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feat: support legend render

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This commit is contained in:
vicanso 2022-06-07 23:04:39 +08:00
parent 7ee13fe914
commit 4cf494088e
3 changed files with 216 additions and 5 deletions
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11
painter.go
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@ -170,6 +170,9 @@ func NewPainter(opts PainterOptions, opt ...PainterOption) (*Painter, error) {
font: font,
}
p.setOptions(opt...)
if p.theme == nil {
p.theme = NewTheme(ThemeLight)
}
return p, nil
}
func (p *Painter) setOptions(opts ...PainterOption) {
@ -705,11 +708,11 @@ func (p *Painter) LegendLineDot(box Box) *Painter {
dotHeight := 5
p.render.SetStrokeWidth(float64(strokeWidth))
center := (height - strokeWidth) >> 1
p.MoveTo(box.Left, box.Top+center)
p.LineTo(box.Right, box.Top+center)
center := (height-strokeWidth)>>1 - 1
p.MoveTo(box.Left, box.Top-center)
p.LineTo(box.Right, box.Top-center)
p.Stroke()
p.Circle(float64(dotHeight), box.Left+width>>1, center)
p.Circle(float64(dotHeight), box.Left+width>>1, box.Top-center)
p.FillStroke()
return p
}