Re: Skins on Dialog - C / C++ / MFC Discussion Boards

Hi,

While skinning a dialog, i could not able to display 24-bit color bitmaps. Any suggestions please..

With Regards,
Sangeetha.

Sangeetha_J wrote:
i could not able to display 24-bit color bitmaps

Why not? Errors? Exceptions? How are you rendering the bitmaps?

Mark

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

Hi,

I designed the image in photoshop and saved it as a .bmp image.. How use it as a skin to a dialog.

With Regards,
Sangeetha.

An easy way is to draw the bitmap to the dialog in response to the WM_ERASEBKGND message.

Mark

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

More explain will be helpful to get answer.

WhiteSky

Hi Whitesky,

I want to use skin on a dialog.. For that i designed the image using photoshop and saved it as a .bmp image. But how to use it as a skin is my problem. Its not at all getting displayed.. But if i try with 16-bit color bitmap it is getting displayed.. do i have to use some other methods to display it?

With Regards,
Sangeetha.

Can you show your code,please?(not full code)

WhiteSky

Hi, Following is my code..

<br />
HBITMAP m_hBmp;<br />
HRGN m_hClientRgn;<br />
HRGN m_hWndRgn;<br />
HICON m_hIcon;<br />
COLORREF m_colorBk;<br />
<br />
HRGN DIBToRgn(HBITMAP hBmp,COLORREF BkColor,BOOL Direct); // Handle the Skin<br />
<br />
char drive1[_MAX_DIR];<br />
<br />
BEGIN_MESSAGE_MAP(CFormDlg, CDialog)<br />
	//{{AFX_MSG_MAP(CFormDlg)		<br />
		ON_WM_ERASEBKGND()<br />
		ON_WM_PAINT()<br />
		ON_WM_QUERYDRAGICON()<br />
	//}}AFX_MSG_MAP<br />
END_MESSAGE_MAP()<br />
<br />
/////////////////////////////////////////////////////////////////////////////<br />
<br />
BOOL CFormDlg::OnInitDialog() <br />
{<br />
<br />
	CDialog::OnInitDialog();<br />
	<br />
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);<br />
	m_hBmp=(HBITMAP)LoadImage(AfxGetApp()->m_hInstance,MAKEINTRESOURCE(IDB_BITMAP2),IMAGE_BITMAP,0,0,LR_CREATEDIBSECTION);<br />
	m_hClientRgn=CreateEllipticRgn(933,934,934,935);<br />
	m_hWndRgn=DIBToRgn(m_hBmp,0x00ff00,FALSE);<br />
	m_colorBk = 0x00000000;<br />
	<br />
	return TRUE;  // return TRUE unless you set the focus to a control<br />
	              // EXCEPTION: OCX Property Pages should return FALSE<br />
}<br />
<br />
HRGN CFormDlg ::DIBToRgn(HBITMAP hBmp, COLORREF BkColor, BOOL Direct)<br />
{<br />
	// use to return the handle of the HGRN<br />
  	HRGN hRgn = NULL;					<br />
	#define MAX_ALLOC_RECTS  100<br />
	//the difference of the color<br />
	COLORREF  Tolerance=0x00101010;<br />
	if (hBmp)<br />
	{<br />
		//creat the dib to save the dc<br />
		HDC hMemDC = CreateCompatibleDC(NULL);		<br />
		if (hMemDC)<br />
		{<br />
			BITMAP bm;<br />
			//get the info of the bitmap<br />
			GetObject(hBmp, sizeof(bm), &bm);	<br />
<br />
			BITMAPINFOHEADER BmpInfoh = {					//the struct of the bitmap<br />
					sizeof(BITMAPINFOHEADER),			// biSize<br />
					bm.bmWidth,					// biWidth;<br />
					bm.bmHeight,					// biHeight;<br />
					1,						// biPlanes;<br />
					32,						// biBitCount<br />
					BI_RGB,						// biCompression;<br />
					0,						// biSizeImage;<br />
					0,						// biXPelsPerMeter;<br />
					0,						// biYPelsPerMeter;<br />
					0,						// biClrUsed;<br />
					0						// biClrImportant;<br />
			};<br />
			//design a void point to point to the bitmap<br />
			LPVOID pBit32; <br />
			//creat a DIB<br />
			HBITMAP hDib32 = CreateDIBSection(hMemDC, <br />
					(BITMAPINFO *)&BmpInfoh, <br />
					DIB_RGB_COLORS, &pBit32, NULL, 0);<br />
			if (hDib32)<br />
			{<br />
				//copy dib to DC<br />
				HBITMAP hOldib32 = (HBITMAP)SelectObject(hMemDC, hDib32);<br />
				// create a DC to save orgin bitmap<br />
				HDC hDC = CreateCompatibleDC(hMemDC);<br />
				if (hDC)<br />
				{<br />
					BITMAP bm32;<br />
					// get the new 34 bit Dib size<br />
					GetObject(hDib32, sizeof(bm32), &bm32);<br />
					//make sure the 32Dib's every line pilex's is 4 's times<br />
					while (bm32.bmWidthBytes % 4)<br />
						bm32.bmWidthBytes++;<br />
					//copy the orginal dib to DC<br />
					HBITMAP holdBmp = (HBITMAP)SelectObject(hDC, hBmp);<br />
					//copy dib to memory DC<br />
					BitBlt(hMemDC, 0, 0, bm.bmWidth, bm.bmHeight, hDC, 0, 0, SRCCOPY);<br />
					DWORD MaxRects = MAX_ALLOC_RECTS;<br />
					SYSTEM_INFO  Sysinfo;<br />
					//get memory size<br />
					GetSystemInfo(&Sysinfo);<br />
					//make a stack which can chang big<br />
					//alloct memory<br />
					HANDLE hRcData=HeapCreate(HEAP_GENERATE_EXCEPTIONS,Sysinfo.dwPageSize, 0);<br />
					RGNDATA * pRcData=(RGNDATA*)HeapAlloc(hRcData,HEAP_ZERO_MEMORY,<br />
						sizeof(RGNDATAHEADER)+sizeof(RECT)*MaxRects);<br />
					 //fill the the RGNDATA struck<br />
					pRcData->rdh.dwSize = sizeof(RGNDATAHEADER);<br />
					pRcData->rdh.iType = RDH_RECTANGLES;<br />
					pRcData->rdh.nCount = pRcData->rdh.nRgnSize = 0;<br />
					SetRect(&pRcData->rdh.rcBound, MAXLONG, MAXLONG, 0, 0);<br />
		             		BYTE hr,hg,hb,lr,lg,lb;<br />
					switch(BkColor)<br />
					{<br />
					case RGB(255,255,255):	//if the bkcolor is white<br />
						hr = GetRValue(BkColor);<br />
						hg = GetGValue(BkColor);<br />
						hb = GetBValue(BkColor);<br />
						lr = min(0xff, hr - GetRValue(Tolerance));<br />
						lg = min(0xff, hg - GetGValue(Tolerance));<br />
						lb = min(0xff, hb - GetBValue(Tolerance));<br />
						break;<br />
					case RGB(0,0,0):	//if the bkcolor is black<br />
						lr = GetRValue(BkColor);<br />
						lg = GetGValue(BkColor);<br />
						lb = GetBValue(BkColor);<br />
						hr = min(0xff, lr + GetRValue(Tolerance));<br />
						hg = min(0xff, lg + GetGValue(Tolerance));<br />
						hb = min(0xff, lb + GetBValue(Tolerance));<br />
						break;<br />
					default:		//if the bkcolor is other color<br />
						Tolerance=0x111111;<br />
						lr =max(0, GetRValue(BkColor)-GetRValue(Tolerance));<br />
						lg = max(0,GetGValue(BkColor)-GetGValue(Tolerance));<br />
						lb = max(0,GetBValue(BkColor)-GetBValue(Tolerance));<br />
						hr=min(0xff,GetRValue(BkColor)+GetRValue(Tolerance));<br />
						hg=min(0xff,GetGValue(BkColor)+GetGValue(Tolerance));<br />
						hb=min(0xff,GetBValue(BkColor)+GetBValue(Tolerance));<br />
						break;<br />
					}<br />
					// Get the bit point and do the search<br />
					BYTE *pBits = (BYTE *)bm32.bmBits + (bm32.bmHeight - 1) * bm32.bmWidthBytes;<br />
					for (int y = 0; y < bm.bmHeight; y++)<br />
					{<br />
						for (int x = 0; x < bm.bmWidth; x++)<br />
						{<br />
							int x0 = x;<br />
							DWORD *pColor = (DWORD *)pBits + x;<br />
							BYTE dr,dg,db;<br />
							while (x < bm.bmWidth)<br />
							{<br />
								dr=GetRValue(*pColor);<br />
								dg=GetGValue(*pColor);<br />
								db=GetBValue(*pColor);<br />
<br />
								if ((dr>= lr && dr<= hr)&&(dg>=lg&&dg<=hg)&&(db>=lb&&db<=hb))<br />
								{<br />
									if(Direct)<br />
										break;<br />
									else<br />
									{<br />
										pColor++;<br />
										x++;<br />
									}<br />
							  	}<br />
								else if(Direct)<br />
								{<br />
									pColor++;<br />
									x++;<br />
								}<br />
								else<br />
									break;<br />
<br />
							}<br />
							if (x > x0)<br />
							{<br />
								if (pRcData->rdh.nCount >= MaxRects)<br />
								{<br />
									MaxRects += MAX_ALLOC_RECTS;<br />
									//re alloc the stack<br />
									pRcData=(RGNDATA*)HeapReAlloc(<br />
									hRcData,HEAP_ZERO_MEMORY,pRcData, <br />
									sizeof(RGNDATAHEADER)+sizeof(RECT)*MaxRects);<br />
								}<br />
								RECT *pr = (RECT *)&pRcData->Buffer;<br />
								SetRect(&pr[pRcData->rdh.nCount], x0, y, x, y+1);<br />
								pRcData->rdh.rcBound.left = x0;<br />
								pRcData->rdh.rcBound.top = y;<br />
								pRcData->rdh.rcBound.right = x;<br />
								pRcData->rdh.rcBound.bottom = y+1;<br />
								pRcData->rdh.nCount++;<br />
<br />
								if (pRcData->rdh.nCount == 3000)<br />
								{	<br />
									HRGN tmphRgn = ExtCreateRegion(NULL,<br />
									sizeof(RGNDATAHEADER) + (sizeof(RECT) * MaxRects),<br />
									pRcData);<br />
									if (hRgn)<br />
									{<br />
										CombineRgn(hRgn, hRgn, tmphRgn, RGN_OR);<br />
										DeleteObject(tmphRgn);<br />
									}<br />
									else<br />
										hRgn = tmphRgn;<br />
									pRcData->rdh.nCount = 0;<br />
									SetRect(&pRcData->rdh.rcBound, <br />
									MAXLONG, MAXLONG, 0, 0);<br />
								}<br />
							}<br />
						}<br />
<br />
						// search next line<br />
						pBits -= bm32.bmWidthBytes;<br />
					}<br />
					HRGN tmphRgn = ExtCreateRegion(NULL, <br />
							sizeof(RGNDATAHEADER) + (sizeof(RECT) * MaxRects), pRcData);<br />
					if (hRgn)<br />
					{<br />
						CombineRgn(hRgn, hRgn, tmphRgn, RGN_OR);<br />
						DeleteObject(tmphRgn);<br />
					}<br />
					else<br />
						hRgn = tmphRgn;<br />
					// make a rect ,use this rect xor to the  BkColor<br />
					//then we can get the rect we want<br />
					if(!Direct)<br />
					{<br />
						HRGN hRect=CreateRectRgn(0,0,bm.bmWidth,bm.bmHeight);<br />
				                        if(hRect)<br />
						{<br />
							CombineRgn(hRgn,hRgn,hRect,RGN_XOR);<br />
							DeleteObject(hRect);<br />
						}<br />
					    else<br />
							return NULL;<br />
					}<br />
					//release the memory<br />
					HeapFree(hRcData,HEAP_NO_SERIALIZE,pRcData);<br />
					SelectObject(hDC, holdBmp);<br />
					DeleteDC(hDC);<br />
					DeleteObject(holdBmp);<br />
				}<br />
				SelectObject(hMemDC,hOldib32);<br />
				DeleteDC(hMemDC);<br />
				DeleteObject(hOldib32);<br />
				DeleteObject(hDib32);<br />
			}<br />
			else<br />
				DeleteDC(hMemDC);<br />
		}<br />
	}<br />
	return hRgn;<br />
}<br />
<br />
BOOL CFormDlg::OnEraseBkgnd(CDC* pDC) <br />
{<br />
	if(m_hBmp)<br />
	{<br />
		BITMAP bm;<br />
		GetObject(m_hBmp,sizeof(bm),&bm);<br />
		HDC hMemdc=CreateCompatibleDC(pDC->m_hDC); <br />
		if(hMemdc)<br />
		{<br />
		   HBITMAP hOldBmp=(HBITMAP)SelectObject(hMemdc,m_hBmp);<br />
		   if(hOldBmp)<br />
		   {<br />
			   BitBlt(pDC->m_hDC,0,0,bm.bmWidth,bm.bmHeight,hMemdc,0,0,SRCCOPY);<br />
			   SelectObject(hMemdc,hOldBmp);<br />
			   DeleteDC(hMemdc);<br />
			   DeleteObject(hOldBmp);<br />
			   return TRUE;<br />
		   }<br />
		   else<br />
			 DeleteDC(hMemdc);<br />
		}<br />
	}<br />
	return CDialog::OnEraseBkgnd(pDC);<br />
	return FALSE;<br />
}<br />
<br />
void CFormDlg::OnPaint() <br />
{<br />
	if (IsIconic())<br />
	{<br />
		CPaintDC dc(this); // Gerätekontext für Zeichnen<br />
<br />
		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);<br />
<br />
		// Symbol in Client-Rechteck zentrieren<br />
		int cxIcon = GetSystemMetrics(SM_CXICON);<br />
		int cyIcon = GetSystemMetrics(SM_CYICON);<br />
		CRect rect;<br />
		GetClientRect(&rect);<br />
		int x = (rect.Width() - cxIcon + 1) / 2;<br />
		int y = (rect.Height() - cyIcon + 1) / 2;<br />
<br />
		// Symbol zeichnen<br />
		dc.DrawIcon(x, y, m_hIcon);<br />
	}<br />
	else<br />
	{<br />
		CDialog::OnPaint();<br />
	}<br />
}<br />
<br />
<br />
HCURSOR CFormDlg::OnQueryDragIcon()<br />
{<br />
	return (HCURSOR) m_hIcon;<br />
}<br />

With Regards,
Sangeetha.

I said you dont want to show a simple bitmap on the dialog I think these articles are helpful for you.;)
Skins in a Dialog Based Application[^]
Using Skins Without MFC[^]
CDialogSK - A Skinnable Dialog Class[^]

WhiteSky

Hi Whitesky,

Thank u very much.. it works.. the wrong thing i was doing is i didnt use the import option while creating a new bitmap resource in the resource editor.

Thank you,

With Regards,
Sangeetha.

You're welcome.

WhiteSky

Hi Experts,

please can have someone a look at my question here:

http://forum.sysinternals.com/forum_posts.asp?TID=11703[^]

I know its not a programming related question and is a little OT
but maybe someone will have a idea for this issue,...

Thanks in advance,...

K.

Uhh... this question really isn't appropriate for this forum... oh, and you've cross posted this on other boards?

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
<A HREF="http://www.soonr.com">SoonR Inc -- PC Power delivered to your phone</A>

Hi Peter,

i dont like cross-posting nor do i like to
ask questions especially on wrong boards, but
as a developer i know that most of use have
a huge knowledge on this area. This is a very
strange and big problem for me, since i didnt
find the problem by my own and it really is hard
to find. I am a experienced developer and
administrator, but this is a very hard thing!

Anyway, thanks,....

Best regards

K.

True -- there's people here who know a lot.

But cross-posting a link to another site.....?

Why not post the question directly here? Short and direct. I have to say, I started reading the other post, got half way, and stopped.

Edit your question, make it appropriate for this group, and post it directly here.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
<A HREF="http://www.soonr.com">SoonR Inc -- PC Power delivered to your phone</A>

TheNETCoder wrote:
...nor do i like to
ask questions especially on wrong boards, but
as a developer i know that most of use have
a huge knowledge on this area.

So do the right thing, and post the question in the Hardware forum. Those same folks that have "huge knowledge" also frequent the Hardware forum. Wink | ;)

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

i want to notify my application when system gets logoff or login so where will i use WTSRegisterSessionNotification in my Application my Application is a Peopertysheet(Kind)and i want this application run only in admin privilage(means any limited user cant close this window)

Thanks in advance
RYK

When your window is created, you can add it to the WTS session notificatio by passing in the window handle (which you now know), and when it is destroyed, remove it from the session notification list.

Create a message handler for the session notification message. Process the messages of interest to your program from this handler.

mshtmhst.h
mshtml.h
exdisp.h

Does anyone know if these files (above) are installed with C++.net 2003 or C++.net Express 2005?

In VC++ 2003, they are located in the subdirectory...

\Vc7\PlatformSDK\Include

They also came up in my other Platform SDK's when searched for on those directory structures.

Hope that helps.

Thanks, I saw them.

But, I keep on getting this error:

test1 error LNK2019: unresolved external symbol _main referenced in function _mainCRTStartup

Would you know a solution?

Try changing your _main to _tmain

I know Scott Meyers says something about "don't provide default behavior in a virtual method at the base class level".

However, I left my book at work and can't remember "why".

I seem to need default behavior in my base class for a specific virtual function but I'd hate to do it without going over the pro's, cons, tradeoffs, gotha's...

Does anyone remember the reasons why a base class virtual function should not have a default implementation? Or am I remembering what he states incorrectly?

-- modified at 10:46 Thursday 16th August, 2007

UPDATE:
Now that I've had a chance to look at the book, I'm guessing I remembered incorrectly as I can't find anything close to resembling this topic in Meyer's books so forget the question ever existed as my brain is obviously overloaded and functioning improperly.

Virtual functions are for runtime cadidates (late binding or dynamic binding) which are valid via pointer access. To provide the default behavior of the base (as you stated), it would be compile-time binding (static binding), and it gets far away from what virtual was intended for.

Maxwell Chen

I typially provide a reasonable defualt implementation unless it is declared as pure virtual.
My reaspning is I want something known to happen. If it is overridden in a derived class, they must want 'something else' to happen.