CFileDialog OnTypeChange issue

_Flaviu

I derived a class from CFileDialog, named CFileDialogExt. Here, I have the following filters: 1.bmp 2.gif 3.jpg 4.png 5.tiff In order to setup the right extension for file name, I override OnTypeChange, just like this:

void CFileDialogExt::OnTypeChange()
{
// TODO: Add your specialized code here and/or call the base class

switch(GetOFN().nFilterIndex)
{
case 1:
	SetDefExt(\_T("bmp"));
	break;
case 2:
	SetDefExt(\_T("gif"));
	break;
case 3:
	SetDefExt(\_T("jpg"));
	break;
case 4:
	SetDefExt(\_T("png"));
	break;
case 5:
	SetDefExt(\_T("tiff"));
	break;
}

CFileDialog::OnTypeChange();

}

Default type is bmp. So, I type "aaa" as file name. Then, I change the type (from combo type), as gif. The file name is still "aaa". Then, I change again as jpg, the file name is changed as "aaa.gif" !! Is delayed by one changing ... strange ... why ? Furthermore, I change extension as tiff, the file name is "aaa.jpg", not "aaa.tiff" .... I have done something wrong here ?

_Flaviu

Maybe if I could get a pointer to CComboBox from CFileDialog, I can find more about this problem ... but I can not ... I tried this:

void CFileDialogExt::OnTypeChange()
{
// TODO: Add your specialized code here and/or call the base class

CString sTemp;
CComboBox\* pCombo = (CComboBox\*)GetDlgItem(cmb1);
if(NULL != pCombo->GetSafeHwnd())
{
	int nIndex = pCombo->GetCurSel();
	if(CB\_ERR != nIndex)
		pCombo->GetLBText(nIndex, sTemp);
}

TRACE(">>>%s\n", sTemp);
switch(GetOFN().nFilterIndex)
{
case 1:
SetDefExt(_T("bmp"));
break;
case 2:
SetDefExt(_T("gif"));
break;
case 3:
SetDefExt(_T("jpg"));
break;
case 4:
SetDefExt(_T("png"));
break;
case 5:
SetDefExt(_T("tiff"));
break;
case 6:
SetDefExt(_T("dcm"));
break;
}

CFileDialog::OnTypeChange();

}

but pCombo seem to be null ...

Maximilien

We do something similar. In the OnTypeChange virtual method: We have a external list of extension (external to the file dialog) We get the selected filter extension (m_ofn.nFilterIndex). We get the current filename (GetFileName()) Extract the filename without extension and replace with the new extension and call this :

// This only works is the bVistaStyle flag is set to false in the CFileDialog constructor.
SetControlText(edt1, fileNameNoExtension ); // edt1 is undocumented.

This will change the name of the file in the file dialog editbox. Good luck.

I'd rather be phishing!

_Flaviu

Yes, there is a solution, but the file dialog has an old style ...