//+------------------------------------------------------------------+
//|                                                ChartPanorama.mq5 |
//|                                  Copyright 2021, MetaQuotes Ltd. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#include "..\..\Include\Periods.mqh"

//+------------------------------------------------------------------+
//| Script program start function                                    |
//+------------------------------------------------------------------+
void OnStart()
{
   // exact size of price scale is undocumented, use rule of thumb
   const int scale = 60;
   
   // calculate total height, including gutters between windows
   const int w = (int)ChartGetInteger(0, CHART_WINDOWS_TOTAL);
   int height = 0;
   int gutter = 0;
   for(int i = 0; i < w; ++i)
   {
      if(i == 1)
      {
         gutter = (int)ChartGetInteger(0, CHART_WINDOW_YDISTANCE, i) - height;
      }
      height += (int)ChartGetInteger(0, CHART_HEIGHT_IN_PIXELS, i);
   }
   
   Print("Gutter=", gutter, ", total=", gutter * (w - 1));
   height += gutter * (w - 1);
   Print("Height=", height);

   // calculate total width, based on pixel per bar size,
   // also including shift and price scale
   const int shift = (int)(ChartGetInteger(0, CHART_SHIFT) ?
      ChartGetDouble(0, CHART_SHIFT_SIZE) * ChartGetInteger(0, CHART_WIDTH_IN_PIXELS) / 100 : 0);
   Print("Shift=", shift);
   const int pixelPerBar = (int)MathRound(1.0 * ChartGetInteger(0, CHART_WIDTH_IN_PIXELS)
      / ChartGetInteger(0, CHART_WIDTH_IN_BARS));
   const int width = (int)ChartGetInteger(0, CHART_FIRST_VISIBLE_BAR) * pixelPerBar + scale + shift;
   Print("Width=", width);

   // write the image file
   const string filename = _Symbol + "-" + PeriodToString() + "-panorama.png";
   if(ChartScreenShot(0, filename, width, height, ALIGN_LEFT))
   {
      Print("File saved: ", filename);
   }
}
//+------------------------------------------------------------------+
/*

   Gutter=2, total=2
   Height=440
   Shift=74
   Width=2086
   File saved: XAUUSD-H1-panorama.png

*/
//+------------------------------------------------------------------+