C / C++ / MFC

28-Jun-06 20:04

Im not sure i think i see in http://www.codeguru.comsee(CComboBox)

whitesky

hi all [modified]

ashish dogra28-Jun-06 19:33

28-Jun-06 19:33

plz tell me

dlg.Create(IDD_DIALOG1);
dlg.ShowWindow(1);
when i rty this to create modeless dialog box after one try it will create error as assertion failureplz
Ashish Dogra
MCA
Noida

-- modified at 1:33 Thursday 29th June, 2006

Hamid_RT28-Jun-06 19:36

28-Jun-06 19:36

yes because you create your dialog and you dont need to create again

whitesky

ashish dogra28-Jun-06 19:41

28-Jun-06 19:41

sir i will try to create it again after cancelling it
but sir as with domaodal() we can try again after cancelling it it will not give any error

Ashish Dogra
MCA
Noida

Sarath C28-Jun-06 19:43

Sarath C

28-Jun-06 19:43

For a modeless dailog, you should define your own constructore,
never let the default constructor to call the base class with template ID.

Here is an article from MSDN[^]

SaRath.

"It is your attitude, not your aptitude, that determines your altitude - Zig Ziglar."
My Blog | Understanding State Pattern in C++

ashish dogra28-Jun-06 20:00

28-Jun-06 20:00

even i use this i will still not solve the problem
CMy dlg;
dlg.Create(IDD_DIALOG1);
dlg.ShowWindow(1);
please tell me some example

Ashish Dogra
MCA
Noida

Hamid_RT28-Jun-06 20:05

28-Jun-06 20:05

ashish dogra wrote:
CMy dlg;
dlg.Create(IDD_DIALOG1);
dlg.ShowWindow(1);

Whats problem with this code

whitesky

ashish dogra28-Jun-06 20:45

28-Jun-06 20:45

sir
the problem is that when i run application the modeless dialog box open a screen after clicking on ok button of fiest dialog box
but when i cancel the modeless dialog and again click on ok button of first dialog box then it will give an assertion error and does not create modeless dialog box again
plz sovle this one

Ashish Dogra
MCA
Noida

Hamid_RT28-Jun-06 20:46

28-Jun-06 20:46

Can you show how to use and you show your code that has error

whitesky

ashish dogra28-Jun-06 21:05

28-Jun-06 21:05

void CGd1Dlg::OnOK()
{
CMy dlg;
dlg.Create(IDD_DIALOG1);
dlg.ShowWindow(1);
}

Ashish Dogra
MCA
Noida

Hamid_RT28-Jun-06 21:32

28-Jun-06 21:32

can you show in

CMy::CtetDlg(CWnd* pParent /*=NULL*/)<br />
: CDialog(CtetDlg::IDD, pParent)

and one suggestion use this function instead your functions and answer to me it work or doesnt work

CMy::CtetDlg(CWnd* pParent /*=NULL*/)<br />
: CDialog(CtetDlg::IDD, pParent)<br />
BOOL o=	Create(IDD,pParent);

-----------

<br />
void CGd1Dlg::OnOK() <br />
{<br />
CMy *dlg;<br />
dlg=new CMy(this);<br />
/*use from breakpoint and debug for see error if you get a error*/<br />
dlg->ShowWindow(1);<br />
}<br />

whitesky

ashish dogra28-Jun-06 21:45

28-Jun-06 21:45

thanks sir it works
thanks a lot ......................HAVE A NICE DAY

Ashish Dogra
MCA
Noida

Re: hi all [modified]

ovidiucucu28-Jun-06 20:31

ovidiucucu

28-Jun-06 20:31

After exiting DoModal, the attached window of CDialog object is destroyed and detached, so there is no problem to call DoModal again.
For a modeless dialog (made with CDialog::Create), unless the CDialog object goes out-of scope or DestroyWindow was called, the window is not destroyed, not even the user pushes OK/Cancel/close button.
So you have to test if the dialog was created before call CDialog::Create.
If yes, then simply show it:

void CFoo::ShowModelessDialog(CDialog& dlg, UINT nResID)
{
   if(!::IsWindow(dlg.m_hWnd)) // thest attached window handle
   {
       // create only if not yet created
      dlg.Create(nResID, this);
   }
   dlg.ShowWindow(SW_SHOW);
}
// ...
// ... somewhere ...
   ShowDialog(m_dlg, IDD_DIALOG1);
// ... and no problem to show again
   ShowDialog(m_dlg, IDD_DIALOG1);

NOTE: You can test m_hWnd against NULL instead of calling ::IsWindow, as well.

Ovidiu Cucu
Microsoft MVP - Visual C++

Nawal K Gupta28-Jun-06 21:03

Nawal K Gupta

28-Jun-06 21:03

In you use this code
void OnSomeFunction()
{
CMy dlg;
dlg.Create(IDD_DIALOG1);
dlg.ShowWindow(1);
}
this is not safe, because the dlg object is created in Stack and it will get destroyed
as soon as the function is out of scope.

Create ModeLess Dialogs in Heap or Make Sure that the Object is not out of scope by making is
static or Global/Top Clsss Variale Like.
One Way of Doing It is:
void OnSomeFunction()
{
static CMy * Dlg =NULL;
if (!m_Dlg)
{
Dlg= new CMy();
Dlg->Create(IDD_DIALOG1);

}

dlg.ShowWindow(1);
}