We help IT Professionals succeed at work.

We've partnered with Certified Experts, Carl Webster and Richard Faulkner, to bring you a podcast all about Citrix Workspace, moving to the cloud, and analytics & intelligence. Episode 2 coming soon!Listen Now

x

CSliderCtrl notifications

biss
biss asked
on
Medium Priority
892 Views
Last Modified: 2013-11-19
I have a dialogbar  with a slider control in it. Using ClassWizard, I added
handlers for the notification messages I was interested in.
I want those notifications to be handled by the CMainframe class owning the CDialogbar.

None of the notifications messages are dispatched for CsliderCtrl controls.  Also, I noticed that Windows is sending for example a WM_SETFOCUS message and not a NM_SETFOCUS message.  And even if it's a WM_SETFOCUS message, I can't trap it.

Do I need to add something to my code in order to ensure that the
notification messages are actually sent? Or do I need to add something to
the message map to handle the WM_ messages being sent to the control?  I would like to be able to trap WM_HSCROLL too wenever the user slides the track bar.

Best Regards,

Charles Bissonnette

Comment
Watch Question

Commented:
A slider control notifies its parent window of user actions by sending the parent WM_HSCROLL messages. In your case, the parent window of the slider control is the CDialogbar. You should override CDialogbar::OnHScroll member function to transfer the message to the CMainframe.
void CDialogbar::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
    ::AfxGetMainWnd()->PostMessage(WM_HSCROLL, MAKEWPARAM(nSBCode, nPos), LPARAM(pScrollBar->GetSafeHwnd()));
}

Not the solution you were looking for? Getting a personalized solution is easy.

Ask the Experts

Author

Commented:
Thanks ,
 
I though every messages dispatched by a cdialogbar class were  routed directly to his host parent class.

Right now I catch the WM_NOTIFY messages and It seems to work fine, but it's very a pain in the neck since every messages are not only sent when you slide the track bar, but also every time  I lost the focus on the control.  This adds overhead for nothings.

And thanks for you tips,

Charles


Access more of Experts Exchange with a free account
Thanks for using Experts Exchange.

Create a free account to continue.

Limited access with a free account allows you to:

  • View three pieces of content (articles, solutions, posts, and videos)
  • Ask the experts questions (counted toward content limit)
  • Customize your dashboard and profile

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.