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.Image;
   5 import java.awt.KeyboardFocusManager;
   6 import java.awt.Window;
   7 import java.awt.event.ActionEvent;
   8 import java.awt.event.KeyEvent;
   9 import java.awt.event.WindowEvent;
  10 import java.io.IOException;
  11 import java.io.InputStream;
  12 import java.util.ArrayList;
  13 import java.util.Arrays;
  14 import java.util.HashSet;
  15 import java.util.List;
  16 import java.util.Set;
  17
  18 import javax.imageio.ImageIO;
  19 import javax.swing.AbstractAction;
  20 import javax.swing.Action;
  21 import javax.swing.JButton;
  22 import javax.swing.JComponent;
  23 import javax.swing.JDialog;
  24 import javax.swing.JRootPane;
  25 import javax.swing.KeyStroke;
  26 import javax.swing.RootPaneContainer;
  27 import javax.swing.SwingUtilities;
  28
  29 public class GUIUtil {
  30
  31         private static final KeyStroke ESCAPE = KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0);
  32         private static final String CLOSE_ACTION_KEY =  "escape:WINDOW_CLOSING";
  33
  34     private static final List<Image> images = new ArrayList<Image>();
  35     static {
  36         loadImage("pix/icon/icon-256.png");
  37         loadImage("pix/icon/icon-064.png");
  38         loadImage("pix/icon/icon-048.png");
  39         loadImage("pix/icon/icon-032.png");
  40         loadImage("pix/icon/icon-016.png");
  41     }
  42
  43     private static void loadImage(String file) {
  44         InputStream is;
  45
  46         is = ClassLoader.getSystemResourceAsStream(file);
  47         if (is == null)
  48                 return;
  49
  50         try {
  51                 Image image = ImageIO.read(is);
  52                 images.add(image);
  53         } catch (IOException ignore) {
  54                 ignore.printStackTrace();
  55         }
  56     }
  57
  58
  59
  60
  61         /**
  62          * Add the correct action to close a JDialog when the ESC key is pressed.
  63          * The dialog is closed by sending is a WINDOW_CLOSING event.
  64          *
  65          * @param dialog        the dialog for which to install the action.
  66          */
  67         public static void installEscapeCloseOperation(final JDialog dialog) {
  68             Action dispatchClosing = new AbstractAction() {
  69                 public void actionPerformed(ActionEvent event) {
  70                     dialog.dispatchEvent(new WindowEvent(dialog, WindowEvent.WINDOW_CLOSING));
  71                 }
  72             };
  73             JRootPane root = dialog.getRootPane();
  74             root.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(ESCAPE, CLOSE_ACTION_KEY);
  75             root.getActionMap().put(CLOSE_ACTION_KEY, dispatchClosing);
  76         }
  77
  78
  79         /**
  80          * Set the given button as the default button of the frame/dialog it is in.  The button
  81          * must be first attached to the window component hierarchy.
  82          *
  83          * @param button        the button to set as the default button.
  84          */
  85         public static void setDefaultButton(JButton button) {
  86                 Window w = SwingUtilities.windowForComponent(button);
  87                 if (w == null) {
  88                         throw new IllegalArgumentException("Attach button to a window first.");
  89                 }
  90                 if (!(w instanceof RootPaneContainer)) {
  91                         throw new IllegalArgumentException("Button not attached to RootPaneContainer, w="+w);
  92                 }
  93                 ((RootPaneContainer)w).getRootPane().setDefaultButton(button);
  94         }
  95
  96
  97
  98         /**
  99          * Change the behavior of a component so that TAB and Shift-TAB cycles the focus of
 100          * the components.  This is necessary for e.g. <code>JTextArea</code>.
 101          *
 102          * @param c             the component to modify
 103          */
 104     public static void setTabToFocusing(Component c) {
 105         Set<KeyStroke> strokes = new HashSet<KeyStroke>(Arrays.asList(KeyStroke.getKeyStroke("pressed TAB")));
 106         c.setFocusTraversalKeys(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, strokes);
 107         strokes = new HashSet<KeyStroke>(Arrays.asList(KeyStroke.getKeyStroke("shift pressed TAB")));
 108         c.setFocusTraversalKeys(KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, strokes);
 109     }
 110
 111
 112     public static void setWindowIcons(Window window) {
 113         window.setIconImages(images);
 114     }
 115
 116 }