ctrl_panel: Keep i_set visible when PID engaged

Since i_set is also plotted, we would also want to see its precise value
too.

pytec/pytec/gui/view/ctrl_panel.py

@@ -6,42 +6,6 @@ from pyqtgraph.parametertree import (
 )
 
 
-class MutexParameter(pTypes.ListParameter):
-    """
-    Mutually exclusive parameter where only one of its children is visible at a time, list selectable.
-
-    The ordering of the list items determines which children will be visible.
-    """
-
-    def __init__(self, **opts):
-        super().__init__(**opts)
-
-        self.sigValueChanged.connect(self.show_chosen_child)
-        self.sigValueChanged.emit(self, self.opts["value"])
-
-    def _get_param_from_value(self, value):
-        if isinstance(self.opts["limits"], dict):
-            values_list = list(self.opts["limits"].values())
-        else:
-            values_list = self.opts["limits"]
-
-        return self.children()[values_list.index(value)]
-
-    @pyqtSlot(object, object)
-    def show_chosen_child(self, value):
-        for param in self.children():
-            param.hide()
-
-        child_to_show = self._get_param_from_value(value.value())
-        child_to_show.show()
-
-        if child_to_show.opts.get("triggerOnShow", None):
-            child_to_show.sigValueChanged.emit(child_to_show, child_to_show.value())
-
-
-registerParameterType("mutex", MutexParameter)
-
-
 def set_tree_label_tips(tree):
     for item in tree.listAllItems():
         p = item.param
@@ -88,6 +52,18 @@ class CtrlPanel(QObject):
             for handle in sigActivated_handles[ch]:
                 param.child(*handle[0]).sigActivated.connect(handle[1])
 
+            param.child("output", "control_method").sigValueChanged.connect(
+                lambda param, value: param.child("i_set").setWritable(
+                    value == "constant_current"
+                )
+            )
+
+            param.child("output", "control_method").sigValueChanged.connect(
+                lambda param, value: param.child("target").show(
+                    value == "temperature_pid"
+                )
+            )
+
     def _setValue(self, value, blockSignal=None):
         """
         Implement 'lock' mechanism for Parameter Type

pytec/pytec/gui/view/param_tree.json

@@ -28,7 +28,7 @@
             {
                "name": "control_method",
                "title": "Control Method",
-               "type": "mutex",
+               "type": "list",
                "limits": {
                   "Constant Current": "constant_current",
                   "Temperature PID": "temperature_pid"
@@ -68,6 +68,7 @@
                      "name": "target",
                      "title": "Setpoint (°C)",
                      "type": "float",
+                     "visible": false,
                      "value": 25,
                      "step": 0.1,
                      "limits": [
@@ -141,7 +142,7 @@
                      "step": 0.1,
                      "limits": [
                         0,
-                        5
+                        4
                      ],
                      "siPrefix": true,
                      "compactHeight": false,
@@ -365,7 +366,7 @@
                      "compactHeight": false,
                      "step": 100,
                      "limits": [
-                        -2000,
+                        0,
                         2000
                      ],
                      "pid_autotune": [