git.gag.com Git - debian/openrocket/blob - src/net/sf/openrocket/gui/components/URLLabel.java

   1 package net.sf.openrocket.gui.components;
   2
   3 import java.awt.Color;
   4 import java.awt.Cursor;
   5 import java.awt.Desktop;
   6 import java.awt.event.MouseAdapter;
   7 import java.awt.event.MouseEvent;
   8 import java.awt.font.TextAttribute;
   9 import java.io.IOException;
  10 import java.net.URI;
  11 import java.net.URISyntaxException;
  12 import java.util.HashMap;
  13 import java.util.Map;
  14
  15 /**
  16  * A label of a URL that is clickable.  Clicking the URL will launch the URL in
  17  * the default browser if the Desktop class is supported.
  18  *
  19  * @author Sampo Niskanen <sampo.niskanen@iki.fi>
  20  */
  21 public class URLLabel extends SelectableLabel {
  22
  23         /**
  24          * Create a label showing the url it will direct to.
  25          *
  26          * @param url   the URL.
  27          */
  28         public URLLabel(String url) {
  29                 this(url, url);
  30         }
  31
  32         /**
  33          * Create a label with separate URL and label.
  34          *
  35          * @param url   the URL clicking will open.
  36          * @param label the label.
  37          */
  38         public URLLabel(final String url, String label) {
  39                 super();
  40
  41                 setText(label);
  42
  43                 if (Desktop.isDesktopSupported()) {
  44
  45                         // Blue, underlined font
  46                         Map<TextAttribute, Object> map = new HashMap<TextAttribute, Object>();
  47                         map.put(TextAttribute.UNDERLINE, TextAttribute.UNDERLINE_ON);
  48                         this.setFont(this.getFont().deriveFont(map));
  49                         this.setForeground(Color.BLUE);
  50
  51                         this.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
  52
  53
  54                         this.addMouseListener(new MouseAdapter() {
  55                                 @Override
  56                                 public void mouseClicked(MouseEvent e) {
  57                                         Desktop d = Desktop.getDesktop();
  58                                         try {
  59                                                 d.browse(new URI(url));
  60                                         } catch (URISyntaxException e1) {
  61                                                 throw new RuntimeException("BUG: Illegal URL: " + url, e1);
  62                                         } catch (IOException e1) {
  63                                                 System.err.println("Unable to launch browser:");
  64                                                 e1.printStackTrace();
  65                                         }
  66                                 }
  67                         });
  68
  69                 }
  70         }
  71 }