Fix simulation plot scrubbing not continuously updating simulation time (#1139)

Author: adamkewley

CHANGELOG.md

@@ -7,6 +7,9 @@ on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ## [Upcoming Release]
 
 - Added "Total Length" as an option in the muscle plot panel (#1141)
+- Fixed a regression in the simulation workflow where clicking and dragging
+  the mouse over a simulation plot was no longer continuously scrubbing through
+  the simulation (#1139).
 
 
 ## [0.6.2] - 2025/11/03

libopensimcreator/UI/Simulation/SimulationOutputPlot.cpp

@@ -249,6 +249,7 @@ class osc::SimulationOutputPlot::Impl final {
             plot::pop_style_var();
             plot::pop_style_var();
         }
+        bool plotIsHovered = ui::is_item_hovered(ui::HoveredFlag::AllowWhenOverlapped);
 
         // if the user right-clicks, draw a context menu
         TryDrawOutputContextMenuForLastItem(*m_API, sim, m_OutputExtractor);
@@ -277,7 +278,7 @@ class osc::SimulationOutputPlot::Impl final {
             drawlist.add_line(p1, p2, currentTimeLineColor);
         }
 
-        if (ui::is_item_hovered()) {
+        if (plotIsHovered) {
             const Vector2 mp = ui::get_mouse_ui_position();
             const Vector2 plotLoc = mp - plotRect.ypd_top_left();
             const float relLoc = plotLoc.x / plotRect.width();