289 lines
12 KiB
MQL5
289 lines
12 KiB
MQL5
//+------------------------------------------------------------------+
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//| SpinEditDouble.mqh |
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//| Copyright 2009-2017, MetaQuotes Software Corp. |
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//| http://www.mql5.com |
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//+------------------------------------------------------------------+
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#property copyright "Copyright 2018, Amr Ali"
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#property link "https://www.mql5.com/en/users/amrali"
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#property version "1.00"
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#property description "CSpinEditDouble class is intended for creation of a control, which allows editing a value of double type with a specified step and within specified limitations."
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//+------------------------------------------------------------------+
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//| |
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//+------------------------------------------------------------------+
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#include <Controls\WndContainer.mqh>
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#include <Controls\Edit.mqh>
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#include <Controls\BmpButton.mqh>
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//+------------------------------------------------------------------+
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//| Resources |
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//+------------------------------------------------------------------+
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#resource "\\Include\\Controls\\res\\SpinInc.bmp"
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#resource "\\Include\\Controls\\res\\SpinDec.bmp"
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//+------------------------------------------------------------------+
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//| Class CSpinEditDouble |
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//| Usage: class that implements the "Up-Down" control |
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//+------------------------------------------------------------------+
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class CSpinEditDouble : public CWndContainer
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{
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private:
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//--- dependent controls
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CEdit m_edit; // the entry field object
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CBmpButton m_inc; // the "Increment button" object
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CBmpButton m_dec; // the "Decrement button" object
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//--- adjusted parameters
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double m_min_value; // minimum value
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double m_max_value; // maximum value
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double m_step_value; // stepping value
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int m_digits; // rounding digits
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//--- state
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double m_value; // current value
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public:
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CSpinEditDouble(void);
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~CSpinEditDouble(void);
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//--- create
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virtual bool Create(const long chart,const string name,const int subwin,const int x1,const int y1,const int x2,const int y2);
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//--- chart event handler
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virtual bool OnEvent(const int id,const long &lparam,const double &dparam,const string &sparam);
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//--- pointer of the edit object
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CEdit *GetEditPointer(void) { return(::GetPointer(m_edit)); }
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//--- set up
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void SetParameters(double value,double min,double max,double step,int digits);
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double MinValue(void) const { return(m_min_value); }
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void MinValue(const double value);
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double MaxValue(void) const { return(m_max_value); }
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void MaxValue(const double value);
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double StepValue(void) const { return(m_step_value); }
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void StepValue(const double step) { m_step_value=step; }
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int Digits(void) const { return(m_digits); }
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void Digits(const int digits) { m_digits=digits; }
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//--- state
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double Value(void) const { return(m_value); }
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bool Value(double value);
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//--- methods for working with files
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virtual bool Save(const int file_handle);
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virtual bool Load(const int file_handle);
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protected:
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//--- create dependent controls
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virtual bool CreateEdit(void);
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virtual bool CreateInc(void);
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virtual bool CreateDec(void);
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//--- handlers of the dependent controls events
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virtual bool OnClickInc(void);
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virtual bool OnClickDec(void);
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virtual bool OnChangeValue(void);
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};
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//+------------------------------------------------------------------+
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//| Common handler of chart events |
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//+------------------------------------------------------------------+
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EVENT_MAP_BEGIN(CSpinEditDouble)
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ON_EVENT(ON_CLICK,m_inc,OnClickInc)
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ON_EVENT(ON_CLICK,m_dec,OnClickDec)
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ON_EVENT(ON_END_EDIT,m_edit,OnChangeValue)
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EVENT_MAP_END(CWndContainer)
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//+------------------------------------------------------------------+
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//| Constructor |
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//+------------------------------------------------------------------+
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CSpinEditDouble::CSpinEditDouble(void) : m_min_value(-DBL_MAX),
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m_max_value(DBL_MAX),
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m_value(0.0),
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m_step_value(1.0),
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m_digits(0)
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{
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}
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//+------------------------------------------------------------------+
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//| Destructor |
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//+------------------------------------------------------------------+
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CSpinEditDouble::~CSpinEditDouble(void)
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{
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}
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//+------------------------------------------------------------------+
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//| Create a control |
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//+------------------------------------------------------------------+
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bool CSpinEditDouble::Create(const long chart,const string name,const int subwin,const int x1,const int y1,const int x2,const int y2)
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{
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//--- check height
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if(y2-y1<CONTROLS_SPIN_MIN_HEIGHT)
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return(false);
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//--- call method of the parent class
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if(!CWndContainer::Create(chart,name,subwin,x1,y1,x2,y2))
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return(false);
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//--- create dependent controls
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if(!CreateEdit())
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return(false);
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if(!CreateInc())
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return(false);
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if(!CreateDec())
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return(false);
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//--- succeed
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return(true);
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}
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//+------------------------------------------------------------------+
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//| |
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//+------------------------------------------------------------------+
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void CSpinEditDouble::SetParameters(double value,double min,double max,double step,int digits)
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{
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Digits(digits);
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StepValue(step);
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MaxValue(max);
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MinValue(min);
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Value(value);
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}
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//+------------------------------------------------------------------+
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//| Set current value |
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//+------------------------------------------------------------------+
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bool CSpinEditDouble::Value(double value)
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{
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//--- check value
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if(value<m_min_value)
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value=m_min_value;
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if(value>m_max_value)
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value=m_max_value;
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//--- change the current value
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m_value=value;
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//--- copy text to the edit field edit
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m_edit.Text(DoubleToString(m_value,m_digits));
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//--- send notification
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EventChartCustom(CONTROLS_SELF_MESSAGE,ON_CHANGE,m_id,0.0,m_name);
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//--- succeed
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return(true);
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}
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//+------------------------------------------------------------------+
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//| |
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//+------------------------------------------------------------------+
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bool CSpinEditDouble::Save(const int file_handle)
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{
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//--- check
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if(file_handle==INVALID_HANDLE)
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return(false);
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//---
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FileWriteDouble(file_handle,m_value);
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//--- succeed
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return(true);
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}
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//+------------------------------------------------------------------+
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//| |
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//+------------------------------------------------------------------+
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bool CSpinEditDouble::Load(const int file_handle)
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{
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//--- check
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if(file_handle==INVALID_HANDLE)
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return(false);
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//---
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if(!FileIsEnding(file_handle))
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Value(FileReadDouble(file_handle));
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//--- succeed
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return(true);
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}
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//+------------------------------------------------------------------+
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//| Set minimum value |
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//+------------------------------------------------------------------+
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void CSpinEditDouble::MinValue(const double value)
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{
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//--- if value was changed
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if(m_min_value!=value)
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{
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m_min_value=value;
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//--- adjust the edit value
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Value(m_value);
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}
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}
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//+------------------------------------------------------------------+
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//| Set maximum value |
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//+------------------------------------------------------------------+
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void CSpinEditDouble::MaxValue(const double value)
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{
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//--- if value was changed
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if(m_max_value!=value)
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{
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m_max_value=value;
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//--- adjust the edit value
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Value(m_value);
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}
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}
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//+------------------------------------------------------------------+
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//| Create the edit field |
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//+------------------------------------------------------------------+
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bool CSpinEditDouble::CreateEdit(void)
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{
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//--- create
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if(!m_edit.Create(m_chart_id,m_name+"Edit",m_subwin,0,0,Width(),Height()))
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return(false);
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if(!m_edit.Text(""))
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return(false);
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if(!m_edit.ReadOnly(false))
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return(false);
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if(!Add(m_edit))
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return(false);
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//--- succeed
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return(true);
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}
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//+------------------------------------------------------------------+
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//| Create the "Increment" button |
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//+------------------------------------------------------------------+
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bool CSpinEditDouble::CreateInc(void)
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{
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//--- right align button (try to make equal offsets from top and bottom)
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int x1=Width()-(CONTROLS_BUTTON_SIZE+CONTROLS_SPIN_BUTTON_X_OFF);
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int y1=(Height()-2*CONTROLS_SPIN_BUTTON_SIZE)/2;
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int x2=x1+CONTROLS_BUTTON_SIZE;
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int y2=y1+CONTROLS_SPIN_BUTTON_SIZE;
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//--- create
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if(!m_inc.Create(m_chart_id,m_name+"Inc",m_subwin,x1,y1,x2,y2))
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return(false);
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if(!m_inc.BmpNames("::Include\\Controls\\res\\SpinInc.bmp"))
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return(false);
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if(!Add(m_inc))
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return(false);
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//--- property
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m_inc.PropFlags(WND_PROP_FLAG_CLICKS_BY_PRESS);
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//--- succeed
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return(true);
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}
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//+------------------------------------------------------------------+
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//| Create the "Decrement" button |
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//+------------------------------------------------------------------+
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bool CSpinEditDouble::CreateDec(void)
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{
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//--- right align button (try to make equal offsets from top and bottom)
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int x1=Width()-(CONTROLS_BUTTON_SIZE+CONTROLS_SPIN_BUTTON_X_OFF);
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int y1=(Height()-2*CONTROLS_SPIN_BUTTON_SIZE)/2+CONTROLS_SPIN_BUTTON_SIZE;
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int x2=x1+CONTROLS_BUTTON_SIZE;
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int y2=y1+CONTROLS_SPIN_BUTTON_SIZE;
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//--- create
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if(!m_dec.Create(m_chart_id,m_name+"Dec",m_subwin,x1,y1,x2,y2))
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return(false);
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if(!m_dec.BmpNames("::Include\\Controls\\res\\SpinDec.bmp"))
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return(false);
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if(!Add(m_dec))
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return(false);
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//--- property
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m_dec.PropFlags(WND_PROP_FLAG_CLICKS_BY_PRESS);
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//--- succeed
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return(true);
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}
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//+------------------------------------------------------------------+
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//| Handler of click on the "increment" button |
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//+------------------------------------------------------------------+
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bool CSpinEditDouble::OnClickInc(void)
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{
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//--- try to increment current value
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return(Value(StringToDouble(DoubleToString(m_value+m_step_value,m_digits))));
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}
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//+------------------------------------------------------------------+
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//| Handler of click on the "decrement" button |
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//+------------------------------------------------------------------+
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bool CSpinEditDouble::OnClickDec(void)
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{
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//--- try to decrement current value
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return(Value(StringToDouble(DoubleToString(m_value-m_step_value,m_digits))));
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}
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//+------------------------------------------------------------------+
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//| Handler of changing current state |
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//+------------------------------------------------------------------+
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bool CSpinEditDouble::OnChangeValue(void)
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{
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//--- try to change current value
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return(Value(StringToDouble(m_edit.Text())));
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}
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//+------------------------------------------------------------------+
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