zeni/go-chart
1
0
Fork 0
Code Issues Pull requests Projects Releases 2 Packages Wiki Activity Actions

ticks refactor.

Browse source
This commit is contained in:
Will Charczuk 2016-07-23 15:35:49 -07:00
parent 78645130e4
commit a6b6097c20
9 changed files with 131 additions and 184 deletions
Download patch file Download diff file Expand all files Collapse all files

33
xaxis.go
View file

@ -34,36 +34,11 @@ func (xa XAxis) GetTicks(r Renderer, ra Range, defaults Style, vf ValueFormatter
if len(xa.Ticks) > 0 {
return xa.Ticks
}
return xa.generateTicks(r, ra, defaults, 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, defaults Style, vf ValueFormatter) float64 {
tickCount := xa.getTickCount(r, ra, defaults, vf)
step := ra.GetDelta() / float64(tickCount)
return step
}
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.GetMin())
ln := vf(ra.GetMax())
ll := l0
if len(ln) > len(l0) {
ll = ln
if tp, isTickProvider := ra.(TicksProvider); isTickProvider {
return tp.GetTicks(vf)
}
llb := r.MeasureText(ll)
textWidth := llb.Width()
width := textWidth + DefaultMinimumTickHorizontalSpacing
count := int(math.Ceil(float64(ra.GetDomain()) / float64(width)))
return count
step := CalculateContinuousTickStep(r, ra, false, xa.Style.InheritFrom(defaults), vf)
return GenerateContinuousTicksWithStep(ra, step, vf)
}
// GetGridLines returns the gridlines for the axis.