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+# -*- python -*-
+'''
+xpybar – xmobar replacement written in python
+Copyright © 2014, 2015, 2016  Mattias Andrée (maandree@member.fsf.org)
+
+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, either version 3 of the License, or
+(at your option) any later version.
+
+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, see <http://www.gnu.org/licenses/>.
+'''
+
+# A xpybar configuration example testing the features of plugins.alsa
+
+import time
+import threading
+
+from plugins.snmp import SNMP
+from plugins.clock import Clock
+
+
+OUTPUT, HEIGHT, YPOS, TOP = 0, 12, 24, True
+
+SCROLL_UP = 4
+SCROLL_DOWN = 5
+
+clock = Clock(sync_to = 2 * Clock.SECONDS)
+
+keys = SNMP().keys
+index = 0
+
+start_ = start
+def start():
+    start_()
+    async(lambda : clock.continuous_sync(lambda : bar.invalidate()))
+
+def redraw():
+    text = '%s: %i' % (keys[index], SNMP()[keys[index]])
+    bar.clear()
+    bar.draw_coloured_text(0, 10, 0, 2, text)
+
+def unhandled_event(e):
+    global index
+    if isinstance(e, Xlib.protocol.event.ButtonPress):
+        if e.detail == SCROLL_UP:
+            index = min(index + 1, len(keys) - 1)
+        elif e.detail == SCROLL_DOWN:
+            index = max(index - 1, 0)
+        bar.invalidate()
+