//+------------------------------------------------------------------+
//|                                                     CheckBox.mqh |
//|                                  Copyright 2022, MetaQuotes Ltd. |
//|                             https://mql5.com/en/users/artmedia70 |
//+------------------------------------------------------------------+
#property copyright "Copyright 2022, MetaQuotes Ltd."
#property link      "https://mql5.com/en/users/artmedia70"
#property version   "1.00"
#property strict    // Necessary for mql4
//+------------------------------------------------------------------+
//| Include files                                                    |
//+------------------------------------------------------------------+
#include "Label.mqh"
//+------------------------------------------------------------------+
//| CheckBox object class of the WForms controls                     |
//+------------------------------------------------------------------+
class CCheckBox : public CLabel
  {
private:
//--- Set X and Y checkbox coordinates
   void              SetCheckFlagCoords(int &x,int &y);
//--- Set the corrected text coordinates depending on the text alignment and checkbox
   void              SetCorrectTextCoords(void);

protected:
   int               m_text_x;                                       // Text X coordinate
   int               m_text_y;                                       // Text Y coordinate
   int               m_check_x;                                      // Checkbox X coordinate
   int               m_check_y;                                      // Checkbox Y coordinate
   int               m_check_w;                                      // Checkbox width
   int               m_check_h;                                      // Checkbox height
   color             m_check_back_color_init;                        // Initial color of the checkbox background
   color             m_check_border_color_init;                      // Initial color of the checkbox background frame
   color             m_check_flag_color_init;                        // Initial color of the checkbox
//--- Set the element width and height automatically
   virtual bool      AutoSetWH(void);
//--- Displays the checkbox for the specified state
   virtual void      ShowControlFlag(const ENUM_CANV_ELEMENT_CHEK_STATE state);
   
//--- (1) Set and (2) return the checkbox size on the element
   void              SetCheckWidth(const int width)                  { this.m_check_w=(width<5  ? 5 : width);  }
   void              SetCheckHeight(const int height)                { this.m_check_h=(height<5 ? 5 : height); }
   int               CheckWidth(void)                          const { return this.m_check_w;                  }
   int               CheckHeight(void)                         const { return this.m_check_h;                  }

//--- 'The cursor is inside the active area, the mouse buttons are not clicked' event handler
   virtual void      MouseActiveAreaNotPressedHandler(const int id,const long& lparam,const double& dparam,const string& sparam);
//--- 'The cursor is inside the active area, a mouse button is clicked (any)' event handler
   virtual void      MouseActiveAreaPressedHandler(const int id,const long& lparam,const double& dparam,const string& sparam);
//--- 'The cursor is inside the active area, the left mouse button is clicked' event handler
   virtual void      MouseActiveAreaReleasedHandler(const int id,const long& lparam,const double& dparam,const string& sparam);

public:
//--- Set the element (1) width and (2) height,
   virtual bool      SetWidth(const int width)                       { return CGCnvElement::SetWidth(width>this.m_check_w   ? width  : this.m_check_w);     }
   virtual bool      SetHeight(const int height)                     { return CGCnvElement::SetHeight(height>this.m_check_h ? height : this.m_check_h);     }
   
//--- (1) Set and (2) return the element checkbox location angle (alignment type)
   void              SetCheckAlign(const ENUM_ANCHOR_POINT anchor)   { this.SetProperty(CANV_ELEMENT_PROP_CHECK_ALIGN,anchor);                              }
   ENUM_ANCHOR_POINT CheckAlign(void)                          const { return (ENUM_ANCHOR_POINT)this.GetProperty(CANV_ELEMENT_PROP_CHECK_ALIGN);           }
   
//--- (1) Set and (2) return the checkbox status
   virtual void      SetChecked(const bool flag)
                       {
                        this.SetProperty(CANV_ELEMENT_PROP_CHECKED,flag);
                        if((bool)this.CheckState()!=flag)
                           this.SetCheckState((ENUM_CANV_ELEMENT_CHEK_STATE)flag);
                       }
   bool              Checked(void)                             const { return (bool)this.GetProperty(CANV_ELEMENT_PROP_CHECKED);                            }
   
//--- (1) Set and (2) return the control status
   void              SetCheckState(const ENUM_CANV_ELEMENT_CHEK_STATE state)
                       {
                        this.SetProperty(CANV_ELEMENT_PROP_CHECK_STATE,state);
                        if((bool)state!=this.Checked())
                           this.SetChecked((bool)state);
                       }
   ENUM_CANV_ELEMENT_CHEK_STATE CheckState(void)               const { return (ENUM_CANV_ELEMENT_CHEK_STATE)this.GetProperty(CANV_ELEMENT_PROP_CHECK_STATE);}
   
//--- (1) Set and (2) return the flag of the checkbox auto change when it is selected
   void              SetAutoCheck(const bool flag)                   { this.SetProperty(CANV_ELEMENT_PROP_AUTOCHECK,flag);                                  }
   bool              AutoCheck(void)                           const { return (bool)this.GetProperty(CANV_ELEMENT_PROP_AUTOCHECK);                          }
   
//--- (1) Set and (2) return the control verification checkbox background color
   void              SetCheckBackgroundColor(const color clr,const bool set_init_color)
                       {
                        this.SetProperty(CANV_ELEMENT_PROP_CHECK_BACKGROUND_COLOR,clr);
                        if(set_init_color)
                           this.SetCheckBackgroundColorInit(clr);
                       }
   color             CheckBackgroundColor(void)                   const { return (color)this.GetProperty(CANV_ELEMENT_PROP_CHECK_BACKGROUND_COLOR);         }
//--- (1) Set and (2) return the control verification checkbox background color opacity
   void              SetCheckBackgroundColorOpacity(const uchar value)  { this.SetProperty(CANV_ELEMENT_PROP_CHECK_BACKGROUND_COLOR_OPACITY,value);         }
   uchar             CheckBackgroundColorOpacity(void)            const { return (uchar)this.GetProperty(CANV_ELEMENT_PROP_CHECK_BACKGROUND_COLOR_OPACITY); }
//--- (1) Set and (2) return the color of control checkbox background when clicking the control
   void              SetCheckBackgroundColorMouseDown(const color clr)  { this.SetProperty(CANV_ELEMENT_PROP_CHECK_BACKGROUND_COLOR_MOUSE_DOWN,clr);        }
   color             CheckBackgroundColorMouseDown(void)          const { return (color)this.GetProperty(CANV_ELEMENT_PROP_CHECK_BACKGROUND_COLOR_MOUSE_DOWN);}
//--- (1) Set and (2) return the color of control checkbox background when hovering the mouse over the control
   void              SetCheckBackgroundColorMouseOver(const color clr)  { this.SetProperty(CANV_ELEMENT_PROP_CHECK_BACKGROUND_COLOR_MOUSE_OVER,clr);        }
   color             CheckBackgroundColorMouseOver(void)          const { return (color)this.GetProperty(CANV_ELEMENT_PROP_CHECK_BACKGROUND_COLOR_MOUSE_OVER);}
//--- (1) Set and (2) return the initial color of the control verification checkbox background
   void              SetCheckBackgroundColorInit(const color clr)       { this.m_check_back_color_init=clr;                                                 }
   color             CheckBackgroundColorInit(void)               const { return (color)this.m_check_back_color_init;                                       }

//--- (1) Set and (2) return the control checkbox frame color
   void              SetCheckBorderColor(const color clr,const bool set_init_color)
                       {
                        this.SetProperty(CANV_ELEMENT_PROP_CHECK_FORE_COLOR,clr);
                        if(set_init_color)
                           this.SetCheckBorderColorInit(clr);
                       }
   color             CheckBorderColor(void)                       const { return (color)this.GetProperty(CANV_ELEMENT_PROP_CHECK_FORE_COLOR);               }
//--- (1) Set and (2) return the control checkbox frame color opacity
   void              SetCheckBorderColorOpacity(const uchar value)      { this.SetProperty(CANV_ELEMENT_PROP_CHECK_FORE_COLOR_OPACITY,value);               }
   uchar             CheckBorderColorOpacity(void)                const { return (uchar)this.GetProperty(CANV_ELEMENT_PROP_CHECK_FORE_COLOR_OPACITY);       }
//--- (1) Set and (2) return the color of control checkbox frame color when clicking on the control
   void              SetCheckBorderColorMouseDown(const color clr)      { this.SetProperty(CANV_ELEMENT_PROP_CHECK_FORE_COLOR_MOUSE_DOWN,clr);              }
   color             CheckBorderColorMouseDown(void)              const { return (color)this.GetProperty(CANV_ELEMENT_PROP_CHECK_FORE_COLOR_MOUSE_DOWN);    }
//--- (1) Set and (2) return the color of the control checkbox frame color when hovering the mouse over the control
   void              SetCheckBorderColorMouseOver(const color clr)      { this.SetProperty(CANV_ELEMENT_PROP_CHECK_FORE_COLOR_MOUSE_OVER,clr);              }
   color             CheckBorderColorMouseOver(void)              const { return (color)this.GetProperty(CANV_ELEMENT_PROP_CHECK_FORE_COLOR_MOUSE_OVER);    }
//--- (1) Set and (2) return the initial color of the control verification checkbox frame
   void              SetCheckBorderColorInit(const color clr)           { this.m_check_border_color_init=clr;                                               }
   color             CheckBorderColorInit(void)                   const { return (color)this.m_check_border_color_init;                                     }

//--- (1) Set and (2) return the control verification checkbox color
   void              SetCheckFlagColor(const color clr,const bool set_init_color)
                       {
                        this.SetProperty(CANV_ELEMENT_PROP_CHECK_FLAG_COLOR,clr);
                        if(set_init_color)
                           this.SetCheckFlagColorInit(clr);
                       }
   color             CheckFlagColor(void)                         const { return (color)this.GetProperty(CANV_ELEMENT_PROP_CHECK_FLAG_COLOR);               }
//--- (1) Set and (2) return the control verification checkbox color opacity
   void              SetCheckFlagColorOpacity(const uchar value)        { this.SetProperty(CANV_ELEMENT_PROP_CHECK_FLAG_COLOR_OPACITY,value);               }
   uchar             CheckFlagColorOpacity(void)                  const { return (uchar)this.GetProperty(CANV_ELEMENT_PROP_CHECK_FLAG_COLOR_OPACITY);       }
//--- (1) Set and (2) return the color of control checkbox when clicking on the control
   void              SetCheckFlagColorMouseDown(const color clr)        { this.SetProperty(CANV_ELEMENT_PROP_CHECK_FLAG_COLOR_MOUSE_DOWN,clr);              }
   color             CheckFlagColorMouseDown(void)                const { return (color)this.GetProperty(CANV_ELEMENT_PROP_CHECK_FLAG_COLOR_MOUSE_DOWN); }
//--- (1) Set and (2) return the color of the control checkbox when hovering the mouse over the control
   void              SetCheckFlagColorMouseOver(const color clr)        { this.SetProperty(CANV_ELEMENT_PROP_CHECK_FLAG_COLOR_MOUSE_OVER,clr);              }
   color             CheckFlagColorMouseOver(void)                const { return (color)this.GetProperty(CANV_ELEMENT_PROP_CHECK_FLAG_COLOR_MOUSE_OVER);    }
//--- (1) Set and (2) return the initial color of the control verification checkbox
   void              SetCheckFlagColorInit(const color clr)             { this.m_check_flag_color_init=clr;                                                 }
   color             CheckFlagColorInit(void)                     const { return (color)this.m_check_flag_color_init;                                       }
   
//--- Last mouse event handler
   virtual void      OnMouseEventPostProcessing(void);
   
//--- Redraw the object
   virtual void      Redraw(bool redraw);

protected:
//--- Protected constructor with object type, chart ID and subwindow
                     CCheckBox(const ENUM_GRAPH_ELEMENT_TYPE type,
                               CGCnvElement *main_obj,CGCnvElement *base_obj,
                               const long chart_id,
                               const int subwindow,
                               const string descript,
                               const int x,
                               const int y,
                               const int w,
                               const int h);
public:
//--- Constructor
                     CCheckBox(CGCnvElement *main_obj,CGCnvElement *base_obj,
                               const long chart_id,
                               const int subwindow,
                               const string descript,
                               const int x,
                               const int y,
                               const int w,
                               const int h);
  };
//+------------------------------------------------------------------+
//| Protected constructor with an object type,                       |
//| chart ID and subwindow                                           |
//+------------------------------------------------------------------+
CCheckBox::CCheckBox(const ENUM_GRAPH_ELEMENT_TYPE type,
                     CGCnvElement *main_obj,CGCnvElement *base_obj,
                     const long chart_id,
                     const int subwindow,
                     const string descript,
                     const int x,
                     const int y,
                     const int w,
                     const int h) : CLabel(type,main_obj,base_obj,chart_id,subwindow,descript,x,y,w,h)
  {
//--- Set the specified graphical element type for the object and assign the library object type to the current object
   this.SetTypeElement(type);
   this.m_type=OBJECT_DE_TYPE_GWF_COMMON;
   this.SetCoordX(x);
   this.SetCoordY(y);
   this.SetCheckWidth(DEF_CHECK_SIZE);
   this.SetCheckHeight(DEF_CHECK_SIZE);
   this.SetWidth(w);
   this.SetHeight(h);
   this.Initialize();
   this.SetOpacity(0);
   this.SetForeColorMouseDown(CLR_DEF_FORE_COLOR_MOUSE_DOWN);
   this.SetForeColorMouseOver(CLR_DEF_FORE_COLOR_MOUSE_OVER);
   this.SetCheckBackgroundColor(CLR_DEF_CHECK_BACK_COLOR,true);
   this.SetCheckBackgroundColorMouseDown(CLR_DEF_CHECK_BACK_MOUSE_DOWN);
   this.SetCheckBackgroundColorMouseOver(CLR_DEF_CHECK_BACK_MOUSE_OVER);
   this.SetCheckBorderColor(CLR_DEF_CHECK_BORDER_COLOR,true);
   this.SetCheckBorderColorMouseDown(CLR_DEF_CHECK_BORDER_MOUSE_DOWN);
   this.SetCheckBorderColorMouseOver(CLR_DEF_CHECK_BORDER_MOUSE_OVER);
   this.SetCheckFlagColor(CLR_DEF_CHECK_FLAG_COLOR,true);
   this.SetCheckFlagColorMouseDown(CLR_DEF_CHECK_FLAG_MOUSE_DOWN);
   this.SetCheckFlagColorMouseOver(CLR_DEF_CHECK_FLAG_MOUSE_OVER);
   this.SetWidthInit(this.Width());
   this.SetHeightInit(this.Height());
   this.SetCoordXInit(x);
   this.SetCoordYInit(y);
   this.SetTextAlign(ANCHOR_LEFT);
   this.SetActiveAreaShift(1,1,1,1);
   this.m_text_x=0;
   this.m_text_y=0;
   this.m_check_x=0;
   this.m_check_y=0;
   this.Redraw(false);
  }
//+------------------------------------------------------------------+
//| Constructor indicating the main and base objects,                |
//| chart ID and subwindow                                           |
//+------------------------------------------------------------------+
CCheckBox::CCheckBox(CGCnvElement *main_obj,CGCnvElement *base_obj,
                     const long chart_id,
                     const int subwindow,
                     const string descript,
                     const int x,
                     const int y,
                     const int w,
                     const int h) : CLabel(GRAPH_ELEMENT_TYPE_WF_CHECKBOX,main_obj,base_obj,chart_id,subwindow,descript,x,y,w,h)
  {
   this.SetTypeElement(GRAPH_ELEMENT_TYPE_WF_CHECKBOX);
   this.m_type=OBJECT_DE_TYPE_GWF_COMMON;
   this.SetCoordX(x);
   this.SetCoordY(y);
   this.SetCheckWidth(DEF_CHECK_SIZE);
   this.SetCheckHeight(DEF_CHECK_SIZE);
   this.SetWidth(w);
   this.SetHeight(h);
   this.Initialize();
   this.SetOpacity(0);
   this.SetForeColorMouseDown(CLR_DEF_FORE_COLOR_MOUSE_DOWN);
   this.SetForeColorMouseOver(CLR_DEF_FORE_COLOR_MOUSE_OVER);
   this.SetCheckBackgroundColor(CLR_DEF_CHECK_BACK_COLOR,true);
   this.SetCheckBackgroundColorMouseDown(CLR_DEF_CHECK_BACK_MOUSE_DOWN);
   this.SetCheckBackgroundColorMouseOver(CLR_DEF_CHECK_BACK_MOUSE_OVER);
   this.SetCheckBorderColor(CLR_DEF_CHECK_BORDER_COLOR,true);
   this.SetCheckBorderColorMouseDown(CLR_DEF_CHECK_BORDER_MOUSE_DOWN);
   this.SetCheckBorderColorMouseOver(CLR_DEF_CHECK_BORDER_MOUSE_OVER);
   this.SetCheckFlagColor(CLR_DEF_CHECK_FLAG_COLOR,true);
   this.SetCheckFlagColorMouseDown(CLR_DEF_CHECK_FLAG_MOUSE_DOWN);
   this.SetCheckFlagColorMouseOver(CLR_DEF_CHECK_FLAG_MOUSE_OVER);
   this.SetWidthInit(this.Width());
   this.SetHeightInit(this.Height());
   this.SetCoordXInit(x);
   this.SetCoordYInit(y);
   this.SetTextAlign(ANCHOR_LEFT);
   this.SetActiveAreaShift(1,1,1,1);
   this.m_text_x=0;
   this.m_text_y=0;
   this.m_check_x=0;
   this.m_check_y=0;
   this.Redraw(false);
  }
//+------------------------------------------------------------------+
//| Redraw the object                                                |
//+------------------------------------------------------------------+
void CCheckBox::Redraw(bool redraw)
  {
//--- Fill the object with the background color having full transparency
   this.EraseNoCrop(this.BackgroundColor(),this.Opacity(),true);
//--- Set corrected text coordinates relative to the checkbox
   this.SetCorrectTextCoords();
//--- Draw the text and checkbox within the set coordinates of the object and the binding point, and update the object 
   this.Text(this.m_text_x,this.m_text_y,this.Text(),this.ForeColor(),this.ForeColorOpacity(),this.TextAnchor());
   this.ShowControlFlag(this.CheckState());
   this.Crop();
   this.Update(redraw);
  }
//+------------------------------------------------------------------+
//| Set X and Y checkbox coordinates                                 |
//| depending on the alignment type                                  |
//+------------------------------------------------------------------+
void CCheckBox::SetCheckFlagCoords(int &x,int &y)
  {
//--- Depending on the checkbox location
   switch(this.CheckAlign())
     {
      //--- The checkbox is located vertically from the left side of the object in the center
      case ANCHOR_LEFT : 
        x=0;
        y=(this.Height()-this.CheckHeight())/2;
        break;
      //--- The checkbox is located in the lower left corner of the object
      case ANCHOR_LEFT_LOWER : 
        x=0;
        y=this.Height()-this.CheckHeight()-1;
        break;
      //--- The checkbox is located in the center of the bottom edge of the object
      case ANCHOR_LOWER : 
        x=(this.Width()-this.CheckWidth())/2;
        y=this.Height()-this.CheckHeight()-1;
        break;
      //--- The checkbox is located in the lower right corner of the object
      case ANCHOR_RIGHT_LOWER : 
        x=this.Width()-this.CheckWidth()-1;
        y=this.Height()-this.CheckHeight()-1;
        break;
      //--- The checkbox is located vertically from the right side of the object in the center
      case ANCHOR_RIGHT : 
        x=this.Width()-this.CheckWidth()-1;
        y=(this.Height()-this.CheckHeight())/2;
        break;
      //--- The checkbox is located in the upper right corner of the object
      case ANCHOR_RIGHT_UPPER : 
        x=this.Width()-this.CheckWidth()-1;
        y=0;
        break;
      //--- The checkbox is located in the center of the upper edge of the object
      case ANCHOR_UPPER : 
        x=(this.Width()-this.CheckWidth())/2;
        y=0;
        break;
      //--- The checkbox is located in the object center
      case ANCHOR_CENTER : 
        x=(this.Width()-this.CheckWidth())/2;
        y=(this.Height()-this.CheckHeight())/2;
        break;
      //--- The checkbox is located in the upper left corner of the object
      //---ANCHOR_LEFT_UPPER
      default:
        x=0;
        y=0;
        break;
     }
  }
//+------------------------------------------------------------------+
//| Set valid text coordinates depending on                          |
//| text alignment and checkbox                                      |
//+------------------------------------------------------------------+
void CCheckBox::SetCorrectTextCoords(void)
  {
//--- Set checkbox and text coordinates depending on their alignment method
   this.SetCheckFlagCoords(this.m_check_x,this.m_check_y);
   this.SetTextParamsByAlign(this.m_text_x,this.m_text_y);
//--- Get the text size
   int text_w=0, text_h=0;
   this.TextSize(this.Text(),text_w,text_h);
//--- Depending on the checkbox location within the object boundaries
   switch(this.CheckAlign())
     {
      //--- The checkbox is located in the upper left corner of the object
      //--- The checkbox is located vertically from the left side of the object in the center
      //--- The checkbox is located in the lower left corner of the object
      case ANCHOR_LEFT_UPPER  : 
      case ANCHOR_LEFT        : 
      case ANCHOR_LEFT_LOWER  : 
        //--- If the text is left-aligned, set the text X coordinate with the checkbox width + 2 pixels
        if(this.TextAlign()==ANCHOR_LEFT_UPPER || this.TextAlign()==ANCHOR_LEFT || this.TextAlign()==ANCHOR_LEFT_LOWER)
           this.m_text_x=this.CheckWidth()+2;
        break;

      //--- The checkbox is located in the upper right corner of the object
      //--- The checkbox is located vertically from the right side of the object in the center
      //--- The checkbox is located in the lower right corner of the object
      case ANCHOR_RIGHT_UPPER : 
      case ANCHOR_RIGHT       : 
      case ANCHOR_RIGHT_LOWER : 
        //--- If the text is right-aligned, set the text X coordinate with the checkbox width + 2 pixels
        if(this.TextAlign()==ANCHOR_RIGHT_UPPER || this.TextAlign()==ANCHOR_RIGHT || this.TextAlign()==ANCHOR_RIGHT_LOWER)
           this.m_text_x=this.Width()-this.CheckWidth()-2;
        break;

      //--- The checkbox is located in the center of the bottom edge of the object
      case ANCHOR_LOWER : 
        //--- If the text is bottom-aligned, set the text X coordinate with the checkbox height
        if(this.TextAlign()==ANCHOR_LEFT_LOWER || this.TextAlign()==ANCHOR_LOWER || this.TextAlign()==ANCHOR_RIGHT_LOWER)
           this.m_text_y=this.m_check_y;
        break;
      
      //--- The checkbox is located in the center of the upper edge of the object
      case ANCHOR_UPPER : 
        //--- If the text is top-aligned, set the text X coordinate with the checkbox height
        if(this.TextAlign()==ANCHOR_LEFT_UPPER || this.TextAlign()==ANCHOR_UPPER || this.TextAlign()==ANCHOR_RIGHT_UPPER)
           this.m_text_y=this.m_check_h;
        break;
      //--- The checkbox is located in the object center
      //---ANCHOR_CENTER
      default:
        break;
     }
  }
//+------------------------------------------------------------------+
//| Display the checkbox for the specified state                     |
//+------------------------------------------------------------------+
void CCheckBox::ShowControlFlag(const ENUM_CANV_ELEMENT_CHEK_STATE state)
  {
//--- Draw a filled rectangle of the selection checkbox area
   this.DrawRectangleFill(this.m_check_x,this.m_check_y,this.m_check_x+this.CheckWidth(),this.m_check_y+this.CheckHeight(),this.CheckBackgroundColor(),this.CheckBackgroundColorOpacity());
//--- Draw the rectangle of checkbox boundaries
   this.DrawRectangle(this.m_check_x,this.m_check_y,this.m_check_x+this.CheckWidth(),this.m_check_y+this.CheckHeight(),this.CheckBorderColor(),this.CheckBorderColorOpacity());
//--- Create X and Y coordinate arrays for drawing a polyline
   double x=(double)this.m_check_x;
   double y=(double)this.m_check_y;
   double w=(double)this.m_check_w;
   double h=(double)this.m_check_h;
//--- Calculate coordinates as double values and write them to arrays as integers
   int array_x[]={int(x+w*0.2), int(x+w*0.45), int(x+w*0.85), int(x+w*0.45)};
   int array_y[]={int(y+h*0.5), int(y+h*0.6),  int(y+h*0.3),  int(y+h*0.75)};
//--- Depending on the checkbox status passed to the method
   switch(state)
     {
      //--- Checked box
      case CANV_ELEMENT_CHEK_STATE_CHECKED :
        //--- First, draw a filled polygon inside the checkbox borders,
        //--- as well as a smoothed polygon in the form of a checkmark on top of it
        this.DrawPolygonFill(array_x,array_y,this.CheckFlagColor(),this.CheckFlagColorOpacity());
        this.DrawPolygonAA(array_x,array_y,this.CheckFlagColor(),this.CheckFlagColorOpacity());
        break;
      //--- Undefined state
      case CANV_ELEMENT_CHEK_STATE_INDETERMINATE :
        //--- Draw a filled rectangle inside the checkbox boundaries
        this.DrawRectangleFill(int(x+w*0.3),int(y+h*0.3),int(x+w*0.7),int(y+h*0.7),this.CheckFlagColor(),this.CheckFlagColorOpacity());
        break;
      //--- Unchecked checkbox
      default:
        break;
     }
  }
//+------------------------------------------------------------------+
//| Set the element width and height automatically                   |
//+------------------------------------------------------------------+
bool CCheckBox::AutoSetWH(void)
  {
//--- Define the variables for receiving the label width and height
   int w=0, h=0;
//--- Get the width and height depending on the object text
   CGCnvElement::TextSize(this.Text()!="" && this.Text()!=NULL ? this.Text() : " ",w,h);
//--- Add the Margin values of the object on the left and right to the resulting width, as well as the checkbox size
   w+=(this.MarginLeft()+this.MarginRight()+this.CheckWidth());
//--- If the width is equal to the size of the checkbox, set it to three pixels + checkbox size
   if(w==this.CheckWidth())
      w=this.CheckWidth()+3;
//--- Add the Margin values of the object on the top and bottom to the resulting height
   h+=(this.MarginTop()+this.MarginBottom());
//--- If failed to get the height, set it as "font size" * ratio
   if(h==0)
      h=(int)ceil(FontSize()*1.625);
//--- If the height is ultimately less than the size of the checkbox, set the height equal to the height of the checkbox
   if(h<this.CheckHeight())
      h=this.CheckHeight();
//--- Set the object width and height from the received values and write the result to res
   bool res=true;
   res &=this.SetWidth(w);
   res &=this.SetHeight(h);
//--- Return the result of changing the width and height
   return res;
  }
//+------------------------------------------------------------------+
//| 'The cursor is inside the active area,                           |
//| no mouse buttons are clicked' event                              |
//+------------------------------------------------------------------+
void CCheckBox::MouseActiveAreaNotPressedHandler(const int id,const long& lparam,const double& dparam,const string& sparam)
  {
   this.SetCheckBackgroundColor(this.CheckBackgroundColorMouseOver(),false);
   this.SetCheckBorderColor(this.CheckBorderColorMouseOver(),false);
   this.SetCheckFlagColor(this.CheckFlagColorMouseOver(),false);
   this.SetBackgroundColor(this.BackgroundColorMouseOver(),false);
   this.Redraw(false);
  }
//+------------------------------------------------------------------+
//| 'The cursor is inside the active area,                           |
//| a mouse button is clicked (any)                                  |
//+------------------------------------------------------------------+
void CCheckBox::MouseActiveAreaPressedHandler(const int id,const long& lparam,const double& dparam,const string& sparam)
  {
   this.SetCheckBackgroundColor(this.CheckBackgroundColorMouseDown(),false);
   this.SetCheckBorderColor(this.CheckBorderColorMouseDown(),false);
   this.SetCheckFlagColor(this.CheckFlagColorMouseDown(),false);
   this.SetBackgroundColor(this.BackgroundColorMouseDown(),false);
   this.Redraw(false);
  }
//+------------------------------------------------------------------+
//| 'The cursor is inside the active area,                           |
//| left mouse button released                                       |
//+------------------------------------------------------------------+
void CCheckBox::MouseActiveAreaReleasedHandler(const int id,const long& lparam,const double& dparam,const string& sparam)
  {
//--- The mouse button released outside the element means refusal to interact with the element
   if(lparam<this.CoordX() || lparam>this.RightEdge() || dparam<this.CoordY() || dparam>this.BottomEdge())
     {
      this.SetCheckBackgroundColor(this.CheckBackgroundColorInit(),false);
      this.SetCheckBorderColor(this.CheckBorderColorInit(),false);
      this.SetCheckFlagColor(this.CheckFlagColorInit(),false);
      this.SetBackgroundColor(this.BackgroundColorInit(),false);
      //--- Send the event:
      this.SendEvent(::ChartID(),WF_CONTROL_EVENT_CLICK_CANCEL);
      //--- Send a test entry to the journal
      Print(DFUN_ERR_LINE,TextByLanguage("Отмена","Cancel"));
     }
//--- The mouse button released within the element means a  click on the control
   else
     {
      this.SetCheckBackgroundColor(this.CheckBackgroundColorMouseOver(),false);
      this.SetCheckBorderColor(this.CheckBorderColorMouseOver(),false);
      this.SetCheckFlagColor(this.CheckFlagColorInit(),false);
      this.SetBackgroundColor(this.BackgroundColorMouseOver(),false);
      this.SetChecked(!this.Checked());
      //--- Send the event:
      this.SendEvent(::ChartID(),WF_CONTROL_EVENT_CLICK);
      //--- Send a test entry to the journal
      Print(DFUN_ERR_LINE,TextByLanguage("Щелчок","Click"),", this.Checked()=",this.Checked(),", ID=",this.ID());
     }
   this.Redraw(false);
  }
//+------------------------------------------------------------------+
//| Last mouse event handler                                         |
//+------------------------------------------------------------------+
void CCheckBox::OnMouseEventPostProcessing(void)
  {
   if(!this.IsVisible() || !this.Enabled())
      return;
   ENUM_MOUSE_FORM_STATE state=GetMouseState();
   switch(state)
     {
      //--- The cursor is outside the form, the mouse buttons are not clicked
      //--- The cursor is outside the form, any mouse button is clicked
      //--- The cursor is outside the form, the mouse wheel is being scrolled
      case MOUSE_FORM_STATE_OUTSIDE_FORM_NOT_PRESSED :
      case MOUSE_FORM_STATE_OUTSIDE_FORM_PRESSED     :
      case MOUSE_FORM_STATE_OUTSIDE_FORM_WHEEL       :
        if(this.MouseEventLast()==MOUSE_EVENT_INSIDE_ACTIVE_AREA_NOT_PRESSED || this.MouseEventLast()==MOUSE_EVENT_INSIDE_FORM_NOT_PRESSED)
          {
           this.SetBackgroundColor(this.BackgroundColorInit(),false);
           this.SetBorderColor(this.BorderColorInit(),false);
           this.SetCheckBackgroundColor(this.CheckBackgroundColorInit(),false);
           this.SetCheckBorderColor(this.CheckBorderColorInit(),false);
           this.SetCheckFlagColor(this.CheckFlagColorInit(),false);
           this.m_mouse_event_last=ENUM_MOUSE_EVENT(state+MOUSE_EVENT_NO_EVENT);
           this.Redraw(false);
          }
        break;
      //--- The cursor is inside the form, the mouse buttons are not clicked
      //--- The cursor is inside the form, any mouse button is clicked
      //--- The cursor is inside the form, the mouse wheel is being scrolled
      //--- The cursor is inside the active area, the mouse buttons are not clicked
      //--- The cursor is inside the active area, any mouse button is clicked
      //--- The cursor is inside the active area, the mouse wheel is being scrolled
      //--- The cursor is inside the active area, left mouse button is released
      //--- The cursor is within the window scrolling area, the mouse buttons are not clicked
      //--- The cursor is within the window scrolling area, any mouse button is clicked
      //--- The cursor is within the window scrolling area, the mouse wheel is being scrolled
      case MOUSE_FORM_STATE_INSIDE_FORM_NOT_PRESSED :
      case MOUSE_FORM_STATE_INSIDE_FORM_PRESSED :
      case MOUSE_FORM_STATE_INSIDE_FORM_WHEEL :
      case MOUSE_FORM_STATE_INSIDE_ACTIVE_AREA_NOT_PRESSED :
      case MOUSE_FORM_STATE_INSIDE_ACTIVE_AREA_PRESSED :
      case MOUSE_FORM_STATE_INSIDE_ACTIVE_AREA_WHEEL :
      case MOUSE_FORM_STATE_INSIDE_ACTIVE_AREA_RELEASED :
      case MOUSE_FORM_STATE_INSIDE_SCROLL_AREA_NOT_PRESSED :
      case MOUSE_FORM_STATE_INSIDE_SCROLL_AREA_PRESSED :
      case MOUSE_FORM_STATE_INSIDE_SCROLL_AREA_WHEEL :
        break;
      //--- MOUSE_EVENT_NO_EVENT
      default:
        break;
     }
  }
//+------------------------------------------------------------------+
