finalizing work on text rotation.

.vscode/launch.json

@@ -0,0 +1,18 @@
+{
+	"version": "0.2.0",
+	"configurations": [
+		{
+			"name": "Launch",
+			"type": "go",
+			"request": "launch",
+			"mode": "test",
+			"remotePath": "",
+			"port": 2345,
+			"host": "127.0.0.1",
+			"program": "${workspaceRoot}",
+			"env": {},
+			"args": [],
+			"showLog": true
+		}
+	]
+}

_examples/request_timings/main.go

@@ -14,11 +14,11 @@ func readData() ([]time.Time, []float64) {
 	var yvalues []float64
 	util.ReadFileByLines("requests.csv", func(line string) {
 		parts := strings.Split(line, ",")
-		year := util.ParseInt(parts[0])
-		month := util.ParseInt(parts[1])
-		day := util.ParseInt(parts[2])
-		hour := util.ParseInt(parts[3])
-		elapsedMillis := util.ParseFloat64(parts[4])
+		year := util.String.ParseInt(parts[0])
+		month := util.String.ParseInt(parts[1])
+		day := util.String.ParseInt(parts[2])
+		hour := util.String.ParseInt(parts[3])
+		elapsedMillis := util.String.ParseFloat64(parts[4])
 		xvalues = append(xvalues, time.Date(year, time.Month(month), day, hour, 0, 0, 0, time.UTC))
 		yvalues = append(yvalues, elapsedMillis)
 	})

market_hours_range.go

@@ -33,12 +33,12 @@ func (mhr MarketHoursRange) IsZero() bool {
 
 // GetMin returns the min value.
 func (mhr MarketHoursRange) GetMin() float64 {
-	return TimeToFloat64(mhr.Min)
+	return Time.ToFloat64(mhr.Min)
 }
 
 // GetMax returns the max value.
 func (mhr MarketHoursRange) GetMax() float64 {
-	return TimeToFloat64(mhr.GetEffectiveMax())
+	return Time.ToFloat64(mhr.GetEffectiveMax())
 }
 
 // GetEffectiveMax gets either the close on the max, or the max itself.
@@ -52,13 +52,13 @@ func (mhr MarketHoursRange) GetEffectiveMax() time.Time {
 
 // SetMin sets the min value.
 func (mhr *MarketHoursRange) SetMin(min float64) {
-	mhr.Min = Float64ToTime(min)
+	mhr.Min = Time.FromFloat64(min)
 	mhr.Min = mhr.Min.In(mhr.GetTimezone())
 }
 
 // SetMax sets the max value.
 func (mhr *MarketHoursRange) SetMax(max float64) {
-	mhr.Max = Float64ToTime(max)
+	mhr.Max = Time.FromFloat64(max)
 	mhr.Max = mhr.Max.In(mhr.GetTimezone())
 }
 
@@ -159,7 +159,7 @@ func (mhr *MarketHoursRange) makeTicks(vf ValueFormatter, times []time.Time) []T
 	ticks := make([]Tick, len(times))
 	for index, t := range times {
 		ticks[index] = Tick{
-			Value: TimeToFloat64(t),
+			Value: Time.ToFloat64(t),
 			Label: vf(t),
 		}
 	}
@@ -172,7 +172,7 @@ func (mhr MarketHoursRange) String() string {
 
 // Translate maps a given value into the ContinuousRange space.
 func (mhr MarketHoursRange) Translate(value float64) int {
-	valueTime := Float64ToTime(value)
+	valueTime := Time.FromFloat64(value)
 	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)

market_hours_range_test.go

@@ -35,9 +35,9 @@ func TestMarketHoursRangeTranslate(t *testing.T) {
 
 	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)))
-	assert.Equal(1000, r.Translate(TimeToFloat64(r.Max)))
+	assert.Equal(0, r.Translate(Time.ToFloat64(r.Min)))
+	assert.Equal(400, r.Translate(Time.ToFloat64(weds)))
+	assert.Equal(1000, r.Translate(Time.ToFloat64(r.Max)))
 }
 
 func TestMarketHoursRangeGetTicks(t *testing.T) {
@@ -67,6 +67,6 @@ func TestMarketHoursRangeGetTicks(t *testing.T) {
 	ticks := ra.GetTicks(r, defaults, TimeValueFormatter)
 	assert.NotEmpty(ticks)
 	assert.Len(ticks, 5)
-	assert.NotEqual(TimeToFloat64(ra.Min), ticks[0].Value)
+	assert.NotEqual(Time.ToFloat64(ra.Min), ticks[0].Value)
 	assert.NotEmpty(ticks[0].Label)
 }

math_util.go

@@ -19,16 +19,6 @@ const (
 	_r2d  = (180.0 / math.Pi)
 )
 
-// TimeToFloat64 returns a float64 representation of a time.
-func TimeToFloat64(t time.Time) float64 {
-	return float64(t.UnixNano())
-}
-
-// Float64ToTime returns a time from a float64.
-func Float64ToTime(tf float64) time.Time {
-	return time.Unix(0, int64(tf))
-}
-
 var (
 	// Math contains helper methods for common math operations.
 	Math = &mathUtil{}

time_series.go

@@ -30,14 +30,14 @@ func (ts TimeSeries) Len() int {
 
 // GetValue gets a value at a given index.
 func (ts TimeSeries) GetValue(index int) (x, y float64) {
-	x = TimeToFloat64(ts.XValues[index])
+	x = Time.ToFloat64(ts.XValues[index])
 	y = ts.YValues[index]
 	return
 }
 
 // GetLastValue gets the last value.
 func (ts TimeSeries) GetLastValue() (x, y float64) {
-	x = TimeToFloat64(ts.XValues[len(ts.XValues)-1])
+	x = Time.ToFloat64(ts.XValues[len(ts.XValues)-1])
 	y = ts.YValues[len(ts.YValues)-1]
 	return
 }

time_util.go

@@ -0,0 +1,20 @@
+package chart
+
+import "time"
+
+var (
+	// Time contains time utility functions.
+	Time = timeUtil{}
+)
+
+type timeUtil struct{}
+
+// TimeToFloat64 returns a float64 representation of a time.
+func (tu timeUtil) ToFloat64(t time.Time) float64 {
+	return float64(t.UnixNano())
+}
+
+// Float64ToTime returns a time from a float64.
+func (tu timeUtil) FromFloat64(tf float64) time.Time {
+	return time.Unix(0, int64(tf))
+}

value_formatter_test.go

@@ -11,7 +11,7 @@ func TestTimeValueFormatterWithFormat(t *testing.T) {
 	assert := assert.New(t)
 
 	d := time.Now()
-	di := TimeToFloat64(d)
+	di := Time.ToFloat64(d)
 	df := float64(di)
 
 	s := TimeValueFormatterWithFormat(d, DefaultDateFormat)