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Problem Inserting Items on TabCtrl


IMPLEMENT_DYNAMIC(CObjektDlg, CDialog)
CObjektDlg::CObjektDlg(CWnd* pParent /*=NULL*/)
      : CDialog(CObjektDlg::IDD, pParent)
{
      od_TabCtrl.InsertItem(0,"test");
}

It gives me a runtime error... why?
0
dkloeck
Asked:
dkloeck
1 Solution
 
r2farCommented:
Never used a tab control so if the problem lies with the control i can't help.

However, with many controls, calls to member functions cause runtime errors if the control has not yet been created.

The control should not be touched until OnInitialUpdate() function, and not till after, in that function, the contrtol is created.  This is of course unless the dialog creates the control, but even then, handle the control method calls in InitialUpdate() at the earliest.
0
 
AlexFMCommented:
Move this code to OnInitDialog function.
0
 
nonubikCommented:
dkloeck, at the time the CObjektDlg contructs, its member od_TabCtrl (I presume it's a member) does not have a hWnd. This happens only after dialog creation. So try overriding OnInitDialog for your CObjektDlg and insert the item in tabctrl there.
0
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dkloeckAuthor Commented:
I wrote:

BOOL CObjektDlg::OnInitDialog()
{
      od_TabCtrl.InsertItem(0,"test");
      return TRUE;
}

but it still gives the same error
0
 
nonubikCommented:
What error do you get? How is od_TabCtrl defined?
0
 
dkloeckAuthor Commented:
// ObjektDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Winlinx2.h"
#include "ObjektDlg.h"


// CObjektDlg dialog

IMPLEMENT_DYNAMIC(CObjektDlg, CDialog)
CObjektDlg::CObjektDlg(CWnd* pParent /*=NULL*/)
      : CDialog(CObjektDlg::IDD, pParent)
{
}

BOOL CObjektDlg::OnInitDialog()
{
      od_TabCtrl.InsertItem(0,"test");
      return TRUE;
}

CObjektDlg::~CObjektDlg()
{
}

void CObjektDlg::DoDataExchange(CDataExchange* pDX)
{
      CDialog::DoDataExchange(pDX);
      DDX_Control(pDX, IDC_TAB1, od_TabCtrl);
}


BEGIN_MESSAGE_MAP(CObjektDlg, CDialog)
      ON_WM_CREATE()
END_MESSAGE_MAP()


// CObjektDlg message handlers

int CObjektDlg::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
      if (CDialog::OnCreate(lpCreateStruct) == -1)
            return -1;

      // TODO:  Add your specialized creation code here


      return 0;
}

#pragma once
#include "afxcmn.h"


// CObjektDlg dialog

class CObjektDlg : public CDialog
{
      DECLARE_DYNAMIC(CObjektDlg)

public:
      CObjektDlg(CWnd* pParent = NULL);   // standard constructor
      virtual ~CObjektDlg();
      BOOL OnInitDialog();

// Dialog Data
      enum { IDD = IDD_ObjektDlg };

protected:
      virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
      
      DECLARE_MESSAGE_MAP()
public:
      CTabCtrl od_TabCtrl;
      afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
};


Objekt dialog is called with a DoModal() funktion.
0
 
dkloeckAuthor Commented:
on #pragma once begins the header (ObjektDlg.h)
0
 
dkloeckAuthor Commented:
btw..
i couldnt find InitDlg in the dlg messages, so i made it by myself..maybe i must put something in messagemap?
0
 
nonubikCommented:
you must call CDialog::OnInitDialog() before inserting item in tabctrl

BOOL CObjektDlg::OnInitDialog()
{
     CDialog::OnInitDialog();
     od_TabCtrl.InsertItem(0,"test");
     return TRUE;
}
0
 
AndyAinscowCommented:
couldnt find InitDlg in the dlg messages, so i made it by myself..maybe i must put something in messagemap?

in class wizard filter on messages for a dialog , it is the WM_INITDIALOG you want.
0
 
dkloeckAuthor Commented:
well..there were only WM_INITMENU and WM_INITMENUPOPUP
0

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