git.gag.com Git - debian/openrocket/blob - src/net/sf/openrocket/util/GUIUtil.java

   1 package net.sf.openrocket.util;
   2
   3 import java.awt.Component;
   4 import java.awt.KeyboardFocusManager;
   5 import java.awt.Window;
   6 import java.awt.event.ActionEvent;
   7 import java.awt.event.KeyEvent;
   8 import java.awt.event.WindowEvent;
   9 import java.util.Arrays;
  10 import java.util.HashSet;
  11 import java.util.Set;
  12
  13 import javax.swing.AbstractAction;
  14 import javax.swing.Action;
  15 import javax.swing.JButton;
  16 import javax.swing.JComponent;
  17 import javax.swing.JDialog;
  18 import javax.swing.JRootPane;
  19 import javax.swing.KeyStroke;
  20 import javax.swing.RootPaneContainer;
  21 import javax.swing.SwingUtilities;
  22
  23 public class GUIUtil {
  24
  25         private static final KeyStroke ESCAPE = KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0);
  26         private static final String CLOSE_ACTION_KEY =  "escape:WINDOW_CLOSING";
  27
  28
  29         /**
  30          * Add the correct action to close a JDialog when the ESC key is pressed.
  31          * The dialog is closed by sending is a WINDOW_CLOSING event.
  32          *
  33          * @param dialog        the dialog for which to install the action.
  34          */
  35         public static void installEscapeCloseOperation(final JDialog dialog) {
  36             Action dispatchClosing = new AbstractAction() {
  37                 public void actionPerformed(ActionEvent event) {
  38                     dialog.dispatchEvent(new WindowEvent(dialog, WindowEvent.WINDOW_CLOSING));
  39                 }
  40             };
  41             JRootPane root = dialog.getRootPane();
  42             root.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(ESCAPE, CLOSE_ACTION_KEY);
  43             root.getActionMap().put(CLOSE_ACTION_KEY, dispatchClosing);
  44         }
  45
  46
  47         /**
  48          * Set the given button as the default button of the frame/dialog it is in.  The button
  49          * must be first attached to the window component hierarchy.
  50          *
  51          * @param button        the button to set as the default button.
  52          */
  53         public static void setDefaultButton(JButton button) {
  54                 Window w = SwingUtilities.windowForComponent(button);
  55                 if (w == null) {
  56                         throw new IllegalArgumentException("Attach button to a window first.");
  57                 }
  58                 if (!(w instanceof RootPaneContainer)) {
  59                         throw new IllegalArgumentException("Button not attached to RootPaneContainer, w="+w);
  60                 }
  61                 ((RootPaneContainer)w).getRootPane().setDefaultButton(button);
  62         }
  63
  64
  65
  66         /**
  67          * Change the behavior of a component so that TAB and Shift-TAB cycles the focus of
  68          * the components.  This is necessary for e.g. <code>JTextArea</code>.
  69          *
  70          * @param c             the component to modify
  71          */
  72     public static void setTabToFocusing(Component c) {
  73         Set<KeyStroke> strokes = new HashSet<KeyStroke>(Arrays.asList(KeyStroke.getKeyStroke("pressed TAB")));
  74         c.setFocusTraversalKeys(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, strokes);
  75         strokes = new HashSet<KeyStroke>(Arrays.asList(KeyStroke.getKeyStroke("shift pressed TAB")));
  76         c.setFocusTraversalKeys(KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, strokes);
  77     }
  78
  79
  80 }