moving midiseq playhead

only works for 120bpm right now

source/native-plugins/resources/midiseq-ui

@@ -373,9 +373,11 @@ class PianoRoll(QGraphicsScene):
     # -------------------------------------------------------------------------
     # Callbacks
 
-    def movePlayHead(self, t):
-        total_duration = 1920 * self.time_sig[0] * self.num_measures 
-        pos = t['bar']*1920*self.time_sig[0] + t['beat']*1920 + t['tick']
+    def movePlayHead(self, transport_info):
+        # TODO: need conversion between frames and PPQ
+        x = 105. # works for 120bpm
+        total_duration = self.time_sig[0] * self.num_measures * x
+        pos = transport_info['frame'] / x
         frac = (pos % total_duration) / total_duration
         self.play_head.setPos(QPointF(frac * self.grid_width, 0))
 
@@ -1108,6 +1110,8 @@ class MainWindow(ExternalUI, QWidget):
             if beat != self.fTransportInfo["beat"]:
                 print(beat)
 
+            old_frame = self.fTransportInfo['frame']
+
             self.fTransportInfo = {
                 "playing": playing,
                 "frame": frame,
@@ -1119,7 +1123,8 @@ class MainWindow(ExternalUI, QWidget):
                 "sigDenom": sigDenom
             }
 
-            self.piano.movePlayHead(self.fTransportInfo)
+            if old_frame != frame:
+                self.piano.movePlayHead(self.fTransportInfo)
 
 
         elif msg == "show":