Update simulation results as the sim runs.

Also adds a time axis which grows by 2X at a time rather than to the
size of the current data.

Fixes https://gitlab.com/kicad/code/kicad/-/issues/11255

common/widgets/mathplot.cpp

@@ -2980,10 +2980,10 @@ void mpFXYVector::SetData( const std::vector<double>& xs, const std::vector<doub
     }
     else
     {
-        m_minX  = -1;
-        m_maxX  = 1;
-        m_minY  = -1;
-        m_maxY  = 1;
+        m_minX  = 0;
+        m_maxX  = 0;
+        m_minY  = 0;
+        m_maxY  = 0;
     }
 }
 

eeschema/sim/sim_plot_panel.cpp

@@ -170,6 +170,33 @@ private:
 };
 
 
+class TIME_SCALE : public LIN_SCALE<mpScaleX>
+{
+public:
+    TIME_SCALE( const wxString& name, const wxString& unit, int flags ) :
+            LIN_SCALE( name, unit, flags )
+    {};
+
+    void ExtendDataRange( double minV, double maxV ) override
+    {
+        if( !m_rangeSet )
+        {
+            m_minV = 0;
+            m_maxV = 0;
+            m_rangeSet = true;
+        }
+        else
+        {
+            if( minV < m_minV )
+                m_minV -= abs( maxV - minV );
+
+            if( maxV > m_maxV )
+                m_maxV += abs( maxV - minV );
+        }
+    }
+};
+
+
 template <typename parent>
 class LOG_SCALE : public parent
 {
@@ -511,7 +538,7 @@ void SIM_PLOT_PANEL::updateAxes( int aNewTraceType )
         case ST_TRANSIENT:
             if( !m_axis_x )
             {
-                m_axis_x = new LIN_SCALE<mpScaleX>( wxEmptyString, wxT( "s" ), mpALIGN_BOTTOM );
+                m_axis_x = new TIME_SCALE( wxEmptyString, wxT( "s" ), mpALIGN_BOTTOM );
                 m_axis_x->SetNameAlign( mpALIGN_BOTTOM );
                 m_plotWin->AddLayer( m_axis_x );
 
@@ -793,7 +820,7 @@ void SIM_PLOT_PANEL::DeleteTrace( TRACE* aTrace )
     }
 
     m_plotWin->DelLayer( aTrace, true, true );
-    ResetScales();
+    ResetScales( false );
 }
 
 
@@ -843,9 +870,9 @@ void SIM_PLOT_PANEL::EnableCursor( const wxString& aVectorName, int aType, int a
 }
 
 
-void SIM_PLOT_PANEL::ResetScales()
+void SIM_PLOT_PANEL::ResetScales( bool aIncludeX )
 {
-    if( m_axis_x )
+    if( m_axis_x && aIncludeX )
         m_axis_x->ResetDataRange();
 
     if( m_axis_y1 )

eeschema/sim/sim_plot_panel.h

@@ -300,7 +300,7 @@ public:
                        const wxString& aSignalName );
 
     ///< Reset scale ranges to fit the current traces.
-    void ResetScales();
+    void ResetScales( bool aIncludeX );
 
     ///< Update trace line style
     void UpdateTraceStyle( TRACE* trace );

eeschema/sim/simulator_frame.cpp

@@ -741,7 +741,7 @@ void SIMULATOR_FRAME::onSimFinished( wxCommandEvent& aEvent )
 
     m_simFinished = true;
 
-    m_panel->OnSimFinished();
+    m_panel->OnSimRefresh( true );
 
     m_schematicFrame->RefreshOperatingPointDisplay();
     m_schematicFrame->GetCanvas()->Refresh();
@@ -765,8 +765,8 @@ void SIMULATOR_FRAME::onSimUpdate( wxCommandEvent& aEvent )
 
     if( m_panel->GetCurrentPlotWindow() != m_lastSimPlot )
     {
-        // We need to rerun simulation, as the simulator currently stores
-        // results for another plot
+        // We need to rerun simulation, as the simulator currently stores results for another
+        // plot
         StartSimulation();
     }
     else

eeschema/sim/simulator_panel.cpp

@@ -402,6 +402,10 @@ private:
 };
 
 
+#define ID_SIM_REFRESH 10207
+#define REFRESH_INTERVAL 50   // 20 frames/second.
+
+
 SIMULATOR_PANEL::SIMULATOR_PANEL( SIMULATOR_FRAME* aSimulatorFrame,
                                   SCH_EDIT_FRAME* aSchematicFrame ) :
         SIMULATOR_PANEL_BASE( aSimulatorFrame ),
@@ -409,7 +413,8 @@ SIMULATOR_PANEL::SIMULATOR_PANEL( SIMULATOR_FRAME* aSimulatorFrame,
         m_simulatorFrame( aSimulatorFrame ),
         m_schematicFrame( aSchematicFrame ),
         m_darkMode( true ),
-        m_plotNumber( 0 )
+        m_plotNumber( 0 ),
+        m_refreshTimer( this, ID_SIM_REFRESH )
 {
     // Get the previous size and position of windows:
     LoadSettings( m_schematicFrame->eeconfig() );
@@ -456,6 +461,16 @@ SIMULATOR_PANEL::SIMULATOR_PANEL( SIMULATOR_FRAME* aSimulatorFrame,
     Bind( EVT_SIM_CURSOR_UPDATE, &SIMULATOR_PANEL::onPlotCursorUpdate, this );
     Bind( EVT_WORKBOOK_MODIFIED, &SIMULATOR_PANEL::onNotebookModified, this );
 
+    Bind( wxEVT_TIMER,
+            [&]( wxTimerEvent& aEvent )
+            {
+                OnSimRefresh( false );
+
+                if( m_simulatorFrame->GetSimulator()->IsRunning() )
+                    m_refreshTimer.Start( REFRESH_INTERVAL, wxTIMER_ONE_SHOT );
+            },
+            m_refreshTimer.GetId() );
+
 #ifndef wxHAS_NATIVE_TABART
     // Default non-native tab art has ugly gradients we don't want
     m_plotNotebook->SetArtProvider( new wxAuiSimpleTabArt() );
@@ -1373,7 +1388,7 @@ void SIMULATOR_PANEL::SetUserDefinedSignals( const std::map<int, wxString>& aNew
 
 
 void SIMULATOR_PANEL::updateTrace( const wxString& aVectorName, int aTraceType,
-                                  SIM_PLOT_PANEL* aPlotPanel )
+                                   SIM_PLOT_PANEL* aPlotPanel )
 {
     SIM_TYPE simType = NGSPICE_CIRCUIT_MODEL::CommandToSimType( aPlotPanel->GetSimCommand() );
 
@@ -1402,31 +1417,28 @@ void SIMULATOR_PANEL::updateTrace( const wxString& aVectorName, int aTraceType,
     std::vector<double> data_x;
     std::vector<double> data_y;
 
-    if( m_simulatorFrame->SimFinished() )
+    data_x = simulator()->GetMagPlot( (const char*) xAxisName.c_str() );
+
+    switch( simType )
     {
-        data_x = simulator()->GetMagPlot( (const char*) xAxisName.c_str() );
-
-        switch( simType )
-        {
-        case ST_AC:
-            if( aTraceType & SPT_AC_MAG )
-                data_y = simulator()->GetMagPlot( (const char*) simVectorName.c_str() );
-            else if( aTraceType & SPT_AC_PHASE )
-                data_y = simulator()->GetPhasePlot( (const char*) simVectorName.c_str() );
-            else
-                wxFAIL_MSG( wxT( "Plot type missing AC_PHASE or AC_MAG bit" ) );
-
-            break;
-
-        case ST_NOISE:
-        case ST_DC:
-        case ST_TRANSIENT:
+    case ST_AC:
+        if( aTraceType & SPT_AC_MAG )
             data_y = simulator()->GetMagPlot( (const char*) simVectorName.c_str() );
-            break;
+        else if( aTraceType & SPT_AC_PHASE )
+            data_y = simulator()->GetPhasePlot( (const char*) simVectorName.c_str() );
+        else
+            wxFAIL_MSG( wxT( "Plot type missing AC_PHASE or AC_MAG bit" ) );
 
-        default:
-            wxFAIL_MSG( wxT( "Unhandled plot type" ) );
-        }
+        break;
+
+    case ST_NOISE:
+    case ST_DC:
+    case ST_TRANSIENT:
+        data_y = simulator()->GetMagPlot( (const char*) simVectorName.c_str() );
+        break;
+
+    default:
+        wxFAIL_MSG( wxT( "Unhandled plot type" ) );
     }
 
     unsigned int size = data_x.size();
@@ -2316,11 +2328,15 @@ void SIMULATOR_PANEL::onPlotCursorUpdate( wxCommandEvent& aEvent )
 
 void SIMULATOR_PANEL::OnSimUpdate()
 {
-    // Incremental update
+    if( SIM_PLOT_PANEL* plotPanel = dynamic_cast<SIM_PLOT_PANEL*>( GetCurrentPlotWindow() ) )
+        plotPanel->ResetScales( true );
+
     m_simConsole->Clear();
 
     // Do not export netlist, it is already stored in the simulator
     applyTuners();
+
+    m_refreshTimer.Start( REFRESH_INTERVAL, wxTIMER_ONE_SHOT );
 }
 
 
@@ -2331,7 +2347,7 @@ void SIMULATOR_PANEL::OnSimReport( const wxString& aMsg )
 }
 
 
-void SIMULATOR_PANEL::OnSimFinished()
+void SIMULATOR_PANEL::OnSimRefresh( bool aFinal )
 {
     SIM_TYPE             simType = circuitModel()->GetSimType();
     SIM_PLOT_PANEL_BASE* plotPanelWindow = GetCurrentPlotWindow();
@@ -2397,7 +2413,10 @@ void SIMULATOR_PANEL::OnSimFinished()
         updateSignalsGrid();
 
         plotPanel->GetPlotWin()->UpdateAll();
-        plotPanel->ResetScales();
+
+        if( aFinal )
+            plotPanel->ResetScales( true );
+
         plotPanel->GetPlotWin()->Fit();
     }
     else if( simType == ST_OP )

eeschema/sim/simulator_panel.h

@@ -228,7 +228,7 @@ public:
 
     void OnSimUpdate();
     void OnSimReport( const wxString& aMsg );
-    void OnSimFinished();
+    void OnSimRefresh( bool aFinal );
 
 private:
     /**
@@ -331,6 +331,7 @@ private:
     int                          m_splitterTuneValuesSashPosition;
     bool                         m_darkMode;
     unsigned int                 m_plotNumber;
+    wxTimer                      m_refreshTimer;
 };
 
 #endif // SIMULATOR_PANEL_H

include/widgets/mathplot.h

@@ -748,7 +748,7 @@ public:
         maxV = m_maxV;
     }
 
-    void ExtendDataRange( double minV, double maxV )
+    virtual void ExtendDataRange( double minV, double maxV )
     {
         if( !m_rangeSet )
         {
@@ -771,7 +771,7 @@ public:
 
     void ResetDataRange()
     {
-        m_rangeSet = 0;
+        m_rangeSet = false;
     }
 
     double AbsMaxValue() const