zeni/go-chart
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big api overhauls.

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This commit is contained in:
Will Charczuk 2016-07-29 18:24:25 -07:00
parent d84d6790c0
commit cbc0002d2a
33 changed files with 356 additions and 297 deletions
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42
pie_chart.go
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@ -111,26 +111,13 @@ func (pc PieChart) drawCanvas(r Renderer, canvasBox Box) {
func (pc PieChart) drawTitle(r Renderer) {
if len(pc.Title) > 0 && pc.TitleStyle.Show {
r.SetFont(pc.TitleStyle.GetFont(pc.GetFont()))
r.SetFontColor(pc.TitleStyle.GetFontColor(DefaultTextColor))
titleFontSize := pc.TitleStyle.GetFontSize(DefaultTitleFontSize)
r.SetFontSize(titleFontSize)
textBox := r.MeasureText(pc.Title)
textWidth := textBox.Width()
textHeight := textBox.Height()
titleX := (pc.GetWidth() >> 1) - (textWidth >> 1)
titleY := pc.TitleStyle.Padding.GetTop(DefaultTitleTop) + textHeight
r.Text(pc.Title, titleX, titleY)
Draw.TextWithin(r, pc.Title, pc.Box(), pc.styleDefaultsTitle())
}
}
func (pc PieChart) drawSlices(r Renderer, canvasBox Box, values []Value) {
cx, cy := canvasBox.Center()
diameter := MinInt(canvasBox.Width(), canvasBox.Height())
diameter := Math.MinInt(canvasBox.Width(), canvasBox.Height())
radius := float64(diameter >> 1)
labelRadius := (radius * 2.0) / 3.0
@ -141,8 +128,8 @@ func (pc PieChart) drawSlices(r Renderer, canvasBox Box, values []Value) {
v.Style.InheritFrom(pc.stylePieChartValue(index)).WriteToRenderer(r)
r.MoveTo(cx, cy)
rads = PercentToRadians(total)
delta = PercentToRadians(v.Value)
rads = Math.PercentToRadians(total)
delta = Math.PercentToRadians(v.Value)
r.ArcTo(cx, cy, radius, radius, rads, delta)
@ -157,9 +144,9 @@ 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 = PercentToRadians(total + (v.Value / 2.0))
delta2 = RadianAdd(delta2, _pi2)
lx, ly = CirclePoint(cx, cy, labelRadius, delta2)
delta2 = Math.PercentToRadians(total + (v.Value / 2.0))
delta2 = Math.RadianAdd(delta2, _pi2)
lx, ly = Math.CirclePoint(cx, cy, labelRadius, delta2)
tb := r.MeasureText(v.Label)
lx = lx - (tb.Width() >> 1)
@ -180,7 +167,7 @@ func (pc PieChart) getDefaultCanvasBox() Box {
}
func (pc PieChart) getCircleAdjustedCanvasBox(canvasBox Box) Box {
circleDiameter := MinInt(canvasBox.Width(), canvasBox.Height())
circleDiameter := Math.MinInt(canvasBox.Width(), canvasBox.Height())
square := Box{
Right: circleDiameter,
@ -226,7 +213,7 @@ func (pc PieChart) stylePieChartValue(index int) Style {
}
func (pc PieChart) getScaledFontSize() float64 {
effectiveDimension := MinInt(pc.GetWidth(), pc.GetHeight())
effectiveDimension := Math.MinInt(pc.GetWidth(), pc.GetHeight())
if effectiveDimension >= 2048 {
return 48.0
} else if effectiveDimension >= 1024 {
@ -253,6 +240,17 @@ func (pc PieChart) styleDefaultsElements() Style {
}
}
func (pc PieChart) styleDefaultsTitle() Style {
return pc.TitleStyle.InheritFrom(Style{
FontColor: DefaultTextColor,
Font: pc.GetFont(),
FontSize: 24.0,
TextHorizontalAlign: TextHorizontalAlignCenter,
TextVerticalAlign: TextVerticalAlignTop,
TextWrap: TextWrapNone,
})
}
// Box returns the chart bounds as a box.
func (pc PieChart) Box() Box {
dpr := pc.Background.Padding.GetRight(DefaultBackgroundPadding.Right)