package fr.ifremer.quadrige2.ui.swing.common.plaf;
   
   /*-
    * #%L
    * Quadrige2 Core :: Quadrige2 UI Common
    * $Id:$
    * $HeadURL:$
    * %%
    * Copyright (C) 2017 Ifremer
   * %%
   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU Affero General Public License as published by
   * the Free Software Foundation, either version 3 of the License, or
   * (at your option) any later version.
   * 
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   * 
   * You should have received a copy of the GNU Affero General Public License
   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
   * #L%
   */
  
  
  import javax.swing.*;
  import javax.swing.plaf.ComponentUI;
  import javax.swing.plaf.basic.BasicComboPopup;
  import javax.swing.plaf.basic.ComboPopup;
  import javax.swing.plaf.synth.SynthComboBoxUI;
  import java.awt.*;
  
  /**
   * a SynthComboBoxUI specific that extends list popup even when combo itself it smaller than the items width
   *
   * @author Ludovic Pecquot <ludovic.pecquot@e-is.pro>
   */
  public class WiderSynthComboBoxUI extends SynthComboBoxUI {
  
      private BasicComboPopup popup;
  
      /**
       * {@inheritDoc}
       */
      public static ComponentUI createUI(JComponent c) {
          return new WiderSynthComboBoxUI();
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      protected ComboPopup createPopup() {
          popup = new BasicComboPopup(comboBox) {
  
              @Override
              @SuppressWarnings("unchecked")
              protected void configureList() {
                  list.setFont(comboBox.getFont());
                  list.setCellRenderer(comboBox.getRenderer());
                  list.setFocusable(false);
                  list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
                  int selectedIndex = comboBox.getSelectedIndex();
                  if (selectedIndex == -1) {
                      list.clearSelection();
                  } else {
                      list.setSelectedIndex(selectedIndex);
                      list.ensureIndexIsVisible(selectedIndex);
                  }
                  installListListeners();
              }
  
              @Override
              protected Rectangle computePopupBounds(int px, int py, int pw, int ph) {
                  return super.computePopupBounds(px, py, Math.max(comboBox.getPreferredSize().width, pw), ph);
              }
  
          };
          popup.getAccessibleContext().setAccessibleParent(comboBox);
          return popup;
      }
  
      public JList getPopupList() {
          return popup.getList();
      }
  }