ensure values are updated after initialization

Author: SBlokhuizen

waveform_editor/tendencies/base.py

@@ -115,6 +115,7 @@ def __init__(self, **kwargs):
                     self._handle_error(error)
 
         self._handle_unknown_kwargs(unknown_kwargs)
+        self.values_changed = True
 
     def _handle_error(self, error):
         """Handle exceptions raised by param assignment and add them as annotations.
@@ -179,18 +180,20 @@ def set_previous_tendency(self, prev_tendency):
         # If the tendency is the first tendency of a repeated tendency, it is linked to
         # the last tendency in the repeated tendency. In this case we can ignore this
         # error.
-        if self.prev_tendency.end > self.start and not self.is_first_repeated:
-            error_msg = (
-                f"The end of the previous tendency ({self.prev_tendency.end})\nis "
-                f"later than the start of the current tendency ({self.start}).\n"
-            )
-            self.annotations.add(self.line_number, error_msg)
-        elif self.prev_tendency.end < self.start:
-            error_msg = (
-                "Previous tendency ends before the start of the current tendency.\n"
-                "The values inbetween the tendencies will be linearly interpolated.\n"
-            )
-            self.annotations.add(self.line_number, error_msg, is_warning=True)
+        if not np.isclose(self.prev_tendency.end, self.start):
+            if self.prev_tendency.end > self.start and not self.is_first_repeated:
+                error_msg = (
+                    f"The end of the previous tendency ({self.prev_tendency.end})\nis "
+                    f"later than the start of the current tendency ({self.start}).\n"
+                )
+                self.annotations.add(self.line_number, error_msg)
+            elif self.prev_tendency.end < self.start:
+                error_msg = (
+                    "Previous tendency ends before the start of the current tendency.\n"
+                    "The values inbetween the tendencies will be linearly interpolated."
+                    "\n"
+                )
+                self.annotations.add(self.line_number, error_msg, is_warning=True)
 
         self.param.trigger("annotations")
 

waveform_editor/tendencies/repeat.py

@@ -12,11 +12,10 @@ class RepeatTendency(BaseTendency):
 
     def __init__(self, **kwargs):
         waveform = kwargs.pop("user_waveform", []) or []
-        super().__init__(**kwargs)
-
         from waveform_editor.waveform import Waveform
 
         self.waveform = Waveform(waveform=waveform, is_repeated=True)
+        super().__init__(**kwargs)
         if not self.waveform.tendencies:
             error_msg = "There are no tendencies in the repeated waveform.\n"
             self.annotations.add(self.line_number, error_msg)
@@ -68,7 +67,7 @@ def get_value(
             Tuple containing the time and its tendency values.
         """
         if not self.waveform.tendencies:
-            return np.array([]), np.array([])
+            return np.array([0]), np.array([0])
         length = self.waveform.calc_length()
         if time is None:
             time, values = self.waveform.get_value()
@@ -103,6 +102,8 @@ def get_derivative(self, time: np.ndarray) -> np.ndarray:
         Returns:
             numpy array containing the derivatives
         """
+        if not self.waveform.tendencies:
+            return np.array([0])
         length = self.waveform.calc_length()
         relative_times = (time - self.start) % length
         derivatives = self.waveform.get_derivative(relative_times)