wip
This commit is contained in:
parent
7d1401898a
commit
7ba2992824
267
_examples/candlestick_series/main.go
Normal file
267
_examples/candlestick_series/main.go
Normal file
|
@ -0,0 +1,267 @@
|
|||
package main
|
||||
|
||||
import (
|
||||
"net/http"
|
||||
"strings"
|
||||
"time"
|
||||
|
||||
chart "github.com/wcharczuk/go-chart"
|
||||
"github.com/wcharczuk/go-chart/seq"
|
||||
util "github.com/wcharczuk/go-chart/util"
|
||||
)
|
||||
|
||||
type price struct {
|
||||
Timestamp string
|
||||
Price float64
|
||||
}
|
||||
|
||||
func (p price) format() (time.Time, float64) {
|
||||
t, err := time.ParseInLocation("2006-01-02 15:04:05", strings.Split(p.Timestamp, ".")[0], util.Date.Eastern())
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
return t, p.Price
|
||||
}
|
||||
|
||||
func stockData() (times []time.Time, prices []float64) {
|
||||
rawPrices := []price{
|
||||
{"2017-05-12 19:45:04.482809", 238.84},
|
||||
{"2017-05-12 19:30:04.349476", 238.92},
|
||||
{"2017-05-12 19:15:04.160628", 238.98},
|
||||
{"2017-05-12 19:00:03.994135", 239.05},
|
||||
{"2017-05-12 18:45:03.947176", 238.87},
|
||||
{"2017-05-12 18:30:03.653826", 238.97},
|
||||
{"2017-05-12 18:15:03.319783", 239.00},
|
||||
{"2017-05-12 18:00:03.293044", 238.87},
|
||||
{"2017-05-12 17:45:03.010216", 238.85},
|
||||
{"2017-05-12 17:30:07.808406", 238.84},
|
||||
{"2017-05-12 17:15:02.814348", 238.93},
|
||||
{"2017-05-12 17:00:03.153611", 239.00},
|
||||
{"2017-05-12 16:45:02.352906", 238.93},
|
||||
{"2017-05-12 16:30:02.339523", 239.00},
|
||||
{"2017-05-12 16:15:02.051624", 239.05},
|
||||
{"2017-05-12 16:00:01.920557", 239.10},
|
||||
{"2017-05-12 15:45:06.866833", 239.00},
|
||||
{"2017-05-12 15:30:01.60765", 238.92},
|
||||
{"2017-05-12 15:15:01.481936", 238.80},
|
||||
{"2017-05-12 15:00:01.298738", 238.85},
|
||||
{"2017-05-12 14:45:01.19513", 238.78},
|
||||
{"2017-05-12 14:30:01.037173", 239.03},
|
||||
{"2017-05-12 14:15:00.835599", 239.02},
|
||||
{"2017-05-12 14:00:00.654748", 239.00},
|
||||
{"2017-05-12 13:45:00.65331", 239.05},
|
||||
{"2017-05-11 19:45:03.940287", 239.26},
|
||||
{"2017-05-11 19:30:03.796674", 239.42},
|
||||
{"2017-05-11 19:15:03.709477", 239.31},
|
||||
{"2017-05-11 19:00:03.533934", 239.37},
|
||||
{"2017-05-11 18:45:03.383436", 239.44},
|
||||
{"2017-05-11 18:30:03.224035", 239.23},
|
||||
{"2017-05-11 18:15:03.127204", 239.31},
|
||||
{"2017-05-11 18:00:02.8859", 239.27},
|
||||
{"2017-05-11 17:45:02.796172", 239.00},
|
||||
{"2017-05-11 17:30:02.767553", 239.12},
|
||||
{"2017-05-11 17:15:02.56807", 238.96},
|
||||
{"2017-05-11 17:00:02.613708", 239.08},
|
||||
{"2017-05-11 16:45:02.348852", 238.99},
|
||||
{"2017-05-11 16:30:02.165067", 238.84},
|
||||
{"2017-05-11 16:15:02.043199", 238.69},
|
||||
{"2017-05-11 16:00:01.831857", 238.67},
|
||||
{"2017-05-11 15:45:01.705654", 238.72},
|
||||
{"2017-05-11 15:30:01.641864", 238.75},
|
||||
{"2017-05-11 15:15:01.387109", 238.58},
|
||||
{"2017-05-11 15:00:01.212597", 238.53},
|
||||
{"2017-05-11 14:45:01.148888", 238.35},
|
||||
{"2017-05-11 14:30:00.915767", 238.59},
|
||||
{"2017-05-11 14:15:00.655649", 238.55},
|
||||
{"2017-05-11 14:00:00.596624", 239.05},
|
||||
{"2017-05-11 13:45:00.565487", 239.36},
|
||||
{"2017-05-10 19:45:04.220057", 239.69},
|
||||
{"2017-05-10 19:30:04.102519", 239.82},
|
||||
{"2017-05-10 19:15:03.950613", 239.77},
|
||||
{"2017-05-10 19:00:03.871972", 239.73},
|
||||
{"2017-05-10 18:45:03.697585", 239.59},
|
||||
{"2017-05-10 18:30:03.490385", 239.72},
|
||||
{"2017-05-10 18:15:03.327691", 239.71},
|
||||
{"2017-05-10 18:00:03.277211", 239.68},
|
||||
{"2017-05-10 17:45:03.270592", 239.76},
|
||||
{"2017-05-10 17:30:03.124085", 239.69},
|
||||
{"2017-05-10 17:15:02.811264", 239.76},
|
||||
{"2017-05-10 17:00:02.696942", 239.71},
|
||||
{"2017-05-10 16:45:02.435806", 239.66},
|
||||
{"2017-05-10 16:30:02.373372", 239.65},
|
||||
{"2017-05-10 16:15:02.130672", 239.66},
|
||||
{"2017-05-10 16:00:02.04879", 239.71},
|
||||
{"2017-05-10 15:45:01.91206", 239.74},
|
||||
{"2017-05-10 15:30:01.710121", 239.57},
|
||||
{"2017-05-10 15:15:01.485801", 239.39},
|
||||
{"2017-05-10 15:00:01.43788", 239.44},
|
||||
{"2017-05-10 14:45:01.184263", 239.25},
|
||||
{"2017-05-10 14:30:00.940762", 239.45},
|
||||
{"2017-05-10 14:15:00.885742", 239.41},
|
||||
{"2017-05-10 14:00:00.640709", 239.38},
|
||||
{"2017-05-10 13:45:00.548287", 239.38},
|
||||
{"2017-05-09 19:45:04.220057", 239.69},
|
||||
{"2017-05-09 19:30:04.102519", 239.82},
|
||||
{"2017-05-09 19:15:03.950613", 239.77},
|
||||
{"2017-05-09 19:00:03.871972", 239.73},
|
||||
{"2017-05-09 18:45:03.697585", 239.59},
|
||||
{"2017-05-09 18:30:03.490385", 239.72},
|
||||
{"2017-05-09 18:15:03.327691", 239.71},
|
||||
{"2017-05-09 18:00:03.277211", 239.68},
|
||||
{"2017-05-09 17:45:03.270592", 239.76},
|
||||
{"2017-05-09 17:30:03.124085", 239.69},
|
||||
{"2017-05-09 17:15:02.811264", 239.76},
|
||||
{"2017-05-09 17:00:02.696942", 239.71},
|
||||
{"2017-05-09 16:45:02.435806", 239.66},
|
||||
{"2017-05-09 16:30:02.373372", 239.65},
|
||||
{"2017-05-09 16:15:02.130672", 239.66},
|
||||
{"2017-05-09 16:00:02.04879", 239.71},
|
||||
{"2017-05-09 15:45:01.91206", 239.74},
|
||||
{"2017-05-09 15:30:01.710121", 239.57},
|
||||
{"2017-05-09 15:15:01.485801", 239.39},
|
||||
{"2017-05-09 15:00:01.43788", 239.44},
|
||||
{"2017-05-09 14:45:01.184263", 239.25},
|
||||
{"2017-05-09 14:30:00.940762", 239.45},
|
||||
{"2017-05-09 14:15:00.885742", 239.41},
|
||||
{"2017-05-09 14:00:00.640709", 239.38},
|
||||
{"2017-05-09 13:45:00.548287", 239.38},
|
||||
{"2017-05-05 19:45:04.220057", 239.69},
|
||||
{"2017-05-05 19:30:04.102519", 239.82},
|
||||
{"2017-05-05 19:15:03.950613", 239.77},
|
||||
{"2017-05-05 19:00:03.871972", 239.73},
|
||||
{"2017-05-05 18:45:03.697585", 239.59},
|
||||
{"2017-05-05 18:30:03.490385", 239.72},
|
||||
{"2017-05-05 18:15:03.327691", 239.71},
|
||||
{"2017-05-05 18:00:03.277211", 239.68},
|
||||
{"2017-05-05 17:45:03.270592", 239.76},
|
||||
{"2017-05-05 17:30:03.124085", 239.69},
|
||||
{"2017-05-05 17:15:02.811264", 239.76},
|
||||
{"2017-05-05 17:00:02.696942", 239.71},
|
||||
{"2017-05-05 16:45:02.435806", 239.66},
|
||||
{"2017-05-05 16:30:02.373372", 239.65},
|
||||
{"2017-05-05 16:15:02.130672", 239.66},
|
||||
{"2017-05-05 16:00:02.04879", 239.71},
|
||||
{"2017-05-05 15:45:01.91206", 239.74},
|
||||
{"2017-05-05 15:30:01.710121", 239.57},
|
||||
{"2017-05-05 15:15:01.485801", 239.39},
|
||||
{"2017-05-05 15:00:01.43788", 239.44},
|
||||
{"2017-05-05 14:45:01.184263", 239.25},
|
||||
{"2017-05-05 14:30:00.940762", 239.45},
|
||||
{"2017-05-05 14:15:00.885742", 239.41},
|
||||
{"2017-05-05 14:00:00.640709", 239.38},
|
||||
{"2017-05-05 13:45:00.548287", 239.38},
|
||||
{"2017-05-03 19:45:04.220057", 239.69},
|
||||
{"2017-05-03 19:30:04.102519", 239.82},
|
||||
{"2017-05-03 19:15:03.950613", 239.77},
|
||||
{"2017-05-03 19:00:03.871972", 239.73},
|
||||
{"2017-05-03 18:45:03.697585", 239.59},
|
||||
{"2017-05-03 18:30:03.490385", 239.72},
|
||||
{"2017-05-03 18:15:03.327691", 239.71},
|
||||
{"2017-05-03 18:00:03.277211", 239.68},
|
||||
{"2017-05-03 17:45:03.270592", 239.76},
|
||||
{"2017-05-03 17:30:03.124085", 239.69},
|
||||
{"2017-05-03 17:15:02.811264", 239.76},
|
||||
{"2017-05-03 17:00:02.696942", 239.71},
|
||||
{"2017-05-03 16:45:02.435806", 239.66},
|
||||
{"2017-05-03 16:30:02.373372", 239.65},
|
||||
{"2017-05-03 16:15:02.130672", 239.66},
|
||||
{"2017-05-03 16:00:02.04879", 239.71},
|
||||
{"2017-05-03 15:45:01.91206", 239.74},
|
||||
{"2017-05-03 15:30:01.710121", 239.57},
|
||||
{"2017-05-03 15:15:01.485801", 239.39},
|
||||
{"2017-05-03 15:00:01.43788", 239.44},
|
||||
{"2017-05-03 14:45:01.184263", 239.25},
|
||||
{"2017-05-03 14:30:00.940762", 239.45},
|
||||
{"2017-05-03 14:15:00.885742", 239.41},
|
||||
{"2017-05-03 14:00:00.640709", 239.38},
|
||||
{"2017-05-03 13:45:00.548287", 239.38},
|
||||
{"2017-04-28 19:45:04.193877", 238.11},
|
||||
{"2017-04-28 19:30:04.078242", 238.20},
|
||||
{"2017-04-28 19:15:03.886795", 238.05},
|
||||
{"2017-04-28 19:00:03.797682", 238.08},
|
||||
{"2017-04-28 18:45:03.691054", 238.05},
|
||||
{"2017-04-28 18:30:03.513045", 237.96},
|
||||
{"2017-04-28 18:15:03.387037", 238.09},
|
||||
{"2017-04-28 18:00:03.303554", 238.11},
|
||||
{"2017-04-28 17:45:03.181305", 238.16},
|
||||
{"2017-04-28 17:30:08.066927", 238.17},
|
||||
{"2017-04-28 17:15:02.708957", 238.23},
|
||||
{"2017-04-28 17:00:02.673222", 238.27},
|
||||
{"2017-04-28 16:45:02.478988", 238.29},
|
||||
{"2017-04-28 16:30:02.299229", 238.24},
|
||||
{"2017-04-28 16:15:02.100061", 238.15},
|
||||
{"2017-04-28 16:00:01.922355", 238.06},
|
||||
{"2017-04-28 15:45:01.666185", 238.25},
|
||||
{"2017-04-28 15:30:01.477215", 238.19},
|
||||
{"2017-04-28 15:15:01.440657", 238.39},
|
||||
{"2017-04-28 15:00:01.222734", 238.39},
|
||||
{"2017-04-28 14:45:01.005045", 238.33},
|
||||
{"2017-04-28 14:30:00.935222", 238.46},
|
||||
{"2017-04-28 14:15:00.84484", 238.53},
|
||||
{"2017-04-28 14:00:00.635436", 238.52},
|
||||
{"2017-04-27 19:45:04.242597", 238.61},
|
||||
}
|
||||
|
||||
var t time.Time
|
||||
var v float64
|
||||
var p price
|
||||
for i := len(rawPrices) - 1; i >= 0; i-- {
|
||||
p = rawPrices[i]
|
||||
t, v = p.format()
|
||||
times = append(times, t)
|
||||
prices = append(prices, v)
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func drawChart(res http.ResponseWriter, req *http.Request) {
|
||||
xv, yv := stockData()
|
||||
|
||||
priceSeries := chart.TimeSeries{
|
||||
Name: "SPY",
|
||||
Style: chart.Style{
|
||||
Show: true,
|
||||
StrokeColor: chart.GetDefaultColor(0),
|
||||
},
|
||||
XValues: xv,
|
||||
YValues: yv,
|
||||
}
|
||||
|
||||
candleSeries := chart.CandlestickSeries{
|
||||
Name: "SPY",
|
||||
XValues: xv,
|
||||
YValues: yv,
|
||||
}
|
||||
|
||||
graph := chart.Chart{
|
||||
XAxis: chart.XAxis{
|
||||
Style: chart.Style{Show: true},
|
||||
TickPosition: chart.TickPositionBetweenTicks,
|
||||
Range: &chart.MarketHoursRange{
|
||||
Min: seq.Times(xv...).Min().In(util.Date.Eastern()),
|
||||
Max: seq.Times(xv...).Max().In(util.Date.Eastern()),
|
||||
MarketOpen: util.NYSEOpen(),
|
||||
MarketClose: util.NYSEClose(),
|
||||
HolidayProvider: util.Date.IsNYSEHoliday,
|
||||
},
|
||||
},
|
||||
YAxis: chart.YAxis{
|
||||
Style: chart.Style{Show: true},
|
||||
},
|
||||
Series: []chart.Series{
|
||||
candleSeries,
|
||||
priceSeries,
|
||||
},
|
||||
}
|
||||
|
||||
res.Header().Set("Content-Type", "image/png")
|
||||
err := graph.Render(chart.PNG, res)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
}
|
||||
|
||||
func main() {
|
||||
http.HandleFunc("/", drawChart)
|
||||
http.ListenAndServe(":8080", nil)
|
||||
}
|
|
@ -18,6 +18,11 @@ type CandleValue struct {
|
|||
Close float64
|
||||
}
|
||||
|
||||
// String returns a string value for the candle value.
|
||||
func (cv CandleValue) String() string {
|
||||
return fmt.Sprintf("candle %s high: %.2f low: %.2f open: %.2f close: %.2f", cv.Timestamp.Format("2006-01-02"), cv.High, cv.Low, cv.Open, cv.Close)
|
||||
}
|
||||
|
||||
// IsZero returns if the value is zero or not.
|
||||
func (cv CandleValue) IsZero() bool {
|
||||
return cv.Timestamp.IsZero()
|
||||
|
@ -29,7 +34,9 @@ type CandlestickSeries struct {
|
|||
Name string
|
||||
Style Style
|
||||
YAxis YAxisType
|
||||
InnerSeries ValuesProvider
|
||||
|
||||
XValues []time.Time
|
||||
YValues []float64
|
||||
}
|
||||
|
||||
// GetName implements Series.GetName.
|
||||
|
@ -47,37 +54,45 @@ func (cs CandlestickSeries) GetYAxis() YAxisType {
|
|||
return cs.YAxis
|
||||
}
|
||||
|
||||
// Len returns the length of the series.
|
||||
func (cs CandlestickSeries) Len() int {
|
||||
return util.Math.MinInt(len(cs.XValues), len(cs.YValues))
|
||||
}
|
||||
|
||||
// GetValues returns the values at a given index.
|
||||
func (cs CandlestickSeries) GetValues(index int) (time.Time, float64) {
|
||||
return cs.XValues[index], cs.YValues[index]
|
||||
}
|
||||
|
||||
// CandleValues returns the candlestick values for each day represented by the inner series.
|
||||
func (cs CandlestickSeries) CandleValues() []CandleValue {
|
||||
// for each "day" represented by the inner series
|
||||
// compute the open (i.e. the first value at or near market open)
|
||||
// compute the close (i.e. the last value at or near market close)
|
||||
// compute the high, or the max
|
||||
// compute the low, or the min
|
||||
|
||||
totalValues := cs.InnerSeries.Len()
|
||||
totalValues := cs.Len()
|
||||
if totalValues == 0 {
|
||||
return nil
|
||||
}
|
||||
|
||||
var value CandleValue
|
||||
var values []CandleValue
|
||||
var lastYear, lastMonth, lastDay int
|
||||
var year, month, day int
|
||||
|
||||
var tv float64
|
||||
var t time.Time
|
||||
var lv, v float64
|
||||
|
||||
tv, v = cs.InnerSeries.GetValues(0)
|
||||
t = util.Time.FromFloat64(tv)
|
||||
t, v = cs.GetValues(0)
|
||||
year, month, day = t.Year(), int(t.Month()), t.Day()
|
||||
value.Timestamp = cs.newTimestamp(year, month, day)
|
||||
value.Open, value.Low, value.High = v, v, v
|
||||
|
||||
lastYear, lastMonth, lastDay = year, month, day
|
||||
|
||||
value := CandleValue{
|
||||
Timestamp: cs.newTimestamp(year, month, day),
|
||||
Open: v,
|
||||
Low: v,
|
||||
High: v,
|
||||
}
|
||||
lv = v
|
||||
|
||||
for i := 1; i < totalValues; i++ {
|
||||
tv, v = cs.InnerSeries.GetValues(i)
|
||||
t = util.Time.FromFloat64(tv)
|
||||
t, v = cs.GetValues(i)
|
||||
year, month, day = t.Year(), int(t.Month()), t.Day()
|
||||
|
||||
// if we've transitioned to a new day or we're on the last value
|
||||
|
@ -87,11 +102,18 @@ func (cs CandlestickSeries) CandleValues() []CandleValue {
|
|||
|
||||
value = CandleValue{
|
||||
Timestamp: cs.newTimestamp(year, month, day),
|
||||
}
|
||||
Open: v,
|
||||
High: v,
|
||||
Low: v,
|
||||
}
|
||||
|
||||
lastYear = year
|
||||
lastMonth = month
|
||||
lastDay = day
|
||||
} else {
|
||||
value.Low = math.Min(value.Low, v)
|
||||
value.High = math.Max(value.Low, v)
|
||||
value.High = math.Max(value.High, v)
|
||||
}
|
||||
lv = v
|
||||
}
|
||||
|
||||
|
@ -104,14 +126,17 @@ func (cs CandlestickSeries) newTimestamp(year, month, day int) time.Time {
|
|||
|
||||
// Render implements Series.Render.
|
||||
func (cs CandlestickSeries) Render(r Renderer, canvasBox Box, xrange, yrange Range, defaults Style) {
|
||||
//style := cs.Style.InheritFrom(defaults)
|
||||
//Draw.CandlestickSeries(r, canvasBox, xrange, yrange, style, cs)
|
||||
style := cs.Style.InheritFrom(defaults)
|
||||
Draw.CandlestickSeries(r, canvasBox, xrange, yrange, style, cs)
|
||||
}
|
||||
|
||||
// Validate validates the series.
|
||||
func (cs CandlestickSeries) Validate() error {
|
||||
if cs.InnerSeries == nil {
|
||||
return fmt.Errorf("histogram series requires InnerSeries to be set")
|
||||
if cs.XValues == nil {
|
||||
return fmt.Errorf("candlestick series requires `XValues` to be set")
|
||||
}
|
||||
if cs.YValues == nil {
|
||||
return fmt.Errorf("candlestick series requires `YValues` to be set")
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
|
|
@ -10,21 +10,28 @@ import (
|
|||
)
|
||||
|
||||
func generateDummyStockData() (times []time.Time, prices []float64) {
|
||||
start := util.Date.On(time.Date(2017, 05, 15, 6, 30, 0, 0, util.Date.Eastern()), util.NYSEOpen())
|
||||
var cursor time.Time
|
||||
start := util.Date.On(util.NYSEOpen(), time.Date(2017, 05, 15, 0, 0, 0, 0, util.Date.Eastern()))
|
||||
cursor := start
|
||||
for day := 0; day < 60; day++ {
|
||||
|
||||
if util.Date.IsWeekendDay(cursor.Weekday()) {
|
||||
cursor = start.AddDate(0, 0, day)
|
||||
continue
|
||||
}
|
||||
|
||||
for hour := 0; hour < 7; hour++ {
|
||||
for minute := 0; minute < 60; minute++ {
|
||||
times = append(times, cursor)
|
||||
prices = append(prices, rand.Float64()*256)
|
||||
|
||||
cursor = cursor.Add(time.Minute)
|
||||
}
|
||||
|
||||
cursor = cursor.Add(time.Hour)
|
||||
}
|
||||
|
||||
cursor = start.AddDate(0, 0, day)
|
||||
}
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
|
@ -34,12 +41,10 @@ func TestCandlestickSeriesCandleValues(t *testing.T) {
|
|||
xdata, ydata := generateDummyStockData()
|
||||
|
||||
candleSeries := CandlestickSeries{
|
||||
InnerSeries: TimeSeries{
|
||||
XValues: xdata,
|
||||
YValues: ydata,
|
||||
},
|
||||
}
|
||||
|
||||
values := candleSeries.CandleValues()
|
||||
assert.NotEmpty(values)
|
||||
assert.Len(values, 43) // should be 60 days per the generator.
|
||||
}
|
||||
|
|
54
draw.go
54
draw.go
|
@ -168,6 +168,60 @@ func (d draw) HistogramSeries(r Renderer, canvasBox Box, xrange, yrange Range, s
|
|||
}
|
||||
}
|
||||
|
||||
func (d draw) CandlestickSeries(r Renderer, canvasBox Box, xrange, yrange Range, style Style, cs CandlestickSeries) {
|
||||
if cs.Len() == 0 {
|
||||
return
|
||||
}
|
||||
|
||||
candleValues := cs.CandleValues()
|
||||
|
||||
//calculate bar width?
|
||||
seriesLength := len(candleValues)
|
||||
barWidth := int(math.Floor(float64(xrange.GetDomain()) / float64(seriesLength)))
|
||||
|
||||
bw2 := barWidth >> 1
|
||||
|
||||
cb := canvasBox.Bottom
|
||||
cl := canvasBox.Left
|
||||
|
||||
var cv CandleValue
|
||||
for index := 0; index < seriesLength; index++ {
|
||||
cv = candleValues[index]
|
||||
|
||||
y0 := yrange.Translate(cv.Open)
|
||||
y1 := yrange.Translate(cv.Close)
|
||||
|
||||
x := cl + xrange.Translate(util.Time.ToFloat64(cv.Timestamp))
|
||||
|
||||
// draw open / close box.
|
||||
if cv.Open < cv.Close {
|
||||
d.Box(r, Box{
|
||||
Top: cb - y0,
|
||||
Left: x - bw2,
|
||||
Right: x + bw2,
|
||||
Bottom: cb - y1,
|
||||
}, style.InheritFrom(Style{FillColor: ColorAlternateGreen}))
|
||||
} else {
|
||||
d.Box(r, Box{
|
||||
Top: cb - y1,
|
||||
Left: x - bw2,
|
||||
Right: x + bw2,
|
||||
Bottom: cb - y0,
|
||||
}, style.InheritFrom(Style{FillColor: ColorRed}))
|
||||
}
|
||||
|
||||
// draw high / low t bars
|
||||
y0 = yrange.Translate(cv.High)
|
||||
y1 = yrange.Translate(cv.Low)
|
||||
|
||||
style.InheritFrom(Style{StrokeColor: DefaultStrokeColor}).WriteToRenderer(r)
|
||||
|
||||
r.MoveTo(x, cb-y0)
|
||||
r.LineTo(x, cb-y1)
|
||||
r.Stroke()
|
||||
}
|
||||
}
|
||||
|
||||
// MeasureAnnotation measures how big an annotation would be.
|
||||
func (d draw) MeasureAnnotation(r Renderer, canvasBox Box, style Style, lx, ly int, label string) Box {
|
||||
style.WriteToRenderer(r)
|
||||
|
|
16
util/time_test.go
Normal file
16
util/time_test.go
Normal file
|
@ -0,0 +1,16 @@
|
|||
package util
|
||||
|
||||
import (
|
||||
"testing"
|
||||
"time"
|
||||
|
||||
assert "github.com/blendlabs/go-assert"
|
||||
)
|
||||
|
||||
func TestTimeFromFloat64(t *testing.T) {
|
||||
assert := assert.New(t)
|
||||
|
||||
now := time.Now()
|
||||
|
||||
assert.InTimeDelta(now, Time.FromFloat64(Time.ToFloat64(now)), time.Microsecond)
|
||||
}
|
|
@ -5,7 +5,7 @@ import "github.com/wcharczuk/go-chart/drawing"
|
|||
// ValuesProvider is a type that produces values.
|
||||
type ValuesProvider interface {
|
||||
Len() int
|
||||
GetValues(index int) (float64, float64)
|
||||
GetValues(index int) (x float64, y float64)
|
||||
}
|
||||
|
||||
// BoundedValuesProvider allows series to return a range.
|
||||
|
|
Loading…
Reference in New Issue
Block a user