scrub optimization

cht/ui/frames_panel.py

@@ -24,12 +24,14 @@ class FramesPanel(Gtk.Box):
         "selection-changed": (GObject.SignalFlags.RUN_FIRST, None, ()),
         "capture-requested": (GObject.SignalFlags.RUN_FIRST, None, ()),
         "threshold-changed": (GObject.SignalFlags.RUN_FIRST, None, (float,)),
+        "seek-requested": (GObject.SignalFlags.RUN_FIRST, None, (float,)),
     }
 
     def __init__(self, **kwargs):
         super().__init__(orientation=Gtk.Orientation.VERTICAL, spacing=0, **kwargs)
 
         self._widgets: dict[str, Gtk.Box] = {}
+        self._timestamps: dict[str, float] = {}
         self._order: list[str] = []
         self._selected: str | None = None
 
@@ -105,10 +107,11 @@ class FramesPanel(Gtk.Box):
         box.append(label)
 
         gesture = Gtk.GestureClick()
-        gesture.connect("released", lambda g, n, x, y, fid=frame_id: self.select(fid))
+        gesture.connect("released", self._on_frame_click, frame_id)
         box.add_controller(gesture)
 
         self._widgets[frame_id] = box
+        self._timestamps[frame_id] = timestamp
         self._order.append(frame_id)
         self._strip.append(box)
 
@@ -117,6 +120,12 @@ class FramesPanel(Gtk.Box):
 
         log.info("Thumbnail: %s at %.1fs", frame_id, timestamp)
 
+    def _on_frame_click(self, gesture, n_press, x, y, frame_id):
+        self.select(frame_id)
+        if n_press == 2:
+            ts = self._timestamps.get(frame_id, 0)
+            self.emit("seek-requested", ts)
+
     def load_items(self, items: list[dict]):
         """Bulk load. Each dict has 'id', 'pixbuf', 'timestamp'."""
         self.clear()
@@ -171,6 +180,7 @@ class FramesPanel(Gtk.Box):
         """Remove all items and reset state."""
         self._selected = None
         self._widgets.clear()
+        self._timestamps.clear()
         self._order.clear()
         while child := self._strip.get_first_child():
             self._strip.remove(child)