scrub optimization

cht/ui/transcript_panel.py

@@ -23,6 +23,7 @@ class TranscriptPanel(Gtk.Box):
         "selection-changed": (GObject.SignalFlags.RUN_FIRST, None, ()),
         "min-chunk-changed": (GObject.SignalFlags.RUN_FIRST, None, (float,)),
         "lines-per-group-changed": (GObject.SignalFlags.RUN_FIRST, None, (int,)),
+        "seek-requested": (GObject.SignalFlags.RUN_FIRST, None, (float,)),
     }
 
     def __init__(self, **kwargs):
@@ -30,6 +31,7 @@ class TranscriptPanel(Gtk.Box):
 
         self._rows: dict[str, Gtk.ListBoxRow] = {}
         self._texts: dict[str, str] = {}
+        self._timestamps: dict[str, float] = {}
         self._order: list[str] = []
         self._selected: list[str] = []
 
@@ -176,6 +178,7 @@ class TranscriptPanel(Gtk.Box):
         self._selected.clear()
         self._rows.clear()
         self._texts.clear()
+        self._timestamps.clear()
         self._order.clear()
         while child := self._list.get_first_child():
             self._list.remove(child)
@@ -186,6 +189,10 @@ class TranscriptPanel(Gtk.Box):
         seg_id = getattr(row, "_seg_id", None)
         if seg_id:
             self.select(seg_id)
+            # Double-activation (Enter key on focused row) → seek
+            ts = self._timestamps.get(seg_id)
+            if ts is not None:
+                self.emit("seek-requested", ts)
 
     def _make_row(self, seg):
         m1, s1 = divmod(int(seg.start), 60)
@@ -208,6 +215,7 @@ class TranscriptPanel(Gtk.Box):
         self._list.append(row)
         self._rows[seg.id] = row
         self._texts[seg.id] = seg.text
+        self._timestamps[seg.id] = seg.start
         self._order.append(seg.id)
 
     def _clear_visual(self):