zeni/go-chart
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updates

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This commit is contained in:
Will Charczuk 2016-07-12 22:55:46 -07:00
parent 92edbcad44
commit 07c96b1948
2 changed files with 35 additions and 7 deletions
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31
chart.go
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@ -95,6 +95,11 @@ func (c Chart) Render(rp RendererProvider, w io.Writer) error {
xf, yf, yfa := c.getValueFormatters()
xr, yr, yra = c.setRangeDomains(canvasBox, xr, yr, yra)
err = c.checkRanges(xr, yr, yra)
if err != nil {
return err
}
if c.hasAxes() {
xt, yt, yta = c.getAxesTicks(r, xr, yr, yra, xf, yf, yfa)
canvasBox = c.getAxisAdjustedCanvasBox(r, canvasBox, xr, yr, yra, xt, yt, yta)
@ -180,6 +185,23 @@ func (c Chart) getRanges() (xrange, yrange, yrangeAlt Range) {
return
}
func (c Chart) checkRanges(xr, yr, yra Range) error {
if math.IsInf(xr.Delta(), 0) || math.IsNaN(xr.Delta()) {
return errors.New("Invalid (infinite or NaN) x-range delta")
}
if math.IsInf(yr.Delta(), 0) || math.IsNaN(yr.Delta()) {
return errors.New("Invalid (infinite or NaN) y-range delta")
}
if c.hasSecondarySeries() {
if math.IsInf(yra.Delta(), 0) || math.IsNaN(yra.Delta()) {
return errors.New("Invalid (infinite or NaN) y-secondary-range delta")
}
}
return nil
}
func (c Chart) getDefaultCanvasBox() Box {
dpt := c.Background.Padding.GetTop(DefaultBackgroundPadding.Top)
dpl := c.Background.Padding.GetLeft(DefaultBackgroundPadding.Left)
@ -275,6 +297,15 @@ func (c Chart) hasAnnotationSeries() bool {
return false
}
func (c Chart) hasSecondarySeries() bool {
for _, s := range c.Series {
if s.GetYAxis() == YAxisSecondary {
return true
}
}
return false
}
func (c Chart) getAnnotationAdjustedCanvasBox(r Renderer, canvasBox Box, xr, yr, yra Range, xf, yf, yfa ValueFormatter) Box {
annotationSeriesBox := canvasBox.Clone()
for seriesIndex, s := range c.Series {

11
yaxis.go
View file

@ -37,14 +37,10 @@ func (ya YAxis) GetStyle() Style {
// GetTicks returns the ticks for a series. It coalesces between user provided ticks and
// generated ticks.
func (ya YAxis) GetTicks(r Renderer, ra Range, defaults Style, vf ValueFormatter) []Tick {
var ticks []Tick
if len(ya.Ticks) > 0 {
ticks = ya.Ticks
} else {
ticks = ya.generateTicks(r, ra, defaults, vf)
return ya.Ticks
}
return ticks
return ya.generateTicks(r, ra, defaults, vf)
}
func (ya YAxis) generateTicks(r Renderer, ra Range, defaults Style, vf ValueFormatter) []Tick {
@ -65,7 +61,8 @@ func (ya YAxis) getTickCount(r Renderer, ra Range, defaults Style, vf ValueForma
//given the domain, figure out how many ticks we can draw ...
label := vf(ra.Min)
tb := r.MeasureText(label)
return int(math.Ceil(float64(ra.Domain) / float64(tb.Height()+DefaultMinimumTickVerticalSpacing)))
count := int(math.Ceil(float64(ra.Domain) / float64(tb.Height()+DefaultMinimumTickVerticalSpacing)))
return count
}
// GetGridLines returns the gridlines for the axis.