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package net.alantea.swing.action;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.swing.BoxLayout;
import javax.swing.DefaultListModel;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;

import net.alantea.liteprops.Property;
import net.alantea.utils.MultiMessages;

/**
 * The Class LabeledTextField.
 */
public class ActionMultipleSelector2 extends JPanel
{
   
   /** The Constant serialVersionUID. */
   private static final long serialVersionUID = 1L;
   
   private JLabel label;
   private JList list;
   
   /** The target. */
   private Object target;
   
   /** The action key. */
   private String actionKey;
   
   private Property data = new Property<>();
   
   private boolean allowNull = false;
   
    /**
     * Instantiates a new labeled text field.
     *
     * @param parent the parent
     * @param target the target
     * @param actionKey the action key
     */
    public ActionMultipleSelector2(JPanel parent, Object target, String actionKey)
    {
       super();
       this.setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));
       this.target = target;
       this.actionKey = actionKey;
       list = new JList(new DefaultListModel());
       list.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
       ListSelectionModel listSelectionModel = list.getSelectionModel();
       listSelectionModel.addListSelectionListener(this::itemStateChanged);
       add(list);
       label = new JLabel(MultiMessages.get(actionKey));
       label.setAlignmentX(JComponent.CENTER_ALIGNMENT);
       add(label);
       parent.add(this);
    }

    private void itemStateChanged(ListSelectionEvent event)
    {
       Map map = new HashMap<>();
       for (int i = 0; i < list.getModel().getSize(); i++)
       {
          boolean b = list.isSelectedIndex(i);
          T value = list.getModel().getElementAt(i);
          map.put(value, b);
       }
       ManagedSelection.trigger(actionKey, target, map);
    }

    public void setItems(List items)
    {
       if (items != null)
       {
          DefaultListModel model = (DefaultListModel) list.getModel();
          list.removeAll();
          if (allowNull)
          {
             model.addElement(null);
          }
          for(T item : items)
          {
             model.addElement(item);
          }
       }
    }
    
    public void allowNull(boolean flag)
    {
       allowNull = flag;
    }

    public Property getProperty()
    {
       return data;
    }

   public List getSelectedItems()
   {
      return list.getSelectedValuesList();
   }
}