Using a script in all opened chart windows (user32.dll)

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avatar
372
mar 2015.01.12 12:17
 

Hi,

I think most of you know that script below. You can drag it into a chart, select a timeframe and all opened chart windows will be set to this timeframe.

//+------------------------------------------------------------------+
//|                                                    ChgTF-All.mq4 |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2010, zznbrm"

#property show_inputs

#import "user32.dll"
   int      PostMessageA(int hWnd,int Msg,int wParam,int lParam);
   int      GetWindow(int hWnd,int uCmd);
   int      GetParent(int hWnd);
#import

extern int eintTF = PERIOD_D1;
                   
int start()
{      
   bool blnContinue = true;   
   int intParent = GetParent( WindowHandle( Symbol(), Period() ) );   
   int intChild = GetWindow( intParent, 0 );  
   int intCmd;

// ---  
   
   
   switch( eintTF )
   {
      case PERIOD_M1:   intCmd = 33137;  break;
      case PERIOD_M5:   intCmd = 33138;  break;
      case PERIOD_M15:  intCmd = 33139;  break;
      case PERIOD_M30:  intCmd = 33140;  break;
      case PERIOD_H1:   intCmd = 35400;  break;
      case PERIOD_H4:   intCmd = 33136;  break;
      case PERIOD_D1:   intCmd = 33134;  break;
      case PERIOD_W1:   intCmd = 33141;  break;
      case PERIOD_MN1:  intCmd = 33334;  break;
   }
   
   if ( intChild > 0 )   
   {
      if ( intChild != intParent )   PostMessageA( intChild, 0x0111, intCmd, 0 );
   }
   else      blnContinue = false;   
   
   while( blnContinue )
   {
      intChild = GetWindow( intChild, 2 );   
   
      if ( intChild > 0 )   
      { 
         if ( intChild != intParent )   PostMessageA( intChild, 0x0111, intCmd, 0 );
      }
      else   blnContinue = false;   
   }
   
   // Now do the current window
   PostMessageA( intParent, 0x0111, intCmd, 0 );

   return(0);
}



I have no knowledge about Win32 programming and so I tried to use that frame/structure and use my own code which should be executed in every opened chart window. For the first test I wanted to place a comment with the current Symbol. This is my modification:

 

//+------------------------------------------------------------------+
//|                                                    ChgTF-All.mq4 |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2010, zznbrm"

#import "user32.dll"
   int      PostMessageA(int hWnd,int Msg,int wParam,int lParam);
   int      GetWindow(int hWnd,int uCmd);
   int      GetParent(int hWnd);
#import
                   
int start()
{      
   bool blnContinue = true;   
   int intParent = GetParent( WindowHandle( Symbol(), Period() ) );   
   int intChild = GetWindow( intParent, 0 );  
   int intCmd;

// ---  
   
   if ( intChild > 0 )   
   {
      if ( intChild != intParent )   PostMessageA( intChild, 0x0111, intCmd, 0 );
   }
   else      blnContinue = false;   
   
   while( blnContinue )
   {
      intChild = GetWindow( intChild, 2 );   
   
      if ( intChild > 0 )   
      { 
         if ( intChild != intParent )   PostMessageA( intChild, 0x0111, intCmd, 0 );
      }
      else   blnContinue = false;   
   }
   
   // Now do the current window
   Comment(Symbol());
   return(0);
}


 

Unfortunately, it only works for the window I drag the script into. Can someone please tell me how to fix it? Thanks!! 

avatar
13001
WHRoeder 2015.01.12 15:18 #
 
Don't use PostMessage, use the new Chart Operations - MQL4 Documentation



avatar
372
mar 2015.01.12 18:23 #
 
Thank you! It works!
avatar
372
mar 2015.01.12 18:45 #
 

I made a script to change all timeframes of the opened charts to the chart's timeframe the script is dragged into. That also works but I always get a system message:

 

But this only happens when I change the timeframes. With all other scripts (change templates, plot a line etc.) I don't see any system message.

Do you have an idea what that means?

Here is my code:

void OnStart()
  {
//---
   int ChartPer = ChartPeriod();
   long prevChart, currChart = ChartFirst();
   int i = 0;
   while(i < CHARTS_MAX) {
//---
      ChartSetSymbolPeriod(currChart, ChartSymbol(currChart), ChartPer);
//---
      prevChart = currChart;
      currChart = ChartNext(prevChart);
      if(currChart < 0) break;
      i++;
   }
  }

 

avatar
Moderator
3206
angevoyageur 2015.01.12 22:07 #
 
mar:

I made a script to change all timeframes of the opened charts to the chart's timeframe the script is dragged into. That also works but I always get a system message:

 

But this only happens when I change the timeframes. With all other scripts (change templates, plot a line etc.) I don't see any system message.

Do you have an idea what that means?

Here is my code:

 

You are trying to change to timeframe of the current chart where the script is running.
avatar
372
mar 2015.01.13 00:41 #
 
Yes, of course!! Thank you!! Fixed it.
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