gui in mql5 for EA

[powerful77]

hi i try to understund panel (example in indicator ), why edit not show ?

• PanelDialog.mqh

//+------------------------------------------------------------------+
//|                                                  PanelDialog.mqh |
//|                             Copyright 2000-2024, MetaQuotes Ltd. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#include <Controls\Dialog.mqh>
#include <Controls\Button.mqh>
#include <Controls\Edit.mqh>
#include <Controls\ListView.mqh>
#include <Controls\ComboBox.mqh>
#include <Controls\SpinEdit.mqh>
#include <Controls\RadioGroup.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                      (10)      // gap by X coordinate
#define CONTROLS_GAP_Y                      (10)      // 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
//+------------------------------------------------------------------+
//| Class CPanelDialog                                               |
//| Usage: main dialog of the SimplePanel application                |
//+------------------------------------------------------------------+
class CPanelDialog : public CAppDialog
  {
private:

   CEdit             m_edit;                          // the display field object
 
public:
                     CPanelDialog(void);
                    ~CPanelDialog(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              CreateEdit(void);
  
   //--- internal event handlers
   virtual bool      OnResize(void);
   //--- handlers of the dependent controls events
    };
//+------------------------------------------------------------------+
//| Event Handling                                                   |
//+------------------------------------------------------------------+
EVENT_MAP_BEGIN(CPanelDialog)
  
EVENT_MAP_END(CAppDialog)
//+------------------------------------------------------------------+
//| Constructor                                                      |
//+------------------------------------------------------------------+
CPanelDialog::CPanelDialog(void)
  {
  }
//+------------------------------------------------------------------+
//| Destructor                                                       |
//+------------------------------------------------------------------+
CPanelDialog::~CPanelDialog(void)
  {
  }
//+------------------------------------------------------------------+
//| Create                                                           |
//+------------------------------------------------------------------+
bool CPanelDialog::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
  

//--- succeed
   return(true);
  }
//+------------------------------------------------------------------+
//| Create the display field                                         |
//+------------------------------------------------------------------+
bool CPanelDialog::CreateEdit(void)
  {
//--- coordinates
   int x1=INDENT_LEFT;
   int y1=INDENT_TOP;
   int x2=ClientAreaWidth()-(INDENT_RIGHT+BUTTON_WIDTH+CONTROLS_GAP_X);
   int y2=y1+EDIT_HEIGHT;
//--- create
   if(!m_edit.Create(m_chart_id,m_name+"Edit",m_subwin,x1,y1,x2,y2))
      return(false);
   if(!m_edit.ReadOnly(true))
      return(false);
   if(!Add(m_edit))
      return(false);
   m_edit.Alignment(WND_ALIGN_WIDTH,INDENT_LEFT,0,INDENT_RIGHT+BUTTON_WIDTH+CONTROLS_GAP_X,0);
//--- succeed

   return(true);
  }

//+------------------------------------------------------------------+
//| Handler of resizing                                              |
//+------------------------------------------------------------------+
bool CPanelDialog::OnResize(void)
  {
//--- call method of parent class
   if(!CAppDialog::OnResize()) return(false);
//--- coordinates
   int x=ClientAreaLeft()+INDENT_LEFT;

   return(true);
  }

• Trademanfer.mq5

//+------------------------------------------------------------------+
//|                                                  SimplePanel.mq5 |
//|                             Copyright 2000-2024, MetaQuotes Ltd. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2000-2024, MetaQuotes Ltd."
#property link      "https://www.mql5.com"
#property version   "1.00"

#include "PanelDialog.mqh"
//+------------------------------------------------------------------+
//| Global Variables                                                 |
//+------------------------------------------------------------------+
CPanelDialog ExtDialog;
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit(void)
  {
//--- create application dialog
   if(!ExtDialog.Create(0,"Simple Panel",0,50,50,390,300))
     return(INIT_FAILED);
//--- run application
   if(!ExtDialog.Run())
     return(INIT_FAILED);
//--- succeed
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
  {
//--- destroy application dialog
   ExtDialog.Destroy(reason);
  }

//+------------------------------------------------------------------+
//| ChartEvent function                                              |
//+------------------------------------------------------------------+
void OnChartEvent(const int id,
                  const long &lparam,
                  const double &dparam,
                  const string &sparam)
  {
   ExtDialog.ChartEvent(id,lparam,dparam,sparam);
  }
//+------------------------------------------------------------------+