PRB: Returning FALSE from OnSetActive Doesn't Set Correct Tab (145864)
The information in this article applies to:
- The Microsoft Foundation Classes (MFC), when used with:
- Microsoft Visual C++, 32-bit Professional Edition 4.0
- Microsoft Visual C++, 32-bit Learning Edition 4.0
This article was previously published under Q145864 SYMPTOMS
To disallow activation of a CPropertyPage, you are supposed to be able to
return FALSE from OnSetActive(). This causes the next page to be activated
instead of the one the user clicked. This works fine as long as there is a
next page and the next page returns TRUE from OnSetActive(). If the next
page is not available, the tab you clicked will be activated but the page
still points to the previous one. In other words, the tab that is activated
doesn't match the page. Furthermore, the OnSetActive() function is called
an additional ten times.
CAUSE
Returning FALSE from OnSetActive() prompts MFC to return a -1 from
PSN_SETACTIVE. The PropertySheet control doesn't handle this correctly when
the next tab is not available.
RESOLUTION
In OnSetActive(), post a message of PSM_SETCURSEL to activate a different
page. Then return TRUE.
Sample Code
// CPage1 is derived from CPropertyPage
BOOL CPage1::OnSetActive()
{
// always activate the first page instead
GetParent()->PostMessage (PSM_SETCURSEL, 0);
return CPropertyPage::OnSetActive();
}
/* Compile options needed: default
*/
STATUS
This behavior is by design.
| Modification Type: | Major | Last Reviewed: | 11/18/2003 |
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| Keywords: | kbcode kbprb kbPropSheet KbUIDesign KB145864 |
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