ref: ca677a50fd03b97e8421d5ddcc9c793338c81058
dir: /anim/anim.go/
package anim
import (
"9fans.net/go/draw"
"9fans.net/go/draw/memdraw"
"image"
"time"
"github.com/psilva261/xui"
"github.com/psilva261/xui/events"
"github.com/psilva261/xui/internal/color"
"github.com/psilva261/xui/layout"
"github.com/psilva261/xui/space"
)
type Interface interface {
}
type Anim struct {
Orig image.Point
x xui.Interface
images []*memdraw.Image
current *memdraw.Image
delay []int
delaySum []int
Margin space.Sp
}
func NewFromSeq(x xui.Interface, images []*memdraw.Image, delay []int) *Anim {
a := &Anim{
x: x,
images: images,
delay: delay,
}
a.delaySum = make([]int, len(a.delay))
for i := 0; i < len(a.delay); i++ {
a.delaySum[i] = a.delay[i]
if i > 0 {
a.delaySum[i] += a.delaySum[i-1]
}
}
var err error
a.current, err = memdraw.AllocImage(a.images[0].R, draw.ABGR32)
if err != nil {
panic(err.Error())
}
memdraw.FillColor(a.current, draw.Transparent)
return a
}
func (a Anim) CurrentFrame(unixNano int64) int {
m := a.delaySum[len(a.delay)-1]
aTime := int((unixNano/1e7) % int64(m))
for i, dc := range a.delaySum {
if aTime <= dc {
return i
}
}
return 0
}
func (a Anim) Event(events.Interface) {
}
func (a Anim) Render() *memdraw.Image {
t := time.Now().UnixNano()
f := a.CurrentFrame(t)
//orig := xy
a.current.Draw(a.images[f].R, a.images[f], image.ZP, color.EmptyMask, image.ZP, draw.SoverD)
return a.current
}
func (a Anim) Focus() {
}
func (a Anim) Layout() layout.Interface {
return layout.Inline{}
}
func (a Anim) Geom() (r image.Rectangle, margin space.Sp) {
return a.images[0].R, a.Margin
}