git.gag.com Git - fw/altos/blob - altosuilib/AltosScanUI.java

   1 /*
   2  * Copyright © 2011 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  17  */
  18
  19 package org.altusmetrum.altosuilib_11;
  20
  21 import java.awt.*;
  22 import java.awt.event.*;
  23 import javax.swing.*;
  24 import javax.swing.event.*;
  25 import java.io.*;
  26 import java.util.*;
  27 import java.text.*;
  28 import java.util.concurrent.*;
  29 import org.altusmetrum.altoslib_11.*;
  30
  31 class AltosScanResult {
  32         String          callsign;
  33         int             serial;
  34         int             flight;
  35         AltosFrequency  frequency;
  36         int             telemetry;
  37         int             rate;
  38
  39         boolean interrupted = false;
  40
  41         public String toString() {
  42                 return String.format("%-9.9s serial %-4d flight %-4d (%s %s %d)",
  43                                      callsign, serial, flight,
  44                                      frequency.toShortString(),
  45                                      AltosLib.telemetry_name(telemetry),
  46                                      AltosLib.ao_telemetry_rate_values[rate]);
  47         }
  48
  49         public String toShortString() {
  50                 return String.format("%s %d %d %7.3f %d %d",
  51                                      callsign, serial, flight, frequency, telemetry, rate);
  52         }
  53
  54         public AltosScanResult(String in_callsign, int in_serial,
  55                                int in_flight, AltosFrequency in_frequency,
  56                                int in_telemetry,
  57                                int in_rate) {
  58                 callsign = in_callsign;
  59                 serial = in_serial;
  60                 flight = in_flight;
  61                 frequency = in_frequency;
  62                 telemetry = in_telemetry;
  63                 rate = in_rate;
  64         }
  65
  66         public int hashCode() {
  67                 return serial ^ frequency.hashCode() ^ telemetry ^ rate;
  68         }
  69
  70         public boolean equals(Object o) {
  71                 if (o == null)
  72                         return false;
  73                 if (!(o instanceof AltosScanResult))
  74                         return false;
  75                 AltosScanResult other = (AltosScanResult) o;
  76                 return (serial == other.serial &&
  77                         frequency.equals(other.frequency) &&
  78                         telemetry == other.telemetry &&
  79                         rate == other.rate);
  80         }
  81
  82         public boolean up_to_date(AltosScanResult other) {
  83                 if (flight == 0 && other.flight != 0) {
  84                         flight = other.flight;
  85                         return false;
  86                 }
  87                 if (callsign.equals("N0CALL") && !other.callsign.equals("N0CALL")) {
  88                         callsign = other.callsign;
  89                         return false;
  90                 }
  91                 return true;
  92         }
  93 }
  94
  95 class AltosScanResults extends LinkedList<AltosScanResult> implements ListModel<AltosScanResult> {
  96
  97         LinkedList<ListDataListener>    listeners = new LinkedList<ListDataListener>();
  98
  99         void changed(ListDataEvent de) {
 100                 for (ListDataListener l : listeners)
 101                         l.contentsChanged(de);
 102         }
 103
 104         public boolean add(AltosScanResult r) {
 105                 int i = 0;
 106                 for (AltosScanResult old : this) {
 107                         if (old.equals(r)) {
 108                                 if (!old.up_to_date(r))
 109                                         changed (new ListDataEvent(this,
 110                                                                    ListDataEvent.CONTENTS_CHANGED,
 111                                                                    i, i));
 112                                 return true;
 113                         }
 114                         i++;
 115                 }
 116
 117                 super.add(r);
 118                 changed(new ListDataEvent(this,
 119                                           ListDataEvent.INTERVAL_ADDED,
 120                                           this.size() - 2, this.size() - 1));
 121                 return true;
 122         }
 123
 124         public void addListDataListener(ListDataListener l) {
 125                 listeners.add(l);
 126         }
 127
 128         public void removeListDataListener(ListDataListener l) {
 129                 listeners.remove(l);
 130         }
 131
 132         public AltosScanResult getElementAt(int i) {
 133                 return this.get(i);
 134         }
 135
 136         public int getSize() {
 137                 return this.size();
 138         }
 139 }
 140
 141 public class AltosScanUI
 142         extends AltosUIDialog
 143         implements ActionListener
 144 {
 145         AltosUIFrame                    owner;
 146         AltosDevice                     device;
 147         AltosConfigData                 config_data;
 148         AltosTelemetryReader            reader;
 149         private JList<AltosScanResult>  list;
 150         private JLabel                  scanning_label;
 151         private JLabel                  frequency_label;
 152         private JLabel                  telemetry_label;
 153         private JLabel                  rate_label;
 154         private JButton                 cancel_button;
 155         private JButton                 monitor_button;
 156         private JCheckBox[]             telemetry_boxes;
 157         private JCheckBox[]             rate_boxes;
 158         javax.swing.Timer               timer;
 159         AltosScanResults                results = new AltosScanResults();
 160
 161         int                             telemetry;
 162         boolean                         select_telemetry = false;
 163
 164         int                             rate;
 165         boolean                         select_rate = false;
 166
 167         final static int                timeout = 1200;
 168         TelemetryHandler                handler;
 169         Thread                          thread;
 170         AltosFrequency[]                frequencies;
 171         int                             frequency_index;
 172         int                             packet_count;
 173         int                             tick_count;
 174
 175         void scan_exception(Exception e) {
 176                 if (e instanceof FileNotFoundException) {
 177                         JOptionPane.showMessageDialog(owner,
 178                                                       ((FileNotFoundException) e).getMessage(),
 179                                                       "Cannot open target device",
 180                                                       JOptionPane.ERROR_MESSAGE);
 181                 } else if (e instanceof AltosSerialInUseException) {
 182                         JOptionPane.showMessageDialog(owner,
 183                                                       String.format("Device \"%s\" already in use",
 184                                                                     device.toShortString()),
 185                                                       "Device in use",
 186                                                       JOptionPane.ERROR_MESSAGE);
 187                 } else if (e instanceof IOException) {
 188                         IOException ee = (IOException) e;
 189                         JOptionPane.showMessageDialog(owner,
 190                                                       device.toShortString(),
 191                                                       ee.getLocalizedMessage(),
 192                                                       JOptionPane.ERROR_MESSAGE);
 193                 } else {
 194                         JOptionPane.showMessageDialog(owner,
 195                                                       String.format("Connection to \"%s\" failed",
 196                                                                     device.toShortString()),
 197                                                       "Connection Failed",
 198                                                       JOptionPane.ERROR_MESSAGE);
 199                 }
 200                 close();
 201         }
 202
 203         class TelemetryHandler implements Runnable {
 204
 205                 public void run() {
 206
 207                         boolean interrupted = false;
 208
 209                         try {
 210                                 for (;;) {
 211                                         try {
 212                                                 AltosState      state = reader.read();
 213                                                 if (state == null)
 214                                                         continue;
 215                                                 packet_count++;
 216                                                 if (state.flight != AltosLib.MISSING) {
 217                                                         final AltosScanResult   result = new AltosScanResult(state.callsign,
 218                                                                                                              state.serial,
 219                                                                                                              state.flight,
 220                                                                                                              frequencies[frequency_index],
 221                                                                                                              telemetry,
 222                                                                                                              rate);
 223                                                         Runnable r = new Runnable() {
 224                                                                         public void run() {
 225                                                                                 results.add(result);
 226                                                                         }
 227                                                                 };
 228                                                         SwingUtilities.invokeLater(r);
 229                                                 }
 230                                         } catch (ParseException pp) {
 231                                         } catch (AltosCRCException ce) {
 232                                         }
 233                                 }
 234                         } catch (InterruptedException ee) {
 235                                 interrupted = true;
 236                         } catch (IOException ie) {
 237                         } finally {
 238                                 reader.close(interrupted);
 239                         }
 240                 }
 241         }
 242
 243         void set_label() {
 244                 frequency_label.setText(String.format("Frequency: %s", frequencies[frequency_index].toString()));
 245                 if (select_telemetry)
 246                         telemetry_label.setText(String.format("Telemetry: %s", AltosLib.telemetry_name(telemetry)));
 247                 if (select_rate)
 248                         rate_label.setText(String.format("Rate: %d baud", AltosLib.ao_telemetry_rate_values[rate]));
 249         }
 250
 251         void set_telemetry() {
 252                 reader.set_telemetry(telemetry);
 253         }
 254
 255         void set_rate() {
 256                 reader.set_telemetry_rate(rate);
 257         }
 258
 259         void set_frequency() throws InterruptedException, TimeoutException {
 260                 reader.set_frequency(frequencies[frequency_index].frequency);
 261                 reader.reset();
 262         }
 263
 264         void next() throws InterruptedException, TimeoutException {
 265                 reader.set_monitor(false);
 266
 267                 if (select_rate) {
 268                         boolean wrapped = false;
 269                         do {
 270                                 ++rate;
 271                                 if (rate > AltosLib.ao_telemetry_rate_max) {
 272                                         wrapped = true;
 273                                         rate = 0;
 274                                 }
 275                         } while (!rate_boxes[rate].isSelected());
 276                         set_rate();
 277                         if (!wrapped) {
 278                                 set_label();
 279                                 return;
 280                         }
 281                 }
 282                 if (select_telemetry) {
 283                         boolean wrapped = false;
 284                         do {
 285                                 ++telemetry;
 286                                 if (telemetry > AltosLib.ao_telemetry_max) {
 287                                         wrapped = true;
 288                                         telemetry = AltosLib.ao_telemetry_min;
 289                                 }
 290                         } while (!telemetry_boxes[telemetry - AltosLib.ao_telemetry_min].isSelected());
 291                         set_telemetry();
 292                         if (!wrapped) {
 293                                 set_label();
 294                                 return;
 295                         }
 296                 }
 297                 packet_count = 0;
 298                 tick_count = 0;
 299                 ++frequency_index;
 300                 if (frequency_index >= frequencies.length)
 301                         frequency_index = 0;
 302                 set_frequency();
 303                 set_label();
 304                 reader.set_monitor(true);
 305         }
 306
 307
 308         void close() {
 309                 if (thread != null && thread.isAlive()) {
 310                         thread.interrupt();
 311                         try {
 312                                 thread.join();
 313                         } catch (InterruptedException ie) {}
 314                 }
 315                 thread = null;
 316                 if (timer != null)
 317                         timer.stop();
 318                 setVisible(false);
 319                 dispose();
 320         }
 321
 322         void tick_timer() throws InterruptedException, TimeoutException {
 323                 ++tick_count;
 324                 if (packet_count == 0 || tick_count > 5)
 325                         next();
 326         }
 327
 328         public void actionPerformed(ActionEvent e) {
 329                 String cmd = e.getActionCommand();
 330
 331                 try {
 332                         if (cmd.equals("cancel"))
 333                                 close();
 334
 335                         if (cmd.equals("tick"))
 336                                 tick_timer();
 337
 338                         if (cmd.equals("telemetry")) {
 339                                 int k;
 340                                 int scanning_telemetry = 0;
 341                                 for (k = AltosLib.ao_telemetry_min; k <= AltosLib.ao_telemetry_max; k++) {
 342                                         int j = k - AltosLib.ao_telemetry_min;
 343                                         if (telemetry_boxes[j].isSelected())
 344                                                 scanning_telemetry |= (1 << k);
 345                                 }
 346                                 if (scanning_telemetry == 0) {
 347                                         scanning_telemetry |= (1 << AltosLib.ao_telemetry_standard);
 348                                         telemetry_boxes[AltosLib.ao_telemetry_standard - AltosLib.ao_telemetry_min].setSelected(true);
 349                                 }
 350                                 AltosUIPreferences.set_scanning_telemetry(scanning_telemetry);
 351                         }
 352
 353                         if (cmd.equals("rate")) {
 354                                 int k;
 355                                 int scanning_rate = 0;
 356                                 for (k = 0; k <= AltosLib.ao_telemetry_rate_max; k++) {
 357                                         if (rate_boxes[k].isSelected())
 358                                                 scanning_rate |= (1 << k);
 359                                 }
 360                                 if (scanning_rate == 0) {
 361                                         scanning_rate = (1 << 0);
 362                                         rate_boxes[0].setSelected(true);
 363                                 }
 364                                 AltosUIPreferences.set_scanning_telemetry_rate(scanning_rate);
 365                         }
 366
 367                         if (cmd.equals("monitor")) {
 368                                 close();
 369                                 AltosScanResult r = (AltosScanResult) (list.getSelectedValue());
 370                                 if (r != null) {
 371                                         if (device != null) {
 372                                                 if (reader != null) {
 373                                                         reader.set_telemetry(r.telemetry);
 374                                                         reader.set_telemetry_rate(r.rate);
 375                                                         reader.set_frequency(r.frequency.frequency);
 376                                                         reader.save_frequency();
 377                                                         reader.save_telemetry();
 378                                                         reader.save_telemetry_rate();
 379                                                         owner.scan_device_selected(device);
 380                                                 }
 381                                         }
 382                                 }
 383                         }
 384                 } catch (TimeoutException te) {
 385                         close();
 386                 } catch (InterruptedException ie) {
 387                         close();
 388                 }
 389         }
 390
 391         /* A window listener to catch closing events and tell the config code */
 392         class ConfigListener extends WindowAdapter {
 393                 AltosScanUI     ui;
 394
 395                 public ConfigListener(AltosScanUI this_ui) {
 396                         ui = this_ui;
 397                 }
 398
 399                 public void windowClosing(WindowEvent e) {
 400                         ui.actionPerformed(new ActionEvent(e.getSource(),
 401                                                            ActionEvent.ACTION_PERFORMED,
 402                                                            "close"));
 403                 }
 404         }
 405
 406         private boolean open() {
 407                 device = AltosDeviceUIDialog.show(owner, AltosLib.product_basestation);
 408                 if (device == null)
 409                         return false;
 410                 try {
 411                         reader = new AltosTelemetryReader(new AltosSerial(device));
 412                         set_frequency();
 413                         set_telemetry();
 414                         set_rate();
 415                         try {
 416                                 Thread.sleep(100);
 417                         } catch (InterruptedException ie) {
 418                         }
 419                         reader.flush();
 420                         handler = new TelemetryHandler();
 421                         thread = new Thread(handler);
 422                         thread.start();
 423                         return true;
 424                 } catch (FileNotFoundException ee) {
 425                         JOptionPane.showMessageDialog(owner,
 426                                                       ee.getMessage(),
 427                                                       "Cannot open target device",
 428                                                       JOptionPane.ERROR_MESSAGE);
 429                 } catch (AltosSerialInUseException si) {
 430                         JOptionPane.showMessageDialog(owner,
 431                                                       String.format("Device \"%s\" already in use",
 432                                                                     device.toShortString()),
 433                                                       "Device in use",
 434                                                       JOptionPane.ERROR_MESSAGE);
 435                 } catch (IOException ee) {
 436                         JOptionPane.showMessageDialog(owner,
 437                                                       device.toShortString(),
 438                                                       "Unkonwn I/O error",
 439                                                       JOptionPane.ERROR_MESSAGE);
 440                 } catch (TimeoutException te) {
 441                         JOptionPane.showMessageDialog(owner,
 442                                                       device.toShortString(),
 443                                                       "Timeout error",
 444                                                       JOptionPane.ERROR_MESSAGE);
 445                 } catch (InterruptedException ie) {
 446                         JOptionPane.showMessageDialog(owner,
 447                                                       device.toShortString(),
 448                                                       "Interrupted exception",
 449                                                       JOptionPane.ERROR_MESSAGE);
 450                 }
 451                 if (reader != null)
 452                         reader.close(false);
 453                 return false;
 454         }
 455
 456         public AltosScanUI(AltosUIFrame in_owner, boolean in_select_telemetry) {
 457                 super(in_owner, "Scan Telemetry", false);
 458
 459                 owner = in_owner;
 460                 select_telemetry = in_select_telemetry;
 461                 select_rate = true;
 462
 463                 frequencies = AltosUIPreferences.common_frequencies();
 464                 frequency_index = 0;
 465
 466                 telemetry = AltosLib.ao_telemetry_standard;
 467                 rate = 0;
 468
 469                 if (!open())
 470                         return;
 471
 472                 Container               pane = getContentPane();
 473                 GridBagConstraints      c = new GridBagConstraints();
 474                 Insets                  i = new Insets(4,4,4,4);
 475
 476                 timer = new javax.swing.Timer(timeout, this);
 477                 timer.setActionCommand("tick");
 478                 timer.restart();
 479
 480                 owner = in_owner;
 481
 482                 pane.setLayout(new GridBagLayout());
 483
 484                 scanning_label = new JLabel("Scanning:");
 485                 frequency_label = new JLabel("");
 486
 487                 if (select_telemetry) {
 488                         telemetry_label = new JLabel("");
 489                         telemetry_label.setPreferredSize(new Dimension(100, 16));
 490                         telemetry = AltosLib.ao_telemetry_min;
 491                 } else {
 492                         telemetry = AltosLib.ao_telemetry_standard;
 493                 }
 494
 495                 if (select_rate) {
 496                         rate_label = new JLabel("");
 497                         rate_label.setPreferredSize(new Dimension(100, 16));
 498                 }
 499
 500                 set_label();
 501
 502                 c.fill = GridBagConstraints.HORIZONTAL;
 503                 c.anchor = GridBagConstraints.LINE_START;
 504                 c.insets = i;
 505                 c.weightx = 0;
 506                 c.weighty = 0;
 507
 508                 c.gridx = 0;
 509                 c.gridy = 0;
 510                 c.gridwidth = 2;
 511
 512                 pane.add(scanning_label, c);
 513                 c.gridy = 1;
 514                 pane.add(frequency_label, c);
 515
 516                 int     y_offset_rate = 3;
 517                 int     y_offset_telem = 3;
 518
 519                 int     check_x = 0;
 520
 521                 if (select_rate && select_telemetry)
 522                         c.gridwidth = 1;
 523
 524                 if (select_rate) {
 525                         c.gridy = 2;
 526                         c.gridx = check_x++;
 527                         pane.add(rate_label, c);
 528
 529                         int     scanning_rate = AltosUIPreferences.scanning_telemetry_rate();
 530                         rate_boxes = new JCheckBox[AltosLib.ao_telemetry_rate_max + 1];
 531                         for (int k = 0; k <= AltosLib.ao_telemetry_rate_max; k++) {
 532                                 rate_boxes[k] = new JCheckBox(String.format("%d baud", AltosLib.ao_telemetry_rate_values[k]));
 533                                 c.gridy = y_offset_rate + k;
 534                                 pane.add(rate_boxes[k], c);
 535                                 rate_boxes[k].setActionCommand("rate");
 536                                 rate_boxes[k].addActionListener(this);
 537                                 rate_boxes[k].setSelected((scanning_rate & (1 << k)) != 0);
 538                         }
 539                         y_offset_rate += AltosLib.ao_telemetry_rate_max + 1;
 540                 }
 541
 542                 if (select_telemetry) {
 543                         c.gridy = 2;
 544                         c.gridx = check_x++;
 545                         pane.add(telemetry_label, c);
 546
 547                         int     scanning_telemetry = AltosUIPreferences.scanning_telemetry();
 548                         telemetry_boxes = new JCheckBox[AltosLib.ao_telemetry_max - AltosLib.ao_telemetry_min + 1];
 549                         for (int k = AltosLib.ao_telemetry_min; k <= AltosLib.ao_telemetry_max; k++) {
 550                                 int j = k - AltosLib.ao_telemetry_min;
 551                                 telemetry_boxes[j] = new JCheckBox(AltosLib.telemetry_name(k));
 552                                 c.gridy = y_offset_telem + j;
 553                                 pane.add(telemetry_boxes[j], c);
 554                                 telemetry_boxes[j].setActionCommand("telemetry");
 555                                 telemetry_boxes[j].addActionListener(this);
 556                                 telemetry_boxes[j].setSelected((scanning_telemetry & (1 << k)) != 0);
 557                         }
 558                         y_offset_telem += (AltosLib.ao_telemetry_max - AltosLib.ao_telemetry_min + 1);
 559                 }
 560
 561                 int y_offset = Math.max(y_offset_rate, y_offset_telem);
 562
 563                 list = new JList<AltosScanResult>(results) {
 564                                 //Subclass JList to workaround bug 4832765, which can cause the
 565                                 //scroll pane to not let the user easily scroll up to the beginning
 566                                 //of the list.  An alternative would be to set the unitIncrement
 567                                 //of the JScrollBar to a fixed value. You wouldn't get the nice
 568                                 //aligned scrolling, but it should work.
 569                                 public int getScrollableUnitIncrement(Rectangle visibleRect,
 570                                                                       int orientation,
 571                                                                       int direction) {
 572                                         int row;
 573                                         if (orientation == SwingConstants.VERTICAL &&
 574                                             direction < 0 && (row = getFirstVisibleIndex()) != -1) {
 575                                                 Rectangle r = getCellBounds(row, row);
 576                                                 if ((r.y == visibleRect.y) && (row != 0))  {
 577                                                         Point loc = r.getLocation();
 578                                                         loc.y--;
 579                                                         int prevIndex = locationToIndex(loc);
 580                                                         Rectangle prevR = getCellBounds(prevIndex, prevIndex);
 581
 582                                                         if (prevR == null || prevR.y >= r.y) {
 583                                                                 return 0;
 584                                                         }
 585                                                         return prevR.height;
 586                                                 }
 587                                         }
 588                                         return super.getScrollableUnitIncrement(
 589                                                 visibleRect, orientation, direction);
 590                                 }
 591                         };
 592
 593                 list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
 594                 list.setLayoutOrientation(JList.HORIZONTAL_WRAP);
 595                 list.setVisibleRowCount(-1);
 596
 597                 list.addMouseListener(new MouseAdapter() {
 598                                  public void mouseClicked(MouseEvent e) {
 599                                          if (e.getClickCount() == 2) {
 600                                                  monitor_button.doClick(); //emulate button click
 601                                          }
 602                                  }
 603                         });
 604                 JScrollPane listScroller = new JScrollPane(list);
 605                 listScroller.setPreferredSize(new Dimension(400, 80));
 606                 listScroller.setAlignmentX(LEFT_ALIGNMENT);
 607
 608                 //Create a container so that we can add a title around
 609                 //the scroll pane.  Can't add a title directly to the
 610                 //scroll pane because its background would be white.
 611                 //Lay out the label and scroll pane from top to bottom.
 612                 JPanel listPane = new JPanel();
 613                 listPane.setLayout(new BoxLayout(listPane, BoxLayout.PAGE_AXIS));
 614
 615                 JLabel label = new JLabel("Select Device");
 616                 label.setLabelFor(list);
 617                 listPane.add(label);
 618                 listPane.add(Box.createRigidArea(new Dimension(0,5)));
 619                 listPane.add(listScroller);
 620                 listPane.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
 621
 622                 c.fill = GridBagConstraints.BOTH;
 623                 c.anchor = GridBagConstraints.CENTER;
 624                 c.insets = i;
 625                 c.weightx = 1;
 626                 c.weighty = 1;
 627
 628                 c.gridx = 0;
 629                 c.gridy = y_offset;
 630                 c.gridwidth = 2;
 631                 c.anchor = GridBagConstraints.CENTER;
 632
 633                 pane.add(listPane, c);
 634
 635                 cancel_button = new JButton("Cancel");
 636                 cancel_button.addActionListener(this);
 637                 cancel_button.setActionCommand("cancel");
 638
 639                 c.fill = GridBagConstraints.NONE;
 640                 c.anchor = GridBagConstraints.CENTER;
 641                 c.insets = i;
 642                 c.weightx = 1;
 643                 c.weighty = 1;
 644
 645                 c.gridx = 0;
 646                 c.gridy = y_offset + 1;
 647                 c.gridwidth = 1;
 648                 c.anchor = GridBagConstraints.CENTER;
 649
 650                 pane.add(cancel_button, c);
 651
 652                 monitor_button = new JButton("Monitor");
 653                 monitor_button.addActionListener(this);
 654                 monitor_button.setActionCommand("monitor");
 655
 656                 c.fill = GridBagConstraints.NONE;
 657                 c.anchor = GridBagConstraints.CENTER;
 658                 c.insets = i;
 659                 c.weightx = 1;
 660                 c.weighty = 1;
 661
 662                 c.gridx = 1;
 663                 c.gridy = y_offset + 1;
 664                 c.gridwidth = 1;
 665                 c.anchor = GridBagConstraints.CENTER;
 666
 667                 pane.add(monitor_button, c);
 668
 669                 pack();
 670                 setLocationRelativeTo(owner);
 671
 672                 addWindowListener(new ConfigListener(this));
 673
 674                 setVisible(true);
 675         }
 676 }