can just supply inverted ranges.
This commit is contained in:
parent
21986dbce7
commit
78cbfa62bc
7 changed files with 66 additions and 29 deletions
5
axis.go
5
axis.go
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@ -25,12 +25,15 @@ const (
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// Axis is a chart feature detailing what values happen where.
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type Axis interface {
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GetName() string
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SetName(name string)
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GetStyle() Style
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SetStyle(style Style)
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GetTicks() []Tick
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GenerateTicks(r Renderer, ra Range, vf ValueFormatter) []Tick
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// GetGridLines returns the gridlines for the axis.
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// GenerateGridLines returns the gridlines for the axis.
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GetGridLines(ticks []Tick) []GridLine
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// Measure should return an absolute box for the axis.
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@ -56,7 +56,7 @@ func (r *ContinuousRange) SetDomain(domain int) {
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// String returns a simple string for the ContinuousRange.
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func (r ContinuousRange) String() string {
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return fmt.Sprintf("ContinuousRange [%.2f,%.2f] => %d", r.Min, r.Max, r.Domain)
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return fmt.Sprintf("ContinuousRange [%.2f,%.2f] => %f", r.Min, r.Max, r.Domain)
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}
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// Translate maps a given value into the ContinuousRange space.
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2
range.go
2
range.go
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@ -20,7 +20,7 @@ type Stringable interface {
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String() string
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}
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// Range is a
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// Range is a common interface for a range of values.
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type Range interface {
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Stringable
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IsZeroable
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11
tick.go
11
tick.go
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@ -49,17 +49,18 @@ func GenerateContinuousTicks(r Renderer, ra Range, isVertical bool, style Style,
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style.GetTextOptions().WriteToRenderer(r)
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labelBox := r.MeasureText(minLabel)
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var tickSize int
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var tickSize float64
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if isVertical {
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tickSize = labelBox.Height() + DefaultMinimumTickVerticalSpacing
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tickSize = float64(labelBox.Height() + DefaultMinimumTickVerticalSpacing)
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} else {
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tickSize = labelBox.Width() + DefaultMinimumTickHorizontalSpacing
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tickSize = float64(labelBox.Width() + DefaultMinimumTickHorizontalSpacing)
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}
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domainRemainder := (ra.GetDomain()) - (tickSize * 2)
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domain := float64(ra.GetDomain())
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domainRemainder := domain - (tickSize * 2)
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intermediateTickCount := int(math.Floor(float64(domainRemainder) / float64(tickSize)))
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rangeDelta := max - min
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rangeDelta := math.Abs(max - min)
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tickStep := rangeDelta / float64(intermediateTickCount)
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roundTo := Math.GetRoundToForDelta(rangeDelta) / 10
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55
tick_test.go
55
tick_test.go
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@ -1,12 +1,57 @@
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package chart
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/*
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func TestGenerateTicksWithStep(t *testing.T) {
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import (
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"testing"
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assert "github.com/blendlabs/go-assert"
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)
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func TestGenerateContinuousTicks(t *testing.T) {
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assert := assert.New(t)
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f, err := GetDefaultFont()
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assert.Nil(err)
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r, err := PNG(1024, 1024)
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assert.Nil(err)
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r.SetFont(f)
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ticks := GenerateContinuousTicksWithStep(&ContinuousRange{Min: 1.0, Max: 10.0, Domain: 100}, 1.0, FloatValueFormatter, false)
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assert.Len(ticks, 10)
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ra := &ContinuousRange{
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Min: 0.0,
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Max: 10.0,
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Domain: 256,
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}
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vf := FloatValueFormatter
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ticks := GenerateContinuousTicks(r, ra, false, Style{}, vf)
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assert.NotEmpty(ticks)
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assert.Len(ticks, 11)
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assert.Equal(0.0, ticks[0].Value)
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assert.Equal(10, ticks[len(ticks)-1].Value)
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}
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func TestGenerateContinuousTicksDescending(t *testing.T) {
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assert := assert.New(t)
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f, err := GetDefaultFont()
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assert.Nil(err)
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r, err := PNG(1024, 1024)
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assert.Nil(err)
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r.SetFont(f)
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ra := &ContinuousRange{
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Min: 10.0,
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Max: 0.0,
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Domain: 256,
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}
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vf := FloatValueFormatter
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ticks := GenerateContinuousTicks(r, ra, false, Style{}, vf)
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assert.NotEmpty(ticks)
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assert.Len(ticks, 11)
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assert.Equal(10.0, ticks[0].Value)
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assert.Equal(0.0, ticks[len(ticks)-1].Value)
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}
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*/
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8
xaxis.go
8
xaxis.go
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@ -1,9 +1,6 @@
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package chart
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import (
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"math"
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"sort"
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)
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import "math"
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// XAxis represents the horizontal axis.
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type XAxis struct {
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@ -71,7 +68,6 @@ func (xa XAxis) GetGridLines(ticks []Tick) []GridLine {
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// Measure returns the bounds of the axis.
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func (xa XAxis) Measure(r Renderer, canvasBox Box, ra Range, defaults Style, ticks []Tick) Box {
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tickStyle := xa.TickStyle.InheritFrom(xa.Style.InheritFrom(defaults))
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sort.Sort(Ticks(ticks))
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tp := xa.GetTickPosition()
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@ -124,8 +120,6 @@ func (xa XAxis) Render(r Renderer, canvasBox Box, ra Range, defaults Style, tick
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r.LineTo(canvasBox.Right, canvasBox.Bottom)
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r.Stroke()
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sort.Sort(Ticks(ticks))
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tp := xa.GetTickPosition()
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var tx, ty int
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10
yaxis.go
10
yaxis.go
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@ -1,9 +1,6 @@
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package chart
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import (
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"math"
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"sort"
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)
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import "math"
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// YAxis is a veritcal rule of the range.
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// There can be (2) y-axes; a primary and secondary.
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@ -16,6 +13,7 @@ type YAxis struct {
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Zero GridLine
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AxisType YAxisType
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Ascending bool
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ValueFormatter ValueFormatter
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Range Range
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@ -74,8 +72,6 @@ func (ya YAxis) GetGridLines(ticks []Tick) []GridLine {
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// Measure returns the bounds of the axis.
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func (ya YAxis) Measure(r Renderer, canvasBox Box, ra Range, defaults Style, ticks []Tick) Box {
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sort.Sort(Ticks(ticks))
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var tx int
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if ya.AxisType == YAxisPrimary {
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tx = canvasBox.Right + DefaultYAxisMargin
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@ -128,8 +124,6 @@ func (ya YAxis) Render(r Renderer, canvasBox Box, ra Range, defaults Style, tick
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tickStyle := ya.TickStyle.InheritFrom(ya.Style.InheritFrom(defaults))
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tickStyle.WriteToRenderer(r)
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sort.Sort(Ticks(ticks))
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sw := tickStyle.GetStrokeWidth(defaults.StrokeWidth)
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var lx int
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