write(buffer);
      }
  
      // -- HELPER
  
      private AjaxButton defaultSubmittingComponent() {
          return okButton;
      }
  
  }
  