Fixed timeline mouse-click behavior and scrollbars

rqt_bag/src/rqt_bag/bag_timeline.py

@@ -555,6 +555,9 @@ def translate_timeline_left(self):
     def translate_timeline_right(self):
         self._timeline_frame.translate_timeline_right()
 
+    def update_size(self):
+        self._timeline_frame.update_size()
+
     # Publishing
     def is_publishing(self, topic):
         return self._player and self._player.is_publishing(topic)

rqt_bag/src/rqt_bag/bag_widget.py

@@ -436,6 +436,7 @@ def shutdown_all(self):
         self._timeline.handle_close()
 
     def update_size(self):
+        self._timeline.update_size()
         self._resizeEvent(QResizeEvent(self.size(), self.size()))
 
     def on_mousewheel(self, event):

rqt_bag/src/rqt_bag/timeline_frame.py

@@ -413,6 +413,9 @@ def _layout(self):
         if new_history_bottom != self._history_bottom:
             self._history_bottom = new_history_bottom
 
+    def update_size(self):
+        self._layout()
+
     def _draw_topic_histories(self, painter):
         """
         Draw all topic messages.