stuff

loop_labeler_ui.py

@@ -107,10 +107,11 @@ class LoopLabeler(QWidget):
         candidate = self.loop_candidates[self.current_candidate]
         start = candidate["start"]
         end = candidate["end"]
+        nframes = len(self.frames)
         self.start_slider.setMinimum(0)
-        self.start_slider.setMaximum(len(self.frames)-2)
-        self.end_slider.setMinimum(1)
-        self.end_slider.setMaximum(len(self.frames)-1)
+        self.start_slider.setMaximum(nframes-2 if nframes > 1 else 0)
+        self.end_slider.setMinimum(start+1)
+        self.end_slider.setMaximum(nframes-1 if nframes > 0 else 0)
         self.start_slider.setValue(start)
         self.end_slider.setValue(end)
         self.preview_idx = 0
@@ -119,7 +120,9 @@ class LoopLabeler(QWidget):
     def on_slider_changed(self):
         start = self.start_slider.value()
         end = self.end_slider.value()
-        if start >= end:
+        # Always keep end > start
+        self.end_slider.setMinimum(start+1)
+        if end <= start:
             end = start + 1
             self.end_slider.setValue(end)
         self.preview_idx = 0