gain focus on MPL canvas click

Author: MAKOMO

src/artisanlib/canvas.py

@@ -2943,7 +2943,7 @@ def disconnect_draggableannotations_motion_notifiers(self) -> None:
             pass
 
     def onclick(self, event:'MouseEvent') -> None:
-        self.aw.lcd1.setFocus() # we set the focus to the LCD1 on clicking the MPL canvas to (re-)gain focus while the event minieditor is open
+        self.aw.setFocus() # we set the focus to the ApplicationWindow on clicking the MPL canvas to (re-)gain focus while the event minieditor is open
         try:
             if self.ax is None:
                 return

src/artisanlib/pid.py

@@ -326,7 +326,8 @@ def getDuty(self) -> Optional[float]:
             if self.pidSemaphore.available() < 1:
                 self.pidSemaphore.release(1)
 
-    def derivativeFilter(self) -> LiveSosFilter:
+    @staticmethod
+    def derivativeFilter() -> LiveSosFilter:
         return LiveSosFilter(
                 scipy.signal.iirfilter(1, # order
                 Wn=0.2, # 0 < Wn < fs/2 (fs=1 -> fs/2=0.5)