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CCheckGroup

CCheckGroup is a class of the CheckGroup complex control (with dependent controls).

Description

CCheckGroup provides the possibility for creation of controls, which allow to display and edit flags.

Declaration

   class CCheckGroup : public CWndClient

Title

   #include <Controls\CheckGroup.mqh>

Inheritance hierarchy

  CObject

      CWnd

          CWndContainer

              CWndClient

                  CCheckGroup

Result of the code provided below:

ControlsCheckGroup

Class Methods by Groups

Create

 

Create

Creates control

Chart event handlers

 

OnEvent

Event handler for all chart events

Add

 

AddItem

Adds new item

Read-only data

 

Value

Gets the value associated with the control

Dependent controls

 

CreateButton

Creates new CCheckBox item at a specified index

Dependent controls event handlers

 

OnVScrollShow

"Show" internal event handler (virtual) of VScroll dependent control

OnVScrollHide

"Hide" internal event handler (virtual) of VScroll dependent control

OnScrollLineDown

"ScrollLineUp" internal event handler (virtual) of VScroll dependent control

OnScrollLineUp

"ScrollLineDown" internal event handler (virtual) of VScroll dependent control

OnChangeItem

"ChangeItem" internal event handler (virtual) of VScroll dependent control

Redraw

 

Redraw

Redraws the group

RowState

Sets the state of the specified item of the group

Example of creating a panel with Checkbox group control:

//+------------------------------------------------------------------+
//|                                           ControlsCheckGroup.mq5 |
//|                        Copyright 2017, MetaQuotes Software Corp. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2017, MetaQuotes Software Corp."
#property link      "https://www.mql5.com"
#property version   "1.00"
#property description "Control Panels and Dialogs. Demonstration class CCheckGroup"
#include <Controls\Dialog.mqh>
#include <Controls\CheckGroup.mqh>
//+------------------------------------------------------------------+
//| defines                                                          |
//+------------------------------------------------------------------+
//--- indents and gaps
#define INDENT_LEFT                         (11)      // indent from left (with allowance for border width)
#define INDENT_TOP                          (11)      // indent from top (with allowance for border width)
#define INDENT_RIGHT                        (11)      // indent from right (with allowance for border width)
#define INDENT_BOTTOM                       (11)      // indent from bottom (with allowance for border width)
#define CONTROLS_GAP_X                      (5)       // gap by X coordinate
#define CONTROLS_GAP_Y                      (5)       // gap by Y coordinate
//--- for buttons
#define BUTTON_WIDTH                        (100)     // size by X coordinate
#define BUTTON_HEIGHT                       (20)      // size by Y coordinate
//--- for the indication area
#define EDIT_HEIGHT                         (20)      // size by Y coordinate
//--- for group controls
#define GROUP_WIDTH                         (150)     // size by X coordinate
#define LIST_HEIGHT                         (179)     // size by Y coordinate
#define RADIO_HEIGHT                        (56)      // size by Y coordinate
#define CHECK_HEIGHT                        (93)      // size by Y coordinate
//+------------------------------------------------------------------+
//| Class CControlsDialog                                            |
//| Usage: main dialog of the Controls application                   |
//+------------------------------------------------------------------+
class CControlsDialog : public CAppDialog
  {
private:
   CCheckGroup       m_check_group;                   // CCheckGroup object
 
public:
                     CControlsDialog(void);
                    ~CControlsDialog(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);
 
protected:
   //--- create dependent controls
   bool              CreateCheckGroup(void);
   //--- handlers of the dependent controls events
   void              OnChangeCheckGroup(void);
  };
//+------------------------------------------------------------------+
//| Event Handling                                                   |
//+------------------------------------------------------------------+
EVENT_MAP_BEGIN(CControlsDialog)
ON_EVENT(ON_CHANGE,m_check_group,OnChangeCheckGroup)
EVENT_MAP_END(CAppDialog)
//+------------------------------------------------------------------+
//| Constructor                                                      |
//+------------------------------------------------------------------+
CControlsDialog::CControlsDialog(void)
  {
  }
//+------------------------------------------------------------------+
//| Destructor                                                       |
//+------------------------------------------------------------------+
CControlsDialog::~CControlsDialog(void)
  {
  }
//+------------------------------------------------------------------+
//| Create                                                           |
//+------------------------------------------------------------------+
bool CControlsDialog::Create(const long chart,const string name,const int subwin,const int x1,const int y1,const int x2,const int y2)
  {
   if(!CAppDialog::Create(chart,name,subwin,x1,y1,x2,y2))
      return(false);
//--- create dependent controls
   if(!CreateCheckGroup())
      return(false);
//--- succeed
   return(true);
  }
//+------------------------------------------------------------------+
//| Create the "CheckGroup" element                                  |
//+------------------------------------------------------------------+
bool CControlsDialog::CreateCheckGroup(void)
  {
//--- coordinates
   int x1=INDENT_LEFT;
   int y1=INDENT_TOP+(EDIT_HEIGHT+CONTROLS_GAP_Y)+
          (BUTTON_HEIGHT+CONTROLS_GAP_Y)+
          (EDIT_HEIGHT+CONTROLS_GAP_Y)+
          (EDIT_HEIGHT+CONTROLS_GAP_Y)+
          (RADIO_HEIGHT+CONTROLS_GAP_Y);
   int x2=x1+GROUP_WIDTH;
   int y2=y1+CHECK_HEIGHT;
//--- create
   if(!m_check_group.Create(m_chart_id,m_name+"CheckGroup",m_subwin,x1,y1,x2,y2))
      return(false);
   if(!Add(m_check_group))
      return(false);
//--- fill out with strings
   for(int i=0;i<5;i++)
      if(!m_check_group.AddItem("Item "+IntegerToString(i),1<<i))
         return(false);
   m_check_group.Check(0,1<<0);
   m_check_group.Check(2,1<<2);
   Comment(__FUNCTION__+" : Value="+IntegerToString(m_check_group.Value()));
//--- succeed
   return(true);
  }
//+------------------------------------------------------------------+
//| Event handler                                                    |
//+------------------------------------------------------------------+
void CControlsDialog::OnChangeCheckGroup(void)
  {
   Comment(__FUNCTION__+" : Value="+IntegerToString(m_check_group.Value()));
  }
//+------------------------------------------------------------------+
//| Global Variables                                                 |
//+------------------------------------------------------------------+
CControlsDialog ExtDialog;
//+------------------------------------------------------------------+
//| Expert initialization function                                   |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- create application dialog
   if(!ExtDialog.Create(ChartID(),"Controls",0,40,40,380,344))
      return(INIT_FAILED);
//--- run application
   ExtDialog.Run();
//--- succeed
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Expert deinitialization function                                 |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
  {
//---
   Comment("");
//--- destroy dialog
   ExtDialog.Destroy(reason);
  }
//+------------------------------------------------------------------+
//| Expert chart event function                                      |
//+------------------------------------------------------------------+
void OnChartEvent(const int id,         // event ID  
                  const long& lparam,   // event parameter of the long type
                  const double& dparam, // event parameter of the double type
                  const string& sparam) // event parameter of the string type
  {
   ExtDialog.ChartEvent(id,lparam,dparam,sparam);
  }


Updated: 2017.03.22