Ribbon problem

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   We are having a problem with the following code as we want to generate gallery control items on the fly, however once we add the CreateCompatibleDC( NULL ) section it only shows a black square for each gallery control item

Any help would be much appreciated as this code works fine in OnPaint handlers etc.

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m_ImageList.Create( m_nWidth, m_nHeight, ILC_COLOR32 | ILC_MASK, 0, 1 );

HBITMAP hBitmap = (HBITMAP)::LoadImage( NULL, "c:\\1.bmp", IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION | LR_LOADFROMFILE );

if ( hBitmap == NULL ) return;

CBitmap *pBitmap = new CBitmap;

pBitmap->Attach( hBitmap );

CDC *pDC = new CDC;

pDC->CreateCompatibleDC( NULL ); // this line seems to make it fail

pDC->SelectObject( pBitmap );

m_ImageList.Add( pBitmap, m_crMaskColour );

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Thanks for any help, much appreciated.
Terry

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terrym Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 13 April 2007 Status: Offline Points: 836	Post Options Post Reply Quote terrym Report Post Thanks(0) Quote Reply Topic: Ribbon problem Posted: 25 April 2007 at 7:57am
	We are having a problem with the following code as we want to generate gallery control items on the fly, however once we add the CreateCompatibleDC( NULL ) section it only shows a black square for each gallery control item Any help would be much appreciated as this code works fine in OnPaint handlers etc. -------- m_ImageList.Create( m_nWidth, m_nHeight, ILC_COLOR32 \| ILC_MASK, 0, 1 ); HBITMAP hBitmap = (HBITMAP)::LoadImage( NULL, "c:\\1.bmp", IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION \| LR_LOADFROMFILE ); if ( hBitmap == NULL ) return; CBitmap pBitmap = new CBitmap; pBitmap->Attach( hBitmap ); CDC pDC = new CDC; pDC->CreateCompatibleDC( NULL ); // this line seems to make it fail pDC->SelectObject( pBitmap ); m_ImageList.Add( pBitmap, m_crMaskColour ); -------- Thanks for any help, much appreciated. Terry
	Thank you, Terry Mancey email terry@tmancey.ltd.uk \| linkedin www.tmancey.ltd.uk \| twitter @tmancey

Oleg Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 21 May 2003 Location: United States Status: Offline Points: 11234	Post Options Post Reply Quote Oleg Report Post Thanks(0) Quote Reply Posted: 25 April 2007 at 8:02am
	Hello, Instead of converting bitmap to imagelist, you can set bitmap directly - BOOL SetIcons(CBitmap& bmpIcons, UINT* pCommands, int nCount, CSize szIcon, XTPImageState imageState = xtpImageNormal, BOOL bAlpha = FALSE)
	Oleg, Support Team CODEJOCK SOFTWARE SOLUTIONS

Oleg Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 21 May 2003 Location: United States Status: Offline Points: 11234	Post Options Post Reply Quote Oleg Report Post Thanks(0) Quote Reply Posted: 25 April 2007 at 8:04am
	ps: You don't need these lines to convert hbitmap to CBitmap: CBitmap pBitmap = new CBitmap; pBitmap->Attach( hBitmap* ); CDC pDC = new CDC; pDC->CreateCompatibleDC( NULL* ); // this line seems to make it fail pDC->SelectObject( pBitmap ); just need these: HBITMAP hBitmap = (HBITMAP)::LoadImage( NULL, "c:\\1.bmp", IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION \| LR_LOADFROMFILE ); CBitmap bmp; bmp.Attach(hBitmap);
	Oleg, Support Team CODEJOCK SOFTWARE SOLUTIONS

terrym Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 13 April 2007 Status: Offline Points: 836	Post Options Post Reply Quote terrym Report Post Thanks(0) Quote Reply Posted: 25 April 2007 at 8:06am
	Hi The problem is we need to use the DC because we want to edit the bitmap, eg. Resize or add text before it is added to gallery control Thanks Terry
	Thank you, Terry Mancey email terry@tmancey.ltd.uk \| linkedin www.tmancey.ltd.uk \| twitter @tmancey

terrym Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 13 April 2007 Status: Offline Points: 836	Post Options Post Reply Quote terrym Report Post Thanks(0) Quote Reply Posted: 25 April 2007 at 8:08am
	Hi We load our images from disk then we resize them or add text etc. to each one, so we may need more images, but first we have to create a compatible DC so we can edit the images or add text. This is the problem :( Thanks Terry
	Thank you, Terry Mancey email terry@tmancey.ltd.uk \| linkedin www.tmancey.ltd.uk \| twitter @tmancey

terrym Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 13 April 2007 Status: Offline Points: 836	Post Options Post Reply Quote terrym Report Post Thanks(0) Quote Reply Posted: 25 April 2007 at 8:22am
	The problem seems to be that we are passing NULL when we create compatible DC, and even thou we are attaching the bitmap it is not setting up this DC correctly. Any ideas on what else we can pass ? Any help appreciated, even willing to pay somebody to help us fix this as urgent for a projecct.
	Thank you, Terry Mancey email terry@tmancey.ltd.uk \| linkedin www.tmancey.ltd.uk \| twitter @tmancey

Oleg Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 21 May 2003 Location: United States Status: Offline Points: 11234	Post Options Post Reply Quote Oleg Report Post Thanks(0) Quote Reply Posted: 25 April 2007 at 8:30am
	Hi, Don't think problem in CreatecompatibleDC line - think ptoblem that you call SelectObject and didn't restore context back. try CBitmap* pOldBitmap = pDC->SelectObject( pBitmap ); // Make some work pDC->SelectObject( pOldBitmap); delete pDC; m_ImageList.Add( pBitmap, m_crMaskColour ); delete pBitmap;
	Oleg, Support Team CODEJOCK SOFTWARE SOLUTIONS

terrym Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 13 April 2007 Status: Offline Points: 836	Post Options Post Reply Quote terrym Report Post Thanks(0) Quote Reply Posted: 25 April 2007 at 8:52am
	Hi Ok that works fine until we then create a 2nd DC with a compatible bitmap so we can then stretchblt to other DC to create our item (thumbnail), the code is as follows: HBITMAP hBitmap = (HBITMAP)::LoadImage( NULL, "c:\\1.bmp", IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION \| LR_LOADFROMFILE ); if ( hBitmap == NULL ) return; CDC pSourceDC = new CDC; CDC pDestinationDC = new CDC; CBitmap pSourceBitmap = new CBitmap; pSourceBitmap->Attach( hBitmap ); pSourceDC->CreateCompatibleDC( NULL ); CBitmap pOldSourceBitmap = pSourceDC->SelectObject( pSourceBitmap ); pDestinationDC->CreateCompatibleDC( NULL ); CBitmap *pDestinationBitmap = new CBitmap; pDestinationBitmap->CreateCompatibleBitmap( pSourceDC, 48, 48 ); pDestinationDC->StretchBlt( 0, 0, 48, 48, pSourceDC, 0, 0, 300, 300, SRCCOPY ); pSourceDC->SelectObject( pOldSourceBitmap); delete pSourceDC; m_ImageList.Add( pDestinationBitmap, m_crMaskColour ); delete pDestinationDC; delete pDestinationBitmap; delete pSourceBitmap; Thanks for help, it is much appreciated.
	Thank you, Terry Mancey email terry@tmancey.ltd.uk \| linkedin www.tmancey.ltd.uk \| twitter @tmancey

Oleg Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 21 May 2003 Location: United States Status: Offline Points: 11234	Post Options Post Reply Quote Oleg Report Post Thanks(0) Quote Reply Posted: 25 April 2007 at 1:19pm
	Hi, You didn't select pDestinationBitmap to pDestinationDC... You don't need to much new/delete create them in heap: CDC dcSrc; dcSrc.CreateCompatibleDC(NULL) etc
	Oleg, Support Team CODEJOCK SOFTWARE SOLUTIONS

terrym Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 13 April 2007 Status: Offline Points: 836	Post Options Post Reply Quote terrym Report Post Thanks(0) Quote Reply Posted: 25 April 2007 at 4:04pm
	Hi The new version is below same applies, we are creating the object using CreateCompatibleBitmap which according to microsoft doesn't need to have it's object selected, however I did try this and still same black square, I have sent the project to you via priority support to show you the problem. Thanks for the help Terry HBITMAP hBitmap = (HBITMAP)::LoadImage( NULL, "c:\\1.bmp", IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION \| LR_LOADFROMFILE ); if ( hBitmap == NULL ) return; CDC pSourceDC = new CDC; CDC pDestinationDC = new CDC; CBitmap pSourceBitmap = new CBitmap; pSourceBitmap->Attach( hBitmap ); pSourceDC->CreateCompatibleDC( NULL ); CBitmap pOldSourceBitmap = pSourceDC->SelectObject( pSourceBitmap ); pDestinationDC->CreateCompatibleDC( NULL ); CBitmap pDestinationBitmap = new CBitmap; pDestinationBitmap->CreateCompatibleBitmap( pSourceDC, 48, 48 ); CBitmap pOldDestinationBitmap = pSourceDC->SelectObject( pDestinationBitmap ); pDestinationDC->StretchBlt( 0, 0, 48, 48, pSourceDC, 0, 0, 300, 300, SRCCOPY ); pSourceDC->SelectObject( pOldSourceBitmap); delete pSourceDC; m_ImageList.Add( pDestinationBitmap, m_crMaskColour ); pDestinationDC->SelectObject( pOldDestinationBitmap ); delete pDestinationDC; delete pDestinationBitmap; delete pSourceBitmap;
	Thank you, Terry Mancey email terry@tmancey.ltd.uk \| linkedin www.tmancey.ltd.uk \| twitter @tmancey