refactor: reset
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vicanso
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7e80e9a848
commit
c363d1d5e3
50 changed files with 55 additions and 10282 deletions
193
radar_chart.go
193
radar_chart.go
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// MIT License
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// Copyright (c) 2022 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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"errors"
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"github.com/golang/freetype/truetype"
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"github.com/wcharczuk/go-chart/v2"
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"github.com/wcharczuk/go-chart/v2/drawing"
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)
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type RadarIndicator struct {
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// Indicator's name
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Name string
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// The maximum value of indicator
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Max float64
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// The minimum value of indicator
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Min float64
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}
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type radarChartOption struct {
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Theme string
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Font *truetype.Font
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SeriesList SeriesList
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Indicators []RadarIndicator
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}
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func radarChartRender(opt radarChartOption, result *basicRenderResult) error {
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sides := len(opt.Indicators)
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if sides < 3 {
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return errors.New("The count of indicator should be >= 3")
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}
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maxValues := make([]float64, len(opt.Indicators))
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for _, series := range opt.SeriesList {
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for index, item := range series.Data {
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if index < len(maxValues) && item.Value > maxValues[index] {
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maxValues[index] = item.Value
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}
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}
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}
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for index, indicator := range opt.Indicators {
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if indicator.Max <= 0 {
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opt.Indicators[index].Max = maxValues[index]
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}
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}
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d, err := NewDraw(DrawOption{
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Parent: result.d,
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}, PaddingOption(chart.Box{
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Top: result.titleBox.Height(),
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}))
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if err != nil {
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return err
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}
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radiusValue := ""
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for _, series := range opt.SeriesList {
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if len(series.Radius) != 0 {
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radiusValue = series.Radius
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}
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}
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box := d.Box
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cx := box.Width() >> 1
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cy := box.Height() >> 1
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diameter := chart.MinInt(box.Width(), box.Height())
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radius := getRadius(float64(diameter), radiusValue)
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theme := NewTheme(opt.Theme)
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divideCount := 5
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divideRadius := float64(int(radius / float64(divideCount)))
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radius = divideRadius * float64(divideCount)
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style := chart.Style{
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StrokeColor: theme.GetAxisSplitLineColor(),
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StrokeWidth: 1,
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}
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r := d.Render
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style.WriteToRenderer(r)
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center := Point{
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X: cx,
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Y: cy,
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}
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for i := 0; i < divideCount; i++ {
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d.polygon(center, divideRadius*float64(i+1), sides)
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}
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points := getPolygonPoints(center, radius, sides)
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for _, p := range points {
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d.moveTo(center.X, center.Y)
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d.lineTo(p.X, p.Y)
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d.Render.Stroke()
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}
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// 文本
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textStyle := chart.Style{
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FontColor: theme.GetTextColor(),
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FontSize: labelFontSize,
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Font: opt.Font,
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}
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textStyle.GetTextOptions().WriteToRenderer(r)
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offset := 5
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// 文本生成
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for index, p := range points {
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name := opt.Indicators[index].Name
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b := r.MeasureText(name)
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isXCenter := p.X == center.X
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isYCenter := p.Y == center.Y
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isRight := p.X > center.X
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isLeft := p.X < center.X
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isTop := p.Y < center.Y
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isBottom := p.Y > center.Y
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x := p.X
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y := p.Y
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if isXCenter {
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x -= b.Width() >> 1
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if isTop {
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y -= b.Height()
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} else {
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y += b.Height()
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}
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}
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if isYCenter {
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y += b.Height() >> 1
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}
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if isTop {
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y += offset
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}
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if isBottom {
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y += offset
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}
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if isRight {
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x += offset
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}
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if isLeft {
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x -= (b.Width() + offset)
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}
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d.text(name, x, y)
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}
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// 雷达图
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angles := getPolygonPointAngles(sides)
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maxCount := len(opt.Indicators)
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for _, series := range opt.SeriesList {
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linePoints := make([]Point, 0, maxCount)
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for j, item := range series.Data {
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if j >= maxCount {
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continue
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}
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indicator := opt.Indicators[j]
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percent := (item.Value - indicator.Min) / (indicator.Max - indicator.Min)
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r := percent * radius
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p := getPolygonPoint(center, r, angles[j])
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linePoints = append(linePoints, p)
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}
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color := theme.GetSeriesColor(series.index)
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dotFillColor := drawing.ColorWhite
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if theme.IsDark() {
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dotFillColor = color
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}
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linePoints = append(linePoints, linePoints[0])
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s := LineStyle{
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StrokeColor: color,
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StrokeWidth: defaultStrokeWidth,
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DotWidth: defaultDotWidth,
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DotColor: color,
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DotFillColor: dotFillColor,
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FillColor: color.WithAlpha(20),
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}
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d.lineStroke(linePoints, s)
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d.fill(linePoints, s.Style())
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d.lineDot(linePoints[0:len(linePoints)-1], s)
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}
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return nil
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}
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