MeasureItem for dynamic font changing in a list control

Zafir's article on adjusting row height in a CListCtrl derived class needs to be adjusted when dealing with dynamic font changes. His sample causes some problems where the row height is not correctly computed to compensate for different video display modes.

The code snip below responds correctly to font changes by selecting the font object into the Client Dc, then obtains the text metrics. Note that we are adding tmHeight and tmExternalLeading values to cover the glyphs that extend beyond the normal height boundaries of a given font.

void CMyListCtrl::MeasureItem( LPMEASUREITEMSTRUCT lpMeasureItemStruct )
{
	CClientDC dc( this );
	CFont* pFont = GetFont();
	ASSERT( pFont );

	CFont* pOldFont = dc.SelectObject( pFont );
	ASSERT( pOldFont );

	TEXTMETRIC txtMetric;
	BOOL bRet = dc.GetTextMetrics( &txtMetric );
	ASSERT( bRet );

	int cyChar = txtMetric.tmHeight + txtMetric.tmExternalLeading;
	ASSERT( 0 != cyChar );

	lpMeasureItemStruct->itemHeight = cyChar;
}

Last updated: 29 July 1998 by Rob Osborne



Comments

  • You must say something about reflected messages.

    Posted by Legacy on 11/05/1998 12:00am

    Originally posted by: Mihai

    Sincerely, Mihai Filimon
    

    Reply
Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • When individual departments procure cloud service for their own use, they usually don't consider the hazardous organization-wide implications. Read this paper to learn best practices for setting up an internal, IT-based cloud brokerage function that service the entire organization. Find out how this approach enables you to retain top-down visibility and control of network security and manage the impact of cloud traffic on your WAN.

  • U.S. companies are desperately trying to recruit and hire skilled software engineers and developers, but there is simply not enough quality talent to go around. Tiempo Development is a nearshore software development company. Our headquarters are in AZ, but we are a pioneer and leader in outsourcing to Mexico, based on our three software development centers there. We have a proven process and we are experts at providing our customers with powerful solutions. We transform ideas into reality.

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date