made quadrants device an adjustable

phases/full_polarization.py

@@ -129,21 +129,24 @@ class UndRadial(UndShiftRadialBase):
 
 
 
-class UndShiftQuadrants(SimpleDevice):
+class UndShiftQuadrants(Adjustable):
 
     def __init__(self, ID, accuracy=0.001):
         ID += "SHIFT"
+        super().__init__(ID)
         names = ["TL", "BL", "TR", "BR"]
         pvnames = [f"{ID}-{n}" for n in names]
         adjs = {n.lower(): PVAdjustable(pvn + "-SET", pvn, accuracy=accuracy) for n, pvn in zip(names, pvnames)}
-
+        self.adjs = SimpleDevice(ID, **adjs)
-        super().__init__(ID, **adjs)
 
         self.pv_on = PV(ID + "-ON")
         self.pv_go = PV(ID + "-GO")
 
 
-    def set(self, tl, bl, tr, br):
+    def set_target_value(self, value):
+        tl = value
+        br = -tl
+        bl = tr = bl = 0
         vals = (tl, bl, tr, br)
         tasks = [a.set_target_value(v) for a, v in zip(self.adjs, vals)]
 
@@ -156,6 +159,13 @@ class UndShiftQuadrants(SimpleDevice):
             t.wait()
 
 
+    def get_current_value(self):
+        return self.adjs.tl.get_current_value()
+
+    def is_moving(self):
+        return any(a.is_moving() for a in self.adjs)
+
+
 
 class UndTotalK:
     """