api/joy: refresh only manually on certain events

Refresh joylist when new listener arrives, and when the joy singleton
just gets created. Enumerating joys all the time causes high CPU usage
for some of the users.

Issue: #279
Backtrace-by: @exulant
Reported-by: @aka2k

1 files changed, 1 insertions, 0 deletions

diff --git a/opentrack/keybinding-worker.cpp b/opentrack/keybinding-worker.cpp
index b0cef22d..39693a7c 100644
--- a/opentrack/keybinding-worker.cpp
+++ b/opentrack/keybinding-worker.cpp
@@ -164,6 +164,7 @@ KeybindingWorker::fun* KeybindingWorker::_add_receiver(fun& receiver)
     receivers.push_back(std::unique_ptr<fun>(new fun(receiver)));
     fun* f = receivers[receivers.size() - 1].get();
     qDebug() << "add receiver" << (long) f;
+    joy_ctx.refresh();
     return f;
 }