Listbox multi select problem [modified] - C / C++ / MFC Discussion Boards

rp_suman16-Jul-07 5:08

16-Jul-07 5:08

I am using midiOutLongMsg() to send message to H/W through MIDI port and H/W is sending the acknowledgement through same port.
I am having doubt, the WindowProc() function I am using for getting acknowlegement from H/W is missing some message. Is there chance for WindowProc() missing MIDI message? If so, how to increase the precision?
Best Regards,
Suman

Re: WindowProc() precision

Mark Salsbery16-Jul-07 5:22

Mark Salsbery

16-Jul-07 5:22

rp_suman wrote:
and H/W is sending the acknowledgement through same port

WindowProcs don't get messages from a "port". Is there some driver that's getting the
acknowledgement and sending/posting a message to a window?

Are you using Windows Multimedia APIs??

Mark

Mark Salsbery
Microsoft MVP - Visual C++

"Great job team! Head back to base for debriefing and cocktails."

Re: WindowProc() precision

rp_suman16-Jul-07 21:32

rp_suman

16-Jul-07 21:32

I am not sure, but the USB driver may get the message and broadcast.
Application is getting the message MM_MIM_LONGDATA when acknowledgement comes from H/W.
The code for opening the MIDI port is:

MMRESULT mReturnCode=MMSYSERR_NOERROR;  <br />
CWnd* pMainDialog = (CWnd*)AfxGetApp()->m_pMainWnd;<br />
HWND hWnd = pMainDialog->m_hWnd;<br />
mReturnCode = midiInOpen(&hdlMidiIn,uhInID,(DWORD)((LONG_PTR)hWnd),(DWORD)NULL,CALLBACK_WINDOW|MIDI_IO_STATUS);

My application is Dialog-based.
Best Regards,
Suman

Re: WindowProc() precision

Mark Salsbery17-Jul-07 5:28

Mark Salsbery

17-Jul-07 5:28

You stated you're using a windowproc? How are you doing this with an MFC window?

Have you tried getting the message in your maindialog class using the message map?

// Add to message map
ON_MESSAGE(MM_MIM_LONGDATA, OnMIMLongData)
...
// Handler method
LRESULT CMainDialog::OnMIMLongData(WPARAM wParam, LPARAM lParam)
{
   MIDIHDR *pMIDIHdr = (MIDIHDR *)lParam;
...
   return 0L;
}

Mark Salsbery
Microsoft MVP - Visual C++

"Great job team! Head back to base for debriefing and cocktails."

Re: WindowProc() precision

rp_suman17-Jul-07 19:53

rp_suman

17-Jul-07 19:53

Mark Salsbery wrote:
You stated you're using a windowproc? How are you doing this with an MFC window?

The declaration is in Dialog's header file as follows:
virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam);
And the implementation is in Dialog's cpp file as follows:

LRESULT CYSPController1Dlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) <br />
{<br />
    ubyt    ubMidiData;<br />
    switch( message ) {<br />
        case MM_MIM_DATA:           <br />
		/*do nothing*/<br />
                break;<br />
        case MM_MIM_LONGDATA:       <br />
                ReceiveLongMsg( lParam );              <br />
                break;<br />
    }<br />
    return CDialog::WindowProc(message, wParam, lParam); <br />
}<br />

Mark Salsbery wrote:
Have you tried getting the message in your maindialog class using the message map?

Yes, I have also tried your suggestion but the result is same.
I confirmed the message is missing by running the USB monitoring software(Device Monitoring Studio by HHD), while printing the message from H/W in file by MFC application. the monitoring tool getting all the messages from H/W but the application is missing a single message. I am looking in the problem. Thanks for your great help.
Best Regards,
Suman

Re: WindowProc() precision

rp_suman17-Jul-07 22:01

rp_suman

17-Jul-07 22:01

Functionality of WindowProc() and message map seems same, but is there any difference between them?
Best Regards,
Suman

Re: WindowProc() precision

Mark Salsbery18-Jul-07 5:47

Mark Salsbery

18-Jul-07 5:47

Overriding the WindowProc method is fine but generally with MFC apps you'd use the message
map mechanism.

Either way, if your window isn't getting the message then the problem is elsewhere. Smile | :)

Mark

Mark Salsbery
Microsoft MVP - Visual C++

"Great job team! Head back to base for debriefing and cocktails."

Listbox multi select problem [modified]

pirat316-Jul-07 4:53

pirat3

16-Jul-07 4:53

Hey guys, I have a form with two list boxes on it, both are inside a scroll box. I have multi select on, as I need the user to be able to click and drag the mouse to select multiple items without holding ctrl or shift. If I select any item in listbox #1, then select one in listbox #2, scroll down so neither are visible any longer. Now, if I click on anything that's not in the same listbox that was last clicked, (ie following the example above I click on an item in listbox #1 after scrolling down), the scroll box (which the listboxes are in) automatically scrolls all the way to the top, highlighting every item in that listbox from the one I clicked up to the item that is at the same mouse position as before scrolling. I believe it is a problem with losing focus, and I tried doing

On Mouse Down: ListBox->SetFocus(), but that didn't help (don't know if that's the right format). Any help would be appreciated, sorry if this is a really simple question. Thanks,

I found out the exact problem (I think)...now...just how to fix it :P The focus changes from one listbox to the next when it's clicked (both are within the scroll box). I need a way to have two separate focuses (foci?), one for each listbox. And when the scroll box moves all the way up, it's always a set amount : the number of times you clicked down (so...the number of vertical increments). So if I select something in one of the listboxes, then click one something in the other, then scroll down twice. After clicking on the first listbox, the scroll bar will move 2*increment of the scroll bar up and select all items within that range, in that listbox.

Alex

-- modified at 6:46 Tuesday 17th July, 2007

(ActiveX) Control in VC++6 as collection of Controls?

Andy Rama16-Jul-07 4:46

Andy Rama

16-Jul-07 4:46

Hi to all,

How to create a (ActiveX) Control in VC++6 as collection of multiple MFC Controls?

I want to create a (ActiveX) Control that can have a 2 Static Control, 1 EditBox & multiple Buttons in it. And using that (ActiveX) Control, i want to create multiple instaces of it on Dialog.

Setting Dialog Control Focus

MRCres16-Jul-07 4:25

MRCres

16-Jul-07 4:25

The following MFC code calls my own OnInitDialog function which in turn sets focus to my dialog window's first control and then returns a boolean value of FALSE. However, the focus is NOT set and tabbing fails when my dialog page appears. WHY?????? Is there a problem with MFC?

The focus setting works when a dialog in initiated via the MFC "DoModal()" command.

Thank you for your assistance.

/////////////////////////////////////////////////////////////////////////////
// AfxDlgProc - does nothing since all messages are handled via AfxWndProc

INT_PTR CALLBACK AfxDlgProc(HWND hWnd, UINT message, WPARAM, LPARAM)
{
if (message == WM_INITDIALOG)
{
// special case for WM_INITDIALOG
CDialog* pDlg = DYNAMIC_DOWNCAST(CDialog, CWnd::FromHandlePermanent(hWnd));
if (pDlg != NULL)
return pDlg->OnInitDialog();
else
return 1;
}
return 0;
}

Michael A. Rinaldi

Double posting

leckey16-Jul-07 4:30

leckey

16-Jul-07 4:30

You do not need to post your question more than once. Please read the forum guidelines.

_____________________________________________
Flea Market! It's just like...it's just like...A MINI-MALL!

Re: Setting Dialog Control Focus

Stephen Hewitt16-Jul-07 14:27

Stephen Hewitt

16-Jul-07 14:27

See here[^]. In short calling SetFocus should not be calling in dialogs: instead WM_NEXTDLGCTL should be used.

Steve

Setting Dialog Control Focus

MRCres16-Jul-07 4:21

MRCres

16-Jul-07 4:21

Michael A. Rinaldi

Re: Setting Dialog Control Focus

Mark Salsbery16-Jul-07 5:52

Mark Salsbery

16-Jul-07 5:52

Showing the MFC code doesn't really help us Smile | :)

What are you doing in your derived class OnInitDialog? How are you setting focus to a control?

Mark

Mark Salsbery
Microsoft MVP - Visual C++

"Great job team! Head back to base for debriefing and cocktails."

Re: Setting Dialog Control Focus

MRCres16-Jul-07 9:34

MRCres

16-Jul-07 9:34

Mark:

Sorry about that.

Here's my app's function that's called by the MFC code. I'm adding my own supplementary comments.

BOOL CSetupDlgMyApp::OnInitDialog()
{
CDialog::OnInitDialog();

UpdateMyNames(); // updates class object parameters

GetDlgItem(IDC_RENAME_ACCOUNT)->SetFocus(); // Here I'm trying to set my dialog page's
// focus to its first control

return FALSE; // return TRUE unless you set the focus to a control
// EXCEPTION: OCX Property Pages should return FALSE
}

Thank you for your assistance.

Michael A. Rinaldi

Michael A. Rinaldi

Re: Setting Dialog Control Focus

Mark Salsbery16-Jul-07 9:40

Mark Salsbery

16-Jul-07 9:40

Maybe try this instead:

//GetDlgItem(IDC_RENAME_ACCOUNT)->SetFocus(); // Here I'm trying to set my dialog page's
GotoDlgCtrl(GetDlgItem(IDC_RENAME_ACCOUNT));

Mark

Mark Salsbery
Microsoft MVP - Visual C++

"Great job team! Head back to base for debriefing and cocktails."

Re: Setting Dialog Control Focus

David Crow16-Jul-07 10:22

David Crow

16-Jul-07 10:22

MRCres wrote:
GetDlgItem(IDC_RENAME_ACCOUNT)->SetFocus(); // Here I'm trying to set my dialog page's
// focus to its first control

Is IDC_RENAME_ACCOUNT the first non-static control in the dialog's z-order?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: Setting Dialog Control Focus

MRCres17-Jul-07 2:43

MRCres

17-Jul-07 2:43

Yes, it is.

Michael A. Rinaldi

Re: Setting Dialog Control Focus

David Crow17-Jul-07 2:46

David Crow

17-Jul-07 2:46

Then there's no need to call SetFocus() or return FALSE.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: Setting Dialog Control Focus

MRCres23-Jul-07 6:14

MRCres

23-Jul-07 6:14

Focus is being set to the first control upon dialog activation and initialization; however, tabbing is inoperative until one touches the first control to activate the subdialog. After the subdialog is opened and closed, tabbing works on the dialog controls.

Although tab controls and ordering are set in the MFC resource editor, why is tabbing not working and inoperative upon dialog window initialization and activation?

(Note that the window display occurs on a touch panel screen whereby the touching of a button is handled like a LEFT MOUSE DOWN\UP command.)

Thank you for your assistance.

Michael A. Rinaldi

FlashWindowEx useage

minkowski16-Jul-07 4:17

minkowski

16-Jul-07 4:17

Hi,

I am trying to use this function

<br />
CWnd::FlashWindowEx()<br />

in my CMainFrm class but it cannot compile returning the error

error C2065: 'FlashWindowEx' : undeclared identifier

However, if I use

<br />
CWnd::FlashWindow()<br />

It is ok. Does anyone know why the call to CWnd::FlashWindow() does not work ?

Thanks.

ps I have ommitted the arguements in this post.

Re: FlashWindowEx useage

CPallini16-Jul-07 4:48

CPallini

16-Jul-07 4:48

Maybe you have an old version of MFC (for instance, VS6 MFC doesn't have the CWnd::FlashWindowEx method while it has the CWnd::FlashWindow one). As workaround, try to use the Win32 FlashWindowEx function.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

Re: FlashWindowEx useage

Michael Dunn16-Jul-07 6:53