func (l *List) SetScrollOffset(scrollOffset int) {
if l.adapter == nil {
return
}
s := l.outer.Size().Contract(l.outer.Padding())
if l.orientation.Horizontal() {
maxScroll := math.Max(l.itemSize.W*l.itemCount-s.W, 0)
scrollOffset = math.Clamp(scrollOffset, 0, maxScroll)
l.scrollBar.SetScrollPosition(scrollOffset, scrollOffset+s.W)
} else {
maxScroll := math.Max(l.itemSize.H*l.itemCount-s.H, 0)
scrollOffset = math.Clamp(scrollOffset, 0, maxScroll)
l.scrollBar.SetScrollPosition(scrollOffset, scrollOffset+s.H)
}
if l.scrollOffset != scrollOffset {
l.scrollOffset = scrollOffset
l.LayoutChildren()
}
}
func (l *CodeSyntaxLayer) UpdateSpans(runeCount int, edits []TextBoxEdit) {
min := 0
max := runeCount
for _, e := range edits {
if l == nil {
continue
}
for j, s := range l.spans {
at := e.At
start, end := s.Range()
if start >= at {
start = math.Clamp(start+e.Delta, min, max)
}
if end > at {
end = math.Clamp(end+e.Delta, min, max)
}
if end < start {
end = start
}
l.spans[j] = interval.CreateIntData(start, end, s.Data())
}
}
}
func (t *TextBoxController) updateSelectionsForEdits(edits []TextBoxEdit) {
min := 0
max := len(t.text)
selections := TextSelectionList{}
for _, selection := range t.selections {
for _, e := range edits {
at := e.At
delta := e.Delta
if selection.start > at {
selection.start += delta
}
if selection.end >= at {
selection.end += delta
}
}
if selection.end < selection.start {
selection.end = selection.start
}
selection.start = math.Clamp(selection.start, min, max)
selection.end = math.Clamp(selection.end, min, max)
interval.Merge(&selections, selection)
}
t.selections = selections
}
func (s *ScrollBar) updateBarRect() {
sf, st := s.ScrollFraction()
size := s.Size()
b := size.Rect()
halfMinLen := s.minBarLength / 2
if s.orientation.Horizontal() {
b.Min.X = math.Lerp(0, size.W, sf)
b.Max.X = math.Lerp(0, size.W, st)
if b.W() < s.minBarLength {
c := (b.Min.X + b.Max.X) / 2
c = math.Clamp(c, b.Min.X+halfMinLen, b.Max.X-halfMinLen)
b.Min.X, b.Max.X = c-halfMinLen, c+halfMinLen
}
} else {
b.Min.Y = math.Lerp(0, size.H, sf)
b.Max.Y = math.Lerp(0, size.H, st)
if b.H() < s.minBarLength {
c := (b.Min.Y + b.Max.Y) / 2
c = math.Clamp(c, b.Min.Y+halfMinLen, b.Max.Y-halfMinLen)
b.Min.Y, b.Max.Y = c-halfMinLen, c+halfMinLen
}
}
s.barRect = b
}
func (s *ScrollBar) rangeAt(p math.Point) (from, to int) {
width := s.scrollPositionTo - s.scrollPositionFrom
from = math.Clamp(s.positionAt(p), 0, s.scrollLimit-width)
to = from + width
return
}
func (o *BubbleOverlay) Paint(c gxui.Canvas) {
if !o.IsVisible() {
return
}
for _, child := range o.outer.Children() {
b := child.Bounds().Expand(o.outer.Padding())
t := o.targetPoint
a := o.arrowWidth / 2
var p gxui.Polygon
switch {
case t.X < b.Min.X:
/*
A-----------------B
G |
F |
E |
D-----------------C
*/
p = gxui.Polygon{
/*A*/ {Position: b.TL(), RoundedRadius: 5},
/*B*/ {Position: b.TR(), RoundedRadius: 5},
/*C*/ {Position: b.BR(), RoundedRadius: 5},
/*D*/ {Position: b.BL(), RoundedRadius: 5},
/*E*/ {Position: math.Point{X: b.Min.X, Y: math.Clamp(t.Y+a, b.Min.Y+a, b.Max.Y)}, RoundedRadius: 0},
/*F*/ {Position: t, RoundedRadius: 0},
/*G*/ {Position: math.Point{X: b.Min.X, Y: math.Clamp(t.Y-a, b.Min.Y, b.Max.Y-a)}, RoundedRadius: 0},
}
// fmt.Printf("A: %+v\n", p)
case t.X > b.Max.X:
/*
A-----------------B
| C
| D
| E
G-----------------F
*/
p = gxui.Polygon{
/*A*/ {Position: b.TL(), RoundedRadius: 5},
/*B*/ {Position: b.TR(), RoundedRadius: 5},
/*C*/ {Position: math.Point{X: b.Max.X, Y: math.Clamp(t.Y-a, b.Min.Y, b.Max.Y-a)}, RoundedRadius: 0},
/*D*/ {Position: t, RoundedRadius: 0},
/*E*/ {Position: math.Point{X: b.Max.X, Y: math.Clamp(t.Y+a, b.Min.Y+a, b.Max.Y)}, RoundedRadius: 0},
/*F*/ {Position: b.BR(), RoundedRadius: 5},
/*G*/ {Position: b.BL(), RoundedRadius: 5},
}
// fmt.Printf("B: %+v\n", p)
case t.Y < b.Min.Y:
/*
C
/ \
A-----------B D-E
| |
| |
G-----------------F
*/
p = gxui.Polygon{
/*A*/ {Position: b.TL(), RoundedRadius: 5},
/*B*/ {Position: math.Point{X: math.Clamp(t.X-a, b.Min.X, b.Max.X-a), Y: b.Min.Y}, RoundedRadius: 0},
/*C*/ {Position: t, RoundedRadius: 0},
/*D*/ {Position: math.Point{X: math.Clamp(t.X+a, b.Min.X+a, b.Max.X), Y: b.Min.Y}, RoundedRadius: 0},
/*E*/ {Position: b.TR(), RoundedRadius: 5},
/*F*/ {Position: b.BR(), RoundedRadius: 5},
/*G*/ {Position: b.BL(), RoundedRadius: 5},
}
// fmt.Printf("C: %+v\n", p)
default:
/*
A-----------------B
| |
| |
G-----------F D-C
\ /
E
*/
p = gxui.Polygon{
/*A*/ {Position: b.TL(), RoundedRadius: 5},
/*B*/ {Position: b.TR(), RoundedRadius: 5},
/*C*/ {Position: b.BR(), RoundedRadius: 5},
/*D*/ {Position: math.Point{X: math.Clamp(t.X+a, b.Min.X+a, b.Max.X), Y: b.Max.Y}, RoundedRadius: 0},
/*E*/ {Position: t, RoundedRadius: 0},
/*F*/ {Position: math.Point{X: math.Clamp(t.X-a, b.Min.X, b.Max.X-a), Y: b.Max.Y}, RoundedRadius: 0},
/*G*/ {Position: b.BL(), RoundedRadius: 5},
}
// fmt.Printf("D: %+v\n", p)
}
c.DrawPolygon(p, o.pen, o.brush)
}
o.PaintChildren.Paint(c)
}