Files
8bitMyGoUI/feedback/loadingscreen.go
T

39 lines
1.0 KiB
Go

package feedback
import (
"strings"
"github.com/egoist/mygo/ui"
"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
)
type LoadingScreenOptions struct {
// Tips take turns, four seconds each.
Tips []string
// Width is in dots; zero means 240.
Width int
}
// LoadingScreen shows NOW LOADING, stepping dots and a tip.
func LoadingScreen(c *ui.Context, o LoadingScreenOptions) *ui.Element {
k := pixel.K(c)
w := pixel.Or("LoadingScreen Width", o.Width, 240)
title := k.Msg("loading")
return ui.Box(c).Role(ui.RoleStatus).Label(title).Size(k.D(w), k.D(2*pixel.LineHeight+8+2*pixel.LineHeight)).Draw(func(p *ui.Painter, r ui.Rect) {
g := k.Canvas(p, r)
n := g.Busy(4)
line := title + strings.Repeat(".", n%4)
x := (w - pixel.Measure(title+"...")*2) / 2
g.Text(x+2, 2, line, pixel.Shade, 2)
g.Text(x, 0, line, pixel.Accent, 2)
if len(o.Tips) == 0 {
return
}
tip := o.Tips[n/16%len(o.Tips)]
for i, l := range pixel.Wrap(tip, w, 2) {
g.Text((w-pixel.Measure(l))/2, 2*pixel.LineHeight+8+i*pixel.LineHeight, l, pixel.Faint, 1)
}
})
}