157 lines
3.4 KiB
Go
157 lines
3.4 KiB
Go
// Copyright 2015 Zack Guo <gizak@icloud.com>. All rights reserved.
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// Use of this source code is governed by a MIT license that can
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// be found in the LICENSE file.
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package termui
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import "math"
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// Sparkline is like: ▅▆▂▂▅▇▂▂▃▆▆▆▅▃
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/*
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data := []int{4, 2, 1, 6, 3, 9, 1, 4, 2, 15, 14, 9, 8, 6, 10, 13, 15, 12, 10, 5, 3, 6, 1}
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spl := termui.NewSparkline()
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spl.Data = data
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spl.Title = "Sparkline 0"
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spl.LineColor = termui.ColorGreen
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*/
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type Sparkline struct {
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Data []int
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Height int
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Title string
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TitleColor Attribute
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LineColor Attribute
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displayHeight int
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scale float32
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max int
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}
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// Sparklines is a renderable widget which groups together the given sparklines.
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/*
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spls := termui.NewSparklines(spl0,spl1,spl2) //...
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spls.Height = 2
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spls.Width = 20
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*/
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type Sparklines struct {
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Block
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Lines []Sparkline
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displayLines int
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displayWidth int
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}
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var sparks = []rune{'▁', '▂', '▃', '▄', '▅', '▆', '▇', '█'}
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// Add appends a given Sparkline to s *Sparklines.
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func (s *Sparklines) Add(sl Sparkline) {
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s.Lines = append(s.Lines, sl)
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}
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// NewSparkline returns a unrenderable single sparkline that intended to be added into Sparklines.
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func NewSparkline() Sparkline {
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return Sparkline{
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Height: 1,
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TitleColor: theme.SparklineTitle,
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LineColor: theme.SparklineLine}
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}
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// NewSparklines return a new *Spaklines with given Sparkline(s), you can always add a new Sparkline later.
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func NewSparklines(ss ...Sparkline) *Sparklines {
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s := &Sparklines{Block: *NewBlock(), Lines: ss}
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return s
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}
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func (sl *Sparklines) update() {
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for i, v := range sl.Lines {
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if v.Title == "" {
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sl.Lines[i].displayHeight = v.Height
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} else {
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sl.Lines[i].displayHeight = v.Height + 1
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}
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}
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sl.displayWidth = sl.innerWidth
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// get how many lines gotta display
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h := 0
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sl.displayLines = 0
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for _, v := range sl.Lines {
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if h+v.displayHeight <= sl.innerHeight {
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sl.displayLines++
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} else {
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break
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}
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h += v.displayHeight
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}
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for i := 0; i < sl.displayLines; i++ {
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data := sl.Lines[i].Data
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max := math.MinInt32
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for _, v := range data {
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if max < v {
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max = v
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}
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}
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sl.Lines[i].max = max
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sl.Lines[i].scale = float32(8*sl.Lines[i].Height) / float32(max)
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}
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}
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// Buffer implements Bufferer interface.
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func (sl *Sparklines) Buffer() []Point {
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ps := sl.Block.Buffer()
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sl.update()
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oftY := 0
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for i := 0; i < sl.displayLines; i++ {
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l := sl.Lines[i]
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data := l.Data
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if len(data) > sl.innerWidth {
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data = data[:sl.innerWidth]
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}
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if l.Title != "" {
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rs := trimStr2Runes(l.Title, sl.innerWidth)
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oftX := 0
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for _, v := range rs {
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w := charWidth(v)
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p := Point{}
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p.Ch = v
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p.Fg = l.TitleColor
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p.Bg = sl.BgColor
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p.X = sl.innerX + oftX
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p.Y = sl.innerY + oftY
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ps = append(ps, p)
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oftX += w
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}
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}
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for j, v := range data {
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h := int(float32(v)*l.scale + 0.5)
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barCnt := h / 8
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barMod := h % 8
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for jj := 0; jj < barCnt; jj++ {
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p := Point{}
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p.X = sl.innerX + j
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p.Y = sl.innerY + oftY + l.Height - jj
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p.Ch = ' ' // => sparks[7]
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p.Bg = l.LineColor
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//p.Bg = sl.BgColor
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ps = append(ps, p)
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}
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if barMod != 0 {
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p := Point{}
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p.X = sl.innerX + j
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p.Y = sl.innerY + oftY + l.Height - barCnt
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p.Ch = sparks[barMod-1]
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p.Fg = l.LineColor
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p.Bg = sl.BgColor
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ps = append(ps, p)
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}
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}
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oftY += l.displayHeight
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}
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return sl.Block.chopOverflow(ps)
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}
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