GUI

The GUI is written using PySide2 and consists of one main PVP_Gui object that instantiates a series of GUI Widgets. The GUI is responsible for setting ventilation control parameters and sending them to the controller (see set_control()), as well as receiving and displaying sensor values (get_sensors()).

The GUI also feeds the Alarm_Manager SensorValues objects so that it can compute alarm state. The Alarm_Manager reciprocally updates the GUI with Alarm s (PVP_Gui.handle_alarm()) and Alarm limits (PVP_Gui.limits_updated()).

The main polling loop of the GUI is PVP_Gui.update_gui() which queries the controller for new SensorValues and distributes them to all listening widgets (see method documentation for more details). The rest of the GUI is event driven, usually with Qt Signals and Slots.

The GUI is configured by the values module, in particular it creates

• Display widgets in the left “sensor monitor” box from all Value s in DISPLAY_MONITOR ,

• Display widgets in the right “control” box from all Value s in DISPLAY_CONTROL , and

• Plot widgets in the center plot box from all Value s in PLOT

The GUI is not intended to be launched alone, as it needs an active coordinator to communicate with the controller process and a few prelaunch preparations (launch_gui()). PVP should be started like:

python3 -m pvp.main

Module Overview

PVP_Gui

Main GUI Object that controls all the others!

Widgets

Widgets used by main GUI

IO

Stylesheets used by the GUI

Screenshot