zeni/go-chart
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This commit is contained in:
Will Charczuk 2016-07-12 22:04:30 -07:00
parent ee34d53209
commit 989aa5974d
6 changed files with 317 additions and 21 deletions
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18
xaxis.go
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@ -30,27 +30,27 @@ func (xa XAxis) GetStyle() Style {
// GetTicks returns the ticks for a series. It coalesces between user provided ticks and
// generated ticks.
func (xa XAxis) GetTicks(r Renderer, ra Range, vf ValueFormatter) []Tick {
func (xa XAxis) GetTicks(r Renderer, ra Range, defaults Style, vf ValueFormatter) []Tick {
if len(xa.Ticks) > 0 {
return xa.Ticks
}
return xa.generateTicks(r, ra, vf)
return xa.generateTicks(r, ra, defaults, vf)
}
func (xa XAxis) generateTicks(r Renderer, ra Range, vf ValueFormatter) []Tick {
step := xa.getTickStep(r, ra, vf)
func (xa XAxis) generateTicks(r Renderer, ra Range, defaults Style, vf ValueFormatter) []Tick {
step := xa.getTickStep(r, ra, defaults, vf)
return GenerateTicksWithStep(ra, step, vf)
}
func (xa XAxis) getTickStep(r Renderer, ra Range, vf ValueFormatter) float64 {
tickCount := xa.getTickCount(r, ra, vf)
func (xa XAxis) getTickStep(r Renderer, ra Range, defaults Style, vf ValueFormatter) float64 {
tickCount := xa.getTickCount(r, ra, defaults, vf)
step := ra.Delta() / float64(tickCount)
return step
}
func (xa XAxis) getTickCount(r Renderer, ra Range, vf ValueFormatter) int {
fontSize := xa.Style.GetFontSize(DefaultFontSize)
r.SetFontSize(fontSize)
func (xa XAxis) getTickCount(r Renderer, ra Range, defaults Style, vf ValueFormatter) int {
r.SetFont(xa.Style.GetFont(defaults.GetFont()))
r.SetFontSize(xa.Style.GetFontSize(defaults.GetFontSize(DefaultFontSize)))
// take a cut at determining the 'widest' value.
l0 := vf(ra.Min)