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Date/Time: Mon, 19 May 2025 16:23:39 +0000

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Post From: Accesing Prive Color Value

[2024-02-06 08:02:40]
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User366743 - Posts: 14
OK. I cleaned up few things and the files compiled. However, I did not get the data I was looking for.
Example 1 (with the ColorBar member)
#include "sierrachart.h"
SCDLLName("ReadTest2")

/*
First Test by WP
*/
int cVal = 0;
unsigned int ColorValue = 0;
SCSFExport scsf_ColorBar(SCStudyInterfaceRef sc)
{

  SCString msg;
  SCSubgraphRef ColorBar = sc.Subgraph[0];
  SCInputRef i_myNumb = sc.Input[1];
  

/*
  if (sc.GraphDrawType != GDT_CUSTOM)
  {
    ColorBar.Name = "ColorBar";
        
    return;
  
  }
*/  
  if (sc.SetDefaults)  {
      sc.GraphName = "ColorBar";
      sc.GraphRegion = 0;
      i_myNumb.Name = "FirstVal";
        
      //sc.AutoLoop = 1;
      return;
    }

    
  ColorBar.DrawStyle = DRAWSTYLE_COLOR_BAR;
  ColorValue = ColorBar.PrimaryColor;

  /*
  255 0 255 magentra / entry
  211 211 211 gray / extended
  0 100 0 dark green / bullish
  0 255 0 light green / strong bullish
  139 0 0 dark red / bearish
  255 0 0 light red / strong bearish
  255 255 0 golden bar / long
  255 255 200 golden bar / short
  0 255 255 cyan / flat
  */  
    
    if (ColorValue == RGB(255,0,255)){
    cVal = 10;
    } else if (ColorValue == RGB(211,211,211)){
    cVal = 20;
    } else if (ColorValue == RGB(0,100,0)){
    cVal = 30;
    } else if (ColorValue == RGB(0,255,0)){
    cVal = 40;
    } else if (ColorValue == RGB(139,0,0)){
    cVal = 50;
    } else if (ColorValue == RGB(255,0,0)){
    cVal = 60;
    } else if (ColorValue == RGB(0,255,255)){
    cVal = 70;
    } else { cVal = ColorValue; }
    
  

  /*
  if (cVal == 0) {
    cVal = sc.Subgraph[0].DataColor[0]; //Up
  }

  if (cVal == 0) {
    cVal = sc.Subgraph[0].DataColor[3]; //Down
  }
  
  if (cVal == 0) {
    cVal = ColorBar.PrimaryColor; //Down
  }

  */
//It likely returns the default primary color - not what I'm actually looking for.
    i_myNumb.SetInt(cVal);
}

Example 2 with GetStudyDataColorArrayFromChartUsingID also compiled - likely with similar results (will return default values).
This function is rather hard to use in proper context...

#include "sierrachart.h"
SCDLLName("ReadTest3")

int cVal = 0;
unsigned int ColorValue = 0;



SCSFExport scsf_MyStudyColors(SCStudyInterfaceRef sc)
{
  SCSubgraphRef Subgraph_ColorBar = sc.Subgraph[0];
  SCInputRef Input_ChartStudySubgraph = sc.Input[0];
  //SCInputRef In_myNumb = sc.Input[1];
  SCString msg;

  if (sc.SetDefaults)
  {
    // Set the configuration and defaults

    sc.GraphName = "MyStudyColors";

    sc.AutoLoop = 0;

    sc.GraphRegion = 0;
    //In_myNumb.Name = "FirstVal";
    Subgraph_ColorBar.Name = "Bar";
    Subgraph_ColorBar.DrawStyle = DRAWSTYLE_COLOR_BAR;
    Subgraph_ColorBar.PrimaryColor = RGB(200, 200, 0);

    Input_ChartStudySubgraph.Name = "Study Subgraph Reference";
    Input_ChartStudySubgraph.SetChartStudySubgraphValues(1, 1, 0);

    sc.CalculationPrecedence = LOW_PREC_LEVEL;

    return;
  }


  // Do data processing


  SCColorArray DataColorArray;
  sc.GetStudyDataColorArrayFromChartUsingID(Input_ChartStudySubgraph.GetChartNumber(), Input_ChartStudySubgraph.GetStudyID(), Input_ChartStudySubgraph.GetSubgraphIndex(), DataColorArray);

  if (DataColorArray.GetArraySize() > 0)
  {
    for (int BarIndex = sc.UpdateStartIndex; BarIndex < sc.ArraySize; BarIndex++)
    {

      Subgraph_ColorBar[BarIndex] = 1;
      Subgraph_ColorBar.DataColor[BarIndex] = DataColorArray[BarIndex];

    }
  }


}

----------------------------------------
My take on this problem is like follow (if I remember correctly from the distant past): most C++ classes (provide objects implementations) have set (to set a value or reference) and get (to get a value or reference) member functions.
This is not going to work here because I'm not looking for a value that I already have set or for a system default.
I'm looking for a value that has been set by a different object (study - MQ Trender Pro) and even though I can see its effect (color) - I do not have a direct reference to this object (the study does not provide any meaningful output reference is spreadsheet values),
thus this may never work, unless there is an implementation for accessing a color value directly from the graph or from the screen.
This should be possible because C+++ has a lot of power if in good hands (not mine yet).
/*
//from StackOverflow
#include<windows.h>
#include<stdio.h>

typedef WINAPI COLORREF (*GETPIXEL)(HDC, int, int);

int main(int argc, char** argv)
{

HINSTANCE _hGDI = LoadLibrary("gdi32.dll");
if(_hGDI)
{
while(true) {
GETPIXEL pGetPixel = (GETPIXEL)GetProcAddress(_hGDI, "GetPixel");
HDC _hdc = GetDC(NULL);
if(_hdc)
{
POINT _cursor;
GetCursorPos(&_cursor);
COLORREF _color = (*pGetPixel) (_hdc, _cursor.x, _cursor.y);
int _red = GetRValue(_color);
int _green = GetGValue(_color);
int _blue = GetBValue(_color);

printf("Red: 0x%02x\n", _red);
printf("Green: 0x%02x\n", _green);
printf("Blue: 0x%02x\n", _blue);
}
FreeLibrary(_hGDI);
}
}
return 0;
}

*/