refactor: reset

pie_chart.go

@@ -1,159 +0,0 @@
-// MIT License
-
-// Copyright (c) 2022 Tree Xie
-
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-// SOFTWARE.
-
-package charts
-
-import (
-	"errors"
-	"math"
-
-	"github.com/golang/freetype/truetype"
-	"github.com/wcharczuk/go-chart/v2"
-)
-
-func getPieStyle(theme *Theme, index int) chart.Style {
-	seriesColor := theme.GetSeriesColor(index)
-	return chart.Style{
-		StrokeColor: seriesColor,
-		StrokeWidth: 1,
-		FillColor:   seriesColor,
-	}
-}
-
-type pieChartOption struct {
-	Theme      string
-	Font       *truetype.Font
-	SeriesList SeriesList
-}
-
-func pieChartRender(opt pieChartOption, result *basicRenderResult) error {
-	d, err := NewDraw(DrawOption{
-		Parent: result.d,
-	}, PaddingOption(chart.Box{
-		Top: result.titleBox.Height(),
-	}))
-	if err != nil {
-		return err
-	}
-
-	values := make([]float64, len(opt.SeriesList))
-	total := float64(0)
-	radiusValue := ""
-	for index, series := range opt.SeriesList {
-		if len(series.Radius) != 0 {
-			radiusValue = series.Radius
-		}
-		value := float64(0)
-		for _, item := range series.Data {
-			value += item.Value
-		}
-		values[index] = value
-		total += value
-	}
-	if total <= 0 {
-		return errors.New("The sum value of pie chart should gt 0")
-	}
-	r := d.Render
-	theme := NewTheme(opt.Theme)
-
-	box := d.Box
-	cx := box.Width() >> 1
-	cy := box.Height() >> 1
-
-	diameter := chart.MinInt(box.Width(), box.Height())
-	radius := getRadius(float64(diameter), radiusValue)
-
-	labelLineWidth := 15
-	if radius < 50 {
-		labelLineWidth = 10
-	}
-	labelRadius := radius + float64(labelLineWidth)
-
-	seriesNames := opt.SeriesList.Names()
-
-	if len(values) == 1 {
-		getPieStyle(theme, 0).WriteToRenderer(r)
-		d.moveTo(cx, cy)
-		d.circle(radius, cx, cy)
-	} else {
-		currentValue := float64(0)
-		for index, v := range values {
-
-			pieStyle := getPieStyle(theme, index)
-			pieStyle.WriteToRenderer(r)
-			d.moveTo(cx, cy)
-			start := chart.PercentToRadians(currentValue/total) - math.Pi/2
-			currentValue += v
-			percent := (v / total)
-			delta := chart.PercentToRadians(percent)
-			d.arcTo(cx, cy, radius, radius, start, delta)
-			d.lineTo(cx, cy)
-			r.Close()
-			r.FillStroke()
-
-			series := opt.SeriesList[index]
-			// 是否显示label
-			showLabel := series.Label.Show
-			if !showLabel {
-				continue
-			}
-
-			// label的角度为饼块中间
-			angle := start + delta/2
-			startx := cx + int(radius*math.Cos(angle))
-			starty := cy + int(radius*math.Sin(angle))
-
-			endx := cx + int(labelRadius*math.Cos(angle))
-			endy := cy + int(labelRadius*math.Sin(angle))
-			d.moveTo(startx, starty)
-			d.lineTo(endx, endy)
-			offset := labelLineWidth
-			if endx < cx {
-				offset *= -1
-			}
-			d.moveTo(endx, endy)
-			endx += offset
-			d.lineTo(endx, endy)
-			r.Stroke()
-			textStyle := chart.Style{
-				FontColor: theme.GetTextColor(),
-				FontSize:  labelFontSize,
-				Font:      opt.Font,
-			}
-			if !series.Label.Color.IsZero() {
-				textStyle.FontColor = series.Label.Color
-			}
-			textStyle.GetTextOptions().WriteToRenderer(r)
-			text := NewPieLabelFormatter(seriesNames, series.Label.Formatter)(index, v, percent)
-			textBox := r.MeasureText(text)
-			textMargin := 3
-			x := endx + textMargin
-			y := endy + textBox.Height()>>1 - 1
-			if offset < 0 {
-				textWidth := textBox.Width()
-				x = endx - textWidth - textMargin
-			}
-			d.text(text, x, y)
-		}
-	}
-	return nil
-}