Dialog initialisation

[oxie]

Hi,

I have a main dialog box with a button. This button displays another dialog box. I want to initialize some controls on this second dialog box but I want these controls to be initialized ONCE : when the program starts.
If I try this :

void CMainDlg:nBnClicked()
{
CMyDialog myDlg;
myDlg.ctrl_checkbox.EnableWindow(FALSE);
myDlg.DoModal();
}

...I get an "Debug Assertion Failed" error which I understand because the dialog box has not been created yet (the DoModal() method does it).

If I put my initialisation commands in the CMyDialog::OnInitDialog() function it works BUT this function is called each time the dialog is displayed so my changes are lost each time the dialog is displayed.
- How can I just iniitalise these controls ONCE when the program starts ?

- How can I create my second dialog once ? and then reuse it as long as the program lives ?

Thanks.

 

[Zyrenthian]

Add the initialization stuff to the constructor so you can do :

CMyDialog myDlg("Title","Blah blah blah", ...);

Matt

 

[oxie]

Thank you.
It almost works like I want it to.
In the "child" dialog box I have some checkboxes that I want enabling or disabling.
Unfortunately the EnableWindow(TRUE/FALSE) method fails for the same reasons.

Thanks for your advices.
-Philippe.

 

[VincentP]

What you should do here is add some member variable to your dialog, such as

BOOL m_bCheckBoxEnabled

which you set to true or false (by passing an argument in the constructor, accessing the variable directly, whatever)

and add a Message Handler for WM_INITDIALOG. In the OnInitDialog function, enable or disable the check box using the value of m_bCheckBoxEnabled.

In short, this kind of control initialisation must be done after the window is created (e.g. in OnInitDialog)

Good luck

Vincent

 

[oxie]

Great !!
It works perfectly now.
Thank you very much