zeni/go-chart
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you can now fill series.

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This commit is contained in:
Will Charczuk 2016-07-09 10:27:47 -07:00
parent 093a50f8b1
commit 0da2b41a9d
4 changed files with 44 additions and 16 deletions
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27
chart.go
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@ -333,24 +333,43 @@ func (c Chart) drawXAxisLabels(r Renderer, canvasBox Box, xrange Range) {
}
func (c Chart) drawSeries(r Renderer, canvasBox Box, index int, s Series, xrange, yrange Range) {
r.SetStrokeColor(s.GetStyle().GetStrokeColor(GetDefaultSeriesStrokeColor(index)))
r.SetStrokeWidth(s.GetStyle().GetStrokeWidth(DefaultStrokeWidth))
if s.Len() == 0 {
return
}
cx := canvasBox.Left
cy := canvasBox.Top
cb := canvasBox.Bottom
cw := canvasBox.Width
v0x, v0y := s.GetValue(0)
x0 := cw - xrange.Translate(v0x)
y0 := yrange.Translate(v0y)
r.MoveTo(x0+cx, y0+cy)
var vx, vy float64
var x, y int
fill := s.GetStyle().GetFillColor()
if !ColorIsZero(fill) {
r.SetFillColor(fill)
r.MoveTo(x0+cx, y0+cy)
for i := 1; i < s.Len(); i++ {
vx, vy = s.GetValue(i)
x = cw - xrange.Translate(vx)
y = yrange.Translate(vy)
r.LineTo(x+cx, y+cy)
}
r.LineTo(x+cx, cb)
r.LineTo(x0+cx, cb)
r.Close()
r.Fill()
}
stroke := s.GetStyle().GetStrokeColor(GetDefaultSeriesStrokeColor(index))
r.SetStrokeColor(stroke)
r.SetStrokeWidth(s.GetStyle().GetStrokeWidth(DefaultStrokeWidth))
r.MoveTo(x0+cx, y0+cy)
for i := 1; i < s.Len(); i++ {
vx, vy = s.GetValue(i)
x = cw - xrange.Translate(vx)