From d4548ee476a35fef1a1f0462019895544ca4a2b1 Mon Sep 17 00:00:00 2001
From: Jente Hidskes <hjdskes@gmail.com>
Date: Sun, 30 Jul 2017 12:45:10 +0200
Subject: [PATCH] Window: do not crash when no devices are plugged in

Fixes #65.
---
 piper/window.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/piper/window.py b/piper/window.py
index 386d66e..ad26914 100644
--- a/piper/window.py
+++ b/piper/window.py
@@ -52,6 +52,9 @@ class Window(Gtk.ApplicationWindow):
 
         self._ratbag = ratbag
         self._device = self._fetch_ratbag_device()
+        if self._device is None:
+            self._present_error_dialog("No devices found")
+            return
 
         try:
             capabilities = self._device.capabilities