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Post From: Unable to delete drawing placed on different chart

[2019-03-22 22:16:29]
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maxpi - Posts: 185
I copied some example code and made a study. When I set TextDrawing.ChartNumber = 1 it draws the text and erases it at the LastCallToFunction. When I set TextDrawing.ChartNumber = 2 it draws the text on chart#2 but does not erase it at LastCallToFunction.

#include "sierrachart.h"

SCDLLName("Custom Study DLL")

SCSFExport scsf_DrawingToChart2TestStudy(SCStudyInterfaceRef sc)
{
  // Set configuration variables
  if (sc.SetDefaults)
  {
    sc.GraphName = "User Drawn Text";
    sc.StudyDescription = "User drawn text drawing test86.";

    sc.GraphRegion = 0;
    
    sc.AutoLoop = 0; //No automatic looping
    return;
  }
  
  int &TextDrawingLineNumber = sc.GetPersistentInt(1);

  if (sc.LastCallToFunction)
  {
    if (TextDrawingLineNumber != 0)
    {
      // Be sure to remove the Text drawing added as a user drawn drawing
      sc.DeleteUserDrawnACSDrawing(sc.ChartNumber, TextDrawingLineNumber);
    }
    return;
  }

  int BarIndex = sc.ArraySize - 20;

  if (BarIndex < 0)
    return;

  s_UseTool TextDrawing;
  TextDrawing.Clear();//Not necessary but good practice
  TextDrawing.ChartNumber = 1;
  TextDrawing.DrawingType = DRAWING_TEXT;
  
  if(TextDrawingLineNumber != 0)
    TextDrawing.LineNumber = TextDrawingLineNumber;
  
  TextDrawing.AddAsUserDrawnDrawing = 1;
  
  TextDrawing.BeginIndex = BarIndex;
  TextDrawing.BeginValue = sc.High[BarIndex];
  TextDrawing.Color = COLOR_KHAKI;
  TextDrawing.Text = "Movable User Drawn Text Example";
  TextDrawing.FontSize = 18;
  // do not keep adjusting
  TextDrawing.AddMethod = UTAM_ADD_ONLY_IF_NEW;

  sc.UseTool(TextDrawing);

  //Remember the line number which has been automatically assigned
  TextDrawingLineNumber = TextDrawing.LineNumber;
}