Show CDialog with identifier

[Casiopea]

Hi! My question is that I would like to open a CDialog using the ID associated to the window it shows; I mean, I've got several forms, each one belongs to a CDialog class, and I see for instance that one of then has the IDD_DATETOWN_DIALOG=105 and depending on the information I've got I decide to show it, then I was thinking about using
CDialog * dlg=(CDialog *) GetDlgItem(IDD_DATETOWN_DIALOG)
dlg->DoModal()
as I do if I declare an object of the class DateTown and show it with DoModal(); but doing it through the identifier it gives me a severe error and break the program
THANK YOU,

 

[obislavu]

The DoModal() function creates the dialog box.
The GetDlgItem() function assumes the dialog exists!
There are many ways to create a dialog box and here is one:
CMyDialog dlg = new CMyDialog();
dlg.DoModal();

Now you can query a pointer to this control by :

CMyDialog * p=(CMyDialog *) GetDlgItem(IDD_DATETOWN_DIALOG);
if (p)
{
p->LoadDateTown();
}
-obislavu-

 

[Casiopea]

The point is that I have many classes derived from CDialog (one for each form) and what I would like is to load the form through the identifier which is defined inside the class:
class DATETOWN{
..
enum IDD=IDD_DATETOWN
..
}
In the normal order of my application I call it through:
CDatetown m_date();
m_date.DoModal();
//Another form
CShop m_shop();
m_shop.DoModal();
But there's another order, and I would like to avoid writting a function to switch through the identifiers and load the appropriate Form, I mean
switch(id){
case 105:
CDatetown m_date();
m_date.DoModal();
case 106:
CShop m_shop();
m_shop.DoModal();
... and so on for all the rest of forms
it is much easier if I take the identifier from a database I have constructed in which I keep the last form filled and load the form some way, if exists. Any tip? Thank you

 

[obislavu]

CMapStringToPtr map;
map.SetAt("town", new CTownDlg);
map.SetAt("shop",new CShopDlg);
....
//
Now retrieve the name of the last form from your database:
CString lastForm = "shop";
ShowDialog(lastForm); will creates the the corresponding dialog.


void ShowDialog(const CString &rKey)
{
CDialog *pDlg = NULL;
if( map.Lookup( rKey, (CObject *&)pDlg ) )
pDlg->DoModal();

}


To find out the class of the displayed dialog use RUNTIME_CLASS macro like here:

if(pDlg->IsKindOf( RUNTIME_CLASS( CTownDlg ) ) )
{
// This dialog is a CTownDialog
CTownDlg *p1 = (CTownDlg *)pDlg;
// ...
}

-obislavu-