ctrl_panel: Code cleanup

* Remove unnecessary duplication of `THERMOSTAT_PARAMETERS`

* i -> ch

* Separate ParameterTree and Parameter initiation

* Remove extra "channel" option to root parameters, as the "value"
option is already the channel number

pytec/pytec/gui/view/ctrl_panel.py

@@ -66,31 +66,28 @@ class CtrlPanel(QObject):
         self.trees_ui = trees_ui
         self.NUM_CHANNELS = len(trees_ui)
 
-        self.THERMOSTAT_PARAMETERS = [param_tree for i in range(self.NUM_CHANNELS)]
-
         self.params = [
             Parameter.create(
                 name=f"Thermostat Channel {ch} Parameters",
                 type="group",
                 value=ch,
-                children=self.THERMOSTAT_PARAMETERS[ch],
+                children=param_tree,
             )
             for ch in range(self.NUM_CHANNELS)
         ]
 
-        for i, param in enumerate(self.params):
-            param.channel = i
-
-        for i, tree in enumerate(self.trees_ui):
+        for ch, tree in enumerate(self.trees_ui):
             tree.setHeaderHidden(True)
-            tree.setParameters(self.params[i], showTop=False)
-            self.params[i].setValue = self._setValue
-            self.params[i].sigTreeStateChanged.connect(sigTreeStateChanged_handle)
+            tree.setParameters(self.params[ch], showTop=False)
 
             set_tree_label_tips(tree)
 
-            for handle in sigActivated_handles[i]:
-                self.params[i].child(*handle[0]).sigActivated.connect(handle[1])
+        for ch, param in enumerate(self.params):
+            self.params[ch].setValue = self._setValue
+            param.sigTreeStateChanged.connect(sigTreeStateChanged_handle)
+
+            for handle in sigActivated_handles[ch]:
+                param.child(*handle[0]).sigActivated.connect(handle[1])
 
     def _setValue(self, value, blockSignal=None):
         """

pytec/tec_qt.py

@@ -262,7 +262,7 @@ class MainWindow(QtWidgets.QMainWindow):
     @asyncSlot(object, object)
     async def send_command(self, param, changes):
         """Translates parameter tree changes into thermostat set_param calls"""
-        ch = param.channel
+        ch = param.value()
 
         for inner_param, change, data in changes:
             if change == "value":