added connected adjustables

slic/core/adjustable/__init__.py

@@ -11,5 +11,9 @@ from .collection import Collection
 from .combined import Combined
 from .converted import Converted
 from .scaler import Scaler
+from .primarysecondary import PrimarySecondary
+
+
+
 
 

slic/core/adjustable/primarysecondary.py

@@ -0,0 +1,42 @@
+from .adjustable import Adjustable
+
+class PrimarySecondary(Adjustable):
+    """
+    An adjustable which connects or links a secondary adjustable to
+    a primary adjustable. The secondary is then following the primary
+    one according to:
+
+    secondary_target = target * scale_factor + offset
+
+    The speed of the motion is not linked.
+    """
+
+    def __init__(self, ID, primary_adj, secondary_adj, scale_factor=1.0, offset=0, **kwargs):
+        super().__init__(ID, **kwargs)
+
+        self.primary = primary_adj
+        self.secondary = secondary_adj
+        self.adjs = [self.primary, self.secondary]
+
+        self.scale_factor = scale_factor
+        self.offset = offset
+
+    def get_current_value(self):
+        return self.primary.get_current_value()
+
+    def set_target_value(self, value):
+        secondary_target = value * self.scale_factor + self.offset
+
+        tasks = [
+            self.primary.set_target_value(value),
+            self.secondary.set_target_value(secondary_target),
+        ]
+
+        for t in tasks:
+            t.wait()
+
+    def is_moving(self):
+        return any(a.is_moving() for a in self.adjs)
+
+    def __repr__(self):
+        return f"Primary:\n{repr(self.primary)}\nSecondary:\n{repr(self.secondary)}"