interesting
/
andlabs-ui
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

More documentation.

This commit is contained in:
Pietro Gagliardi 2016-01-16 18:27:18 -05:00
parent fdc9af39ac
commit 8dc672361e
1 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
draw.go
View File

@ -810,6 +810,16 @@ func (l *TextLayout) SetWidth(width float64) {
// even if no glyph reaches to the top of its ascent or bottom of its // even if no glyph reaches to the top of its ascent or bottom of its
// descent; it does not return a "best fit" rectnagle for the points that // descent; it does not return a "best fit" rectnagle for the points that
// are actually drawn. // are actually drawn.
//
// For a single-line TextLayout (where the width is negative), if there
// are no font changes throughout the TextLayout, then the height
// returned by TextLayout is equivalent to the sum of the ascent and
// descent of its default font's metrics. Or in other words, after
// f := ui.LoadClosestFont(...)
// l := ui.NewTextLayout("text", f, -1)
// metrics := f.Metrics()
// _, height := l.Extents()
// metrics.Ascent+metrics.Descent and height are equivalent.
func (l *TextLayout) Extents() (width float64, height float64) { func (l *TextLayout) Extents() (width float64, height float64) {
cwidth := C.newDouble() cwidth := C.newDouble()
cheight := C.newDouble() cheight := C.newDouble()