For some reason the DrawItem gets called repeatedly unit a stack exception occurs
That indicates that your DrawItem implementation might be called recursive (probably not directly but by calling a function that results in a redraw). So check your code for such calls. A drawing function should only draw the control itself and do nothing else like changing properties of the control. If you for example change the selection within the drawing function, that would trigger another redraw.
SetWindowText() sets the text and initiates drawing which must be implemented in your DrawItem function!
Example (copied & pasted, unchecked, unthemed classic method):
void CMyStatic::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
ASSERT(lpDrawItemStruct->CtlType == ODT_STATIC);
CDC* pDC = CDC::FromHandle(lpDrawItemStruct->hDC);
ASSERT(pDC != NULL);
// Get text format options.
UINT nFormat = m_nFormat;
// get actual settings in case they has been changed
DWORD dwStyle = GetStyle();
// Don't process '&' prefix sequencesif (dwStyle & SS_NOPREFIX)
nFormat |= DT_NOPREFIX;
// vertically centered text and no new lineif ((dwStyle & SS_CENTERIMAGE) && str.Find(_T('\n')) <0)
nFormat &= ~DT_WORDBREAK;
nFormat |= DT_VCENTER | DT_SINGLELINE; // must set both!
if (dwStyle & SS_ELLIPSISMASK)
nFormat &= ~DT_EXPANDTABS; // not supported with ellipsisswitch (dwStyle & SS_ELLIPSISMASK)
case SS_ENDELLIPSIS :
nFormat |= DT_END_ELLIPSIS | DT_MODIFYSTRING; break;
case SS_PATHELLIPSIS :
nFormat |= DT_PATH_ELLIPSIS | DT_MODIFYSTRING; break;
case SS_WORDELLIPSIS :
nFormat |= DT_WORD_ELLIPSIS; break;
// The complete background has just been filled.// So use transparent mode for faster text drawing.// Saving and restoring of colors and mode is not necessary (drawing only performed here).
pDC->SetTextColor(bDisabled ? ::GetSysColor(COLOR_GRAYTEXT) : m_clrText);
// The text string may be modified if DT_MODIFYSTRING is set!
LPTSTR lpszText = str.GetBuffer();
pDC->DrawText(lpszText, -1, &lpDrawItemStruct->rcItem, nFormat);
> 0 The font mapper transforms this value into device units and matches it against the cell height of the available fonts.
0 The font mapper uses a default height value when it searches for a match.
< 0 The font mapper transforms this value into device units and matches its absolute value against the character height of the available fonts.
Not quite sure what the above means but my question is the units sepcfied on the Crect parm of CStatic:Create the same as the units for lfHeight and lfWidth so if the width of my static control
is 20 and I specify 3 for lfWidth and I have 5 characters the would = 15 units
I'm writing a quick options dialog app, but am a little rusty with my MFC. In short, I have a list box to the left and a property sheet containing pages corresponding to the items in the list box. However, I want to hide the tab control of the property sheet and move the pages up to match the top of the list box.
Hiding the tab control is easy: CPropertySheet::GetTabControl()->ShowWindow(FALSE)
I then went down the path of grabbing the rects of things and subtracting, but I can't help but think I'm making this more complicated than it needs to be. (I did this once back in 2005, but don't have that code and can't remember what I did.)
i tryed to get it in c++
its a start
i been programming clasical computers for +-30 year's
i not even shure i wil understad this [ if ever ]
// bluatigro 8 nov 2017// QC sim// see :// https://quantumexperience.ng.bluemix.net/qx/experience
void rot( double & k , double & l , double r)
double s , c , hk , hl ;
s = sin( r ) ;
c = cos( r ) ;
hk = k * c - l * s ;
hl = k * s + l * c ;
k = hk ;
l = hl ;
constdouble PI = atn( 1.0 ) * 4.0 ;
double x , y , z ;
Qbit() // |0>
x = 0.0 ;
y = 0.0 ;
z = 1.0 ;
Qbit( double a , double b , double c )
x = a ;
y = b ;
z = c ;
rot( y , z , PI ) ;
rot( x , z , PI ) ;
rot( x , y , PI ) ;
void H() // |+>
rot( x , y , PI / 2 ) ;
rot( x , y , -PI / 2 ) ;
rot( x , y , PI / 4 ) ;
rot( x , y , -PI / 4 ) ;
return z <0.0 ? 1.0 : 0.0 ;
void cnot( Qbit & control , Qbit & target )
if ( control.get_state() == 1.0 )
target.z = 1.0 - target.z ;
usingnamespace std ;
cout << "Hello world!" << endl;