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Chart: Moves ChartStatic to separate .h file
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@kenorb
kenorb committed Sep 11, 2021
1 parent c1eb58c commit af44ef0
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Showing 2 changed files with 295 additions and 268 deletions.
269 changes: 1 addition & 268 deletions Chart.struct.h
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,7 @@ class Class;
#include "Bar.struct.h"
#include "Chart.define.h"
#include "Chart.enum.h"
#include "Chart.struct.static.h"
#include "Chart.struct.tf.h"
#include "Serializer.mqh"
#include "Terminal.define.h"
Expand Down Expand Up @@ -111,274 +112,6 @@ struct ChartParams {
SerializerNodeType Serialize(Serializer& s);
} chart_params_defaults(PERIOD_CURRENT, _Symbol);

/* Defines struct for chart static methods. */
struct ChartStatic {
/**
* Returns the number of bars on the specified chart.
*/
static int iBars(string _symbol = NULL, ENUM_TIMEFRAMES _tf = PERIOD_CURRENT) {
#ifdef __MQL4__
// In MQL4, for the current chart, the information about the amount of bars is in the Bars predefined variable.
return ::iBars(_symbol, _tf);
#else // _MQL5__
// ENUM_TIMEFRAMES _tf = MQL4::TFMigrate(_tf);
return ::Bars(_symbol, _tf);
#endif
}

/**
* Search for a bar by its time.
*
* Returns the index of the bar which covers the specified time.
*/
static int iBarShift(string _symbol, ENUM_TIMEFRAMES _tf, datetime _time, bool _exact = false) {
#ifdef __MQL4__
return ::iBarShift(_symbol, _tf, _time, _exact);
#else // __MQL5__
if (_time < 0) return (-1);
ARRAY(datetime, arr);
datetime _time0;
// ENUM_TIMEFRAMES _tf = MQL4::TFMigrate(_tf);
CopyTime(_symbol, _tf, 0, 1, arr);
_time0 = arr[0];
if (CopyTime(_symbol, _tf, _time, _time0, arr) > 0) {
if (ArraySize(arr) > 2) {
return ArraySize(arr) - 1;
} else {
return _time < _time0 ? 1 : 0;
}
} else {
return -1;
}
#endif
}

/**
* Returns close price value for the bar of indicated symbol.
*
* If local history is empty (not loaded), function returns 0.
*
* @see http://docs.mql4.com/series/iclose
*/
static double iClose(string _symbol = NULL, ENUM_TIMEFRAMES _tf = PERIOD_CURRENT, int _shift = 0) {
#ifdef __MQL4__
return ::iClose(_symbol, _tf, _shift); // Same as: Close[_shift]
#else // __MQL5__
ARRAY(double, _arr);
ArraySetAsSeries(_arr, true);
return (_shift >= 0 && CopyClose(_symbol, _tf, _shift, 1, _arr) > 0) ? _arr[0] : -1;
#endif
}

/**
* Returns low price value for the bar of indicated symbol.
*
* If local history is empty (not loaded), function returns 0.
*/
static double iHigh(string _symbol = NULL, ENUM_TIMEFRAMES _tf = PERIOD_CURRENT, uint _shift = 0) {
#ifdef __MQL4__
return ::iHigh(_symbol, _tf, _shift); // Same as: High[_shift]
#else // __MQL5__
ARRAY(double, _arr);
ArraySetAsSeries(_arr, true);
return (_shift >= 0 && CopyHigh(_symbol, _tf, _shift, 1, _arr) > 0) ? _arr[0] : -1;
#endif
}

/**
* Returns the shift of the maximum value over a specific number of periods depending on type.
*/
static int iHighest(string _symbol = NULL, ENUM_TIMEFRAMES _tf = PERIOD_CURRENT, int _type = MODE_HIGH,
uint _count = WHOLE_ARRAY, int _start = 0) {
#ifdef __MQL4__
return ::iHighest(_symbol, _tf, _type, _count, _start);
#else // __MQL5__
if (_start < 0) return (-1);
_count = (_count <= 0 ? ChartStatic::iBars(_symbol, _tf) : _count);
ARRAY(double, arr_d);
ARRAY(long, arr_l);
ARRAY(datetime, arr_dt);
ArraySetAsSeries(arr_d, true);
switch (_type) {
case MODE_OPEN:
CopyOpen(_symbol, _tf, _start, _count, arr_d);
break;
case MODE_LOW:
CopyLow(_symbol, _tf, _start, _count, arr_d);
break;
case MODE_HIGH:
CopyHigh(_symbol, _tf, _start, _count, arr_d);
break;
case MODE_CLOSE:
CopyClose(_symbol, _tf, _start, _count, arr_d);
break;
case MODE_VOLUME:
ArraySetAsSeries(arr_l, true);
CopyTickVolume(_symbol, _tf, _start, _count, arr_l);
return (ArrayMaximum(arr_l, 0, _count) + _start);
case MODE_TIME:
ArraySetAsSeries(arr_dt, true);
CopyTime(_symbol, _tf, _start, _count, arr_dt);
return (ArrayMaximum(arr_dt, 0, _count) + _start);
default:
break;
}
return (ArrayMaximum(arr_d, 0, _count) + _start);
#endif
}

/**
* Returns low price value for the bar of indicated symbol.
*
* If local history is empty (not loaded), function returns 0.
*/
static double iLow(string _symbol = NULL, ENUM_TIMEFRAMES _tf = PERIOD_CURRENT, uint _shift = 0) {
#ifdef __MQL4__
return ::iLow(_symbol, _tf, _shift); // Same as: Low[_shift]
#else // __MQL5__
ARRAY(double, _arr);
ArraySetAsSeries(_arr, true);
return (_shift >= 0 && CopyLow(_symbol, _tf, _shift, 1, _arr) > 0) ? _arr[0] : -1;
#endif
}

/**
* Returns the shift of the lowest value over a specific number of periods depending on type.
*/
static int iLowest(string _symbol = NULL, ENUM_TIMEFRAMES _tf = PERIOD_CURRENT, int _type = MODE_LOW,
unsigned int _count = WHOLE_ARRAY, int _start = 0) {
#ifdef __MQL4__
return ::iLowest(_symbol, _tf, _type, _count, _start);
#else // __MQL5__
if (_start < 0) return (-1);
_count = (_count <= 0 ? iBars(_symbol, _tf) : _count);
ARRAY(double, arr_d);
ARRAY(long, arr_l);
ARRAY(datetime, arr_dt);
ArraySetAsSeries(arr_d, true);
switch (_type) {
case MODE_OPEN:
CopyOpen(_symbol, _tf, _start, _count, arr_d);
break;
case MODE_LOW:
CopyLow(_symbol, _tf, _start, _count, arr_d);
break;
case MODE_HIGH:
CopyHigh(_symbol, _tf, _start, _count, arr_d);
break;
case MODE_CLOSE:
CopyClose(_symbol, _tf, _start, _count, arr_d);
break;
case MODE_VOLUME:
ArraySetAsSeries(arr_l, true);
CopyTickVolume(_symbol, _tf, _start, _count, arr_l);
return (ArrayMinimum(arr_l, 0, _count) + _start);
case MODE_TIME:
ArraySetAsSeries(arr_dt, true);
CopyTime(_symbol, _tf, _start, _count, arr_dt);
return (ArrayMinimum(arr_dt, 0, _count) + _start);
default:
break;
}
return (ArrayMinimum(arr_d, 0, _count) + _start);
#endif
}

/**
* Returns open price value for the bar of indicated symbol.
*
* If local history is empty (not loaded), function returns 0.
*/
static double iOpen(string _symbol = NULL, ENUM_TIMEFRAMES _tf = PERIOD_CURRENT, uint _shift = 0) {
#ifdef __MQL4__
return ::iOpen(_symbol, _tf, _shift); // Same as: Open[_shift]
#else // __MQL5__
ARRAY(double, _arr);
ArraySetAsSeries(_arr, true);
return (_shift >= 0 && CopyOpen(_symbol, _tf, _shift, 1, _arr) > 0) ? _arr[0] : -1;
#endif
}

/**
* Returns the current price value given applied price type.
*/
static double iPrice(ENUM_APPLIED_PRICE _ap, string _symbol = NULL, ENUM_TIMEFRAMES _tf = PERIOD_CURRENT,
int _shift = 0) {
double _result = EMPTY_VALUE;
switch (_ap) {
// Close price.
case PRICE_CLOSE:
_result = ChartStatic::iClose(_symbol, _tf, _shift);
break;
// Open price.
case PRICE_OPEN:
_result = ChartStatic::iOpen(_symbol, _tf, _shift);
break;
// The maximum price for the period.
case PRICE_HIGH:
_result = ChartStatic::iHigh(_symbol, _tf, _shift);
break;
// The minimum price for the period.
case PRICE_LOW:
_result = ChartStatic::iLow(_symbol, _tf, _shift);
break;
// Median price: (high + low)/2.
case PRICE_MEDIAN:
_result = (ChartStatic::iHigh(_symbol, _tf, _shift) + ChartStatic::iLow(_symbol, _tf, _shift)) / 2;
break;
// Typical price: (high + low + close)/3.
case PRICE_TYPICAL:
_result = (ChartStatic::iHigh(_symbol, _tf, _shift) + ChartStatic::iLow(_symbol, _tf, _shift) +
ChartStatic::iClose(_symbol, _tf, _shift)) /
3;
break;
// Weighted close price: (high + low + close + close)/4.
case PRICE_WEIGHTED:
_result = (ChartStatic::iHigh(_symbol, _tf, _shift) + ChartStatic::iLow(_symbol, _tf, _shift) +
ChartStatic::iClose(_symbol, _tf, _shift) + ChartStatic::iClose(_symbol, _tf, _shift)) /
4;
break;
}
return _result;
}

/**
* Returns open time price value for the bar of indicated symbol.
*
* If local history is empty (not loaded), function returns 0.
*/
static datetime iTime(string _symbol = NULL, ENUM_TIMEFRAMES _tf = PERIOD_CURRENT, uint _shift = 0) {
#ifdef __MQL4__
return ::iTime(_symbol, _tf, _shift); // Same as: Time[_shift]
#else // __MQL5__
ARRAY(datetime, _arr);
// ENUM_TIMEFRAMES _tf = MQL4::TFMigrate(_tf);
// @todo: Improves performance by caching values.
return (_shift >= 0 && ::CopyTime(_symbol, _tf, _shift, 1, _arr) > 0) ? _arr[0] : -1;
#endif
}

/**
* Returns tick volume value for the bar.
*
* If local history is empty (not loaded), function returns 0.
*/
static long iVolume(string _symbol = NULL, ENUM_TIMEFRAMES _tf = PERIOD_CURRENT, uint _shift = 0) {
#ifdef __MQL4__
return ::iVolume(_symbol, _tf, _shift); // Same as: Volume[_shift]
#else // __MQL5__
ARRAY(long, _arr);
ArraySetAsSeries(_arr, true);
return (_shift >= 0 && CopyTickVolume(_symbol, _tf, _shift, 1, _arr) > 0) ? _arr[0] : -1;
#endif
}

/**
* Gets Chart ID.
*/
static long ID() { return ::ChartID(); }
};

/**
* Wrapper struct that returns close prices of each bar of the current chart.
*
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