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feat: support rect legend

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This commit is contained in:
vicanso 2022-04-14 20:43:32 +08:00
parent a5754bb1b3
commit a713c3023e
4 changed files with 45 additions and 24 deletions
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52
legend.go
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@ -48,8 +48,14 @@ type LegendOption struct {
Align string
// The layout orientation of legend, it can be horizontal or vertical, default is horizontal.
Orient string
// Icon of the legend.
Icon string
}
const (
LegendIconRect = "rect"
)
// NewLegendOption creates a new legend option by legend text list
func NewLegendOption(data []string, position ...string) LegendOption {
opt := LegendOption{
@ -143,18 +149,6 @@ func (l *legend) Render() (chart.Box, error) {
}
x = left
for index, text := range opt.Data {
seriesColor := theme.GetSeriesColor(index)
fillColor := seriesColor
if !theme.IsDark() {
fillColor = theme.GetBackgroundColor()
}
style := chart.Style{
StrokeColor: seriesColor,
FillColor: fillColor,
StrokeWidth: 3,
}
style.GetFillAndStrokeOptions().WriteDrawingOptionsToRenderer(r)
textBox := r.MeasureText(text)
var renderText func()
if opt.Orient == OrientVertical {
@ -183,12 +177,36 @@ func (l *legend) Render() (chart.Box, error) {
if opt.Align == PositionRight {
renderText()
}
seriesColor := theme.GetSeriesColor(index)
fillColor := seriesColor
if !theme.IsDark() {
fillColor = theme.GetBackgroundColor()
}
style := chart.Style{
StrokeColor: seriesColor,
FillColor: fillColor,
StrokeWidth: 3,
}
if opt.Icon == LegendIconRect {
style.FillColor = seriesColor
style.StrokeWidth = 1
}
style.GetFillAndStrokeOptions().WriteDrawingOptionsToRenderer(r)
legendDraw.moveTo(x, y)
legendDraw.lineTo(x+legendWidth, y)
r.Stroke()
legendDraw.circle(float64(legendDotHeight), x+legendWidth>>1, y)
r.FillStroke()
if opt.Icon == LegendIconRect {
legendDraw.moveTo(x, y-legendDotHeight)
legendDraw.lineTo(x+legendWidth, y-legendDotHeight)
legendDraw.lineTo(x+legendWidth, y+legendDotHeight)
legendDraw.lineTo(x, y+legendDotHeight)
legendDraw.lineTo(x, y-legendDotHeight)
r.FillStroke()
} else {
legendDraw.moveTo(x, y)
legendDraw.lineTo(x+legendWidth, y)
r.Stroke()
legendDraw.circle(float64(legendDotHeight), x+legendWidth>>1, y)
r.FillStroke()
}
x += legendWidth
if opt.Align != PositionRight {