68 lines
1.4 KiB
Go
68 lines
1.4 KiB
Go
package feedback
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import (
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"strings"
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"github.com/egoist/mygo/ui"
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"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
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)
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type HourglassOptions struct{}
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// glass is the hourglass, by hand; # marks its walls.
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var glass = []string{
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"############",
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".#........#.",
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".#........#.",
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"..#......#..",
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"...#....#...",
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"....#..#....",
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".....##.....",
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".....##.....",
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"....#..#....",
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"...#....#...",
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"..#......#..",
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".#........#.",
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".#........#.",
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"############",
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}
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// Hourglass drains in steps, then flips.
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func Hourglass(c *ui.Context, text string, o HourglassOptions) *ui.Element {
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k := pixel.K(c)
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return ui.Box(c).Role(ui.RoleProgress).Label(text).Size(k.D(14), k.D(14)).Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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f := g.Busy(4) % 8
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// Frame 6 lies on its side, mid-flip; 7 rests.
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side := f == 6
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dot := func(x, y int, s pixel.Slot) {
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if side {
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g.Dot(y, 12-x, s)
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} else {
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g.Dot(x+1, y, s)
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}
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}
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top, bottom := 4-min(f, 4), min(f, 4)
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if f >= 6 {
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top, bottom = 4, 0
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}
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for y, row := range glass {
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l, r := strings.Index(row, "#"), strings.LastIndex(row, "#")
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for x := range len(row) {
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switch {
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case row[x] == '#':
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dot(x, y, pixel.Edge)
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case x > l && x < r && (y >= 6-top && y <= 5 || y >= 13-bottom && y <= 12):
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dot(x, y, pixel.Warn)
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}
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}
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}
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if f > 0 && f < 5 {
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for y := 6; y < 13-bottom; y++ {
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dot(5, y, pixel.Warn)
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}
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}
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})
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}
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