Re: frozen combobox - C / C++ / MFC Discussion Boards

Anonymous8-Oct-02 8:58

8-Oct-02 8:58

Well, I remember from my poor Win32 experience that you get a WM_SIZE after the control is created... so overriding OnSize() might be enough?

Propably someone can confirm this? Or is there any other message handler to override and call GetClientRect()?

Re: Keeping track of control width (?)

Roger Allen9-Oct-02 1:48

Roger Allen

9-Oct-02 1:48

Initially you will recieve a WM_SIZE before the control is created, and one after the control is created. You could do the following:

static bool first = true ;
if (GetDlgItem(IDC_OF_CONTROL) != NULL && first)
{
// this code will only be executed once.
CRect size ;
GetDlgItem(IDC_OF_CONTROL)->GetWindowRect(&size) ;
first = false ;
// do something with the initial size of the control
}

Roger Allen
Sonork 100.10016

I think I need a new quote, I am on the prowl, so look out for a soft cute furry looking animal, which is really a Hippo in disguise. Its probably me.

Re: Keeping track of control width

BlackSmith8-Oct-02 9:35

BlackSmith

8-Oct-02 9:35

Try reading here: CWnd::OnGetMinMaxInfo

--BlackSmith--
/*The roof is on fire, we don't need no water, let the MF burn*/. BHG.

Re: Keeping track of control width

Anonymous8-Oct-02 9:54

Anonymous

8-Oct-02 9:54

sorry, I dont get the relation to my question about current control size, which is a client window (a listbox) of a dialog.

Meanwhile I tried with OnSize(), but OnSize() gets called to late. I need to catch the width somewhere earlier, right after the control is created....

Re: Keeping track of control width

8-Oct-02 10:20

Overwriting OnCreate() brought no luck... so I found this one:

void CListBoxLovely::PreSubclassWindow() 
{
	CListBox::PreSubclassWindow();
	CRect rect;
	GetClientRect(rect);
	m_nItemWidth = rect.Width()
}

it works good Smile | :)

frozen combobox

ns8-Oct-02 8:01

8-Oct-02 8:01

This brings up the UI and nothing can be done to it. Cant input anything in the combobox. THe UI is totallly unresponsive to anything:

BOOL CCombobox1View::PreTranslateMessage(MSG* pMsg) 
{

       CString s;

	if   ( pMsg->message == WM_KEYDOWN && pMsg->wParam == VK_RETURN )

		if 	(GetFocus() ==& m_combo1)  
		{
			m_combo1.GetWindowText(s);

			m_combo1.InsertString(0,s);
			m_combo1.SetWindowText("");
			m_combo1.SetFocus();
		//	EndDialog(IDOK);

			
			
			return FALSE; 
		}
		else
		{
	
		}
		

	else
	{ 
		return TRUE;
	}


	return CFormView::PreTranslateMessage(pMsg);
}

Appreciate your help,
ns

Re: frozen combobox

ns8-Oct-02 8:05

8-Oct-02 8:05

I'm just trying to check out the basic functionality of a combobox. I thought that with the code above< I could enter something, then dropdown the box and see it in the list...

Appreciate your help,
ns

Re: frozen combobox

Roger Allen9-Oct-02 1:53

Roger Allen

9-Oct-02 1:53

Its probably due to the if(pMsg->) else condition. you should just miss this section out of the function.

BOOL CCombobox1View::PreTranslateMessage(MSG* pMsg)
{
       CString s;
	if   ( pMsg->message == WM_KEYDOWN && pMsg->wParam == VK_RETURN )
	{
		if 	(GetFocus() ==& m_combo1)
  		{
			m_combo1.GetWindowText(s);
			m_combo1.InsertString(0,s);
			m_combo1.SetWindowText("");
			m_combo1.SetFocus();
		//	EndDialog(IDOK);									return FALSE;
 		}
		else
		{
		}
	}
	return CFormView::PreTranslateMessage(pMsg);
}

Roger Allen
Sonork 100.10016

I think I need a new quote, I am on the prowl, so look out for a soft cute furry looking animal, which is really a Hippo in disguise. Its probably me.

Re: frozen combobox

Bartosz Bien10-Oct-02 11:31

Bartosz Bien

10-Oct-02 11:31

Modifying the UI in PreTranslateMessage may be unsafe. I guess you should move the presented functionality to OnKeyDown (WM_KEYDOWN handler). Additionally, to make OnKeyDown being called for VK_RETURN, you should override OnGetDlgCode (WM_GETDLGCODE handler) to return DLGC_WANTALLKEYS constant.

Regards,
Bartosz Bien

How do I fix this?

ns8-Oct-02 7:47

8-Oct-02 7:47

My Cdialog has two CEdits. THe default ONOK has no code in it (I'm trying to prevent enter from killing the dialog), THe way things are, the Done button has third tab order (after the CEDits) and does an EndDialog. For some reason, Enter is dismissing the dialog even though the default ONOK is empty. I need to prevent this behavior, but the standard method is not working. I even made a label be third tab order just in case.But the enter still dismisses the dialog ?This has worked before (emptying OnOK) but this time it isnt and I dont know why..

Appreciate your help,
ns

Re: How do I fix this?

C^hris L^osinger8-Oct-02 7:55

C^hris L^osinger

8-Oct-02 7:55

PreTranslateMessage

search this forum for it.

-c

No matter how fast light travels it finds the darkness has always got there first, and is waiting for it.
-- Terry Pratchett,

Etch-a-sketch!

Re: How do I fix this?

ns8-Oct-02 8:02

8-Oct-02 8:02

Thats what I ended up doing...I had saved a link to it... Smile | :)

Appreciate your help,
ns

Re: How do I fix this?

mariuszpopiolek8-Oct-02 8:02

mariuszpopiolek

8-Oct-02 8:02

Hi
I'm not sure whether it will help but try it. Do not delete default ONOK handler. If I remember well there should be line with OnOk() or something like this. Comment this line.

Greetings

Mariusz Popiolek

Re: How do I fix this?

ns8-Oct-02 8:08

8-Oct-02 8:08

I didnt delete it. I just commented out that base class calll like you said...

Appreciate your help,
ns

Re: How do I fix this?

mariuszpopiolek8-Oct-02 8:15

mariuszpopiolek

8-Oct-02 8:15

And what? Did it help? (I suppose not Frown | :(

)

Greetings

Mariusz Popiolek

Re: How do I fix this?

ns8-Oct-02 8:21

8-Oct-02 8:21

Nope> But I've used Pretranslate message and thats okay for the moment....so thanks for the interest.. Smile | :)

Appreciate your help,
ns

Re: How do I fix this?

mariuszpopiolek8-Oct-02 8:42

mariuszpopiolek

8-Oct-02 8:42

Now I tried this in VC to be sure Smile | :)

. I double-clicked ok button so I obtain such autogenerated code:

void CMy123testappDlg::OnOK()
{
// TODO: Add extra validation here

CDialog::OnOK();
}

And after commenting CDialog::OnOK(); pressing Ok button does nothing! (dialog doesn't close). So it must help, or maybe we have a little misunderstanding Smile | :)

(maybe your problem is a bit different).

Greetings

Mariusz Popiolek

Re: How do I fix this?

ns8-Oct-02 9:12

8-Oct-02 9:12

I agree that pressing the OK after commenting out the line is unresponsive. I'm however hitting the enter key. Its probably got something to do with my tab order, but I only have two CEdits and 1 OK, 1 cancel to organize.....

Appreciate your help,
ns

Re: How do I fix this?

mariuszpopiolek8-Oct-02 10:04

mariuszpopiolek

8-Oct-02 10:04

Maybe you have screwed something. As far as I know hitting enter key and pressing the button using the mouse does exactly the same (launch BN_CLICKED handler). I don't think that tab order has something to do here. Handling this by messing with PreTranslateMessage is not quite elegant, my solution should work, just try to find the bug (easy to say I know)

greetings

Mariusz Popiolek

Re: How do I fix this?

l a u r e n8-Oct-02 13:42

l a u r e n

8-Oct-02 13:42

pretranslatemseeage is cool cos u can prevent the esc key closing ur dialog too if u want Smile | :)

"... and so i said to him ... if it don't dance (or code) and you can't eat it either f**k it or throw it away"
biz stuff about me

Re: How do I fix this?

Roger Allen9-Oct-02 1:56

Roger Allen

9-Oct-02 1:56

One standard way I use to stop the OK button closing the dialog unless it has the focus is:

void CMyDialog::OnOK()
{
	if (GetFocus() == GetDlgItem(IDOK))	// only close if control has focus
		EndDialog(IDOK) ;
}

Roger Allen
Sonork 100.10016

I think I need a new quote, I am on the prowl, so look out for a soft cute furry looking animal, which is really a Hippo in disguise. Its probably me.

great! Thanks!

ns9-Oct-02 2:53

9-Oct-02 2:53

Thats a great trick! Thank you so much! This does mean however , that the ok button HAS to be pressed to exit, right? I wanted Enter to exit me too, but only if I had written into an CEdit...
But your solution looks good, so thank you very much!

Appreciate your help,
ns

Control Panel

Anonymous8-Oct-02 7:14

Anonymous

8-Oct-02 7:14

Does anyone know how to add features to an existing control panel applet? I am writing a program that includes features closely tied with the properties of the Telephone applet of windows, and I would like to add to the property sheet or append a dialog to the existing dialog. Any idea how I might approach this problem?

Re: Control Panel

Michael P Butler8-Oct-02 7:56

Michael P Butler

8-Oct-02 7:56

The Telephony applet (Phone/Modem options) is controlled via TAPI.

The function lineTranslateDialog is used to display this dialog in your own application. It is possible to add custom pages via the TSPI for a telephony device.

From MSDN

Assume for the purposes of an example that the application calls the TAPI lineConfigDialog function, which is designed to open a dialog box to allow configuration of service provider options related to the specified line device. In response to this call, TAPI requests TAPISRV to call TSPI_providerUIIdentify in the telephony service provider, obtaining the name of the TSP UI DLL.

In the application's context, TAPI loads the TSP UI DLL and calls the TUISPI_lineConfigDialog function with the parameters supplied by the application, and including a pointer to the TAPI TUISPIDLLCALLBACK function. The TSP UI DLL displays the configuration dialog box, calling the TUISPIDLLCALLBACK function as necessary to obtain from the telephony service provider the information to display. Each time the TUISPIDLLCALLBACK function is called, TAPI requests TAPISRV to call the telephony service provider's TSPI_providerGenericDialogData function, passing in the parameter block from the UI DLL, and returning the parameter block to the UI DLL. The UI DLL conveys any configuration changes to the telephony service provider by calling TUISPIDLLCALLBACK.

When the function is complete, the UI DLL returns from (in this case) TUISPI_lineConfigDialog. TAPI calls the Win32 FreeLibrary function to release the UI DLL, and returns to the application.

Michael

"I've died for a living in the movies and tv.
But the hardest thing I'll ever do is watch my leading ladies,
Kiss some other guy while I'm bandaging my knee."
-- The Unknown Stuntman

Re: Control Panel

Anonymous8-Oct-02 10:19

Anonymous

8-Oct-02 10:19

Thanks Michael! I'll have to study it for a while before I can tell if it would be useful to me. Can you tell me where the MSDN article comes from and where I might find other resources or the sort? thanks!

-Leo
http://LessExpense.tripod.com

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