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Post From: Subgraph is not updating after a custom menu event

[2023-10-13 02:31:51]
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Mark Lewis - Posts: 25
I have pieced together some code so that I select a user drawing (rectangle in this case), right-click and choose my custom menu item. The code triggers a message to the log with the drawing information but I cannot update my subgraph (Subgraph_BalanceZoneTop) to the value retrieved by the code capturing the event. Also, when I add the custom study it puts the subgraph line (Subgraph_BalanceZoneTop ) at 0. How can I fix these two issues? I have searched and searched the custom study examples. Thanks!


#include "sierrachart.h"

SCDLLName("My Studies")

SCSFExport scsf_BalanceZones(SCStudyInterfaceRef sc)
{
  SCString MessageText;
  
  SCSubgraphRef Subgraph_BalanceZoneTop = sc.Subgraph[0];

if (sc.SetDefaults)
{
    sc.GraphName = "Balance Zones";
    sc.StudyDescription = "";
    sc.GraphRegion = 0;

    Subgraph_BalanceZoneTop.Name = "Balance zone top";
    Subgraph_BalanceZoneTop.DrawStyle = DRAWSTYLE_LINE;
    Subgraph_BalanceZoneTop.PrimaryColor = RGB(127,0,0); // Dark red
    Subgraph_BalanceZoneTop.DrawZeros = true;

return;
}

  int& r_MenuID = sc.GetPersistentInt(1);


  if (sc.LastCallToFunction)
  {
    sc.RemoveACSChartShortcutMenuItem(sc.ChartNumber, r_MenuID);

    return;
  }
  
  if (sc.UpdateStartIndex == 0)
  {
    if (r_MenuID <= 0)
    {
      r_MenuID = sc.AddACSChartShortcutMenuItem(sc.ChartNumber, "Balance zones");
    }

    return;
  }
  
  
  s_UseTool ChartDrawing;

  if (sc.MenuEventID != 0 && sc.MenuEventID == r_MenuID)
  {
    int selectedLineNumber = sc.GetLineNumberOfSelectedUserDrawnDrawing();    
    
    sc.GetUserDrawnDrawingByLineNumber(0, selectedLineNumber, ChartDrawing);
    
    float BalanceZoneHeight = ChartDrawing.BeginValue - ChartDrawing.EndValue;
      
    Subgraph_BalanceZoneTop[sc.Index] = ChartDrawing.BeginValue;
      
    SCString BeginDateTimeString = sc.FormatDateTime(ChartDrawing.BeginDateTime);
    SCString EndDateTimeString = sc.FormatDateTime(ChartDrawing.EndDateTime);
    SCString Msg;
    Msg.Format("Drawing was selected: BeginDateTime=%s, EndDateTime=%s, BeginValue=%f, EndValue=%f, Height=%f." , BeginDateTimeString.GetChars(), EndDateTimeString.GetChars(), ChartDrawing.BeginValue, ChartDrawing.EndValue, BalanceZoneHeight);
    sc.AddMessageToLog(Msg, 1);
  
    return;
  }
}
Date Time Of Last Edit: 2023-10-13 02:33:35