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07.28.2008 at 09:10PM PDT, ID: 23602878
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8.0

How do I use DrawText to break a sentence without DT_WORDBREAK flag specified?

Asked by talltk in Windows MFC Programming, Windows Programming, Microsoft Visual C++

Tags:

Ok here's the scenario:

I have a custom combo box with Owner Draw being set to variable.  In my DrawItem Function, I used dc.DrawText() to draw the text in my combo box.  I have implemented the combo box to be of multiple lines depending on the length of text entered. The text added to the combo box is:

"The model of camera is: s1/s2/s3/s4/s5/s6/s7/s8/s8/s10/s11/s12"  

With DT_LEFT | DT_WORDBREAK flags specified, the above will appear as :

"The model of camera is:
s1/s2/s3/s4/s5/s6/s7/s8/s8/"

the models "s/10/s11/s12" is not displayed because  "s1/s2/s3/s4/s5/s6/s7/s8/s8/s10/s11/s12"  is considered as one word and the rest of the word is too long to be viewed in the combo box.  Extending the length of the combo box is not an option.  

I am looking for a solution so that the sentence can be cut at various places (even in between a word) so that the entire sentence can be displayed as one item of the combo box.  Something like this is my desirable output:

"The model of camera is:
s1/s2/s3/s4/s5/s6/s7/s
8/s8/s10/s11/s12"

[The model s8 is cut in between the s and the 8]

I don't think DT_WORDBREAK can be set if I want such an output.  Please advise.

I will provide my DrawItem and MeasureItem code for reference.
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void CMyBox::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
	 ASSERT(lpDrawItemStruct->CtlType == ODT_COMBOBOX);
 
	 // 1 - Get combobox item ID
	 UINT id = (UINT) (WORD) lpDrawItemStruct->itemID;
 
	 // Consistency checks
	 ASSERT(id == lpDrawItemStruct->itemID);
 
	 // 2 - Get device context & item rectangle
	 CDC dc;
	 dc.Attach(lpDrawItemStruct->hDC);
 
	 CRect rcItem = lpDrawItemStruct->rcItem;
	 int nCurrentX = rcItem.left;
 
	 // 3 - Select background and foreground
	 // colors depending on item selected state
	 COLORREF crBack, crFore;
	 if(lpDrawItemStruct->itemState & ODS_SELECTED)
	 {
		 crBack = ::GetSysColor(COLOR_HIGHLIGHT);
		 crFore = ::GetSysColor(COLOR_HIGHLIGHTTEXT);
	 }
	 else
	 {
		 crBack = ::GetSysColor(COLOR_WINDOW);
		 crFore = ::GetSysColor(COLOR_WINDOWTEXT);
	 }
 
	 // 4 - Fill item background
	 CRect rcBack(nCurrentX, rcItem.top, rcItem.right, rcItem.bottom);
	 CBrush brFill(crBack);
	 dc.FillRect(&rcBack, &brFill);
	 
	 // 5 - Draw item color rectangle
	 CBrush brColor(::GetSysColor(COLOR_WINDOWTEXT));
	 CBrush* pOldBrush = dc.SelectObject(&brColor);
	 CRect rcColor(nCurrentX, rcItem.top, nCurrentX, rcItem.bottom);
	 dc.Rectangle(rcColor);
	 dc.SelectObject(pOldBrush);
 
	 // 6 - Draw item text
	 COLORREF crOldTextColor = dc.SetTextColor(crFore);
	 int nOldBkMode = dc.SetBkMode(TRANSPARENT);
	 CString str;
	 this->GetLBText(id, str);
	 dc.DrawText(str, -1, rcItem, DT_LEFT|DT_WORDBREAK);
	 dc.DrawTextEx
	 dc.SetTextColor(crOldTextColor);
	 dc.SetBkMode(nOldBkMode);
	 dc.Detach();
}
 
void CMyBox::MeasureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct)
{
	/*DWORD dwStyle = ::GetWindowLong( m_hWnd, GWL_STYLE );*/
	/*ASSERT( dwStyle & CBS_DROPDOWNLIST );*/
 
	CFont* pFont = GetFont();
	CFont* pOldFont = 0;
	CString str;
	CDC* pDC = GetDC();
	pOldFont = pDC->SelectObject(pFont);
 
	// Get text from combo box
	this->GetLBText(lpMeasureItemStruct->itemID, str);
 
	// Obtain rectangle that text is originally in
	CRect rc;
	GetClientRect(&rc);
	//GetWindowRect(&rc);
	rc.left = 0;
	rc.top = 0;
	rc.bottom = 0;
 
	// With the inclusion of DT_CALCRECT
	// this DrawText does not draw the text
	// it just measures the rectangle
	pDC->DrawText(str, str.GetLength(), &rc, DT_CALCRECT|DT_LEFT|DT_WORDBREAK); 
	lpMeasureItemStruct->itemHeight = rc.bottom;
	pDC->SelectObject(pOldFont);
	ReleaseDC(pDC); 
}
 
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[+][-]07.29.2008 at 02:43AM PDT, ID: 22109823

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[+][-]07.29.2008 at 06:13PM PDT, ID: 22116913

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[+][-]07.30.2008 at 03:51AM PDT, ID: 22119120

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About this solution

Zones: Windows MFC Programming, Windows Programming, Microsoft Visual C++
Tags: C++ MFC
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Solution Provided By: alb66
Participating Experts: 1
Solution Grade: A
 
 
 
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