CJ Control for displaying .png

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   Hi,

Whats the best control to use for displaying a transparent .png file over top of a background image.

I paint a custom .png file to the background of a dialog inside onpaint and have successfully used the OnCtlColor routine to return the correct brush to make the CJ buttons transparent, but I'd like to know the best control to paint a transparent image.

I've tried using the standard MFC CStatic class, but the transparency isn't working with CStatic::SetBitmap

Thanks,

Jai

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doinIT Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 16 March 2009 Location: Australia Status: Offline Points: 8	Post Options Post Reply Quote doinIT Report Post Thanks(0) Quote Reply Topic: CJ Control for displaying .png Posted: 27 March 2009 at 2:46am
	Hi, Whats the best control to use for displaying a transparent .png file over top of a background image. I paint a custom .png file to the background of a dialog inside onpaint and have successfully used the OnCtlColor routine to return the correct brush to make the CJ buttons transparent, but I'd like to know the best control to paint a transparent image. I've tried using the standard MFC CStatic class, but the transparency isn't working with CStatic::SetBitmap Thanks, Jai

SuperMario Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 14 February 2004 Status: Offline Points: 18057	Post Options Post Reply Quote SuperMario Report Post Thanks(0) Quote Reply Posted: 27 March 2009 at 1:10pm
	Have you tried the button sample?

doinIT Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 16 March 2009 Location: Australia Status: Offline Points: 8	Post Options Post Reply Quote doinIT Report Post Thanks(0) Quote Reply Posted: 29 March 2009 at 8:24pm
	Hi SuperMario, Yeah, I've looked at the button sample and have tried it in my own app. It works ok, but I can still faintly see the outline of the button even though it is being rendered transparently in flat style. It's as if the background of the button isn't getting the right brush offset of the background image. I've posted my OnCtlColor routine if you can see anything that looks off. HBRUSH CHDMSDiag::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) { HBRUSH hbr; if( nCtlColor == CTLCOLOR_STATIC \|\| nCtlColor == CTLCOLOR_BTN \|\| nCtlColor == CTLCOLOR_DLG \|\| nCtlColor == CTLCOLOR_EDIT ) { if(img){ m_brush = CreatePatternBrush(img); // Previously created CImage if (pWnd->m_hWnd != this->m_hWnd) { CXTPWindowRect rcPaint(pWnd); CXTPWindowRect rcBrush(m_hWnd); HDC hDC = pDC->m_hDC; ::SetBrushOrgEx(hDC, rcBrush.left - rcPaint.left, rcBrush.top - rcPaint.top, NULL); ::SetBkMode(hDC, TRANSPARENT); if(nCtlColor == CTLCOLOR_STATIC){ if(pWnd->m_hWnd != this->GetDlgItem(IDC_DRIVE2_ICON)->GetSafeHwnd() && pWnd->m_hWnd != this->GetDlgItem(IDC_DRIVE1_ICON)->GetSafeHwnd() && pWnd->m_hWnd != this->GetDlgItem(IDC_DRIVE_1)->GetSafeHwnd()){ pDC->SetBkMode(TRANSPARENT); ::SetTextColor(hDC, RGB(255, 255, 255)); return (HBRUSH)GetStockObject(NULL_BRUSH); }else int test = 0; } else ::SetTextColor(hDC, RGB(255, 255, 255)); } } return m_brush; } else { hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor); } return hbr; }