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tweaks to make ticks not be terrible

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This commit is contained in:
Will Charczuk 2016-07-31 16:54:09 -07:00
parent 7b5bb6e952
commit c3a066aecd
24 changed files with 480 additions and 271 deletions
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4
annotation_series.go
View file

@ -6,7 +6,7 @@ import "math"
type AnnotationSeries struct {
Name string
Style Style
YAxis yAxisType
YAxis YAxisType
Annotations []Value2
}
@ -21,7 +21,7 @@ func (as AnnotationSeries) GetStyle() Style {
}
// GetYAxis returns which YAxis the series draws on.
func (as AnnotationSeries) GetYAxis() yAxisType {
func (as AnnotationSeries) GetYAxis() YAxisType {
return as.YAxis
}

15
axis.go
View file

@ -1,24 +1,25 @@
package chart
type tickPosition int
// TickPosition is an enumeration of possible tick drawing positions.
type TickPosition int
const (
// TickPositionUnset means to use the default tick position.
TickPositionUnset tickPosition = 0
TickPositionUnset TickPosition = 0
// TickPositionBetweenTicks draws the labels for a tick between the previous and current tick.
TickPositionBetweenTicks tickPosition = 1
TickPositionBetweenTicks TickPosition = 1
// TickPositionUnderTick draws the tick below the tick.
TickPositionUnderTick tickPosition = 2
TickPositionUnderTick TickPosition = 2
)
// YAxisType is a type of y-axis; it can either be primary or secondary.
type yAxisType int
type YAxisType int
const (
// YAxisPrimary is the primary axis.
YAxisPrimary yAxisType = 0
YAxisPrimary YAxisType = 0
// YAxisSecondary is the secondary axis.
YAxisSecondary yAxisType = 1
YAxisSecondary YAxisType = 1
)
// Axis is a chart feature detailing what values happen where.

4
bollinger_band_series.go
View file

@ -7,7 +7,7 @@ import "math"
type BollingerBandsSeries struct {
Name string
Style Style
YAxis yAxisType
YAxis YAxisType
Period int
K float64
@ -27,7 +27,7 @@ func (bbs BollingerBandsSeries) GetStyle() Style {
}
// GetYAxis returns which YAxis the series draws on.
func (bbs BollingerBandsSeries) GetYAxis() yAxisType {
func (bbs BollingerBandsSeries) GetYAxis() YAxisType {
return bbs.YAxis
}

4
continuous_series.go
View file

@ -5,7 +5,7 @@ type ContinuousSeries struct {
Name string
Style Style
YAxis yAxisType
YAxis YAxisType
XValues []float64
YValues []float64
@ -44,7 +44,7 @@ func (cs ContinuousSeries) GetValueFormatters() (x, y ValueFormatter) {
}
// GetYAxis returns which YAxis the series draws on.
func (cs ContinuousSeries) GetYAxis() yAxisType {
func (cs ContinuousSeries) GetYAxis() YAxisType {
return cs.YAxis
}

155
date/util.go → date.go
View file

@ -1,4 +1,4 @@
package date
package chart
import (
"sync"
@ -52,33 +52,40 @@ var (
var (
// NYSEOpen is when the NYSE opens.
NYSEOpen = ClockTime(9, 30, 0, 0, Eastern())
NYSEOpen = Date.ClockTime(9, 30, 0, 0, Date.Eastern())
// NYSEClose is when the NYSE closes.
NYSEClose = ClockTime(16, 0, 0, 0, Eastern())
NYSEClose = Date.ClockTime(16, 0, 0, 0, Date.Eastern())
// NASDAQOpen is when NASDAQ opens.
NASDAQOpen = ClockTime(9, 30, 0, 0, Eastern())
NASDAQOpen = Date.ClockTime(9, 30, 0, 0, Date.Eastern())
// NASDAQClose is when NASDAQ closes.
NASDAQClose = ClockTime(16, 0, 0, 0, Eastern())
NASDAQClose = Date.ClockTime(16, 0, 0, 0, Date.Eastern())
// NYSEArcaOpen is when NYSEARCA opens.
NYSEArcaOpen = ClockTime(4, 0, 0, 0, Eastern())
NYSEArcaOpen = Date.ClockTime(4, 0, 0, 0, Date.Eastern())
// NYSEArcaClose is when NYSEARCA closes.
NYSEArcaClose = ClockTime(20, 0, 0, 0, Eastern())
NYSEArcaClose = Date.ClockTime(20, 0, 0, 0, Date.Eastern())
)
// HolidayProvider is a function that returns if a given time falls on a holiday.
type HolidayProvider func(time.Time) bool
// DefaultHolidayProvider implements `HolidayProvider` and just returns false.
func DefaultHolidayProvider(_ time.Time) bool { return false }
// defaultHolidayProvider implements `HolidayProvider` and just returns false.
func defaultHolidayProvider(_ time.Time) bool { return false }
var (
// Date contains utility functions that operate on dates.
Date = &date{}
)
type date struct{}
// IsNYSEHoliday returns if a date was/is on a nyse holiday day.
func IsNYSEHoliday(t time.Time) bool {
te := t.In(Eastern())
func (d date) IsNYSEHoliday(t time.Time) bool {
te := t.In(d.Eastern())
if te.Year() == 2013 {
if te.Month() == 1 {
return te.Day() == 1 || te.Day() == 21
@ -192,17 +199,17 @@ func IsNYSEHoliday(t time.Time) bool {
}
// IsNYSEArcaHoliday returns that returns if a given time falls on a holiday.
func IsNYSEArcaHoliday(t time.Time) bool {
return IsNYSEHoliday(t)
func (d date) IsNYSEArcaHoliday(t time.Time) bool {
return d.IsNYSEHoliday(t)
}
// IsNASDAQHoliday returns if a date was a NASDAQ holiday day.
func IsNASDAQHoliday(t time.Time) bool {
return IsNYSEHoliday(t)
func (d date) IsNASDAQHoliday(t time.Time) bool {
return d.IsNYSEHoliday(t)
}
// Eastern returns the eastern timezone.
func Eastern() *time.Location {
func (d date) Eastern() *time.Location {
if _eastern == nil {
_easternLock.Lock()
defer _easternLock.Unlock()
@ -214,32 +221,37 @@ func Eastern() *time.Location {
}
// ClockTime returns a new time.Time for the given clock components.
func ClockTime(hour, min, sec, nsec int, loc *time.Location) time.Time {
func (d date) ClockTime(hour, min, sec, nsec int, loc *time.Location) time.Time {
return time.Date(0, 0, 0, hour, min, sec, nsec, loc)
}
// On returns the clock components of clock (hour,minute,second) on the date components of d.
func On(clock, d time.Time) time.Time {
return time.Date(d.Year(), d.Month(), d.Day(), clock.Hour(), clock.Minute(), clock.Second(), clock.Nanosecond(), clock.Location())
func (d date) On(clock, cd time.Time) time.Time {
return time.Date(cd.Year(), cd.Month(), cd.Day(), clock.Hour(), clock.Minute(), clock.Second(), clock.Nanosecond(), clock.Location())
}
// NoonOn is a shortcut for On(ClockTime(12,0,0), cd) a.k.a. noon on a given date.
func (d date) NoonOn(cd time.Time) time.Time {
return time.Date(cd.Year(), cd.Month(), cd.Day(), 12, 0, 0, 0, cd.Location())
}
// Optional returns a pointer reference to a given time.
func Optional(t time.Time) *time.Time {
func (d date) Optional(t time.Time) *time.Time {
return &t
}
// IsWeekDay returns if the day is a monday->friday.
func IsWeekDay(day time.Weekday) bool {
return !IsWeekendDay(day)
func (d date) IsWeekDay(day time.Weekday) bool {
return !d.IsWeekendDay(day)
}
// IsWeekendDay returns if the day is a monday->friday.
func IsWeekendDay(day time.Weekday) bool {
func (d date) IsWeekendDay(day time.Weekday) bool {
return day == time.Saturday || day == time.Sunday
}
// BeforeDate returns if a timestamp is strictly before another date (ignoring hours, minutes etc.)
func BeforeDate(before, reference time.Time) bool {
// Before returns if a timestamp is strictly before another date (ignoring hours, minutes etc.)
func (d date) Before(before, reference time.Time) bool {
if before.Year() < reference.Year() {
return true
}
@ -250,41 +262,40 @@ func BeforeDate(before, reference time.Time) bool {
}
// NextMarketOpen returns the next market open after a given time.
func NextMarketOpen(after, openTime time.Time, isHoliday HolidayProvider) time.Time {
afterEastern := after.In(Eastern())
todaysOpen := On(openTime, afterEastern)
func (d date) NextMarketOpen(after, openTime time.Time, isHoliday HolidayProvider) time.Time {
afterEastern := after.In(d.Eastern())
todaysOpen := d.On(openTime, afterEastern)
if isHoliday == nil {
isHoliday = DefaultHolidayProvider
isHoliday = defaultHolidayProvider
}
if afterEastern.Before(todaysOpen) && IsWeekDay(todaysOpen.Weekday()) && !isHoliday(todaysOpen) {
todayIsValidTradingDay := d.IsWeekDay(todaysOpen.Weekday()) && !isHoliday(todaysOpen)
if (afterEastern.Equal(todaysOpen) || afterEastern.Before(todaysOpen)) && todayIsValidTradingDay {
return todaysOpen
}
if afterEastern.Equal(todaysOpen) { //rare but it might happen.
return todaysOpen
}
for cursorDay := 1; cursorDay < 6; cursorDay++ {
for cursorDay := 1; cursorDay < 7; cursorDay++ {
newDay := todaysOpen.AddDate(0, 0, cursorDay)
if IsWeekDay(newDay.Weekday()) && !isHoliday(afterEastern) {
return On(openTime, newDay)
isValidTradingDay := d.IsWeekDay(newDay.Weekday()) && !isHoliday(newDay)
if isValidTradingDay {
return d.On(openTime, newDay)
}
}
return Epoch //we should never reach this.
panic("Have exhausted day window looking for next market open.")
}
// NextMarketClose returns the next market close after a given time.
func NextMarketClose(after, closeTime time.Time, isHoliday HolidayProvider) time.Time {
afterEastern := after.In(Eastern())
func (d date) NextMarketClose(after, closeTime time.Time, isHoliday HolidayProvider) time.Time {
afterEastern := after.In(d.Eastern())
if isHoliday == nil {
isHoliday = DefaultHolidayProvider
isHoliday = defaultHolidayProvider
}
todaysClose := On(closeTime, afterEastern)
if afterEastern.Before(todaysClose) && IsWeekDay(todaysClose.Weekday()) && !isHoliday(todaysClose) {
todaysClose := d.On(closeTime, afterEastern)
if afterEastern.Before(todaysClose) && d.IsWeekDay(todaysClose.Weekday()) && !isHoliday(todaysClose) {
return todaysClose
}
@ -294,22 +305,22 @@ func NextMarketClose(after, closeTime time.Time, isHoliday HolidayProvider) time
for cursorDay := 1; cursorDay < 6; cursorDay++ {
newDay := todaysClose.AddDate(0, 0, cursorDay)
if IsWeekDay(newDay.Weekday()) && !isHoliday(newDay) {
return On(closeTime, newDay)
if d.IsWeekDay(newDay.Weekday()) && !isHoliday(newDay) {
return d.On(closeTime, newDay)
}
}
return Epoch //we should never reach this.
panic("Have exhausted day window looking for next market close.")
}
// CalculateMarketSecondsBetween calculates the number of seconds the market was open between two dates.
func CalculateMarketSecondsBetween(start, end, marketOpen, marketClose time.Time, isHoliday HolidayProvider) (seconds int64) {
startEastern := start.In(Eastern())
endEastern := end.In(Eastern())
func (d date) CalculateMarketSecondsBetween(start, end, marketOpen, marketClose time.Time, isHoliday HolidayProvider) (seconds int64) {
startEastern := start.In(d.Eastern())
endEastern := end.In(d.Eastern())
startMarketOpen := On(marketOpen, startEastern)
startMarketClose := On(marketClose, startEastern)
startMarketOpen := d.On(marketOpen, startEastern)
startMarketClose := d.On(marketClose, startEastern)
if !IsWeekendDay(startMarketOpen.Weekday()) && !isHoliday(startMarketOpen) {
if !d.IsWeekendDay(startMarketOpen.Weekday()) && !isHoliday(startMarketOpen) {
if (startEastern.Equal(startMarketOpen) || startEastern.After(startMarketOpen)) && startEastern.Before(startMarketClose) {
if endEastern.Before(startMarketClose) {
seconds += int64(endEastern.Sub(startEastern) / time.Second)
@ -319,17 +330,17 @@ func CalculateMarketSecondsBetween(start, end, marketOpen, marketClose time.Time
}
}
cursor := NextMarketOpen(startMarketClose, marketOpen, isHoliday)
for BeforeDate(cursor, endEastern) {
if IsWeekDay(cursor.Weekday()) && !isHoliday(cursor) {
close := NextMarketClose(cursor, marketClose, isHoliday)
cursor := d.NextMarketOpen(startMarketClose, marketOpen, isHoliday)
for d.Before(cursor, endEastern) {
if d.IsWeekDay(cursor.Weekday()) && !isHoliday(cursor) {
close := d.NextMarketClose(cursor, marketClose, isHoliday)
seconds += int64(close.Sub(cursor) / time.Second)
}
cursor = cursor.AddDate(0, 0, 1)
}
finalMarketOpen := NextMarketOpen(cursor, marketOpen, isHoliday)
finalMarketClose := NextMarketClose(cursor, marketClose, isHoliday)
finalMarketOpen := d.NextMarketOpen(cursor, marketOpen, isHoliday)
finalMarketClose := d.NextMarketClose(cursor, marketClose, isHoliday)
if endEastern.After(finalMarketOpen) {
if endEastern.Before(finalMarketClose) {
seconds += int64(endEastern.Sub(finalMarketOpen) / time.Second)
@ -341,13 +352,27 @@ func CalculateMarketSecondsBetween(start, end, marketOpen, marketClose time.Time
return
}
// Format returns a string representation of a date.
func format(t time.Time) string {
return t.Format("2006-01-02")
const (
_secondsPerDay = 60 * 60 * 24
)
func (d date) Diff(t1, t2 time.Time) (days int64) {
t1n := t1.Unix()
t2n := t2.Unix()
diff := t1n - t2n
return diff / (_secondsPerDay)
}
// Parse parses a date from a string.
func parse(str string) time.Time {
res, _ := time.Parse("2006-01-02", str)
return res
// NextDay returns the timestamp advanced a day.
func (d date) NextDay(ts time.Time) time.Time {
return ts.AddDate(0, 0, 1)
}
// NextHour returns the next timestamp on the hour.
func (d date) NextHour(ts time.Time) time.Time {
//advance a full hour ...
advanced := ts.Add(time.Hour)
minutes := time.Duration(advanced.Minute()) * time.Minute
final := advanced.Add(-minutes)
return time.Date(final.Year(), final.Month(), final.Day(), final.Hour(), 0, 0, 0, final.Location())
}

98
date/util_test.go
View file

@ -1,98 +0,0 @@
package date
import (
"testing"
"time"
assert "github.com/blendlabs/go-assert"
)
func TestBeforeDate(t *testing.T) {
assert := assert.New(t)
assert.True(BeforeDate(parse("2015-07-02"), parse("2016-07-01")))
assert.True(BeforeDate(parse("2016-06-01"), parse("2016-07-01")))
assert.True(BeforeDate(parse("2016-07-01"), parse("2016-07-02")))
assert.False(BeforeDate(parse("2016-07-01"), parse("2016-07-01")))
assert.False(BeforeDate(parse("2016-07-03"), parse("2016-07-01")))
assert.False(BeforeDate(parse("2016-08-03"), parse("2016-07-01")))
assert.False(BeforeDate(parse("2017-08-03"), parse("2016-07-01")))
}
func TestNextMarketOpen(t *testing.T) {
assert := assert.New(t)
beforeOpen := time.Date(2016, 07, 18, 9, 0, 0, 0, Eastern())
todayOpen := time.Date(2016, 07, 18, 9, 30, 0, 0, Eastern())
afterOpen := time.Date(2016, 07, 18, 9, 31, 0, 0, Eastern())
tomorrowOpen := time.Date(2016, 07, 19, 9, 30, 0, 0, Eastern())
afterFriday := time.Date(2016, 07, 22, 9, 31, 0, 0, Eastern())
mondayOpen := time.Date(2016, 07, 25, 9, 30, 0, 0, Eastern())
weekend := time.Date(2016, 07, 23, 9, 31, 0, 0, Eastern())
assert.True(todayOpen.Equal(NextMarketOpen(beforeOpen, NYSEOpen, IsNYSEHoliday)))
assert.True(tomorrowOpen.Equal(NextMarketOpen(afterOpen, NYSEOpen, IsNYSEHoliday)))
assert.True(mondayOpen.Equal(NextMarketOpen(afterFriday, NYSEOpen, IsNYSEHoliday)))
assert.True(mondayOpen.Equal(NextMarketOpen(weekend, NYSEOpen, IsNYSEHoliday)))
testRegression := time.Date(2016, 07, 18, 16, 0, 0, 0, Eastern())
shouldbe := time.Date(2016, 07, 19, 9, 30, 0, 0, Eastern())
assert.True(shouldbe.Equal(NextMarketOpen(testRegression, NYSEOpen, IsNYSEHoliday)))
}
func TestNextMarketClose(t *testing.T) {
assert := assert.New(t)
beforeClose := time.Date(2016, 07, 18, 15, 0, 0, 0, Eastern())
todayClose := time.Date(2016, 07, 18, 16, 00, 0, 0, Eastern())
afterClose := time.Date(2016, 07, 18, 16, 1, 0, 0, Eastern())
tomorrowClose := time.Date(2016, 07, 19, 16, 00, 0, 0, Eastern())
afterFriday := time.Date(2016, 07, 22, 16, 1, 0, 0, Eastern())
mondayClose := time.Date(2016, 07, 25, 16, 0, 0, 0, Eastern())
weekend := time.Date(2016, 07, 23, 9, 31, 0, 0, Eastern())
assert.True(todayClose.Equal(NextMarketClose(beforeClose, NYSEClose, IsNYSEHoliday)))
assert.True(tomorrowClose.Equal(NextMarketClose(afterClose, NYSEClose, IsNYSEHoliday)))
assert.True(mondayClose.Equal(NextMarketClose(afterFriday, NYSEClose, IsNYSEHoliday)))
assert.True(mondayClose.Equal(NextMarketClose(weekend, NYSEClose, IsNYSEHoliday)))
}
func TestCalculateMarketSecondsBetween(t *testing.T) {
assert := assert.New(t)
start := time.Date(2016, 07, 18, 9, 30, 0, 0, Eastern())
end := time.Date(2016, 07, 22, 16, 00, 0, 0, Eastern())
shouldbe := 5 * 6.5 * 60 * 60
assert.Equal(shouldbe, CalculateMarketSecondsBetween(start, end, NYSEOpen, NYSEClose, IsNYSEHoliday))
}
func TestCalculateMarketSecondsBetween1D(t *testing.T) {
assert := assert.New(t)
start := time.Date(2016, 07, 22, 9, 45, 0, 0, Eastern())
end := time.Date(2016, 07, 22, 15, 45, 0, 0, Eastern())
shouldbe := 6 * 60 * 60
assert.Equal(shouldbe, CalculateMarketSecondsBetween(start, end, NYSEOpen, NYSEClose, IsNYSEHoliday))
}
func TestCalculateMarketSecondsBetweenLTM(t *testing.T) {
assert := assert.New(t)
start := time.Date(2015, 07, 01, 9, 30, 0, 0, Eastern())
end := time.Date(2016, 07, 01, 9, 30, 0, 0, Eastern())
shouldbe := 253 * 6.5 * 60 * 60 //253 full market days since this date last year.
assert.Equal(shouldbe, CalculateMarketSecondsBetween(start, end, NYSEOpen, NYSEClose, IsNYSEHoliday))
}

122
date_test.go Normal file
View file

@ -0,0 +1,122 @@
package chart
import (
"testing"
"time"
assert "github.com/blendlabs/go-assert"
)
func parse(v string) time.Time {
ts, _ := time.Parse("2006-01-02", v)
return ts
}
func TestDateBefore(t *testing.T) {
assert := assert.New(t)
assert.True(Date.Before(parse("2015-07-02"), parse("2016-07-01")))
assert.True(Date.Before(parse("2016-06-01"), parse("2016-07-01")))
assert.True(Date.Before(parse("2016-07-01"), parse("2016-07-02")))
assert.False(Date.Before(parse("2016-07-01"), parse("2016-07-01")))
assert.False(Date.Before(parse("2016-07-03"), parse("2016-07-01")))
assert.False(Date.Before(parse("2016-08-03"), parse("2016-07-01")))
assert.False(Date.Before(parse("2017-08-03"), parse("2016-07-01")))
}
func TestNextMarketOpen(t *testing.T) {
assert := assert.New(t)
beforeOpen := time.Date(2016, 07, 18, 9, 0, 0, 0, Date.Eastern())
todayOpen := time.Date(2016, 07, 18, 9, 30, 0, 0, Date.Eastern())
afterOpen := time.Date(2016, 07, 18, 9, 31, 0, 0, Date.Eastern())
tomorrowOpen := time.Date(2016, 07, 19, 9, 30, 0, 0, Date.Eastern())
afterFriday := time.Date(2016, 07, 22, 9, 31, 0, 0, Date.Eastern())
mondayOpen := time.Date(2016, 07, 25, 9, 30, 0, 0, Date.Eastern())
weekend := time.Date(2016, 07, 23, 9, 31, 0, 0, Date.Eastern())
assert.True(todayOpen.Equal(Date.NextMarketOpen(beforeOpen, NYSEOpen, Date.IsNYSEHoliday)))
assert.True(tomorrowOpen.Equal(Date.NextMarketOpen(afterOpen, NYSEOpen, Date.IsNYSEHoliday)))
assert.True(mondayOpen.Equal(Date.NextMarketOpen(afterFriday, NYSEOpen, Date.IsNYSEHoliday)))
assert.True(mondayOpen.Equal(Date.NextMarketOpen(weekend, NYSEOpen, Date.IsNYSEHoliday)))
testRegression := time.Date(2016, 07, 18, 16, 0, 0, 0, Date.Eastern())
shouldbe := time.Date(2016, 07, 19, 9, 30, 0, 0, Date.Eastern())
assert.True(shouldbe.Equal(Date.NextMarketOpen(testRegression, NYSEOpen, Date.IsNYSEHoliday)))
}
func TestNextMarketClose(t *testing.T) {
assert := assert.New(t)
beforeClose := time.Date(2016, 07, 18, 15, 0, 0, 0, Date.Eastern())
todayClose := time.Date(2016, 07, 18, 16, 00, 0, 0, Date.Eastern())
afterClose := time.Date(2016, 07, 18, 16, 1, 0, 0, Date.Eastern())
tomorrowClose := time.Date(2016, 07, 19, 16, 00, 0, 0, Date.Eastern())
afterFriday := time.Date(2016, 07, 22, 16, 1, 0, 0, Date.Eastern())
mondayClose := time.Date(2016, 07, 25, 16, 0, 0, 0, Date.Eastern())
weekend := time.Date(2016, 07, 23, 9, 31, 0, 0, Date.Eastern())
assert.True(todayClose.Equal(Date.NextMarketClose(beforeClose, NYSEClose, Date.IsNYSEHoliday)))
assert.True(tomorrowClose.Equal(Date.NextMarketClose(afterClose, NYSEClose, Date.IsNYSEHoliday)))
assert.True(mondayClose.Equal(Date.NextMarketClose(afterFriday, NYSEClose, Date.IsNYSEHoliday)))
assert.True(mondayClose.Equal(Date.NextMarketClose(weekend, NYSEClose, Date.IsNYSEHoliday)))
}
func TestCalculateMarketSecondsBetween(t *testing.T) {
assert := assert.New(t)
start := time.Date(2016, 07, 18, 9, 30, 0, 0, Date.Eastern())
end := time.Date(2016, 07, 22, 16, 00, 0, 0, Date.Eastern())
shouldbe := 5 * 6.5 * 60 * 60
assert.Equal(shouldbe, Date.CalculateMarketSecondsBetween(start, end, NYSEOpen, NYSEClose, Date.IsNYSEHoliday))
}
func TestCalculateMarketSecondsBetween1D(t *testing.T) {
assert := assert.New(t)
start := time.Date(2016, 07, 22, 9, 45, 0, 0, Date.Eastern())
end := time.Date(2016, 07, 22, 15, 45, 0, 0, Date.Eastern())
shouldbe := 6 * 60 * 60
assert.Equal(shouldbe, Date.CalculateMarketSecondsBetween(start, end, NYSEOpen, NYSEClose, Date.IsNYSEHoliday))
}
func TestCalculateMarketSecondsBetweenLTM(t *testing.T) {
assert := assert.New(t)
start := time.Date(2015, 07, 01, 9, 30, 0, 0, Date.Eastern())
end := time.Date(2016, 07, 01, 9, 30, 0, 0, Date.Eastern())
shouldbe := 253 * 6.5 * 60 * 60 //253 full market days since this date last year.
assert.Equal(shouldbe, Date.CalculateMarketSecondsBetween(start, end, NYSEOpen, NYSEClose, Date.IsNYSEHoliday))
}
func TestDateNextHour(t *testing.T) {
assert := assert.New(t)
start := time.Date(2015, 07, 01, 9, 30, 0, 0, Date.Eastern())
next := Date.NextHour(start)
assert.Equal(2015, next.Year())
assert.Equal(07, next.Month())
assert.Equal(01, next.Day())
assert.Equal(10, next.Hour())
assert.Equal(00, next.Minute())
next = Date.NextHour(next)
assert.Equal(11, next.Hour())
next = Date.NextHour(next)
assert.Equal(12, next.Hour())
}

4
ema_series.go
View file

@ -9,7 +9,7 @@ const (
type EMASeries struct {
Name string
Style Style
YAxis yAxisType
YAxis YAxisType
Period int
InnerSeries ValueProvider
@ -28,7 +28,7 @@ func (ema EMASeries) GetStyle() Style {
}
// GetYAxis returns which YAxis the series draws on.
func (ema EMASeries) GetYAxis() yAxisType {
func (ema EMASeries) GetYAxis() YAxisType {
return ema.YAxis
}

45
examples/market_hours/main.go Normal file
View file

@ -0,0 +1,45 @@
package main
import (
"net/http"
"time"
"github.com/wcharczuk/go-chart"
)
func drawChart(res http.ResponseWriter, req *http.Request) {
start := time.Date(2016, 07, 04, 12, 0, 0, 0, chart.Date.Eastern())
end := time.Date(2016, 07, 06, 12, 0, 0, 0, chart.Date.Eastern())
xv := chart.Sequence.MarketHours(start, end, chart.NYSEOpen, chart.NYSEClose, chart.Date.IsNYSEHoliday)
yv := chart.Sequence.RandomWithAverage(len(xv), 200, 10)
graph := chart.Chart{
XAxis: chart.XAxis{
Style: chart.StyleShow(),
TickPosition: chart.TickPositionBetweenTicks,
ValueFormatter: chart.TimeHourValueFormatter,
Range: &chart.MarketHoursRange{
MarketOpen: chart.NYSEOpen,
MarketClose: chart.NYSEClose,
HolidayProvider: chart.Date.IsNYSEHoliday,
},
},
YAxis: chart.YAxis{
Style: chart.StyleShow(),
},
Series: []chart.Series{
chart.TimeSeries{
XValues: xv,
YValues: yv,
},
},
}
res.Header().Set("Content-Type", "image/png")
graph.Render(chart.PNG, res)
}
func main() {
http.HandleFunc("/", drawChart)
http.ListenAndServe(":8080", nil)
}

4
histogram_series.go
View file

@ -6,7 +6,7 @@ package chart
type HistogramSeries struct {
Name string
Style Style
YAxis yAxisType
YAxis YAxisType
InnerSeries ValueProvider
}
@ -21,7 +21,7 @@ func (hs HistogramSeries) GetStyle() Style {
}
// GetYAxis returns which yaxis the series is mapped to.
func (hs HistogramSeries) GetYAxis() yAxisType {
func (hs HistogramSeries) GetYAxis() YAxisType {
return hs.YAxis
}

4
linear_regression_series.go
View file

@ -5,7 +5,7 @@ package chart
type LinearRegressionSeries struct {
Name string
Style Style
YAxis yAxisType
YAxis YAxisType
Window int
Offset int
@ -28,7 +28,7 @@ func (lrs LinearRegressionSeries) GetStyle() Style {
}
// GetYAxis returns which YAxis the series draws on.
func (lrs LinearRegressionSeries) GetYAxis() yAxisType {
func (lrs LinearRegressionSeries) GetYAxis() YAxisType {
return lrs.YAxis
}

12
macd_series.go
View file

@ -14,7 +14,7 @@ const (
type MACDSeries struct {
Name string
Style Style
YAxis yAxisType
YAxis YAxisType
InnerSeries ValueProvider
PrimaryPeriod int
@ -56,7 +56,7 @@ func (macd MACDSeries) GetStyle() Style {
}
// GetYAxis returns which YAxis the series draws on.
func (macd MACDSeries) GetYAxis() yAxisType {
func (macd MACDSeries) GetYAxis() YAxisType {
return macd.YAxis
}
@ -109,7 +109,7 @@ func (macd *MACDSeries) ensureChildSeries() {
type MACDSignalSeries struct {
Name string
Style Style
YAxis yAxisType
YAxis YAxisType
InnerSeries ValueProvider
PrimaryPeriod int
@ -150,7 +150,7 @@ func (macds MACDSignalSeries) GetStyle() Style {
}
// GetYAxis returns which YAxis the series draws on.
func (macds MACDSignalSeries) GetYAxis() yAxisType {
func (macds MACDSignalSeries) GetYAxis() YAxisType {
return macds.YAxis
}
@ -200,7 +200,7 @@ func (macds *MACDSignalSeries) Render(r Renderer, canvasBox Box, xrange, yrange
type MACDLineSeries struct {
Name string
Style Style
YAxis yAxisType
YAxis YAxisType
InnerSeries ValueProvider
PrimaryPeriod int
@ -223,7 +223,7 @@ func (macdl MACDLineSeries) GetStyle() Style {
}
// GetYAxis returns which YAxis the series draws on.
func (macdl MACDLineSeries) GetYAxis() yAxisType {
func (macdl MACDLineSeries) GetYAxis() YAxisType {
return macdl.YAxis
}

84
market_hours_range.go
View file

@ -3,8 +3,6 @@ package chart
import (
"fmt"
"time"
"github.com/wcharczuk/go-chart/date"
)
// MarketHoursRange is a special type of range that compresses a time range into just the
@ -16,7 +14,7 @@ type MarketHoursRange struct {
MarketOpen time.Time
MarketClose time.Time
HolidayProvider date.HolidayProvider
HolidayProvider HolidayProvider
ValueFormatter ValueFormatter
@ -40,7 +38,7 @@ func (mhr MarketHoursRange) GetMax() float64 {
// GetEffectiveMax gets either the close on the max, or the max itself.
func (mhr MarketHoursRange) GetEffectiveMax() time.Time {
maxClose := date.On(mhr.MarketClose, mhr.Max)
maxClose := Date.On(mhr.MarketClose, mhr.Max)
if maxClose.After(mhr.Max) {
return maxClose
}
@ -75,40 +73,70 @@ func (mhr *MarketHoursRange) SetDomain(domain int) {
}
// GetHolidayProvider coalesces a userprovided holiday provider and the date.DefaultHolidayProvider.
func (mhr MarketHoursRange) GetHolidayProvider() date.HolidayProvider {
func (mhr MarketHoursRange) GetHolidayProvider() HolidayProvider {
if mhr.HolidayProvider == nil {
return date.DefaultHolidayProvider
return defaultHolidayProvider
}
return mhr.HolidayProvider
}
// GetMarketOpen returns the market open time.
func (mhr MarketHoursRange) GetMarketOpen() time.Time {
if mhr.MarketOpen.IsZero() {
return NYSEOpen
}
return mhr.MarketOpen
}
// GetMarketClose returns the market close time.
func (mhr MarketHoursRange) GetMarketClose() time.Time {
if mhr.MarketClose.IsZero() {
return NYSEClose
}
return mhr.MarketClose
}
// GetTicks returns the ticks for the range.
// This is to override the default continous ticks that would be generated for the range.
func (mhr *MarketHoursRange) GetTicks(vf ValueFormatter) []Tick {
var ticks []Tick
func (mhr *MarketHoursRange) GetTicks(r Renderer, defaults Style, vf ValueFormatter) []Tick {
println("GetTicks() domain:", mhr.Domain)
times := Sequence.MarketHours(mhr.Min, mhr.Max, mhr.GetMarketOpen(), mhr.GetMarketClose(), mhr.GetHolidayProvider())
timesWidth := mhr.measureTimes(r, defaults, vf, times)
if timesWidth <= mhr.Domain {
return mhr.makeTicks(vf, times)
}
times = Sequence.MarketHourQuarters(mhr.Min, mhr.Max, mhr.GetMarketOpen(), mhr.GetMarketClose(), mhr.GetHolidayProvider())
timesWidth = mhr.measureTimes(r, defaults, vf, times)
if timesWidth <= mhr.Domain {
return mhr.makeTicks(vf, times)
}
return mhr.makeTicks(vf, Sequence.MarketDayCloses(mhr.Min, mhr.Max, mhr.GetMarketOpen(), mhr.GetMarketClose(), mhr.GetHolidayProvider()))
}
cursor := date.On(mhr.MarketClose, mhr.Min)
maxClose := date.On(mhr.MarketClose, mhr.Max)
func (mhr *MarketHoursRange) measureTimes(r Renderer, defaults Style, vf ValueFormatter, times []time.Time) int {
defaults.GetTextOptions().WriteToRenderer(r)
var total int
for index, t := range times {
timeLabel := vf(t)
for date.BeforeDate(cursor, maxClose) {
if date.IsWeekDay(cursor.Weekday()) && !mhr.GetHolidayProvider()(cursor) {
ticks = append(ticks, Tick{
Value: TimeToFloat64(cursor),
Label: vf(cursor),
})
labelBox := r.MeasureText(timeLabel)
total += labelBox.Width()
if index > 0 {
total += DefaultMinimumTickHorizontalSpacing
}
cursor = cursor.AddDate(0, 0, 1)
}
return total
}
endMarketClose := date.On(mhr.MarketClose, cursor)
if date.IsWeekDay(endMarketClose.Weekday()) && !mhr.GetHolidayProvider()(endMarketClose) {
ticks = append(ticks, Tick{
Value: TimeToFloat64(endMarketClose),
Label: vf(endMarketClose),
})
func (mhr *MarketHoursRange) makeTicks(vf ValueFormatter, times []time.Time) []Tick {
ticks := make([]Tick, len(times))
for index, t := range times {
ticks[index] = Tick{
Value: TimeToFloat64(t),
Label: vf(t),
}
println("make tick =>", vf(t))
}
return ticks
}
@ -119,9 +147,9 @@ func (mhr MarketHoursRange) String() string {
// Translate maps a given value into the ContinuousRange space.
func (mhr MarketHoursRange) Translate(value float64) int {
valueTime := Float64ToTime(value)
valueTimeEastern := valueTime.In(date.Eastern())
totalSeconds := date.CalculateMarketSecondsBetween(mhr.Min, mhr.GetEffectiveMax(), mhr.MarketOpen, mhr.MarketClose, mhr.HolidayProvider)
valueDelta := date.CalculateMarketSecondsBetween(mhr.Min, valueTimeEastern, mhr.MarketOpen, mhr.MarketClose, mhr.HolidayProvider)
valueTimeEastern := valueTime.In(Date.Eastern())
totalSeconds := Date.CalculateMarketSecondsBetween(mhr.Min, mhr.GetEffectiveMax(), mhr.GetMarketOpen(), mhr.GetMarketClose(), mhr.HolidayProvider)
valueDelta := Date.CalculateMarketSecondsBetween(mhr.Min, valueTimeEastern, mhr.GetMarketOpen(), mhr.GetMarketClose(), mhr.HolidayProvider)
translated := int((float64(valueDelta) / float64(totalSeconds)) * float64(mhr.Domain))
return translated
}

35
market_hours_range_test.go
View file

@ -5,18 +5,17 @@ import (
"time"
assert "github.com/blendlabs/go-assert"
"github.com/wcharczuk/go-chart/date"
)
func TestMarketHoursRangeGetDelta(t *testing.T) {
assert := assert.New(t)
r := &MarketHoursRange{
Min: time.Date(2016, 07, 19, 9, 30, 0, 0, date.Eastern()),
Max: time.Date(2016, 07, 22, 16, 00, 0, 0, date.Eastern()),
MarketOpen: date.NYSEOpen,
MarketClose: date.NYSEClose,
HolidayProvider: date.IsNYSEHoliday,
Min: time.Date(2016, 07, 19, 9, 30, 0, 0, Date.Eastern()),
Max: time.Date(2016, 07, 22, 16, 00, 0, 0, Date.Eastern()),
MarketOpen: NYSEOpen,
MarketClose: NYSEClose,
HolidayProvider: Date.IsNYSEHoliday,
}
assert.NotZero(r.GetDelta())
@ -26,15 +25,15 @@ func TestMarketHoursRangeTranslate(t *testing.T) {
assert := assert.New(t)
r := &MarketHoursRange{
Min: time.Date(2016, 07, 18, 9, 30, 0, 0, date.Eastern()),
Max: time.Date(2016, 07, 22, 16, 00, 0, 0, date.Eastern()),
MarketOpen: date.NYSEOpen,
MarketClose: date.NYSEClose,
HolidayProvider: date.IsNYSEHoliday,
Min: time.Date(2016, 07, 18, 9, 30, 0, 0, Date.Eastern()),
Max: time.Date(2016, 07, 22, 16, 00, 0, 0, Date.Eastern()),
MarketOpen: NYSEOpen,
MarketClose: NYSEClose,
HolidayProvider: Date.IsNYSEHoliday,
Domain: 1000,
}
weds := time.Date(2016, 07, 20, 9, 30, 0, 0, date.Eastern())
weds := time.Date(2016, 07, 20, 9, 30, 0, 0, Date.Eastern())
assert.Equal(0, r.Translate(TimeToFloat64(r.Min)))
assert.Equal(400, r.Translate(TimeToFloat64(weds)))
@ -45,17 +44,17 @@ func TestMarketHoursRangeGetTicks(t *testing.T) {
assert := assert.New(t)
r := &MarketHoursRange{
Min: time.Date(2016, 07, 18, 9, 30, 0, 0, date.Eastern()),
Max: time.Date(2016, 07, 22, 16, 00, 0, 0, date.Eastern()),
MarketOpen: date.NYSEOpen,
MarketClose: date.NYSEClose,
HolidayProvider: date.IsNYSEHoliday,
Min: time.Date(2016, 07, 18, 9, 30, 0, 0, Date.Eastern()),
Max: time.Date(2016, 07, 22, 16, 00, 0, 0, Date.Eastern()),
MarketOpen: NYSEOpen,
MarketClose: NYSEClose,
HolidayProvider: Date.IsNYSEHoliday,
Domain: 1000,
}
ticks := r.GetTicks(TimeValueFormatter)
assert.NotEmpty(ticks)
assert.Len(ticks, 5)
assert.Len(ticks, 24)
assert.NotEqual(TimeToFloat64(r.Min), ticks[0].Value)
assert.NotEmpty(ticks[0].Label)
}

71
sequence.go
View file

@ -45,6 +45,19 @@ func (s sequence) Random(samples int, scale float64) []float64 {
return values
}
// Random generates a fixed length sequence of random values with a given average, above and below that average by (-scale, scale)
func (s sequence) RandomWithAverage(samples int, average, scale float64) []float64 {
rnd := rand.New(rand.NewSource(time.Now().Unix()))
values := make([]float64, samples)
for x := 0; x < samples; x++ {
jitter := scale - (rnd.Float64() * (2 * scale))
values[x] = average + jitter
}
return values
}
// Days generates a sequence of timestamps by day, from -days to today.
func (s sequence) Days(days int) []time.Time {
var values []time.Time
@ -53,3 +66,61 @@ func (s sequence) Days(days int) []time.Time {
}
return values
}
func (s sequence) MarketHours(from, to time.Time, marketOpen, marketClose time.Time, isHoliday HolidayProvider) []time.Time {
var times []time.Time
cursor := Date.On(marketOpen, from)
toClose := Date.On(marketClose, to)
for cursor.Before(toClose) || cursor.Equal(toClose) {
todayOpen := Date.On(marketOpen, cursor)
todayClose := Date.On(marketClose, cursor)
isValidTradingDay := !isHoliday(cursor) && Date.IsWeekDay(cursor.Weekday())
if (cursor.Equal(todayOpen) || cursor.After(todayOpen)) && (cursor.Equal(todayClose) || cursor.Before(todayClose)) && isValidTradingDay {
times = append(times, cursor)
}
if cursor.After(todayClose) {
cursor = Date.NextMarketOpen(cursor, marketOpen, isHoliday)
} else {
cursor = Date.NextHour(cursor)
}
}
return times
}
func (s sequence) MarketHourQuarters(from, to time.Time, marketOpen, marketClose time.Time, isHoliday HolidayProvider) []time.Time {
var times []time.Time
cursor := Date.On(marketOpen, from)
toClose := Date.On(marketClose, to)
for cursor.Before(toClose) || cursor.Equal(toClose) {
isValidTradingDay := !isHoliday(cursor) && Date.IsWeekDay(cursor.Weekday())
if isValidTradingDay {
todayOpen := Date.On(marketOpen, cursor)
todayNoon := Date.NoonOn(cursor)
today2pm := Date.On(Date.ClockTime(2, 0, 0, 0, cursor.Location()), cursor)
todayClose := Date.On(marketClose, cursor)
times = append(times, todayOpen, todayNoon, today2pm, todayClose)
}
cursor = Date.NextDay(cursor)
}
return times
}
func (s sequence) MarketDayCloses(from, to time.Time, marketOpen, marketClose time.Time, isHoliday HolidayProvider) []time.Time {
var times []time.Time
cursor := Date.On(marketOpen, from)
toClose := Date.On(marketClose, to)
for cursor.Before(toClose) || cursor.Equal(toClose) {
isValidTradingDay := !isHoliday(cursor) && Date.IsWeekDay(cursor.Weekday())
if isValidTradingDay {
todayClose := Date.On(marketClose, cursor)
times = append(times, todayClose)
}
cursor = Date.NextDay(cursor)
}
return times
}

9
sequence_test.go
View file

@ -2,6 +2,7 @@ package chart
import (
"testing"
"time"
assert "github.com/blendlabs/go-assert"
)
@ -15,3 +16,11 @@ func TestSequenceFloat64(t *testing.T) {
desc := Sequence.Float64(10.0, 1.0)
assert.Len(desc, 10)
}
func TestSequenceMarketHours(t *testing.T) {
assert := assert.New(t)
today := time.Date(2016, 07, 01, 12, 0, 0, 0, Date.Eastern())
mh := Sequence.MarketHours(today, today, NYSEOpen, NYSEClose, Date.IsNYSEHoliday)
assert.Len(mh, 7)
}

2
series.go
View file

@ -3,7 +3,7 @@ package chart
// Series is an alias to Renderable.
type Series interface {
GetName() string
GetYAxis() yAxisType
GetYAxis() YAxisType
GetStyle() Style
Render(r Renderer, canvasBox Box, xrange, yrange Range, s Style)
}

4
sma_series.go
View file

@ -9,7 +9,7 @@ const (
type SMASeries struct {
Name string
Style Style
YAxis yAxisType
YAxis YAxisType
Period int
InnerSeries ValueProvider
@ -26,7 +26,7 @@ func (sma SMASeries) GetStyle() Style {
}
// GetYAxis returns which YAxis the series draws on.
func (sma SMASeries) GetYAxis() yAxisType {
func (sma SMASeries) GetYAxis() YAxisType {
return sma.YAxis
}

19
style.go
View file

@ -8,6 +8,13 @@ import (
"github.com/wcharczuk/go-chart/drawing"
)
// StyleShow is a prebuilt style with the `Show` property set to true.
func StyleShow() Style {
return Style{
Show: true,
}
}
// Style is a simple style set.
type Style struct {
Show bool
@ -22,9 +29,9 @@ type Style struct {
FontColor drawing.Color
Font *truetype.Font
TextHorizontalAlign textHorizontalAlign
TextVerticalAlign textVerticalAlign
TextWrap textWrap
TextHorizontalAlign TextHorizontalAlign
TextVerticalAlign TextVerticalAlign
TextWrap TextWrap
TextLineSpacing int
}
@ -191,7 +198,7 @@ func (s Style) GetPadding(defaults ...Box) Box {
}
// GetTextHorizontalAlign returns the horizontal alignment.
func (s Style) GetTextHorizontalAlign(defaults ...textHorizontalAlign) textHorizontalAlign {
func (s Style) GetTextHorizontalAlign(defaults ...TextHorizontalAlign) TextHorizontalAlign {
if s.TextHorizontalAlign == TextHorizontalAlignUnset {
if len(defaults) > 0 {
return defaults[0]
@ -202,7 +209,7 @@ func (s Style) GetTextHorizontalAlign(defaults ...textHorizontalAlign) textHoriz
}
// GetTextVerticalAlign returns the vertical alignment.
func (s Style) GetTextVerticalAlign(defaults ...textVerticalAlign) textVerticalAlign {
func (s Style) GetTextVerticalAlign(defaults ...TextVerticalAlign) TextVerticalAlign {
if s.TextVerticalAlign == TextVerticalAlignUnset {
if len(defaults) > 0 {
return defaults[0]
@ -213,7 +220,7 @@ func (s Style) GetTextVerticalAlign(defaults ...textVerticalAlign) textVerticalA
}
// GetTextWrap returns the word wrap.
func (s Style) GetTextWrap(defaults ...textWrap) textWrap {
func (s Style) GetTextWrap(defaults ...TextWrap) TextWrap {
if s.TextWrap == TextWrapUnset {
if len(defaults) > 0 {
return defaults[0]

40
text.go
View file

@ -3,51 +3,51 @@ package chart
import "strings"
// TextHorizontalAlign is an enum for the horizontal alignment options.
type textHorizontalAlign int
type TextHorizontalAlign int
const (
// TextHorizontalAlignUnset is the unset state for text horizontal alignment.
TextHorizontalAlignUnset textHorizontalAlign = 0
TextHorizontalAlignUnset TextHorizontalAlign = 0
// TextHorizontalAlignLeft aligns a string horizontally so that it's left ligature starts at horizontal pixel 0.
TextHorizontalAlignLeft textHorizontalAlign = 1
TextHorizontalAlignLeft TextHorizontalAlign = 1
// TextHorizontalAlignCenter left aligns a string horizontally so that there are equal pixels
// to the left and to the right of a string within a box.
TextHorizontalAlignCenter textHorizontalAlign = 2
TextHorizontalAlignCenter TextHorizontalAlign = 2
// TextHorizontalAlignRight right aligns a string horizontally so that the right ligature ends at the right-most pixel
// of a box.
TextHorizontalAlignRight textHorizontalAlign = 3
TextHorizontalAlignRight TextHorizontalAlign = 3
)
// TextWrap is an enum for the word wrap options.
type textWrap int
type TextWrap int
const (
// TextWrapUnset is the unset state for text wrap options.
TextWrapUnset textWrap = 0
TextWrapUnset TextWrap = 0
// TextWrapNone will spill text past horizontal boundaries.
TextWrapNone textWrap = 1
TextWrapNone TextWrap = 1
// TextWrapWord will split a string on words (i.e. spaces) to fit within a horizontal boundary.
TextWrapWord textWrap = 2
TextWrapWord TextWrap = 2
// TextWrapRune will split a string on a rune (i.e. utf-8 codepage) to fit within a horizontal boundary.
TextWrapRune textWrap = 3
TextWrapRune TextWrap = 3
)
// TextVerticalAlign is an enum for the vertical alignment options.
type textVerticalAlign int
type TextVerticalAlign int
const (
// TextVerticalAlignUnset is the unset state for vertical alignment options.
TextVerticalAlignUnset textVerticalAlign = 0
TextVerticalAlignUnset TextVerticalAlign = 0
// TextVerticalAlignBaseline aligns text according to the "baseline" of the string, or where a normal ascender begins.
TextVerticalAlignBaseline textVerticalAlign = 1
TextVerticalAlignBaseline TextVerticalAlign = 1
// TextVerticalAlignBottom aligns the text according to the lowers pixel of any of the ligatures (ex. g or q both extend below the baseline).
TextVerticalAlignBottom textVerticalAlign = 2
TextVerticalAlignBottom TextVerticalAlign = 2
// TextVerticalAlignMiddle aligns the text so that there is an equal amount of space above and below the top and bottom of the ligatures.
TextVerticalAlignMiddle textVerticalAlign = 3
TextVerticalAlignMiddle TextVerticalAlign = 3
// TextVerticalAlignMiddleBaseline aligns the text veritcally so that there is an equal number of pixels above and below the baseline of the string.
TextVerticalAlignMiddleBaseline textVerticalAlign = 4
TextVerticalAlignMiddleBaseline TextVerticalAlign = 4
// TextVerticalAlignTop alignts the text so that the top of the ligatures are at y-pixel 0 in the container.
TextVerticalAlignTop textVerticalAlign = 5
TextVerticalAlignTop TextVerticalAlign = 5
)
var (
@ -57,9 +57,9 @@ var (
// TextStyle encapsulates text style options.
type TextStyle struct {
HorizontalAlign textHorizontalAlign
VerticalAlign textVerticalAlign
Wrap textWrap
HorizontalAlign TextHorizontalAlign
VerticalAlign TextVerticalAlign
Wrap TextWrap
}
type text struct{}

2
tick.go
View file

@ -4,7 +4,7 @@ import "math"
// TicksProvider is a type that provides ticks.
type TicksProvider interface {
GetTicks(vf ValueFormatter) []Tick
GetTicks(r Renderer, defaults Style, vf ValueFormatter) []Tick
}
// Tick represents a label on an axis.

4
time_series.go
View file

@ -7,7 +7,7 @@ type TimeSeries struct {
Name string
Style Style
YAxis yAxisType
YAxis YAxisType
XValues []time.Time
YValues []float64
@ -50,7 +50,7 @@ func (ts TimeSeries) GetValueFormatters() (x, y ValueFormatter) {
}
// GetYAxis returns which YAxis the series draws on.
func (ts TimeSeries) GetYAxis() yAxisType {
func (ts TimeSeries) GetYAxis() YAxisType {
return ts.YAxis
}

6
xaxis.go
View file

@ -13,7 +13,7 @@ type XAxis struct {
Range Range
Ticks []Tick
TickPosition tickPosition
TickPosition TickPosition
GridLines []GridLine
GridMajorStyle Style
@ -31,7 +31,7 @@ func (xa XAxis) GetStyle() Style {
}
// GetTickPosition returns the tick position option for the axis.
func (xa XAxis) GetTickPosition(defaults ...tickPosition) tickPosition {
func (xa XAxis) GetTickPosition(defaults ...TickPosition) TickPosition {
if xa.TickPosition == TickPositionUnset {
if len(defaults) > 0 {
return defaults[0]
@ -51,7 +51,7 @@ func (xa XAxis) GetTicks(r Renderer, ra Range, defaults Style, vf ValueFormatter
return xa.Ticks
}
if tp, isTickProvider := ra.(TicksProvider); isTickProvider {
return tp.GetTicks(vf)
return tp.GetTicks(r, defaults, vf)
}
tickStyle := xa.Style.InheritFrom(defaults)
return GenerateContinuousTicks(r, ra, false, tickStyle, vf)

4
yaxis.go
View file

@ -13,7 +13,7 @@ type YAxis struct {
Zero GridLine
AxisType yAxisType
AxisType YAxisType
ValueFormatter ValueFormatter
Range Range
@ -45,7 +45,7 @@ func (ya YAxis) GetTicks(r Renderer, ra Range, defaults Style, vf ValueFormatter
return ya.Ticks
}
if tp, isTickProvider := ra.(TicksProvider); isTickProvider {
return tp.GetTicks(vf)
return tp.GetTicks(r, defaults, vf)
}
tickStyle := ya.Style.InheritFrom(defaults)
return GenerateContinuousTicks(r, ra, true, tickStyle, vf)