C / C++ / MFC

Re: set focus to a control problem on win32 dialogs

15-Nov-08 2:55

we set focus to a control by sending WM_NEXTDLGCODE to it but in the case

1- the control is a button, check box or radio box
2- the dialog is opened by clicking a menu item by mouse and not keyboard
3- the user has not pressed TAB yat.

if we set focus to a button check box or radio box by code, the focus rectangle around the control text is not displayed and if the control has BS_NOTIFY style, the border is not darkened and user can not see which control has the focus.

is there any other methode to set focus to a control by code? or am I mistaken in some way?

I program with visual studio 9
Thanks

modified on Saturday, November 15, 2008 9:05 AM

Code-o-mat15-Nov-08 3:36

Code-o-mat

15-Nov-08 3:36

SetFocus?

Re: set focus to a control problem on win32 dialogs

abdolahzadeh16-Nov-08 2:43

Re: set focus to a control problem on win32 dialogs

16-Nov-08 2:43

No, SetFocus is not the correct answer. According to MSDN, WM_NEXTDLGCODE does things far beyond SetFocus, such as redrawing pushbutton border, and updating button`s push state and focus state.

Thanks for your reply
Abzadeh

Mark Salsbery15-Nov-08 7:27

Mark Salsbery

15-Nov-08 7:27

abdolahzadeh wrote:
WM_NEXTDLGCODE

WM_NEXTDLGCTL is the message to use.

If it's not working, then you're sending the message from the wrong place
or using the wrong wParam/lParam parameters.

From where and how are you sending the message?

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: set focus to a control problem on win32 dialogs

abdolahzadeh16-Nov-08 2:39

Re: set focus to a control problem on win32 dialogs

16-Nov-08 2:39

I sent WM_NEXTDLGCTL message properly, and it was proven that this is a bug of win32. I tested this problem on the Sample created by visual studio and added only one button control and one check box, and the problem was there. and I noticed that an exe created by vc9 MFC opened by clicking on exe and not by ENTER had the same problem. I worked arround the problem by sending TAB to dialog artificially when the dialog is created and solved the problem.

Thanks for your notice and interest
Abzadeh

Mark Salsbery16-Nov-08 6:05

Mark Salsbery

16-Nov-08 6:05

abdolahzadeh wrote:
proven that this is a bug of win32

By who? Have a link?

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: set focus to a control problem on win32 dialogs

abdolahzadeh18-Nov-08 3:51

Re: set focus to a control problem on win32 dialogs

18-Nov-08 3:51

I found that this may be designed intentionally by microsoft. to prove this, create a simple dialog that contains a push buttom, check box or radio box as the first control and create exe file. no ocde modification is needed. now run exe by clicking mouse and not keyboard, you see that the focus rectangle is not present and by pressing TAB or ALT key it appears. now run exe using keyboard and not mouse. the focus rectangle is present. this makes no problem unless the TAB key is controlled by the application returning DLGC_WANTTAB to WM_GETDLGCODE message(subclassing) or the application sets focus to controls by using WM_NEXTDLGCTL. and if there is a lot of push buttons and the user has openned the dialog by mouse and wants to use keyboard to navigate, he or she wonders which control has the focus. using TAB does not restore focus rectangle beacuse the application processes TAB and only sends WN_NEXTDLGCTL to the dialog.

Is there any way to bypass this behavier of controls?(draw focus rectangle even if the dialog is openned by mouse)

Thanks
Abzadeh

Phil Outram20-Sep-10 11:02

Phil Outram

20-Sep-10 11:02

Here's a solution I've finally found that nails this problem...phewph. It was on MSDN.itags.org at http://visual-c.itags.org/visual-c-c++/49186/[^] and is provided by Jeff Partch [MVP] - thanks so much Jeff!!

On Win2k and up, the focus rect is hidden by default until you do things like: 1) Tabbing with the keyboard, 2) Hit the ALT key, or 3) Invoke the dialog with the keyboard in the first place. The WM_UPDATEUISTATE may explain it better than I do, but if I add a PostMessage of it to your OnInitDialog...

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

m_button.Create(_T("Hello"), WS_CHILD|WS_VISIBLE|WS_TABSTOP|BS_AUTOCHECKBOX, CRect(10,10,100,30), this, 10000);

GotoDlgCtrl(&m_button);

PostMessage(WM_UPDATEUISTATE, MAKEWPARAM(UIS_CLEAR, UISF_HIDEFOCUS));

return FALSE;
}

...it'll circumvent the expected behavior (which may not be a good thing, but that's your call). It
does do for me anyway. To get these 'UISTATE' defines you need to have the latest (or later than
that which ships with VC6) PSDK installed, and 2) You need to have defined (_WIN32_WINNT >= 0x0500)
way early in the build process. Personally, I think this conditional around a Window's message and
its parameter values is an error in judgement. Anyway, both these can be a real pain, so FWIW...

#ifndef WM_UPDATEUISTATE
#define WM_UPDATEUISTATE 0x0128
#endif
#ifndef UISF_HIDEFOCUS
#define UISF_HIDEFOCUS 0x1
#endif
#ifndef UIS_CLEAR
#define UIS_CLEAR 2
#endif

--
Jeff Partch [MVP]

SetRegistryKey problem, when uninstalling

followait15-Nov-08 0:51

followait

15-Nov-08 0:51

MFC calls SetRegistryKey in InitInstance,
and it'll create a key under HKEY_CURRENT_USER.
If different user run the same application, there will be two different entries created.
How to delete the two entries when uninstalling?

Re: SetRegistryKey problem, when uninstalling

22491715-Nov-08 17:38

224917

15-Nov-08 17:38

This is a windows issue (not MFC) and I don't think windows provide any solution for this. While you uninstall your application, clean all the CURRENT_USER's datas (which I think you are already doing) and can ignore other users. I remember this was suggested by Microsoft while I had attended a hands on lab at one of their Bangalore facility few years back.

-Suhredayan

Re: SetRegistryKey problem, when uninstalling

followait15-Nov-08 18:46

followait

15-Nov-08 18:46

When using VC++ 2008 feature pack, there is a problem for this,
if I change the toolbar, I have to delete the entries in the registry,
or else the change will not take effect.

date and time

Russell^'15-Nov-08 0:18

Russell^'

15-Nov-08 0:18

Is there any default dialog window (like CFileDialog, CColorDialog...CDialog derived) to ask the user the desired date and time?
D'Oh! | :doh:

I'd like to use it in this way

CTime Time;
{
  CTimeDialog??? dlg;
  if(dlg.DoModal()==IDOK){
    Time=dlg.m_Time;
  }else{
    return;
  }
}

Needed something similar to the dialog that appears on double click on the win-xp clock (trayicon)

Russell

Re: date and time

Hamid_RT15-Nov-08 1:44

15-Nov-08 1:44

Did you see The Ultimate Toolbox Date Time Picker Control[^]?

Re: date and time

Mark Salsbery15-Nov-08 7:40

Mark Salsbery

15-Nov-08 7:40

There isn't one in the Common Dialog Box Library[^].

There is a Date and Time Picker[^] common control available to use in your own dialogs.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Dll Not Found

Aabid15-Nov-08 0:00

15-Nov-08 0:00

Hello all

i am using VC++ (VS 6.0)
I want to link .lib file to my project ...
How to do it.

But when i put my .lib path in
"Project -> Settings -> Link -> input -> Object\Library modules"..

I didnt get any compilation or linking error .. but when i run the program i get the MessageBox as "Dll Not Found"

Any Sugesstion is really apppreciated..

regards
Aabid

Re: Dll Not Found

Hamid_RT15-Nov-08 1:45

15-Nov-08 1:45

Did you register your dll file?

Re: Dll Not Found

CPallini15-Nov-08 3:04

CPallini

15-Nov-08 3:04

You must be sure the corrensponding .dll (please note, not the .lib) file, is in the (Windows) dynamic library search path, see [^].
Smile | :)

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-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Open Excel and write

hellogany14-Nov-08 21:57

hellogany

14-Nov-08 21:57

Hi
I want to open an existing excel sheet and need to append data.
I m using vc++..giv me suggestions

Thanks
gany

Re: Open Excel and write

Hamid_RT14-Nov-08 22:57

CSpreadSheet - A Class to Read and Write to Excel and Text Delimited Spreadsheet[^].

14-Nov-08 22:57

Picture Erases

Aabid14-Nov-08 21:04

14-Nov-08 21:04

Hello All

i am working in Win32 VC++ using VS 6.0

My task is to display image on Desktop or Window .....I did it and works fine ....but the problem is when i move any other window over the image it erases the image

How to overcome this problem....
Any sugesstion is heartly appreciated..

regards
Aabid

Perspx14-Nov-08 22:18

Perspx

14-Nov-08 22:18

Where are you processing the image drawing functions?

Regards,
--Perspx

"A refund for defective software might be nice, except it would bankrupt the entire software industry in the first year."
-Andrew Tanenbaum

"Einstein argued that there must be simplified explanations of nature, because God is not capricious or arbitrary. No such faith comforts the software engineer."
-Fred Brooks

Aabid14-Nov-08 22:22

14-Nov-08 22:22

Thankx For ur Reply

case WM_PAINT:
{
hdc = BeginPaint(hwnd, &ps);
CxImage* newImage = new CxImage(); newImage->LoadResource(FindResource(NULL,MAKEINTRESOURCE(IDR_PNG1),
"PNG"),CXIMAGE_FORMAT_PNG);
newImage->Draw(hdc, 1, 1);
EndPaint(hwnd, &ps);
return 0;
}

Hamid_RT14-Nov-08 23:00

14-Nov-08 23:00

Maybe A C++ OCX for drawing pictures on any window of your Application[^] is helpful for you.

Aabid14-Nov-08 23:07