Developing GNOME Applications with Java

Listing 6. ExampleGNOME.glade Fragment

<?xml version="1.0" standalone="no"?>
<!DOCTYPE glade-interface SYSTEM
 "http://glade.gnome.org/glade-2.0.dtd">

<glade-interface>
<requires lib="gnome"/>

<widget class="GtkWindow" id="ExampleGNOME">
 <property name="visible">True</property>
 <property name="title" translatable="yes">
  GNOME</property>
 <property name="type">
  GTK_WINDOW_TOPLEVEL</property>
 <property name="window_position">
  GTK_WIN_POS_NONE</property>
 <property name="modal">False</property>
 <property name="resizable">True</property>
 <property name="destroy_with_parent">
  False</property>
 <property name="decorated">True</property>
 <property name="skip_taskbar_hint">
  False</property>
 <property name="skip_pager_hint">False</property>
 <property name="type_hint">
  GDK_WINDOW_TYPE_HINT_NORMAL</property>
 <property name="gravity">
  GDK_GRAVITY_NORTH_WEST</property>

 <child>
  <widget class="GtkVBox" id="vbox1">
   <property name="visible">True</property>
   <property name="homogeneous">False</property>
   <property name="spacing">0</property>

...

   <child>
    <widget class="GtkHBox" id="hbox1">
     <property name="visible">True</property>
     <property name="homogeneous">False</property>
     <property name="spacing">0</property>

     <child>
      <widget class="GtkButton" id="yesButton">
       <property name="visible"> True</property>
       <property name="can_focus">True</property>
       <property name="label">gtk-yes</property>
       <property name="use_stock">True</property>
       <property name="relief">
        GTK_RELIEF_NORMAL</property>
       <property name="focus_on_click">
        True</property>
       <signal name="released"
        handler="on_yesButton_released"
        last_modification_time=
        "Sun, 21 Nov 2004 19:10:01 GMT"/>
      </widget>
      <packing>
       <property name="padding">0</property>
       <property name="expand">True</property>
       <property name="fill">False</property>
      </packing>
     </child>

...

    </child>
   </widget>
 </child>
</widget>

</glade-interface>

Listing 7. GnomeSesameFormat.java Fragment

public class GnomeSesameFormat {

...

private void init() throws IOException {
 glade = new LibGlade(System.getProperty("GLADE_FILE"), this);

 // Default values.
 isDryRun = false;
 cipher = new
 AES256();
 fs = new Ext3();
 passphrase = null;
 volName = null;

 // References to various windows used by
 // application.
 topLevel = (Window) glade.getWidget("topLevel");
 devSelUI = (FileSelection) glade.getWidget("devSelUI");
 errUI = (Window) glade.getWidget("errUI");
 progressUI = (Window) glade.getWidget("progressUI");
}

...

public GnomeSesameFormat() throws IOException {
 init();
 device = null;

 Label l = (Label)
                 glade.getWidget("displayedDevice");
 l.setText("none selected");
}

...

public void onFormatButtonClicked(GtkEvent event) {
 Entry entry;

 entry = (Entry)
 glade.getWidget("entryPassphrase");
 passphrase = entry.getText();

 entry = (Entry) glade.getWidget("entryVolumeName");
 volName = entry.getText();

 if (topLevelInputOk ()) {
  ProgressBar p = (ProgressBar) glade.getWidget
                              ("progressBarFormat");
  Label l = (Label) glade.getWidget("labelFormat");
  ProgressBarUpdater pU = new ProgressBarUpdater(p);
  topLevel.setSensitive(false);
  progressUI.show();

  if (! isDryRun) {
   l.setText("Formatting " + device);
   pU.start();
   execSesameFormat();
   pU.stopReq();
   try {
    pU.join();
   }
   catch (java.lang.InterruptedException e) {}
  } else {
   l.setText("[Simulated] Formatting " + device);
   pU.start();
   try {
    Thread.sleep(1000);
   } catch (java.lang.InterruptedException e) {}
  pU.stopReq();
  try {
   pU.join();
  } catch (java.lang.InterruptedException e) {}
 }

 progressUI.hide(); topLevel.setSensitive(true);
}

...

private void error(String msg) {
 Label l = (Label) glade.getWidget("labelErr");
 l.setText(msg);
 topLevel.setSensitive(false);
 errUI.show();
}

public void onErrOkButtonClicked(GtkEvent event) {
 errUI.hide();
 topLevel.setSensitive(true);
}

...


public static void main(String args[]) {
 GnomeSesameFormat gui = null;

 Gtk.init(args);

 LongOpt[] longOpt = new LongOpt[2];
 longOpt[0] = new LongOpt("help",
                    LongOpt.NO_ARGUMENT, null, 'h');
 longOpt[1] = new LongOpt("dry-run",
                    LongOpt.NO_ARGUMENT, null, 'd');

 Getopt g = new Getopt("gnome-sesame-format", args,
                       "hd", longOpt);

 int c;
 boolean optDryRun = false;
 while ((c = g.getopt()) != -1)
  switch (c) {
   case 'h':
    printUsage(0, null, null);
   case 'd':
    optDryRun = true;
    break;
   default:
    printUsage(1, null, null);
  }

 try {
  int i = g.getOptind();
  if (i == 1)
   gui = new GnomeSesameFormat(args[i]);
  else if (i > 1)
   printUsage(1, null, null);
  else
   gui = new GnomeSesameFormat();
   gui.setDryRun(optDryRun);

  Gtk.main();
 } catch (Exception e) {
  System.err.println(e);
  System.exit(1);
 }
}

...