MeasureItem for dynamic font changing in a list control

WEBINAR:
Live

Full Text Search: The Key to Better Natural Language Queries for NoSQL in Node.js


Date: 1/31/2018 @ 2 p.m. ET

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  • Your email address will not be published.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

  • Using Internet of Things (IoT) technologies, colleges and universities are linking anything and everything to create new applications that elevate the campus experience. It's called a Smart Campus. And it's transforming campus life for students, faculty and visitors. When everything is connected, devices and applications can interact with users and with each other in ways that weren't possible before: digital classrooms, connected campus ID cards, connected lighting and building environmental systems and …

  • The software-defined data center (SDDC) and new trends in cloud and virtualization bring increased agility, automation, and intelligent services and management to all areas of the data center. Businesses can now more easily manage the entire lifecycle of their applications and services via the SDDC. This Aberdeen analyst report examines how a strong foundation in both the cloud and internal data centers is empowering organizations to fully leverage their IT infrastructure and is also preparing them to be able …

Most Popular Programming Stories

More for Developers

RSS Feeds

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