PyThermostat GUI: Implement status line

Co-authored-by: linuswck <linuswck@m-labs.hk>
Co-authored-by: Egor Savkin <es@m-labs.hk>

pythermostat/pythermostat/gui/view/zero_limits_warning_view.py

@@ -0,0 +1,50 @@
+from PyQt6.QtCore import pyqtSlot, QObject
+from PyQt6 import QtWidgets, QtGui
+
+
+class ZeroLimitsWarningView(QObject):
+    def __init__(self, thermostat, style, limit_warning):
+        super().__init__()
+        self._thermostat = thermostat
+        self._thermostat.output_update.connect(self.set_limits_warning)
+        self._lbl = limit_warning
+        self._style = style
+
+    @pyqtSlot(list)
+    def set_limits_warning(self, output_data: list):
+        channels_zeroed_limits = [set() for i in range(self._thermostat.NUM_CHANNELS)]
+
+        for output_params in output_data:
+            channel = output_params["channel"]
+            for limit in "max_i_pos", "max_i_neg", "max_v":
+                if output_params[limit] == 0.0:
+                    channels_zeroed_limits[channel].add(limit)
+
+        channel_disabled = [False, False]
+        report_str = "The following output limit(s) are set to zero:\n"
+        for ch, zeroed_limits in enumerate(channels_zeroed_limits):
+            if {"max_i_pos", "max_i_neg"}.issubset(zeroed_limits):
+                report_str += "Max Cooling Current, Max Heating Current"
+                channel_disabled[ch] = True
+
+            if "max_v" in zeroed_limits:
+                if channel_disabled[ch]:
+                    report_str += ", "
+                report_str += "Max Voltage Difference"
+                channel_disabled[ch] = True
+
+            if channel_disabled[ch]:
+                report_str += f" for Channel {ch}\n"
+
+        report_str += (
+            "\nThese limit(s) are restricting the channel(s) from producing current."
+        )
+
+        if True in channel_disabled:
+            pixmapi = getattr(QtWidgets.QStyle.StandardPixmap, "SP_MessageBoxWarning")
+            icon = self._style.standardIcon(pixmapi)
+            self._lbl.setPixmap(icon.pixmap(16, 16))
+            self._lbl.setToolTip(report_str)
+        else:
+            self._lbl.setPixmap(QtGui.QPixmap())
+            self._lbl.setToolTip(None)

pythermostat/pythermostat/thermostat_qt.py

@@ -11,6 +11,7 @@ from qasync import asyncSlot, asyncClose
 from pythermostat.gui.model.thermostat import Thermostat, ThermostatConnectionState
 from pythermostat.gui.view.connection_details_menu import ConnectionDetailsMenu
 from pythermostat.gui.view.info_box import InfoBox
+from pythermostat.gui.view.zero_limits_warning_view import ZeroLimitsWarningView
 
 
 def get_argparser():
@@ -67,6 +68,12 @@ class MainWindow(QtWidgets.QMainWindow):
         )
         self.connect_btn.setMenu(self.connection_details_menu)
 
+        # Status line
+        self._zero_limits_warning_view = ZeroLimitsWarningView(
+            self._thermostat, self.style(), self.limits_warning
+        )
+        self.loading_spinner.hide()
+
         self.report_apply_btn.clicked.connect(
             lambda: self._thermostat.set_update_s(self.report_refresh_spin.value())
         )