C / C++ / MFC

Re: How could I run one of my class member Functions in a new thread:

8-Apr-10 3:28

Message Removed

m_code8-Apr-10 3:44

m_code

8-Apr-10 3:44

sorry But i don't understand your point of view and why should i do this?

Re: How could I run one of my class member Functions in a new thread:

KarstenK8-Apr-10 3:41

Re: How could I run one of my class member Functions in a new thread:

8-Apr-10 3:41

make the HWND to the start parameter of the Threadfunc and construct in the func the new object. Sleepy | :zzz:

Press F1 for help or google it.
Greetings from Germany

m_code8-Apr-10 3:50

m_code

8-Apr-10 3:50

That made the same problem either, nothing is drawn in the HWND while the dawing methods executed one after another

Re: How could I run one of my class member Functions in a new thread:

KarstenK8-Apr-10 4:09

CreateBitmapIndirect() doesnt create bitmap

8-Apr-10 4:09

can you show me some code?

Press F1 for help or google it.
Greetings from Germany

globus0008-Apr-10 2:08

globus000

8-Apr-10 2:08

Hello
I've got the following problem with CreateBitmapIndirect(). I've got bitmap data - width, height, bits-per-pixel and array of bits. I'm trying to create HBITMAP by calling CreateBitmapIndirect, but when it's created the biBits of the BITMAP object is NULL. Here is the cpde"

int size = 0, width = 0, height = 0, planes = 0, bpp = 0, r = 0, g = 0, b = 0;
unsigned char* pBits = NULL;
CComVariant data;
hr = pIShellBmp->GetData( &width, &height, &planes, &bpp, &data ); //my interface which returns serialized bitmap
hr = pIShellBmp->GetColors( &r, &g, &b );
            if( SUCCEEDED(hr) )
            {

                CComSafeArray<BYTE> bits( data.parray );
                pBits = new unsigned char[ bits.GetCount() ]; // this is array of bits in bitmap - it's content of other BITMAP::biBits which I store in IShellBmp interface in COM server (local service)
                for( int i = 0; i < bits.GetCount(); ++i )
                {
                    pBits[i] = bits.GetAt( i );
                }

                BITMAP bmp;

                bmp.bmType = 0;
                bmp.bmBitsPixel = bpp;
                bmp.bmHeight = height;
                bmp.bmPlanes = planes;
                bmp.bmWidth = width;
                bmp.bmWidthBytes = width * bpp / 8 + (width * bpp / 8)%2;
                bmp.bmBits = pBits;


                HBITMAP hBitmap = CreateBitmapIndirect( &bmp ); // THIS IS OK - bitmap created


                BITMAPINFO bmi;
                bmi.bmiHeader.biSize = sizeof(BITMAPINFO);
                bmi.bmiHeader.biBitCount = bpp;
                bmi.bmiHeader.biClrImportant = 0;
                bmi.bmiHeader.biClrUsed = 0;
                bmi.bmiHeader.biCompression = BI_RGB;
                bmi.bmiHeader.biHeight = height;
                bmi.bmiHeader.biPlanes = planes;
                bmi.bmiHeader.biSizeImage = 0;
                bmi.bmiHeader.biWidth = width;


                if( hBitmap == NULL )
                {
                    DWORD err = GetLastError();
                    hr = E_FAIL;
                }//if
                else
                {
                    DWORD err = SetDIBits( CreateCompatibleDC(NULL), hBitmap, 0, bmp.bmHeight, pBits, &bmi, DIB_RGB_COLORS );  // This line returns 0 - ???
                    err = GetLastError(); // error code is 0
                    GetObject( hBitmap, sizeof(BITMAP), &bmp ); // bmp.bibits contains NULL - why??
                    WriteBMPFile( hBitmap, _T("c:\\received.bmp"), CreateCompatibleDC( NULL ) );
                }//else
            }//if

For some reasons the lines in bold fail and there is no error code. Can you please help me - where I'm wrong?

Re: CreateBitmapIndirect() doesnt create bitmap

KarstenK8-Apr-10 3:23

Re: CreateBitmapIndirect() doesnt create bitmap

8-Apr-10 3:23

HBITMAP hBitmap = CreateBitmapIndirect( &bmp );
//check out
GetObject( hBitmap, sizeof(BITMAP), &bmp );
//or draw the bitmap for visual check

//isnt SetDIBits() double done
read: http://msdn.microsoft.com/en-us/library/dd144904%28VS.85%29.aspx[^]

Press F1 for help or google it.
Greetings from Germany

Jonathan Davies8-Apr-10 5:23

Jonathan Davies

8-Apr-10 5:23

Should you be setting bmi.bmiHeader.biSizeImage before calling SetDIBits? I only say this because I found the following I'd used which uses GetDIBits to calculate it's value:

...

// Calculate the biSizeImage parameter using GetDIBits or manually if this fails
int ScanLines = GetDIBits(hMemDC,hBmp,0,B1Win.ylen,NULL,lpbmInfo,DIB_RGB_COLORS);
if(lpbmInfo->bmiHeader.biSizeImage == 0)
    lpbmInfo->bmiHeader.biSizeImage = ((((lpbmInfo->bmiHeader.biWidth * lpbmInfo->bmiHeader.biBitCount) + 31) & ~31) >> 3) * lpbmInfo->bmiHeader.biHeight;



// Copy bits from RGB888 to 24 bit DIB and inverting bitmap 
ScanLines = (int)(InControl.VideoRoi.ylen);	// SetDIBits inverts if height is -ve

// biHeight originally set -ve here
ScanLines = SetDIBits(hMemDC,hBmp,0,ScanLines,BDBoard.pcnvBuffer,lpbmInfo,DIB_RGB_COLORS);

...

Widest Character and Height of the character

shiv@nand8-Apr-10 1:13

8-Apr-10 1:13

I want to know the widest character and height of "MS Sans Sarif" Font Type. The Characters = {abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ},font size may be in between 8 to 50.

Eugen Podsypalnikov8-Apr-10 1:37

8-Apr-10 1:37

Try it

CSize GetMaxCharSize(CDC* pcDC, CFont* pcFont)
{
  CSize csizeResult(0, 0);
  if (pcDC && pcFont) {
    CGdiObject* pcOldFont = pcDC->SelectObject(pcFont);
    TEXTMETRIC tm = {0};
    pDC->GetTextMetrics(&tm);
    csizeResult.cx = tm.tmMaxCharWidth;
    csizeResult.cy = tm.tmHeight;
    pcDC->SelectObject(pcOldFont);
  }
  return csizeResult;
}

virtual void BeHappy() = 0;

Adam Roderick J8-Apr-10 1:41

Adam Roderick J

8-Apr-10 1:41

I support the above. Smile | :)

Величие не Бога может быть недооценена.

shiv@nand8-Apr-10 1:49

8-Apr-10 1:49

please give me an example ?

Eugen Podsypalnikov8-Apr-10 2:01

8-Apr-10 2:01

It could be something like this Smile | :)

/*virtual*/ void CYourView::OnInitialUpdate()
{
  CBaseOfYourView::OnInitialUpdate();

  /*CFont*/ m_cFont.CreatePointFont(120, _T("Arial")); // 12pts * 10
...
}

/*virtual*/ void CYourView::OnDraw(CDC* pDC)
{
  CSize cMaxCharSize(GetMaxCharSize(pDC, &m_cFont));
  CRect cMaxCharRect(CPoint(100, 100), cMaxCharSize);
  pDC->FillSolidRect(cMaxCharRect, RGB(0, 128, 200));
...
}

virtual void BeHappy() = 0;

shiv@nand8-Apr-10 2:17

8-Apr-10 2:17

thank you

Michel Godfroid8-Apr-10 6:47

Michel Godfroid

8-Apr-10 6:47

http://msdn.microsoft.com/en-us/library/xwf9s90b(VS.71).aspx[^]
In Western European fonts, the widest character is usually capital letter M (that's why typesetters refer to em-height and em-width). Most fonts will contain a character call em_space, which is a space that is exactly as wide as the widest character in the font.

Eugen Podsypalnikov8-Apr-10 9:07

8-Apr-10 9:07

Please compare them Smile | :)

:
- W
- M

virtual void BeHappy() = 0;

Michel Godfroid8-Apr-10 9:21

Michel Godfroid

8-Apr-10 9:21

That's why I said 'usually' Wink | ;-)

em-space (or em_dash) should still be valid, though...

http://en.wikipedia.org/wiki/Em_(typography)[^]

shiv@nand8-Apr-10 17:46

8-Apr-10 17:46

how to compare W and M

Encrypt

MsmVc8-Apr-10 0:41

MsmVc

8-Apr-10 0:41

Hi All

How can i encrypt CString values?

Re: Encrypt

_AnsHUMAN_ 8-Apr-10 0:44

_AnsHUMAN_

8-Apr-10 0:44

Here you go[^]
There are algorithms and the encryption levels related to each one that you might use.

You need to google first, if you have "It's urgent please" mentioned in your question.
Wink | ;-)

_AnShUmAn_

Re: Encrypt

MsmVc8-Apr-10 0:47

MsmVc

8-Apr-10 0:47

Thank for vital and important information...

Message Removed

8-Apr-10 2:02

MsmVc

8-Apr-10 2:02

Message Removed

Re: Encrypt

KarstenK8-Apr-10 3:25

How to change focus from TreeView to ListView using tab in MFC?

8-Apr-10 3:25

dont call that encrypted Laugh | :laugh:

Press F1 for help or google it.
Greetings from Germany

yvanc7-Apr-10 23:40

yvanc

7-Apr-10 23:40

Hello, I am currently working on an MFC project. The project have a treeview and listview similar to the layout of windows registry editor. I was just wondering if any of you guys know how to change the focus wherein if the user click one item in the treeview and then presses the tab key the focus would be changed to the corresponding item in the listview? Please help.

Re: How to change focus from TreeView to ListView using tab in MFC?

Eugen Podsypalnikov8-Apr-10 0:57