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.
35 lines
1007 B
Go
35 lines
1007 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 StepChartOptions struct {
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// Width and Height are dots; zeros mean 160 by 80.
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Width, Height int
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Slot pixel.Slot
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}
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// StepChart holds each value flat, then steps to the next.
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func StepChart(c *ui.Context, text string, labels []string, values []float64, o StepChartOptions) *ui.Element {
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k := pixel.K(c)
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w, h := size("StepChart", o.Width, o.Height, 160, 80)
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p := fitSeries(labels, []Series{{Name: text, Values: values}}, w, h)
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ink := pick(o.Slot, 0)
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return ui.Box(c).Size(k.D(w), k.D(h)).Role(ui.RoleImage).Label(text).Description(read(labels, values)).Draw(func(pt *ui.Painter, r ui.Rect) {
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g := k.Canvas(pt, r)
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p.grid(g, labels)
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n := len(values)
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for i, v := range values {
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x0, x1, y := p.x+i*p.w/n, p.x+(i+1)*p.w/n, p.at(v)
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g.HLine(x0, y, x1-x0, ink)
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if i+1 < n {
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y1 := p.at(values[i+1])
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g.VLine(x1, min(y, y1), abs(y-y1)+1, ink)
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}
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}
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})
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}
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