Enh browserfig UI events

mne/viz/_mpl_figure.py

@@ -58,6 +58,7 @@
 from ..fixes import _close_event
 from ..utils import Bunch, _click_ch_name, check_version, logger
 from ._figure import BrowserBase
+from .ui_events import TimeChange, disable_ui_events, publish, subscribe
 from .utils import (
     DraggableLine,
     _events_off,
@@ -566,6 +567,9 @@ def __init__(self, inst, figsize, ica=None, xlabel="Time (s)", **kwargs):
             vline_text=vline_text,
         )
 
+        # Start listening to incoming UI events
+        subscribe(self, "time_change", self._on_time_change_event)
+
     def _get_size(self):
         return self.get_size_inches()
 
@@ -2227,6 +2231,7 @@ def _show_vline(self, xdata):
         text = self._xtick_formatter(xdata, ax_type="vline")[:12]
         self.mne.vline_text.set_text(text)
         self._toggle_vline(True)
+        publish(self, TimeChange(time=xdata))
 
     def _toggle_vline(self, visible):
         """Show or hide the vertical line(s)."""
@@ -2318,6 +2323,16 @@ def _get_scale_bar_texts(self):
 
         return texts
 
+    def _on_time_change_event(self, event):
+        """Respond to the TimeChange UI event."""
+        if self.mne.is_epochs:
+            # last_time = self.mne.n_times / self.mne.info["sfreq"]
+            time = event.time
+        else:
+            time = np.clip(event.time, self.mne.inst.times[0], self.mne.inst.times[-1])
+        with disable_ui_events(self):
+            self._show_vline(time)
+
 
 class MNELineFigure(MNEFigure):
     """Interactive figure for non-scrolling line plots."""