C / C++ / MFC

• A dialog bar is not quite similar to a dialog box, although both can be based on a dialog template.
  That because CDialogBar is not derived from CDialog but from CControlBar.
  
• OnDraw is a virtual member function of CView which is called from within WM_PAINT message handler (OnPaint). Neither CDialog, nor CDialogBar have OnDraw method.
  
• If you need a text in a dialog box or a dialog bar is easier to put it in a static or edit control rather than drawing it in WM_PAINT message handler.
  

// MyDialogBar.h
class CMyDialogBar : public CDialogBar
{
// Construction
public:
   CMyDialogBar();
   
// ...
// Implementation
protected:
   
   // Generated message map functions
   //{{AFX_MSG(CMyDialogBar)
   afx_msg HBRUSH OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor);
   //}}AFX_MSG
   afx_msg LRESULT OnInitDialog (WPARAM wParam, LPARAM lParam); // <-- added by hand
   DECLARE_MESSAGE_MAP()
};

// MyDialogBar.cpp
// ...
MyDialogBar::CMyDialogBar()
{
// ...
}
void CMyDialogBar::DoDataExchange(CDataExchange* pDX)
{
   CDialogBar::DoDataExchange(pDX);
   //{{AFX_DATA_MAP(CMyDialogBar)
   // NOTE: the ClassWizard will add DDX and DDV calls here
   //}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CMyDialogBar, CDialogBar)
   //{{AFX_MSG_MAP(CMyDialogBar)
   ON_WM_CTLCOLOR()
   //}}AFX_MSG_MAP
   ON_MESSAGE(WM_INITDIALOG, OnInitDialog) // <-- added by hand
END_MESSAGE_MAP()

LRESULT CMyDialogBar::OnInitDialog (WPARAM wParam, LPARAM lParam)
{
   if (!HandleInitDialog(wParam, lParam) || !UpdateData(FALSE))
   {
      TRACE0("Warning: UpdateData failed during dialog init.\n");
      return (LRESULT)0;
   }
   CFont font;
   font.CreatePointFont(140, _T("Times New Roman"));
   CWnd* pEdit = GetDlgItem(IDC_EDIT_PATIENT);
   _ASSERTE(NULL != pEdit); // something stinks in here!
   pEdit->SetFont(&font); // set the "larger" font
   font.Detach();

   return (LRESULT)1;
}
HBRUSH CMyDialogBar::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) 
{
   HBRUSH hbr = CDialogBar::OnCtlColor(pDC, pWnd, nCtlColor);
   if(pWnd->m_hWnd == GetDlgItem(IDC_EDIT_PATIENT)->GetSafeHwnd())
   {
      pDC->SetTextColor(RGB(255,0,0)); // set red text color
      hbr = (HBRUSH)::GetStockObject(WHITE_BRUSH); // return valid brush handle
   }
   return hbr;
}

<br />
void CMyToolbar::SetPatInfo(void)<br />
{<br />
	int oldColor, bkgColor, oldMode, fontSize = 160;<br />
	int i, j;<br />
	CFont hFont, *hOldFont;<br />
	CBrush br1;<br />
	CWnd *wnd1;<br />
	CSize sz1, sz2;<br />
	CRect rc1;<br />
	CString textOut[4];<br />
	CDC *pDC;<br />
	CCardiacDoc *pDoc;<br />
	CCardiacView *vw = CCardiacView::GetView();<br />
	pDoc = vw->GetDocument();<br />
	textOut[0] = pDoc->m_patName;<br />
	if( textOut[0].IsEmpty()) <br />
		return;<br />
	textOut[1] = pDoc->m_patID;<br />
	textOut[2] = pDoc->m_imageData[0].m_acqDateTime.Format("%d-%b-%Y");<br />
	textOut[3] = pDoc->m_styName;<br />
	if( vw->m_masterFlg <= CCardiacView::VW_CARDIAC_DISP2)<br />
		textOut[3] = "Myocardial Perfusion";<br />
<br />
	wnd1 = GetDlgItem(IDC_PATINFO);<br />
	pDC = wnd1->GetDC();<br />
	bkgColor = pDC->GetBkColor();<br />
	sz1 = 0;<br />
	for( i=j=0; i< 4; i++) {<br />
		sz2 = pDC->GetTextExtent(textOut[i]);<br />
		if( sz2.cx > sz1.cx) {<br />
			sz1 = sz2;<br />
			j = i;	// j will be the maximum string<br />
		}<br />
	}<br />
<br />
	oldColor = pDC->SetTextColor( RGB(255,0,0));<br />
	oldMode = pDC->SetBkMode( TRANSPARENT);<br />
	wnd1->GetClientRect(&rc1);<br />
	wnd1->ValidateRect(rc1);<br />
	sz1.cx = rc1.right;<br />
	sz1.cy = rc1.bottom;<br />
	br1.CreateSolidBrush(bkgColor);<br />
	pDC->FillRect(rc1, &br1);<br />
	while( fontSize > 80) {<br />
		hFont.CreatePointFont( fontSize, "Ariel", pDC);<br />
		hOldFont = pDC->SelectObject( &hFont);<br />
		sz2 = pDC->GetTextExtent(textOut[j]);	// the longest one<br />
		if( sz2.cx <= sz1.cx) break;	// found a size<br />
		pDC->SelectObject( hOldFont);<br />
		DeleteObject( hFont);<br />
		hFont.Detach();<br />
		fontSize -= 20;	// reduce font size by 2<br />
	}<br />
	for( i=j=0; i<4; i++) {<br />
		if( j+sz2.cy > sz1.cy) break;	// no more room<br />
		pDC->TextOut(0,j,textOut[i]);<br />
		j += sz2.cy;<br />
	}<br />
	pDC->SelectObject( hOldFont);<br />
	DeleteObject( hFont);<br />
	pDC->SetTextColor( oldColor);<br />
	pDC->SetBkMode( oldMode);<br />
	ReleaseDC(pDC);<br />
}<br />
<br />
void CMyToolbar::OnPaint()<br />
{<br />
	CPaintDC dc(this); // device context for painting<br />
	SetPatInfo();<br />
}<br />
<br />
void CMyToolbar::Invalidate(void)<br />
{<br />
	CWnd *wnd1;<br />
	CRect rc1;<br />
	wnd1 = GetDlgItem(IDC_PATINFO);<br />
	wnd1->GetClientRect(&rc1);<br />
	wnd1->InvalidateRect(rc1,0);<br />
}<br />

double Foo(int i) { return (double) i; }
 
double (*pf)(int);
pf = &Foo;
double d = pf(4);

double* pf(int);
 
double* pd = pf(4);
double twice = (*pd) * 2;

PrabhuDev wrote:

I have a cscrollview in which i am filling the whole area with some color

Cedric Moonen wrote:

Wow, it's becoming popular

toxcct wrote:

you can find it in his signature, in any of his posts...