32 lines
770 B
Go
32 lines
770 B
Go
package feedback
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import (
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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 PulseOptions struct {
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// Slot colors the ring; zero means Accent.
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Slot pixel.Slot
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}
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// Pulse rings its child with a ring growing in steps.
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func Pulse(c *ui.Context, o PulseOptions, content func()) *ui.Element {
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k := pixel.K(c)
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slot := o.Slot
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if slot == 0 {
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slot = pixel.Accent
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}
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return ui.Box(c).AlignSelf(ui.Start).Padding(k.D(6)).DrawOver(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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f := g.Step(6) % 6
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x, level := 5-f, 16-f*3
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w, h := g.W-2*x, g.H-2*x
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g.Veil(x, x, w, 1, slot, level)
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g.Veil(x, x+h-1, w, 1, slot, level)
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g.Veil(x, x, 1, h, slot, level)
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g.Veil(x+w-1, x, 1, h, slot, level)
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}).Children(content)
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}
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