Status bar limits warning

pytec/tec_qt.py

@@ -85,14 +85,12 @@ class WrappedClient(QObject, Client):
     async def _check_zero_limits(self):
         pwm_report = await self.get_pwm()
         for pwm_channel in pwm_report:
+            ch = pwm_channel["channel"]
             if (neg := pwm_channel["max_i_neg"]["value"]) != (pos := pwm_channel["max_i_pos"]["value"]):
                 # Set the minimum of the 2
-                lcd = min(neg, pos)
-                await self.set_param("pwm", pwm_channel["channel"], 'max_i_neg', lcd)
-                await self.set_param("pwm", pwm_channel["channel"], 'max_i_pos', lcd)
-            for limit in ["max_i_pos", "max_v"]:
-                if pwm_channel[limit]["value"] == 0.0:
-                    QtWidgets.QMessageBox.warning(self.parent(), "Limits", "Max {} is set to zero on channel {}!".format("Current" if limit == "max_i_pos" else "Voltage", pwm_channel["channel"]))
+                lowest = min(neg, pos)
+                await self.set_param("pwm", ch, 'max_i_neg', lowest)
+                await self.set_param("pwm", ch, 'max_i_pos', lowest)
 
 
 class ClientWatcher(QObject):
@@ -509,6 +507,39 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
 
         self.plot_settings.setMenu(self.plot_menu)
 
+    @pyqtSlot(list)
+    def set_limits_warning(self, limits_zeroed: list):
+        for channel in limits_zeroed:
+            if len(channel) != 0:
+                break
+        else:
+            self.limits_warning.setPixmap(QtGui.QPixmap())
+            self.limits_warning.setToolTip("")
+            return
+
+        report_str = "The following output limits are set to zero:\n"
+        for ch in range(2):
+            had_zeros = False
+            first = True
+            for limit in "max_i_pos", "max_v":
+                if limit in limits_zeroed[ch]:
+                    if not first:
+                        report_str += ", "
+                    if not had_zeros:
+                        report_str += f"Channel {ch}: "
+                        had_zeros = True
+                    report_str += '"Max Absolute Current"' if limit == "max_i_pos" else '"Max Absolute Voltage"'
+                    first = False
+            if had_zeros:
+                report_str += '\n'
+
+        report_str += "\nThere will be no overall output on channels with zeroed limits."
+
+        pixmapi = getattr(QtWidgets.QStyle.StandardPixmap, "SP_MessageBoxWarning")
+        icon = self.style().standardIcon(pixmapi)
+        self.limits_warning.setPixmap(icon.pixmap(16, 16))
+        self.limits_warning.setToolTip(report_str)
+
     @pyqtSlot(int)
     def set_max_samples(self, samples: int):
         for channel_graph in self.channel_graphs:
@@ -767,12 +798,20 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
 
     @pyqtSlot(list)
     def update_pwm(self, pwm_data):
+        channel_zeroed_limits = [[] for i in range(2)]
+
         for pwm_params in pwm_data:
             channel = pwm_params["channel"]
             with QSignalBlocker(self.params[channel]):
                 self.params[channel].child("Output Config", "Limits", "Max Absolute Voltage").setValue(pwm_params["max_v"]["value"])
                 self.params[channel].child("Output Config", "Limits", "Max Absolute Current").setValue(pwm_params["max_i_pos"]["value"])
 
+            for limit in "max_i_pos", "max_v":
+                if pwm_params[limit]["value"] == 0.0:
+                    channel_zeroed_limits[channel].append(limit)
+
+        self.set_limits_warning(channel_zeroed_limits)
+
     @pyqtSlot(list)
     def update_postfilter(self, postfilter_data):
         for postfilter_params in postfilter_data:

pytec/tec_qt.ui

@@ -252,6 +252,9 @@
              </property>
             </widget>
            </item>
+           <item>
+            <widget class="QLabel" name="limits_warning"/>
+           </item>
            <item>
             <widget class="QLabel" name="background_task_lbl">
              <property name="text">

pytec/ui_tec_qt.py

@@ -127,6 +127,9 @@ class Ui_MainWindow(object):
         self.plot_settings.setPopupMode(QtWidgets.QToolButton.ToolButtonPopupMode.InstantPopup)
         self.plot_settings.setObjectName("plot_settings")
         self.settings_layout.addWidget(self.plot_settings)
+        self.limits_warning = QtWidgets.QLabel(parent=self.bottom_settings_group)
+        self.limits_warning.setObjectName("limits_warning")
+        self.settings_layout.addWidget(self.limits_warning)
         self.background_task_lbl = QtWidgets.QLabel(parent=self.bottom_settings_group)
         self.background_task_lbl.setObjectName("background_task_lbl")
         self.settings_layout.addWidget(self.background_task_lbl)