103 lines
2.6 KiB
Go
103 lines
2.6 KiB
Go
// MIT License
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// Copyright (c) 2021 Tree Xie
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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package charts
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import (
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"bytes"
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"github.com/wcharczuk/go-chart/v2"
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)
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type (
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Title struct {
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Text string
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}
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Legend struct {
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Data []string
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}
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Option struct {
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Width int
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Height int
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Theme string
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XAxis XAxis
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// YAxis Axis
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Series []Series
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Title Title
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Legend Legend
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}
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)
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const (
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ThemeLight = "light"
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ThemeDark = "dark"
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)
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func render(c *chart.Chart, rp chart.RendererProvider) ([]byte, error) {
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buf := bytes.Buffer{}
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err := c.Render(rp, &buf)
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if err != nil {
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return nil, err
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}
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return buf.Bytes(), nil
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}
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func ToPNG(c *chart.Chart) ([]byte, error) {
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return render(c, chart.PNG)
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}
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func ToSVG(c *chart.Chart) ([]byte, error) {
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return render(c, chart.SVG)
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}
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func New(opt Option) *chart.Chart {
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tickPosition := chart.TickPositionBetweenTicks
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// tickPosition = chart.TickPositionUnset
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xAxis, xValues := GetXAxisAndValues(opt.XAxis, tickPosition, opt.Theme)
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legendSize := len(opt.Legend.Data)
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for index, item := range opt.Series {
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if len(item.XValues) == 0 {
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opt.Series[index].XValues = xValues
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}
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if index < legendSize && opt.Series[index].Name == "" {
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opt.Series[index].Name = opt.Legend.Data[index]
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}
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}
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c := &chart.Chart{
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Title: opt.Title.Text,
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Width: opt.Width,
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Height: opt.Height,
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XAxis: xAxis,
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YAxis: GetYAxis(opt.Theme),
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Series: GetSeries(opt.Series, tickPosition, opt.Theme),
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}
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// 设置secondary的样式
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c.YAxisSecondary.Style = c.YAxis.Style
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if legendSize != 0 {
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c.Elements = []chart.Renderable{
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DefaultLegend(c),
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}
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}
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return c
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}
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