+ /* Scanning telemetry */
+ static int scanning_telemetry;
+
+ static LinkedList<AltosFontListener> font_listeners;
+
+ static int font_size = Altos.font_size_medium;
+
+ static LinkedList<AltosUIListener> ui_listeners;
+
+ static String look_and_feel = null;
+
+ /* List of frequencies */
+ final static String common_frequencies_node_name = "COMMON-FREQUENCIES";
+ static AltosFrequency[] common_frequencies;
+
+ final static String frequency_count = "COUNT";
+ final static String frequency_format = "FREQUENCY-%d";
+ final static String description_format = "DESCRIPTION-%d";
+
+ static AltosFrequency[] load_common_frequencies() {
+ AltosFrequency[] frequencies = null;
+ boolean existing = false;
+ try {
+ existing = preferences.nodeExists(common_frequencies_node_name);
+ } catch (BackingStoreException be) {
+ existing = false;
+ }
+ if (existing) {
+ Preferences node = preferences.node(common_frequencies_node_name);
+ int count = node.getInt(frequency_count, 0);
+
+ frequencies = new AltosFrequency[count];
+ for (int i = 0; i < count; i++) {
+ double frequency;
+ String description;
+
+ frequency = node.getDouble(String.format(frequency_format, i), 0.0);
+ description = node.get(String.format(description_format, i), null);
+ frequencies[i] = new AltosFrequency(frequency, description);
+ }
+ } else {
+ frequencies = new AltosFrequency[10];
+ for (int i = 0; i < 10; i++) {
+ frequencies[i] = new AltosFrequency(434.550 + i * .1,
+ String.format("Channel %d", i));
+ }
+ }
+ return frequencies;
+ }
+
+ static void save_common_frequencies(AltosFrequency[] frequencies) {
+ Preferences node = preferences.node(common_frequencies_node_name);
+
+ node.putInt(frequency_count, frequencies.length);
+ for (int i = 0; i < frequencies.length; i++) {
+ node.putDouble(String.format(frequency_format, i), frequencies[i].frequency);
+ node.put(String.format(description_format, i), frequencies[i].description);
+ }
+ }
+ static int launcher_serial;
+
+ static int launcher_channel;
+