/*
    * Copyright (c) 2004 by Cosylab d.o.o.
    *
    * The full license specifying the redistribution, modification, usage and other
    * rights and obligations is included with the distribution of this project in
    * the file license.html. If the license is not included you may find a copy at
    * http://www.cosylab.com/legal/abeans_license.htm or may write to Cosylab, d.o.o.
    *
    * THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY OF ANY KIND, NOT EVEN THE
   * IMPLIED WARRANTY OF MERCHANTABILITY. THE AUTHOR OF THIS SOFTWARE, ASSUMES
   * _NO_ RESPONSIBILITY FOR ANY CONSEQUENCE RESULTING FROM THE USE, MODIFICATION,
   * OR REDISTRIBUTION OF THIS SOFTWARE.
   */
  package com.cosylab.vdct;
  
  import java.awt.Component;
  import java.awt.GridBagConstraints;
  import java.awt.GridBagLayout;
  import java.awt.Insets;
  import java.awt.event.ActionEvent;
  import java.awt.event.ActionListener;
  import java.awt.print.PrinterJob;
  
  import javax.print.PrintService;
  import javax.swing.JButton;
  import javax.swing.JComboBox;
  import javax.swing.JDialog;
  import javax.swing.JLabel;
  import javax.swing.JPanel;
  
  /**
   * <code>PrinterSelector</code> is a dialog window that displays all available PrintServices.
   * It enables selection of a certain PrintService and its distribution to its requestor.
   *
   * @author <a href="mailto:jaka.bobnar@cosylab.com">Jaka Bobnar</a>
   * @version $Id$
   * 
   * @since VERSION
   */
  public class PrinterSelector extends JDialog implements ActionListener {
  
      private JPanel canvas;
      private JComboBox servicesCombo;
      private JLabel servicesLabel;
      private JButton okButton;
      private JButton cancelButton;
      private static final String OK_COMMAND = "Ok";
      private static final String CANCEL_COMMAND = "Cancel";
      
      private PrintService service = null;
      
      private static PrinterSelector selector = new PrinterSelector();
      
      /**
       * 
       * Return the instance of the PrinterSelector.
       * 
       * @param parent the parent component of this dialog
       * @return selector
       */
      public static PrinterSelector getPrinterSelector(Component parent) {
          selector.setLocationRelativeTo(parent);
          return selector;
      }
      
      private PrinterSelector() {
          this.setTitle("Select printer");
          this.setSize(430,120);
          this.setModal(true);
          this.setResizable(false);
          this.setContentPane(getCanvas());
      }
      
      private JPanel getCanvas() {
          if (canvas == null) {
              canvas = new JPanel();
              canvas.setLayout(new GridBagLayout());
              
              servicesLabel = new JLabel("Available printers: ");
              canvas.add(servicesLabel, new GridBagConstraints(0,0,1,1,1,0,GridBagConstraints.WEST, GridBagConstraints.BOTH, new Insets(5,5,5,5), 1,1));
              servicesCombo = new JComboBox();
              canvas.add(servicesCombo, new GridBagConstraints(1,0,3,1,0.8,0,GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(5,5,5,5), 1,1));
              
              okButton = new JButton("OK");
              canvas.add(okButton, new GridBagConstraints(2,1,1,1,1,0,GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(5,5,5,5), 1,1));
              okButton.addActionListener(this);
              okButton.setActionCommand(OK_COMMAND);
              cancelButton = new JButton("Cancel");
              canvas.add(cancelButton, new GridBagConstraints(3,1,1,1,1,0,GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(5,5,5,5), 1,1));
              cancelButton.addActionListener(this);
              cancelButton.setActionCommand(CANCEL_COMMAND);
              
          }
          return canvas;
      }
      
      /**
       * 
       * Shows the PrinterSelector and return the selected PrintService if SAVE button is pressed.
      * If the SKIP button is pressed method returns null.
      * @param previousService previousService
      * @return selected PrintService.
      */
     public PrintService getPrintService(PrintService previousService) {
         refresh(previousService);
         this.setVisible(true);
         return service;
     }
     
     /*
      *  (non-Javadoc)
      * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
      */
     public void actionPerformed(ActionEvent e) {
         String command = e.getActionCommand();
         if (command.equals(CANCEL_COMMAND)) {
             service = null;
             this.dispose();
         } else if (command.equals(OK_COMMAND)) {
             service = (PrintService) servicesCombo.getSelectedItem();
             this.dispose();
         }
     }
     
     private void refresh(PrintService previousService) {
         service = null;
         servicesCombo.removeAllItems();
         PrintService[] ps = PrinterJob.lookupPrintServices();
         for (int i = 0; i < ps.length; i++) {
             servicesCombo.addItem(ps[i]);
         }
         if (previousService != null) {
             servicesCombo.setSelectedItem(previousService);
         }
         
     }
 }