C / C++ / MFC

Re: Get Background color of an active wondow in MFC program

20-Feb-07 8:02

Anil K P wrote:
I need to get the background color of an active window. While trying, I get it as RGB(205,205,205) which is White

How are you doing this?

"Do you know what it's like to fall in the mud and get kicked... in the head... with an iron boot?
Of course you don't, no one does. It never happens. It's a dumb question... skip it."

toxcct20-Feb-07 8:47

toxcct

20-Feb-07 8:47

Anil K P wrote:
RGB(205,205,205) which is White

wrong, white is RGB(255, 255, 255)

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Migration VC++

world.wild.web20-Feb-07 7:41

world.wild.web

20-Feb-07 7:41

Found after searching a lot.

http://blogs.msdn.com/adam_nathan/archive/2005/07/15/439342.aspx[^]

Hope it help someone.

Mark Salsbery20-Feb-07 8:08

20-Feb-07 8:08

Bookmarked/Favorited. Thanks!

Mark

"Do you know what it's like to fall in the mud and get kicked... in the head... with an iron boot?
Of course you don't, no one does. It never happens. It's a dumb question... skip it."

Hamid_RT20-Feb-07 18:30

Hamid_RT

20-Feb-07 18:30

Very good;)

WhiteSky

Anilkumar K V20-Feb-07 23:44

Anilkumar K V

20-Feb-07 23:44

I was too searching for the same Smile | :)

Thanks

Detecting Unicode Fonts using Win32 API

world.wild.web21-Feb-07 3:07

world.wild.web

21-Feb-07 3:07

I was searching for days on Upgrading Issues . Until I found this site for upgradation of VC++.

The credit goes to Adam Nathan.
Links
http://msdn2.microsoft.com/en-us/library/8h8eh904(vs.80).aspx[^]

Dave_Roach20-Feb-07 6:41

Dave_Roach

20-Feb-07 6:41

I am wondering if anyone knows a reliable way using GDI to detect whether an HFONT has unicode support?

Confused | :confused:

Re: Detecting Unicode Fonts using Win32 API

Mark Salsbery20-Feb-07 7:32

Re: Detecting Unicode Fonts using Win32 API

20-Feb-07 7:32

Does the GetFontUnicodeRanges() API help to determine Unicode support for a font?

// yes, sample code is MFC, but the relevant APIs should be obvious
 
CClientDC dc(this);
 
CFont font;
VERIFY(font.CreatePointFont(120, _T("Arial Unicode MS"), &dc));
 
CFont* def_font = dc.SelectObject(&font);
 
DWORD dwGlyphSetSize = ::GetFontUnicodeRanges(dc, 0);
GLYPHSET *pGlyphSet = (GLYPHSET *)new BYTE[dwGlyphSetSize];
::GetFontUnicodeRanges(dc, pGlyphSet);
//** examine Unicode character ranges here
delete[] (BYTE *)pGlyphSet;
 
dc.SelectObject(def_font);

"Do you know what it's like to fall in the mud and get kicked... in the head... with an iron boot?
Of course you don't, no one does. It never happens. It's a dumb question... skip it."

Dave_Roach20-Feb-07 8:29

Dave_Roach

20-Feb-07 8:29

Thanks Mark

I looked into that API call, however the other stipulation that I forgot to mention D'Oh! | :doh:

is that it has to work with windows 98. Unfortunatly that call only works for 2000 and up.

If there is any other way that you know of?

Thanks again Mark

Dave

Re: Detecting Unicode Fonts using Win32 API

Mark Salsbery20-Feb-07 8:45

Returning LRESULT in DefWindowProc()

20-Feb-07 8:45

Hmmm, maybe this KB article will help: Unicode support in Windows 95 and Windows 98[^]

Mark

"Do you know what it's like to fall in the mud and get kicked... in the head... with an iron boot?
Of course you don't, no one does. It never happens. It's a dumb question... skip it."

VFaul20-Feb-07 6:29

VFaul

20-Feb-07 6:29

I have a DefWindowProc() function to catch unhandled messages. This function returns an LRESULT. I have a switch statement and in some cases I call CWnd::DefWindowProc(). So I simply return the result of the call to CWnd::DefWindowProc(). In other cases, I handle the message.

What should the value of LRESULT be when I handle the message?

Re: Returning LRESULT in DefWindowProc()

PJ Arends20-Feb-07 6:33

PJ Arends

20-Feb-07 6:33

Depends on the message. The documentation will tell you if the message needs a certain return value. If it does not then simply return zero.

You may be right
I may be crazy
-- Billy Joel --

Within you lies the power for good, use it!!!

Re: Returning LRESULT in DefWindowProc()

David Crow20-Feb-07 7:50

David Crow

20-Feb-07 7:50

Per MSDN:

The return value is the result of the message processing and depends on the message sent.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Save File Dialog With Uneditable Directory

aei_totten20-Feb-07 5:42

aei_totten

20-Feb-07 5:42

Is there a way to make the Save File Dialog have an uneditable directory path or do I have to create a dialog from scratch to do this?

Re: Save File Dialog With Uneditable Directory

Newbie0020-Feb-07 6:04

Newbie00

20-Feb-07 6:04

What does the word "Uneditable" mean?

Re: Save File Dialog With Uneditable Directory

aei_totten20-Feb-07 6:08

aei_totten

20-Feb-07 6:08

So that they can not change the directory that they are in

Re: Save File Dialog With Uneditable Directory

PJ Arends20-Feb-07 6:39

PJ Arends

20-Feb-07 6:39

Is this[^] what you want?

If not, there articles on how to modify the file dialog found here[^]

You may be right
I may be crazy
-- Billy Joel --

Within you lies the power for good, use it!!!

SetTimer() & TimerProc [modified]

kitty520-Feb-07 5:05

kitty5

20-Feb-07 5:05

Hi,
I've created an MDI application that has a tool bar with buttons which open dialog boxes when clicked.
One Dialog Box class in this application needs a timer.
After reading about CWnd::SetTimer():

UINT_PTR SetTimer(UINT_PTR nIDEvent,UINT uElapse,<br />
TIMERPROC lpTimerFunc);

I've done the following:

<br />
test.h:<br />
class test : public CDialog<br />
{<br />
...<br />
afx_msg void OnStart();<br />
...<br />
};<br />
void CALLBACK EXPORT TimerProc(<br />
HWND hWnd, // handle of CWnd that called SetTimer<br />
UINT nMsg, // WM_TIMER<br />
UINT nIDEvent // timer identification<br />
DWORD dwTime // system time<br />
);<br />
=================================<br />
test.cpp<br />
BEGIN_MESSAGE_MAP(test, CDialog)<br />
     ON_WM_TIMER()<br />
END_MESSAGE_MAP()<br />
<br />
void test::OnStart()<br />
{<br />
   ...<br />
   int timer;<br />
   ...<br />
   timer = SetTimer(1,1000,TimerProc); // 1000 milisecond timer<br />
   int i = 0;<br />
   while(i<999999999)<br />
   {<br />
      i++; //TIMER SHOULD TIMEOUT IN HERE take about 7sec.<br />
   }<br />
   KillTimer(timer);// <-COMES TO THIS POINT<br />
   ...<br />
}<br />
<br />
void CALLBACK TimerProc(<br />
HWND hWnd, // handle of CWnd that called SetTimer<br />
UINT nMsg, // WM_TIMER<br />
UINT nIDEvent // timer identification<br />
DWORD dwTime // system time<br />
)<br />
{<br />
   MessageBeep(0xFFFFFFFF);   // Beep<br />
   MSMPlaybackDlg* pbDlg = NULL;<br />
   pbDlg->OnButtonHddPause();<br />
   KillTimer(hWnd, pbDlg->timer);<br />
}<br />

the problem is that it doesn't call the TimerProc. It's as if it doesn't timeout after 1000miliseconds.

does anyone know what i'm doing wrong? Confused | :confused:

thanks,

Kitty5

22491720-Feb-07 5:25

224917

20-Feb-07 5:25

It looks like your while loop does not give the main window thread any chance to process its message queue. And once the while loop is exit you also kill the timer immediately.

suhredayan

kitty520-Feb-07 5:35

kitty5

20-Feb-07 5:35

suhredayan® wrote:
It looks like your while loop does not give the main window thread any chance to process its message queue.

Actually the code is and I also tried the following:

<br />
int timer;<br />
int i;<br />
MSG msg;<br />
HWND hwndTimer = (HWND)this;<br />
while(something)<br />
{<br />
   timer = SetTimer(1,1000,TimerProc);<br />
   i = 0;<br />
   while(i<999999999)<br />
   {<br />
      GetMessage(&msg, NULL, 0, 0);<br />
      if(msg.message == WM_TIMER)<br />
          msg.hwnd = hwndTimer; // <-It does come here so the timer does  <br />
                                   get to 1000<br />
      TranslateMessage(&msg);<br />
      DispatchMessage(&msg);<br />
      i++;<br />
   }<br />
   KillTimer(timer); <br />
}<br />

but it still doesn't execute the TimerProc()

Kitty5

22491720-Feb-07 6:07

224917

20-Feb-07 6:07

kitty5 wrote:
msg.hwnd = hwndTimer;

Why do you need above line ? The WM_TIMER message should have a NULL hWnd for DispatchMessage to invoke the callback.

suhredayan