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Added clipping for Overflow/ScrollControl.

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This commit is contained in:
Sander Schobers 2021-07-19 07:59:02 +02:00
parent c0586c1d8f
commit 5dcecb8cc1
1 changed files with 32 additions and 4 deletions
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36
ui/overflow.go
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@ -11,6 +11,9 @@ type overflow struct {
Background color.Color
ClipHorizontal bool
ClipVertical bool
barWidth float32
desired geom.PointF32
bounds geom.RectangleF32
@ -26,18 +29,30 @@ type overflow struct {
type ScrollControl interface {
Control
SetBackgroundColor(color.Color)
SetClipHorizontal(bool)
SetClipVertical(bool)
SetScrollbarColor(bar color.Color, hover color.Color)
}
func BuildOverflow(content Control, build func(c ScrollControl)) ScrollControl {
o := &overflow{Proxy: Proxy{Content: content}}
o.hor = BuildScrollbar(OrientationHorizontal, func(*Scrollbar) {})
o.ver = BuildScrollbar(OrientationVertical, func(*Scrollbar) {})
if build != nil {
build(o)
}
return o
}
func Overflow(content Control) ScrollControl {
return OverflowBackground(content, nil)
}
func OverflowBackground(content Control, back color.Color) ScrollControl {
var o = &overflow{Proxy: Proxy{Content: content}, Background: back}
o.hor = BuildScrollbar(OrientationHorizontal, func(*Scrollbar) {})
o.ver = BuildScrollbar(OrientationVertical, func(*Scrollbar) {})
return o
return BuildOverflow(content, func(c ScrollControl) {
c.SetBackgroundColor(back)
})
}
func (o *overflow) shouldScroll(bounds geom.RectangleF32) (hor bool, ver bool) {
@ -53,6 +68,8 @@ func (o *overflow) shouldScroll(bounds geom.RectangleF32) (hor bool, ver bool) {
if hor && !ver {
ver = scroll(size.Y+o.barWidth, bounds.Dy())
}
hor = hor && !o.ClipHorizontal
ver = ver && !o.ClipVertical
return
}
@ -158,6 +175,17 @@ func (o *overflow) Render(ctx Context) {
bar.Render(ctx)
})
}
func (o *overflow) SetBackgroundColor(c color.Color) {
o.Background = c
}
func (o *overflow) SetClipHorizontal(clip bool) {
o.ClipHorizontal = clip
}
func (o *overflow) SetClipVertical(clip bool) {
o.ClipVertical = clip
}
func (o *overflow) SetScrollbarColor(bar color.Color, hover color.Color) {
o.hor.BarColor = bar