lib/classpath/examples/gnu/classpath/examples/swing/ComboBoxDemo.java

   1 /* ComboBoxDemo.java -- An example showing various combo boxes in Swing.
   2    Copyright (C) 2005, 2006,  Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath examples.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301 USA.
  20 */
  21
  22
  23 package gnu.classpath.examples.swing;
  24
  25 import java.awt.BorderLayout;
  26 import java.awt.Color;
  27 import java.awt.Component;
  28 import java.awt.Dimension;
  29 import java.awt.Font;
  30 import java.awt.GridLayout;
  31 import java.awt.event.ActionEvent;
  32 import java.awt.event.ActionListener;
  33
  34 import javax.swing.BorderFactory;
  35 import javax.swing.DefaultListCellRenderer;
  36 import javax.swing.Icon;
  37 import javax.swing.JButton;
  38 import javax.swing.JCheckBox;
  39 import javax.swing.JComboBox;
  40 import javax.swing.JComponent;
  41 import javax.swing.JFrame;
  42 import javax.swing.JList;
  43 import javax.swing.JPanel;
  44 import javax.swing.SwingUtilities;
  45 import javax.swing.plaf.metal.MetalIconFactory;
  46
  47 /**
  48  * A simple demo showing various combo boxes in different states.
  49  */
  50 public class ComboBoxDemo
  51   extends JPanel
  52   implements ActionListener
  53 {
  54
  55   class CustomCellRenderer extends DefaultListCellRenderer
  56   {
  57     public Component getListCellRendererComponent(JList list,
  58                                               Object value,
  59                                               int index,
  60                                               boolean isSelected,
  61                                               boolean cellHasFocus)
  62     {
  63       DefaultListCellRenderer result = (DefaultListCellRenderer)
  64           super.getListCellRendererComponent(list, value, index, isSelected,
  65           cellHasFocus);
  66       Icon icon = (Icon) value;
  67       result.setIcon(icon);
  68       result.setText("Index = " + index);
  69       return result;
  70     }
  71   }
  72
  73   private JCheckBox comboState1;
  74   private JComboBox combo1;
  75   private JComboBox combo2;
  76
  77   private JCheckBox comboState2;
  78   private JComboBox combo3;
  79   private JComboBox combo4;
  80
  81   private JCheckBox comboState3;
  82   private JComboBox combo5;
  83   private JComboBox combo6;
  84
  85   private JCheckBox comboState4;
  86   private JComboBox combo7;
  87   private JComboBox combo8;
  88
  89   private JCheckBox comboState5;
  90   private JComboBox combo9;
  91   private JComboBox combo10;
  92
  93   private JCheckBox comboState6;
  94   private JComboBox combo11;
  95   private JComboBox combo12;
  96
  97   /**
  98    * Creates a new demo instance.
  99    */
 100   public ComboBoxDemo()
 101   {
 102     super();
 103     createContent();
 104   }
 105
 106   /**
 107    * When the demo is run independently, the frame is displayed, so we should
 108    * initialise the content panel (including the demo content and a close
 109    * button).  But when the demo is run as part of the Swing activity board,
 110    * only the demo content panel is used, the frame itself is never displayed,
 111    * so we can avoid this step.
 112    */
 113   void initFrameContent()
 114   {
 115     JPanel closePanel = new JPanel();
 116     JButton closeButton = new JButton("Close");
 117     closeButton.setActionCommand("CLOSE");
 118     closeButton.addActionListener(this);
 119     closePanel.add(closeButton);
 120     add(closePanel, BorderLayout.SOUTH);
 121   }
 122
 123   /**
 124    * Returns a panel with the demo content.  The panel
 125    * uses a BorderLayout(), and the BorderLayout.SOUTH area
 126    * is empty, to allow callers to add controls to the
 127    * bottom of the panel if they want to (a close button is
 128    * added if this demo is being run as a standalone demo).
 129    */
 130   private void createContent()
 131   {
 132     setLayout(new BorderLayout());
 133     JPanel panel = new JPanel(new GridLayout(6, 1));
 134     panel.add(createPanel1());
 135     panel.add(createPanel2());
 136     panel.add(createPanel3());
 137     panel.add(createPanel4());
 138     panel.add(createPanel5());
 139     panel.add(createPanel6());
 140     add(panel);
 141   }
 142
 143   private JPanel createPanel1()
 144   {
 145     JPanel panel = new JPanel(new BorderLayout());
 146     this.comboState1 = new JCheckBox("Enabled", true);
 147     this.comboState1.setActionCommand("COMBO_STATE1");
 148     this.comboState1.addActionListener(this);
 149     panel.add(this.comboState1, BorderLayout.EAST);
 150
 151     JPanel controlPanel = new JPanel();
 152     controlPanel.setBorder(BorderFactory.createTitledBorder("Regular: "));
 153     this.combo1 = new JComboBox(new Object[] {"Australia", "New Zealand",
 154             "England"});
 155
 156     this.combo2 = new JComboBox(new Object[] {"Australia", "New Zealand",
 157             "England"});
 158     this.combo2.setEditable(true);
 159
 160     controlPanel.add(combo1);
 161     controlPanel.add(combo2);
 162
 163     panel.add(controlPanel);
 164
 165     return panel;
 166   }
 167
 168   private JPanel createPanel2()
 169   {
 170     JPanel panel = new JPanel(new BorderLayout());
 171     this.comboState2 = new JCheckBox("Enabled", true);
 172     this.comboState2.setActionCommand("COMBO_STATE2");
 173     this.comboState2.addActionListener(this);
 174     panel.add(this.comboState2, BorderLayout.EAST);
 175
 176     JPanel controlPanel = new JPanel();
 177     controlPanel.setBorder(BorderFactory.createTitledBorder("Large Font: "));
 178     this.combo3 = new JComboBox(new Object[] {"Australia", "New Zealand",
 179             "England"});
 180     this.combo3.setFont(new Font("Dialog", Font.PLAIN, 20));
 181
 182     this.combo4 = new JComboBox(new Object[] {"Australia", "New Zealand",
 183             "England"});
 184     this.combo4.setEditable(true);
 185     this.combo4.setFont(new Font("Dialog", Font.PLAIN, 20));
 186
 187     controlPanel.add(combo3);
 188     controlPanel.add(combo4);
 189
 190     panel.add(controlPanel);
 191
 192     return panel;
 193   }
 194
 195   private JPanel createPanel3()
 196   {
 197     JPanel panel = new JPanel(new BorderLayout());
 198     this.comboState3 = new JCheckBox("Enabled", true);
 199     this.comboState3.setActionCommand("COMBO_STATE3");
 200     this.comboState3.addActionListener(this);
 201     panel.add(this.comboState3, BorderLayout.EAST);
 202
 203     JPanel controlPanel = new JPanel();
 204     controlPanel.setBorder(BorderFactory.createTitledBorder("Colored Background: "));
 205     this.combo5 = new JComboBox(new Object[] {"Australia", "New Zealand",
 206             "England"});
 207     this.combo5.setBackground(Color.yellow);
 208
 209     this.combo6 = new JComboBox(new Object[] {"Australia", "New Zealand",
 210             "England"});
 211     this.combo6.setEditable(true);
 212     this.combo6.setBackground(Color.yellow);
 213
 214     controlPanel.add(combo5);
 215     controlPanel.add(combo6);
 216
 217     panel.add(controlPanel);
 218
 219     return panel;
 220   }
 221
 222   /**
 223    * This panel contains combo boxes that are empty.
 224    *
 225    * @return A panel.
 226    */
 227   private JPanel createPanel4()
 228   {
 229     JPanel panel = new JPanel(new BorderLayout());
 230     this.comboState4 = new JCheckBox("Enabled", true);
 231     this.comboState4.setActionCommand("COMBO_STATE4");
 232     this.comboState4.addActionListener(this);
 233     panel.add(this.comboState4, BorderLayout.EAST);
 234
 235     JPanel controlPanel = new JPanel();
 236     controlPanel.setBorder(BorderFactory.createTitledBorder("Empty: "));
 237     this.combo7 = new JComboBox();
 238     this.combo8 = new JComboBox();
 239     this.combo8.setEditable(true);
 240
 241     controlPanel.add(combo7);
 242     controlPanel.add(combo8);
 243
 244     panel.add(controlPanel);
 245
 246     return panel;
 247   }
 248
 249   /**
 250    * This panel contains combo boxes that are narrow but contain long text
 251    * items.
 252    *
 253    * @return A panel.
 254    */
 255   private JPanel createPanel5()
 256   {
 257     JPanel panel = new JPanel(new BorderLayout());
 258     this.comboState5 = new JCheckBox("Enabled", true);
 259     this.comboState5.setActionCommand("COMBO_STATE5");
 260     this.comboState5.addActionListener(this);
 261     panel.add(this.comboState5, BorderLayout.EAST);
 262
 263     JPanel controlPanel = new JPanel();
 264     controlPanel.setBorder(BorderFactory.createTitledBorder("Narrow: "));
 265     this.combo9 = new JComboBox(new Object[] {
 266             "A really long item that will be truncated when displayed"});
 267     this.combo9.setPreferredSize(new Dimension(100, 30));
 268     this.combo10 = new JComboBox(new Object[] {
 269             "A really long item that will be truncated when displayed"});
 270     this.combo10.setPreferredSize(new Dimension(100, 30));
 271     this.combo10.setEditable(true);
 272
 273     controlPanel.add(combo9);
 274     controlPanel.add(combo10);
 275
 276     panel.add(controlPanel);
 277
 278     return panel;
 279   }
 280
 281   /**
 282    * This panel contains combo boxes with a custom renderer.
 283    *
 284    * @return A panel.
 285    */
 286   private JPanel createPanel6()
 287   {
 288     JPanel panel = new JPanel(new BorderLayout());
 289     this.comboState6 = new JCheckBox("Enabled", true);
 290     this.comboState6.setActionCommand("COMBO_STATE6");
 291     this.comboState6.addActionListener(this);
 292     panel.add(this.comboState6, BorderLayout.EAST);
 293
 294     JPanel controlPanel = new JPanel();
 295     controlPanel.setBorder(BorderFactory.createTitledBorder("Custom Renderer: "));
 296     this.combo11 = new JComboBox(new Object[] {
 297             MetalIconFactory.getFileChooserHomeFolderIcon(),
 298             MetalIconFactory.getFileChooserNewFolderIcon()});
 299     this.combo11.setPreferredSize(new Dimension(100, 30));
 300     this.combo11.setRenderer(new CustomCellRenderer());
 301     this.combo12 = new JComboBox(new Object[] {
 302             MetalIconFactory.getFileChooserHomeFolderIcon(),
 303             MetalIconFactory.getFileChooserNewFolderIcon()});
 304     this.combo12.setPreferredSize(new Dimension(100, 30));
 305     this.combo12.setRenderer(new CustomCellRenderer());
 306     this.combo12.setEditable(true);
 307
 308     controlPanel.add(combo11);
 309     controlPanel.add(combo12);
 310
 311     panel.add(controlPanel);
 312
 313     return panel;
 314   }
 315
 316   public void actionPerformed(ActionEvent e)
 317   {
 318     if (e.getActionCommand().equals("COMBO_STATE1"))
 319     {
 320       combo1.setEnabled(comboState1.isSelected());
 321       combo2.setEnabled(comboState1.isSelected());
 322     }
 323     else if (e.getActionCommand().equals("COMBO_STATE2"))
 324     {
 325       combo3.setEnabled(comboState2.isSelected());
 326       combo4.setEnabled(comboState2.isSelected());
 327     }
 328     else if (e.getActionCommand().equals("COMBO_STATE3"))
 329     {
 330       combo5.setEnabled(comboState3.isSelected());
 331       combo6.setEnabled(comboState3.isSelected());
 332     }
 333     else if (e.getActionCommand().equals("COMBO_STATE4"))
 334     {
 335       combo7.setEnabled(comboState4.isSelected());
 336       combo8.setEnabled(comboState4.isSelected());
 337     }
 338     else if (e.getActionCommand().equals("COMBO_STATE5"))
 339     {
 340       combo9.setEnabled(comboState5.isSelected());
 341       combo10.setEnabled(comboState5.isSelected());
 342     }
 343     else if (e.getActionCommand().equals("COMBO_STATE6"))
 344     {
 345       combo11.setEnabled(comboState6.isSelected());
 346       combo12.setEnabled(comboState6.isSelected());
 347     }
 348     else if (e.getActionCommand().equals("CLOSE"))
 349     {
 350       System.exit(0);
 351     }
 352   }
 353
 354   public static void main(String[] args)
 355   {
 356     SwingUtilities.invokeLater
 357     (new Runnable()
 358      {
 359        public void run()
 360        {
 361          ComboBoxDemo app = new ComboBoxDemo();
 362          app.initFrameContent();
 363          JFrame frame = new JFrame();
 364          frame.getContentPane().add(app);
 365          frame.pack();
 366          frame.setVisible(true);
 367        }
 368      });
 369   }
 370
 371   /**
 372    * Returns a DemoFactory that creates a ComboBoxDemo.
 373    *
 374    * @return a DemoFactory that creates a ComboBoxDemo
 375    */
 376   public static DemoFactory createDemoFactory()
 377   {
 378     return new DemoFactory()
 379     {
 380       public JComponent createDemo()
 381       {
 382         return new ComboBoxDemo();
 383       }
 384     };
 385   }
 386 }