Change chart type from MQL

 
//+------------------------------------------------------------------+
//|                                                 ChgChartType.mq4 |
//+------------------------------------------------------------------+
#property indicator_chart_window
 
#import "user32.dll"
   int      PostMessageA(int hWnd,int Msg,int wParam,int lParam);
#import
 
#define BARS            33018
#define CANDLES         33019
#define LINE            33022
#define WM_COMMAND      0x0111
 
int init()
{
   PostMessageA( WindowHandle( Symbol(), Period() ), WM_COMMAND, BARS, 0 );
   return( 0 );
}
 
int start()
{      
   return( 0 );
}

Quoting sconti17

Disliked

Good post on changing the chart type zznbrm.
But how do you GET the current chart type?

I have a Heiken Ashi indicator on my chart, but I want to modify it so that it only shows up on the line chart. I know how to change the colors to CLR_NONE (or set the values to NULL), but don't know how to determine what chart type is currently selected...

Ignored

#define VS_BARS                            0
#define VS_CANDLES                         1
#define VS_LINE                            2

#import "ServicesMT4.dll"
int ServiceGetViewChart(int hwndChart);

//+------------------------------------------------------------------+
//| script program start function                                    |
//+------------------------------------------------------------------+
int start()
  {
//----
   int chartType = ServiceGetViewChart(WindowHandle( Symbol(), Period()));
   
   switch (chartType)
   {
     case VS_BARS: Print("Bars chart"); break;
     case VS_CANDLES: Print("Candles"); break;
     case VS_LINE: Print("Line chart"); break;
   }    
   
//----
   return(0);
  }
//+------------------------------------------------------------------+

Quoting vitalhb

Disliked

Hello zznbrm, I seems you know a lot about MT4 internals. Do you know how to change the Symbol used by a chart from a script? thanks

Ignored