problem with MonitorDashWidget addition to dashboard

[twiniars]

in ros kinetic addition of
self._monitor = MonitorDashWidget(self.context)
to dashboard causes the following, cyclic (ca. 1s) console output:
QObject::startTimer: Timers cannot be started from another thread
QObject::killTimer: Timers cannot be stopped from another thread

[dirk-thomas]

Can you please describe what exactly you ran and what the output was. From your description I don't see which line you are referring to.

[twiniars]

In ROS kinetic, ubuntu 16.04 I run the python RQT plugin in the attachment. The plugin containsMonitorDashWidget. As a result the QT prints an error on the console.

QObject::startTimer: Timers cannot be started from another thread
QObject::killTimer: Timers cannot be stopped from another thread

The same code works well in ROS jade, ubuntu 14.04.

irp6_dashboard.py.txt

[dirk-thomas]

Have you tried to use the class according to its documentation?

[twiniars]

When I use the code almost directly from the documentation you mentioned, the problem still occurs. I attach the file. Please note the mistake in documentation. The line
from rqt_robot_dashboard.widgets import MonitorDashWidget, ConsoleDashWidget
should be replaced with
from rqt_robot_dashboard.widgets import MonitorDashWidget, ConsoleDashWidget, BatteryDashWidget

If I do something wrong please let me know.

irp6_dashboard.py.txt

[dirk-thomas]

Maybe @ablasdel can comment on how he is using the dashboard in custom rqt plugins.

[twiniars]

I solved the problem by using signals and slots according to
http://pyqt.sourceforge.net/Docs/PyQt5/signals_slots.html. See updated pull request #106