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feat: support customize title

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This commit is contained in:
vicanso 2021-12-29 23:18:41 +08:00
parent 2772798122
commit 06c326bdc3
9 changed files with 170 additions and 44 deletions
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63
charts.go
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@ -30,6 +30,7 @@ import (
"github.com/golang/freetype/truetype"
"github.com/wcharczuk/go-chart/v2"
"github.com/wcharczuk/go-chart/v2/drawing"
)
const (
@ -46,6 +47,8 @@ type (
Title struct {
Text string
Style chart.Style
Font *truetype.Font
Left string
}
Legend struct {
Data []string
@ -156,6 +159,17 @@ func ToSVG(g Graph) ([]byte, error) {
return render(g, chart.SVG)
}
func newTitleRenderable(title Title, font *truetype.Font, textColor drawing.Color) chart.Renderable {
if title.Text == "" || title.Style.Hidden {
return nil
}
title.Font = font
if title.Style.FontColor.IsZero() {
title.Style.FontColor = textColor
}
return NewTitleCustomize(title)
}
func newPieChart(opt Options) *chart.PieChart {
values := make(chart.Values, len(opt.Series))
for index, item := range opt.Series {
@ -164,11 +178,9 @@ func newPieChart(opt Options) *chart.PieChart {
Label: item.Name,
}
}
return &chart.PieChart{
p := &chart.PieChart{
Font: opt.Font,
Background: opt.getBackground(),
Title: opt.Title.Text,
TitleStyle: opt.Title.Style,
Width: opt.getWidth(),
Height: opt.getHeight(),
Values: values,
@ -178,6 +190,17 @@ func newPieChart(opt Options) *chart.PieChart {
},
},
}
// pie 图表默认设置为居中
if opt.Title.Left == "" {
opt.Title.Left = "center"
}
titleRender := newTitleRenderable(opt.Title, p.GetFont(), p.GetColorPalette().TextColor())
if titleRender != nil {
p.Elements = []chart.Renderable{
titleRender,
}
}
return p
}
func newChart(opt Options) *chart.Chart {
@ -214,8 +237,6 @@ func newChart(opt Options) *chart.Chart {
ColorPalette: &ThemeColorPalette{
Theme: opt.Theme,
},
Title: opt.Title.Text,
TitleStyle: opt.Title.Style,
Width: opt.getWidth(),
Height: opt.getHeight(),
XAxis: xAxis,
@ -224,20 +245,26 @@ func newChart(opt Options) *chart.Chart {
Series: GetSeries(opt.Series, tickPosition, opt.Theme),
}
// 设置secondary的样式
elements := make([]chart.Renderable, 0)
if legendSize != 0 {
c.Elements = []chart.Renderable{
LegendCustomize(c.Series, LegendOption{
Theme: opt.Theme,
IconDraw: DefaultLegendIconDraw,
Align: opt.Legend.Align,
Padding: opt.Legend.Padding,
Left: opt.Legend.Left,
Right: opt.Legend.Right,
Top: opt.Legend.Top,
Bottom: opt.Legend.Bottom,
}),
}
elements = append(elements, NewLegendCustomize(c.Series, LegendOption{
Theme: opt.Theme,
IconDraw: DefaultLegendIconDraw,
Align: opt.Legend.Align,
Padding: opt.Legend.Padding,
Left: opt.Legend.Left,
Right: opt.Legend.Right,
Top: opt.Legend.Top,
Bottom: opt.Legend.Bottom,
}))
}
titleRender := newTitleRenderable(opt.Title, c.GetFont(), c.GetColorPalette().TextColor())
if titleRender != nil {
elements = append(elements, titleRender)
}
if len(elements) != 0 {
c.Elements = elements
}
return c
}