//+------------------------------------------------------------------+ //| SpinEdit.mqh | //| Copyright 2009-2017, MetaQuotes Software Corp. | //| http://www.mql5.com | //+------------------------------------------------------------------+ #include "WndContainer.mqh" #include "Edit.mqh" #include "BmpButton.mqh" //+------------------------------------------------------------------+ //| Resources | //+------------------------------------------------------------------+ #resource "res\\SpinInc.bmp" #resource "res\\SpinDec.bmp" //+------------------------------------------------------------------+ //| Class CSpinEdit | //| Usage: class that implements the "Up-Down" control | //+------------------------------------------------------------------+ class CSpinEdit : public CWndContainer { private: //--- dependent controls CEdit m_edit; // the entry field object CBmpButton m_inc; // the "Increment button" object CBmpButton m_dec; // the "Decrement button" object //--- adjusted parameters int m_min_value; // minimum value int m_max_value; // maximum value //--- state int m_value; // current value public: CSpinEdit(void); ~CSpinEdit(void); //--- create virtual bool Create(const long chart,const string name,const int subwin,const int x1,const int y1,const int x2,const int y2); //--- chart event handler virtual bool OnEvent(const int id,const long &lparam,const double &dparam,const string &sparam); //--- set up int MinValue(void) const { return(m_min_value); } void MinValue(const int value); int MaxValue(void) const { return(m_max_value); } void MaxValue(const int value); //--- state int Value(void) const { return(m_value); } bool Value(int value); //--- methods for working with files virtual bool Save(const int file_handle); virtual bool Load(const int file_handle); protected: //--- create dependent controls virtual bool CreateEdit(void); virtual bool CreateInc(void); virtual bool CreateDec(void); //--- handlers of the dependent controls events virtual bool OnClickInc(void); virtual bool OnClickDec(void); //--- internal event handlers virtual bool OnChangeValue(void); }; //+------------------------------------------------------------------+ //| Common handler of chart events | //+------------------------------------------------------------------+ EVENT_MAP_BEGIN(CSpinEdit) ON_EVENT(ON_CLICK,m_inc,OnClickInc) ON_EVENT(ON_CLICK,m_dec,OnClickDec) EVENT_MAP_END(CWndContainer) //+------------------------------------------------------------------+ //| Constructor | //+------------------------------------------------------------------+ CSpinEdit::CSpinEdit(void) : m_min_value(0), m_max_value(0), m_value(0) { } //+------------------------------------------------------------------+ //| Destructor | //+------------------------------------------------------------------+ CSpinEdit::~CSpinEdit(void) { } //+------------------------------------------------------------------+ //| Create a control | //+------------------------------------------------------------------+ bool CSpinEdit::Create(const long chart,const string name,const int subwin,const int x1,const int y1,const int x2,const int y2) { //--- check height if(y2-y1m_max_value) value=m_max_value; //--- if value was changed if(m_value!=value) { m_value=value; //--- call virtual handler return(OnChangeValue()); } //--- value has not been changed return(false); } //+------------------------------------------------------------------+ //| | //+------------------------------------------------------------------+ bool CSpinEdit::Save(const int file_handle) { //--- check if(file_handle==INVALID_HANDLE) return(false); //--- FileWriteInteger(file_handle,m_value); //--- succeed return(true); } //+------------------------------------------------------------------+ //| | //+------------------------------------------------------------------+ bool CSpinEdit::Load(const int file_handle) { //--- check if(file_handle==INVALID_HANDLE) return(false); //--- if(!FileIsEnding(file_handle)) Value(FileReadInteger(file_handle)); //--- succeed return(true); } //+------------------------------------------------------------------+ //| Set minimum value | //+------------------------------------------------------------------+ void CSpinEdit::MinValue(const int value) { //--- if value was changed if(m_min_value!=value) { m_min_value=value; //--- adjust the edit value Value(m_value); } } //+------------------------------------------------------------------+ //| Set maximum value | //+------------------------------------------------------------------+ void CSpinEdit::MaxValue(const int value) { //--- if value was changed if(m_max_value!=value) { m_max_value=value; //--- adjust the edit value Value(m_value); } } //+------------------------------------------------------------------+ //| Create the edit field | //+------------------------------------------------------------------+ bool CSpinEdit::CreateEdit(void) { //--- create if(!m_edit.Create(m_chart_id,m_name+"Edit",m_subwin,0,0,Width(),Height())) return(false); if(!m_edit.Text("")) return(false); if(!m_edit.ReadOnly(true)) return(false); if(!Add(m_edit)) return(false); //--- succeed return(true); } //+------------------------------------------------------------------+ //| Create the "Increment" button | //+------------------------------------------------------------------+ bool CSpinEdit::CreateInc(void) { //--- right align button (try to make equal offsets from top and bottom) int x1=Width()-(CONTROLS_BUTTON_SIZE+CONTROLS_SPIN_BUTTON_X_OFF); int y1=(Height()-2*CONTROLS_SPIN_BUTTON_SIZE)/2; int x2=x1+CONTROLS_BUTTON_SIZE; int y2=y1+CONTROLS_SPIN_BUTTON_SIZE; //--- create if(!m_inc.Create(m_chart_id,m_name+"Inc",m_subwin,x1,y1,x2,y2)) return(false); if(!m_inc.BmpNames("::res\\SpinInc.bmp")) return(false); if(!Add(m_inc)) return(false); //--- property m_inc.PropFlags(WND_PROP_FLAG_CLICKS_BY_PRESS); //--- succeed return(true); } //+------------------------------------------------------------------+ //| Create the "Decrement" button | //+------------------------------------------------------------------+ bool CSpinEdit::CreateDec(void) { //--- right align button (try to make equal offsets from top and bottom) int x1=Width()-(CONTROLS_BUTTON_SIZE+CONTROLS_SPIN_BUTTON_X_OFF); int y1=(Height()-2*CONTROLS_SPIN_BUTTON_SIZE)/2+CONTROLS_SPIN_BUTTON_SIZE; int x2=x1+CONTROLS_BUTTON_SIZE; int y2=y1+CONTROLS_SPIN_BUTTON_SIZE; //--- create if(!m_dec.Create(m_chart_id,m_name+"Dec",m_subwin,x1,y1,x2,y2)) return(false); if(!m_dec.BmpNames("::res\\SpinDec.bmp")) return(false); if(!Add(m_dec)) return(false); //--- property m_dec.PropFlags(WND_PROP_FLAG_CLICKS_BY_PRESS); //--- succeed return(true); } //+------------------------------------------------------------------+ //| Handler of click on the "increment" button | //+------------------------------------------------------------------+ bool CSpinEdit::OnClickInc(void) { //--- try to increment current value return(Value(m_value+1)); } //+------------------------------------------------------------------+ //| Handler of click on the "decrement" button | //+------------------------------------------------------------------+ bool CSpinEdit::OnClickDec(void) { //--- try to decrement current value return(Value(m_value-1)); } //+------------------------------------------------------------------+ //| Handler of changing current state | //+------------------------------------------------------------------+ bool CSpinEdit::OnChangeValue(void) { //--- copy text to the edit field edit m_edit.Text(IntegerToString(m_value)); //--- send notification EventChartCustom(INTERNAL_EVENT,ON_CHANGE,m_id,0.0,m_name); //--- handled return(true); } //+------------------------------------------------------------------+