[MQL5]全チャートの時間足を変更するショートカットを追加するスクリプト

//+------------------------------------------------------------------+
//|                                           AdditinalShortCuts.mq5 |
//|                                Copyright 2018, Shintaro Tanikawa |
//|                                                                  |
//+------------------------------------------------------------------+
#property copyright "Copyright 2018, Shintaro Tanikawa"

void OnChartEvent(const int id,
                  const long &lparam,
                  const double &dparam,
                  const string &sparam)
{
  if (id == CHARTEVENT_KEYDOWN)
  {
    ENUM_TIMEFRAMES timeframes = GetTimeFramesByKey(lparam);
    if (timeframes != -1)
    {
      long chartId = ChartFirst();
      for (int i = 0; i < CHARTS_MAX; ++i)
      {
        if (ChartPeriod(chartId) != timeframes)
        {
          ChartSetSymbolPeriod(chartId, ChartSymbol(chartId), timeframes);
        }
        chartId = ChartNext(chartId);
      }
    }

  }
}

ENUM_TIMEFRAMES GetTimeFramesByKey(const long &key)
{
  switch (key)
  {
    case 49: // Pressed Key 1
      return PERIOD_M1;
    case 50: // Pressed Key 2
      return PERIOD_M5;
    case 51: // Pressed Key 3
      return PERIOD_M15;
    case 52: // Pressed Key 4
      return PERIOD_M30;
    case 53: // Pressed Key 5
      return PERIOD_H1;
    case 54: // Pressed Key 6
      return PERIOD_H4;
    case 55: // Pressed Key 7
      return PERIOD_D1;
    case 56: // Pressed Key 8
      return PERIOD_W1;
    case 57:
      return PERIOD_MN1;
    default:
      return -1;
  }
}
//+------------------------------------------------------------------+