257 lines
20 KiB
Plaintext
257 lines
20 KiB
Plaintext
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//+------------------------------------------------------------------+
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//| Indicators.mqh |
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//| Copyright 2017, Vasiliy Sokolov. |
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//| http://www.mql5.com |
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//+------------------------------------------------------------------+
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#property copyright "Copyright 2017, Vasiliy Sokolov."
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#property link "http://www.mql5.com"
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#include "Message.mqh"
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#include "Logs.mqh"
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//+------------------------------------------------------------------+
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//| Indicator base class |
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//+------------------------------------------------------------------+
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class CUnIndicator
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{
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private:
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MqlParam m_params[];
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int m_params_count;
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int m_current_buffer;
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int m_handle;
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static CLog* Log;
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bool m_invalid_handle;
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void PushName(string name);
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public:
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CUnIndicator(void);
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void SetBuffer(int index);
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template <typename T>
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bool SetParameter(T value);
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int Create(string symbol, ENUM_TIMEFRAMES period, string name);
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int Create(string symbol, ENUM_TIMEFRAMES period, string name, int app_price);
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int Create(string symbol, ENUM_TIMEFRAMES period, ENUM_INDICATOR ind_type);
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int Create(string symbol, ENUM_TIMEFRAMES period, ENUM_INDICATOR ind_type, int app_price);
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void InitByHandle(int handle);
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void IndicatorRelease(void);
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double operator[](int index);
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double operator[](datetime time);
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int GetHandle(void);
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};
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CLog *CUnIndicator::Log;
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//+------------------------------------------------------------------+
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//| Initialization without specifying the name |
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//+------------------------------------------------------------------+
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CUnIndicator::CUnIndicator(void) : m_params_count(0),
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m_handle(INVALID_HANDLE),
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m_current_buffer(0),
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m_invalid_handle(false)
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{
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//ArrayResize(m_params, 1);
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//m_params[0].type = TYPE_STRING;
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Log = CLog::GetLog();
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}
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//+------------------------------------------------------------------+
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//| Indicator deinitialization |
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//+------------------------------------------------------------------+
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CUnIndicator::IndicatorRelease(void)
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{
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if(m_handle != INVALID_HANDLE)
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IndicatorRelease(m_handle);
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ArrayResize(m_params, 1);
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m_params_count = 1;
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m_current_buffer = 0;
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m_handle = INVALID_HANDLE;
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}
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template <typename T>
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bool CUnIndicator::SetParameter(T value)
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{
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string type = typename(value);
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MqlParam param;
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if(type == "string")
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{
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param.type = TYPE_STRING;
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param.string_value = (string)value;
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}
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else if(type == "int")
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{
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param.type = TYPE_INT;
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param.integer_value = (long)value;
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}
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else if(type == "double")
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{
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param.type = TYPE_DOUBLE;
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param.double_value = (double)value;
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}
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else if(type == "bool")
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{
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param.type = TYPE_BOOL;
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param.integer_value = (int)value;
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}
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else if(type == "datetime")
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{
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param.type = TYPE_DATETIME;
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param.integer_value = (datetime)value;
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}
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else if(type == "color")
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{
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param.type = TYPE_COLOR;
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param.integer_value = (color)value;
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}
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else if(type == "ulong")
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{
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param.type = TYPE_ULONG;
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param.integer_value = (long)value;
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}
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else if(type == "uint")
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{
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param.type = TYPE_UINT;
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param.integer_value = (uint)value;
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}
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else
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{
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param.type = TYPE_INT;
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param.integer_value = (int)value;
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}
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m_params_count++;
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if(ArraySize(m_params) < m_params_count)
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ArrayResize(m_params, m_params_count);
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m_params[m_params_count-1].double_value = param.double_value;
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m_params[m_params_count-1].integer_value = param.integer_value;
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m_params[m_params_count-1].string_value = param.string_value;
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m_params[m_params_count-1].type = param.type;
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return true;
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}
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//+------------------------------------------------------------------+
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//| Returns the indicator handle |
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//+------------------------------------------------------------------+
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int CUnIndicator::GetHandle(void)
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{
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return m_handle;
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}
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//+------------------------------------------------------------------+
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//| Sets the current indicator buffer |
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//+------------------------------------------------------------------+
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void CUnIndicator::SetBuffer(int index)
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{
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m_current_buffer = index;
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}
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//+------------------------------------------------------------------+
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//| Initialize the indicator (create its handle). Returns the handle |
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//| of indicator if successful, otherwise INVALID_HANDLE if the |
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//| indicator creation failed |
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//+------------------------------------------------------------------+
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int CUnIndicator::Create(string symbol, ENUM_TIMEFRAMES period, string name)
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{
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PushName(name);
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m_handle = IndicatorCreate(symbol, period, IND_CUSTOM, m_params_count, m_params);
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if(m_handle == INVALID_HANDLE && m_invalid_handle == false)
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{
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string text = "CUnIndicator '" + m_params[0].string_value + "' was not created. Check its params. Last error:" + (string)GetLastError();
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CMessage* msg = new CMessage(MESSAGE_ERROR, __FUNCTION__, text);
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Log.AddMessage(msg);
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m_invalid_handle = true;
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}
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return m_handle;
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}
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//+------------------------------------------------------------------+
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//| Initialize the indicator (create its handle). Returns the handle |
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//| of indicator if successful, otherwise INVALID_HANDLE if the |
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//| indicator creation failed |
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//+------------------------------------------------------------------+
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int CUnIndicator::Create(string symbol, ENUM_TIMEFRAMES period, ENUM_INDICATOR ind_type)
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{
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if(ind_type == IND_CUSTOM)
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{
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string text = "CUnIndicator '" + m_params[0].string_value + "' was not created. Indicator type can not be IND_CUSTOM";
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CMessage* msg = new CMessage(MESSAGE_ERROR, __FUNCTION__, text);
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Log.AddMessage(msg);
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m_invalid_handle = true;
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return INVALID_HANDLE;
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}
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m_handle = IndicatorCreate(symbol, period, ind_type, m_params_count, m_params);
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if(m_handle == INVALID_HANDLE && m_invalid_handle == false)
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{
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string text = "CUnIndicator '" + m_params[0].string_value + "' was not created. Check its params. Last error:" + (string)GetLastError();
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CMessage* msg = new CMessage(MESSAGE_ERROR, __FUNCTION__, text);
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Log.AddMessage(msg);
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m_invalid_handle = true;
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}
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return m_handle;
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}
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//+------------------------------------------------------------------+
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//| Initialize the indicator (create its handle). Returns the handle |
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//| of indicator if successful, otherwise INVALID_HANDLE if the |
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//| indicator creation failed |
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//+------------------------------------------------------------------+
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int CUnIndicator::Create(string symbol,ENUM_TIMEFRAMES period,ENUM_INDICATOR ind_type,int app_price)
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{
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SetParameter(app_price);
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return Create(symbol, period, ind_type);
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}
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//+------------------------------------------------------------------+
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//| Places the indicator name at the zero index of m_params[] array |
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//+------------------------------------------------------------------+
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void CUnIndicator::PushName(string name)
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{
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int old_size = ArraySize(m_params);
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int size = ArrayResize(m_params, ArraySize(m_params) + 1);
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for(int i = 0; i < old_size; i++)
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m_params[i+1] = m_params[i];
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m_params[0].type = TYPE_STRING;
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m_params[0].string_value = name;
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}
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//+------------------------------------------------------------------+
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//| Initialize the indicator (create its handle). Returns the handle |
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//| of indicator if successful, otherwise INVALID_HANDLE if the |
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//| indicator creation failed |
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//+------------------------------------------------------------------+
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int CUnIndicator::Create(string symbol, ENUM_TIMEFRAMES period, string name, int app_price)
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{
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SetParameter(app_price);
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return Create(symbol, period, name);
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}
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//+------------------------------------------------------------------+
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//| Initializes an indicator class based on an existing |
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//| indicator handle |
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//+------------------------------------------------------------------+
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void CUnIndicator::InitByHandle(int handle)
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{
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this.IndicatorRelease();
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m_handle = handle;
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}
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//+------------------------------------------------------------------+
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//| Returns the indicator value based on 'index' |
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//+------------------------------------------------------------------+
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double CUnIndicator::operator[](int index)
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{
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double values[];
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if(m_handle == INVALID_HANDLE)
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return EMPTY_VALUE;
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if(CopyBuffer(m_handle, m_current_buffer, index, 1, values) == 0)
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{
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string text = "Failed copy buffer of indicator. Last error: " + (string)GetLastError();
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CMessage* msg = new CMessage(MESSAGE_ERROR, __FUNCTION__, text);
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Log.AddMessage(msg);
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return EMPTY_VALUE;
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}
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return values[0];
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}
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//+------------------------------------------------------------------+
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//| Returns the indicator value based on 'time' |
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//+------------------------------------------------------------------+
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double CUnIndicator::operator[](datetime time)
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{
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double values[];
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if(m_handle == INVALID_HANDLE)
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return EMPTY_VALUE;
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if(CopyBuffer(m_handle, m_current_buffer, time, 1, values) == 0)
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{
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string text = "Failed copy buffer of indicator. Last error: " + (string)GetLastError();
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CMessage* msg = new CMessage(MESSAGE_ERROR, __FUNCTION__, text);
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Log.AddMessage(msg);
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return EMPTY_VALUE;
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}
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return values[0];
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}�
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