ZacharyZhang-NY
596c62e026
Bars, lines, areas, pies, donuts, radar, histogram, scatter, bubbles, heatmaps, gauge, bullet, funnel, waterfall, treemap, candles, box plots, steps, rings, legend, axis, crosshair, polar area, pyramid, spectrum bars and win-loss strips, each drawn dot by dot. Ticks follow 1-2-5 steps and print as precisely as their step needs; a label row uses micro letters or the pixel font as a whole. Descriptions carry the data in numbers. Bad data panics.
28 lines
767 B
Go
28 lines
767 B
Go
package chart
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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 PieChartOptions struct {
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// Size is the pie's width in dots; zero means 64.
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Size int
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}
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// PieChart rasterizes one sector per slice, dot by dot.
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func PieChart(c *ui.Context, text string, slices []Slice, o PieChartOptions) *ui.Element {
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k := pixel.K(c)
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n := pixel.Or("PieChart Size", o.Size, 64)
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_, cuts := shares(slices)
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return ui.Box(c).Size(k.D(n), k.D(n)).Role(ui.RoleImage).Label(text).Description(readSlices(slices)).Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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c, rad := n/2, n/2-1
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for i, s := range slices {
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sector(g, c, c, 0, rad, cuts[i], cuts[i+1], pick(s.Slot, i))
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}
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g.Circle(c, c, rad, pixel.Edge)
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})
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}
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