Re: Disable Move - C / C++ / MFC Discussion Boards

Neville Franks12-Oct-04 10:49

12-Oct-04 10:49

hyling wrote:
When I tried what you suggested, the CEdit field to stop accepting input at all? It does put the caret in the edit box when the dialog starts up though.

Have you specified the correct vaues for the PostMessage() wParam and lParam params. Look at WM_SETFOCUS in the Help for details.

Neville Franks, Author of ED for Windows www.getsoft.com and Surfulater www.surfulater.com "Save what you Surf"

Re: can't set input focus

hyling12-Oct-04 11:24

hyling

12-Oct-04 11:24

Would you explain why you said this: Calling SetFocus() in a dialog (or anywhere else) can be problematic. I couldn't find anything discussions about this with google.

Also, I could never get PostMessage to work right.

I tried this:

<br />
mIDField.PostMessage(WM_SETFOCUS, (WPARAM)m_hWnd, 0);<br />

According to the docs:

Parameters

-wParam
Handle to the window that has lost the keyboard focus. This parameter can be NULL.
-lParam
This parameter is not used.

Thanks
Hua-Ying

Re: can't set input focus

Neville Franks12-Oct-04 11:43

Neville Franks

12-Oct-04 11:43

hyling wrote:
Would you explain why you said this: Calling SetFocus() in a dialog (or anywhere else) can be problematic. I couldn't find anything discussions about this with google.

You can and do get into race conditions where your code is trying to SetFocus and Windows is also trying to SetFocus(). A common mistake people make where this is evident is validating a control in its OnKillFocus() handler and calling SetFocus() when it is invalid to set the focus back to the control loosing focus. This won't work because upon return from OnKillFocus() windows will set the focus to the next control etc. PostMessage() is a way to handle this scenario.

David has pointed out the correct answer however. Smile | :)

Neville Franks, Author of ED for Windows www.getsoft.com and Surfulater www.surfulater.com "Save what you Surf"

Re: can't set input focus

David Crow12-Oct-04 10:53

David Crow

12-Oct-04 10:53

When posting code snippets, it's beneficial to post them verbatim rather than typing them in manually. This is evident in the fact that you are returning a bool from a BOOL method.

Since OnInitDialog() is created by AppWizard or ClassWizard, you've no doubt noticed the comment that gets placed near the bottom of the OnInitDialog() method:

return TRUE;  // return TRUE unless you set the focus to a control

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: can't set input focus

hyling12-Oct-04 11:14

hyling

12-Oct-04 11:14

AppWizard didn't create a OnInitDialog function for this class, I had to add it in by hand and didn't see the comment before.

You're right, I should have been returning false for this function.

The following code works for me:

<br />
BOOL MyDialog::OnInitDialog() <br />
{<br />
	CDialog::OnInitDialog();<br />
	editField1.SetFocus();<br />
<br />
	return FALSE;<br />
}<br />

Thanks!
Hua-Ying

Re: can't set input focus

Neville Franks12-Oct-04 11:38

Neville Franks

12-Oct-04 11:38

Neville Franks, Author of ED for Windows www.getsoft.com and Surfulater www.surfulater.com "Save what you Surf"

Disable Move

nethaji12-Oct-04 7:52

nethaji

12-Oct-04 7:52

Hi,
I Want to disable move menuitem in a window's system menu, please help.

Thanks
Bose

Re: Disable Move

Andrzej Markowski12-Oct-04 19:41

Andrzej Markowski

12-Oct-04 19:41

Congratulations!!! Good question. I wasted two hours of my life today doing this s..t for you.
Below is a solution of the problem:

BOOL CYourDlg::PreTranslateMessage(MSG* pMsg) 
{
if((pMsg->message==WM_NCLBUTTONDOWN && SendMessage(WM_NCHITTEST,0,pMsg->lParam)==HTSYSMENU) || 
(pMsg->message==WM_NCRBUTTONDOWN && SendMessage(WM_NCHITTEST,0,pMsg->lParam)==HTCAPTION))
{
CMenu* pSysMenu = GetSystemMenu(FALSE);
if (pSysMenu != NULL)
{
if(GetStyle()&WS_THICKFRAME)
pSysMenu->EnableMenuItem(SC_SIZE,MF_BYCOMMAND|MF_ENABLED);
else
pSysMenu->EnableMenuItem(SC_SIZE,MF_BYCOMMAND|MF_GRAYED);
if(GetStyle()&WS_MINIMIZEBOX||GetStyle()&WS_MAXIMIZEBOX)
{
if(GetStyle()&WS_MINIMIZEBOX)
{
if(IsIconic())
{
pSysMenu->EnableMenuItem(SC_MINIMIZE,MF_BYCOMMAND|MF_GRAYED);
pSysMenu->EnableMenuItem(SC_RESTORE,MF_BYCOMMAND|MF_ENABLED);
}
else
{
pSysMenu->EnableMenuItem(SC_MINIMIZE,MF_BYCOMMAND|MF_ENABLED);
pSysMenu->EnableMenuItem(SC_RESTORE,MF_BYCOMMAND|MF_GRAYED);
}
}
else
pSysMenu->EnableMenuItem(SC_MINIMIZE,MF_BYCOMMAND|MF_GRAYED);
if(GetStyle()&WS_MAXIMIZEBOX)
{
if(IsZoomed())
{
pSysMenu->EnableMenuItem(SC_MAXIMIZE,MF_BYCOMMAND|MF_GRAYED);
pSysMenu->EnableMenuItem(SC_RESTORE,MF_BYCOMMAND|MF_ENABLED);
}
else
{
pSysMenu->EnableMenuItem(SC_MAXIMIZE,MF_BYCOMMAND|MF_ENABLED);
pSysMenu->EnableMenuItem(SC_RESTORE,MF_BYCOMMAND|MF_GRAYED);
}
}
else
pSysMenu->EnableMenuItem(SC_MAXIMIZE,MF_BYCOMMAND|MF_GRAYED);
}	
<BR>pSysMenu->EnableMenuItem(SC_MOVE,MF_BYCOMMAND|MF_GRAYED); // gray MOVE item
int nRet = pSysMenu->TrackPopupMenu(TPM_LEFTALIGN|TPM_RIGHTBUTTON|TPM_RETURNCMD, LOWORD(pMsg->lParam), HIWORD(pMsg->lParam), this);
PostMessage(WM_SYSCOMMAND,nRet,pMsg->lParam);
return 1;
}
}
return CDialog::PreTranslateMessage(pMsg);
}

Regards,
Andrzej Markowski

My Latest ArticlesCCustomBitmapButton: An owner-draw button and a frame for the caption bar, in one class.
CCustomTabCtrl: A clone of the Excel tab sheet control.

Unicode <-> MBCS

EurekaJim12-Oct-04 7:09

EurekaJim

12-Oct-04 7:09

I have an application that is compiled for Unicode (MSVC 7.0). I need to call functions in a DLL that is MBCS only. I need suggestions on how to convert the function args that are passed between the Unicode and non-unicode layers.

Jim S

Re: Unicode <-> MBCS

jan larsen12-Oct-04 7:19

jan larsen

12-Oct-04 7:19

I have an angry baby sitting on my lap so I'm going to be quick about it:
MultiByteToWideChar
WideCharToMultiByte

look'em up Smile | :)

"After all it's just text at the end of the day. - Colin Davies

"For example, when a VB programmer comes to my house, they may say 'does your pool need cleaning, sir ?' " - Christian Graus

Re: Unicode <-> MBCS

Michael Dunn12-Oct-04 20:32

Michael Dunn

12-Oct-04 20:32

Short answer: Use an ATL conversion macro such as W2A.
Long answer: See my string articles which cover the subject in depth: Part 1[^] | Part 2[^]

--Mike--
Personal stuff:: Ericahist | Homepage
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----
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Re: Unicode <-> MBCS

EurekaJim13-Oct-04 5:11

EurekaJim

13-Oct-04 5:11

I knew about converting strings to/from Unicode and the ATL macros. I didn't know if anything special had to be done to make function calls work correctly between a Unicode and a non-Unicode DLL. I think that the answer is that you only have to worry about keeping the strings straight.

MFC CFile help!

Anonymous12-Oct-04 7:03

Anonymous

12-Oct-04 7:03

I have 5 CString and i want to write it to a txt file on 5 different lines at the end of the file help please.

Re: MFC CFile help!

BlackDice12-Oct-04 7:08

BlackDice

12-Oct-04 7:08

insert "\r\n" between each CString then call CFile::Write()

[insert witty comment here]

bdiamond Sleepy | :zzz:

Re: MFC CFile help!

ANDYFA12-Oct-04 11:48

ANDYFA

12-Oct-04 11:48

that what i did it printed 2 ascii

Window Media Player Control

RockRock12-Oct-04 6:47

RockRock

12-Oct-04 6:47

I want to write an APP for window media player to play a video.
What should i do?

Re: Window Media Player Control

Ryan Binns12-Oct-04 18:30

Ryan Binns

12-Oct-04 18:30

RockRock wrote:
I want to write an APP for window media player to play a video.
What should i do?

Have you actually tried yet? If so, what have you done so far, and what didn't work? You're a lot more likely to get answers if you post a question we could actually answer, such as:

"I'm trying to use Windows Media Player to play a video from inside my application, but calling CoCreateInstance() to create an IWMPCore object always fails. I've got Media Player 9 installed and I'm successfully calling CoInitialize(). What else could cause CoCreateInstance() to fail?"

Notice the difference between that and your question?

If you haven't tried yourself, then I don't think many people would be willing to help.

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: Window Media Player Control

RockRock13-Oct-04 8:47

RockRock

13-Oct-04 8:47

i am sorry.
since i don't know how to get started on it.

Re: Window Media Player Control

Ryan Binns14-Oct-04 1:55

Ryan Binns

14-Oct-04 1:55

Well, you can have a look at the Windows Media Player ActiveX control, or you can use the IWMPCore interface that I mentioned before. I haven't done it myself so I can't really help much more than that.

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

aVisual C++ 6 editor Problem

Leyu12-Oct-04 6:44

Leyu

12-Oct-04 6:44

I was working on something when the computer crushed and msdev.exe closed. After that i opened msdev.exe but there was no menu items, toolbar no nothing but only the editing window displayed i suspected that the toolbar and menu setting file (probably the .ini) file become corrupted.
i have heard some where that when i execute the program from the start->run and run the program by writing "msdev.exe -something" and runningthe program i can fix all this but i searched the windows help and msdn for such things but couldn't find any

i have a friend who has the same problem with microsoft word but he gets around using the keyboard shortcuts.

if you know this by any way pls help me i am stuck and got a work to do.
Confused | :confused:

Re: aVisual C++ 6 editor Problem

Ryan Binns12-Oct-04 18:31

Ryan Binns

12-Oct-04 18:31

Have you rebooted the machine?

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: aVisual C++ 6 editor Problem

Aamir Butt12-Oct-04 19:50

Aamir Butt

12-Oct-04 19:50

Ryan Binns wrote:
Have you rebooted the machine?

Very Nice reply Smile | :)

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Stuck to Programming through an unbreakable bond Frown | :(

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File Streaming

RockRock12-Oct-04 6:43

RockRock

12-Oct-04 6:43

I want to send a partition of video file and some data files(text and images) from one terminal to another terminal. After sending, the video should be playable.
Therefore, I have to write a program that perform streaming.
1.-RTSP / RTP, which is better?
2.-Shall i choose to use WMV, ASF or AVI file?
3.-Any other methods are welcome.
Please help me.

Validating control content when loosing focus

JGranborg12-Oct-04 6:30

JGranborg

12-Oct-04 6:30

Actually I have been programming for quit som years, but everytime I have to validate a control when I leave it I do some trial and error exploring.
I like to know if somebody can tell me, whats the right strategi for doing this.
Jørgen Granborg

Jørgen Granbborg

Re: Validating control content when loosing focus

David Crow12-Oct-04 6:33

David Crow

12-Oct-04 6:33

How about the WM_KILLFOCUS message?

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

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