altoslib: Add units change notification list

This allows the UI to automatically respond to changes in the
preferred units.

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/altoslib/AltosUnitsListener.java b/altoslib/AltosUnitsListener.java
new file mode 100644
index 00000000..50a00cdf
--- /dev/null
+++ b/altoslib/AltosUnitsListener.java
@@ -0,0 +1,22 @@
+/*
+ * Copyright © 2012 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+package org.altusmetrum.AltosLib;
+
+public interface AltosUnitsListener {
+	public void units_changed(boolean imperial_units);
+}