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Hi All,
I want to know what the line spacing is, and how is it calculated? I investigate Qt4 source codes, but I have no idea yet.
Example text:
Touch go to start
Press button to continue
The line spacing is:
From the bottom of the g in the first line to the top of the P in the second line, OR
From the bottom of the T of the first line to the top of the P of the second line?
And how does QT4 calcuate this value?
Thanks!
Search for leading. Then you will quickly figure out what line spacing means in typographie.Quote:
Originally Posted by smoozer
I haven't looked up the sources, but Qt should use QFontInfo for getting the height of a font and then calculating the spacing. Depending on the factor you have set.Quote:
, and how is it calculated? I investigate Qt4 source codes, but I have no idea yet.
Example text:
Touch go to start
Press button to continue
The line spacing is:
From the bottom of the g in the first line to the top of the P in the second line, OR
From the bottom of the T of the first line to the top of the P of the second line?
And how does QT4 calcuate this value?
Thanks!
Thank you. I found this figure, and know exactly what the property of one font.Quote:
Originally Posted by Lykurg
http://caterpillar.onlyfun.net/Gossi...QPainter-2.jpg
There is one question about leading:
QFixed QFontEngineWin::leading() const
{
return tm.w.tmExternalLeading;
}
The tm.w.tmExternalLeading is always 0 when I debug. Is that the leading in the figure above. And there is one member tm.w.tmInternalLeading, I think, it's the exact leading value. But no witness in source codes. Any idea? Thanks.
How about looking at QFontMetrics::leading() and QFontMetrics::lineSpacing()?