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This commit is contained in:
Will Charczuk 2019-02-13 16:09:26 -08:00
parent 3cb33d48d3
commit 26eaa1d898
76 changed files with 1076 additions and 1717 deletions
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26
pie_chart.go
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@ -4,16 +4,8 @@ import (
"errors"
"fmt"
"io"
"math"
"github.com/golang/freetype/truetype"
"github.com/wcharczuk/go-chart/util"
)
const (
_pi = math.Pi
_pi2 = math.Pi / 2.0
_pi4 = math.Pi / 4.0
)
// PieChart is a chart that draws sections of a circle based on percentages.
@ -131,7 +123,7 @@ func (pc PieChart) drawTitle(r Renderer) {
func (pc PieChart) drawSlices(r Renderer, canvasBox Box, values []Value) {
cx, cy := canvasBox.Center()
diameter := util.Math.MinInt(canvasBox.Width(), canvasBox.Height())
diameter := MinInt(canvasBox.Width(), canvasBox.Height())
radius := float64(diameter >> 1)
labelRadius := (radius * 2.0) / 3.0
@ -148,8 +140,8 @@ func (pc PieChart) drawSlices(r Renderer, canvasBox Box, values []Value) {
v.Style.InheritFrom(pc.stylePieChartValue(index)).WriteToRenderer(r)
r.MoveTo(cx, cy)
rads = util.Math.PercentToRadians(total)
delta = util.Math.PercentToRadians(v.Value)
rads = PercentToRadians(total)
delta = PercentToRadians(v.Value)
r.ArcTo(cx, cy, radius, radius, rads, delta)
@ -165,9 +157,9 @@ func (pc PieChart) drawSlices(r Renderer, canvasBox Box, values []Value) {
for index, v := range values {
v.Style.InheritFrom(pc.stylePieChartValue(index)).WriteToRenderer(r)
if len(v.Label) > 0 {
delta2 = util.Math.PercentToRadians(total + (v.Value / 2.0))
delta2 = util.Math.RadianAdd(delta2, _pi2)
lx, ly = util.Math.CirclePoint(cx, cy, labelRadius, delta2)
delta2 = PercentToRadians(total + (v.Value / 2.0))
delta2 = RadianAdd(delta2, _pi2)
lx, ly = CirclePoint(cx, cy, labelRadius, delta2)
tb := r.MeasureText(v.Label)
lx = lx - (tb.Width() >> 1)
@ -199,7 +191,7 @@ func (pc PieChart) getDefaultCanvasBox() Box {
}
func (pc PieChart) getCircleAdjustedCanvasBox(canvasBox Box) Box {
circleDiameter := util.Math.MinInt(canvasBox.Width(), canvasBox.Height())
circleDiameter := MinInt(canvasBox.Width(), canvasBox.Height())
square := Box{
Right: circleDiameter,
@ -245,7 +237,7 @@ func (pc PieChart) stylePieChartValue(index int) Style {
}
func (pc PieChart) getScaledFontSize() float64 {
effectiveDimension := util.Math.MinInt(pc.GetWidth(), pc.GetHeight())
effectiveDimension := MinInt(pc.GetWidth(), pc.GetHeight())
if effectiveDimension >= 2048 {
return 48.0
} else if effectiveDimension >= 1024 {
@ -284,7 +276,7 @@ func (pc PieChart) styleDefaultsTitle() Style {
}
func (pc PieChart) getTitleFontSize() float64 {
effectiveDimension := util.Math.MinInt(pc.GetWidth(), pc.GetHeight())
effectiveDimension := MinInt(pc.GetWidth(), pc.GetHeight())
if effectiveDimension >= 2048 {
return 48
} else if effectiveDimension >= 1024 {