color maps
This commit is contained in:
parent
4f15ced303
commit
fdb1b191b2
11 changed files with 577 additions and 170 deletions
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@ -16,16 +16,17 @@ func drawChart(res http.ResponseWriter, req *http.Request) {
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Style: chart.Style{
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Style: chart.Style{
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Show: true,
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Show: true,
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StrokeWidth: chart.Disabled,
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StrokeWidth: chart.Disabled,
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DotWidth: 3,
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DotWidthProvider: func(rx, ry, x, y float64) float64 { return 10 * (y / ry) },
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DotColorProvider: chart.Vidris,
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},
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},
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XValues: chart.Sequence.Random(8192, 1024),
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XValues: chart.Sequence.Random(128, 1024),
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YValues: chart.Sequence.Random(8192, 1024),
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YValues: chart.Sequence.Random(128, 1024),
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},
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},
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},
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},
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}
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}
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res.Header().Set("Content-Type", chart.ContentTypeSVG)
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res.Header().Set("Content-Type", chart.ContentTypePNG)
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err := graph.Render(chart.SVG, res)
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err := graph.Render(chart.PNG, res)
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if err != nil {
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if err != nil {
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log.Println(err.Error())
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log.Println(err.Error())
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}
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}
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@ -49,8 +50,8 @@ func unit(res http.ResponseWriter, req *http.Request) {
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},
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},
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}
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}
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res.Header().Set("Content-Type", chart.ContentTypeSVG)
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res.Header().Set("Content-Type", chart.ContentTypePNG)
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err := graph.Render(chart.SVG, res)
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err := graph.Render(chart.PNG, res)
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if err != nil {
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if err != nil {
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log.Println(err.Error())
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log.Println(err.Error())
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}
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}
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24
bar_chart.go
24
bar_chart.go
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@ -14,6 +14,8 @@ type BarChart struct {
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Title string
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Title string
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TitleStyle Style
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TitleStyle Style
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ColorPalette ColorPalette
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Width int
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Width int
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Height int
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Height int
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DPI float64
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DPI float64
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@ -407,23 +409,23 @@ func (bc BarChart) getBackgroundStyle() Style {
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func (bc BarChart) styleDefaultsBackground() Style {
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func (bc BarChart) styleDefaultsBackground() Style {
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return Style{
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return Style{
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FillColor: DefaultBackgroundColor,
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FillColor: bc.GetColorPalette().BackgroundColor(),
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StrokeColor: DefaultBackgroundStrokeColor,
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StrokeColor: bc.GetColorPalette().BackgroundStrokeColor(),
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StrokeWidth: DefaultStrokeWidth,
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StrokeWidth: DefaultStrokeWidth,
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}
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}
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}
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}
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func (bc BarChart) styleDefaultsBar(index int) Style {
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func (bc BarChart) styleDefaultsBar(index int) Style {
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return Style{
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return Style{
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StrokeColor: GetAlternateColor(index),
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StrokeColor: bc.GetColorPalette().GetSeriesColor(index),
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StrokeWidth: 3.0,
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StrokeWidth: 3.0,
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FillColor: GetAlternateColor(index),
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FillColor: bc.GetColorPalette().GetSeriesColor(index),
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}
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}
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}
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}
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func (bc BarChart) styleDefaultsTitle() Style {
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func (bc BarChart) styleDefaultsTitle() Style {
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return bc.TitleStyle.InheritFrom(Style{
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return bc.TitleStyle.InheritFrom(Style{
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FontColor: DefaultTextColor,
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FontColor: bc.GetColorPalette().TextColor(),
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Font: bc.GetFont(),
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Font: bc.GetFont(),
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FontSize: bc.getTitleFontSize(),
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FontSize: bc.getTitleFontSize(),
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TextHorizontalAlign: TextHorizontalAlignCenter,
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TextHorizontalAlign: TextHorizontalAlignCenter,
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@ -448,10 +450,10 @@ func (bc BarChart) getTitleFontSize() float64 {
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func (bc BarChart) styleDefaultsAxes() Style {
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func (bc BarChart) styleDefaultsAxes() Style {
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return Style{
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return Style{
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StrokeColor: DefaultAxisColor,
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StrokeColor: bc.GetColorPalette().AxisStrokeColor(),
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Font: bc.GetFont(),
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Font: bc.GetFont(),
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FontSize: DefaultAxisFontSize,
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FontSize: DefaultAxisFontSize,
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FontColor: DefaultAxisColor,
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FontColor: bc.GetColorPalette().TextColor(),
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TextHorizontalAlign: TextHorizontalAlignCenter,
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TextHorizontalAlign: TextHorizontalAlignCenter,
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TextVerticalAlign: TextVerticalAlignTop,
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TextVerticalAlign: TextVerticalAlignTop,
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TextWrap: TextWrapWord,
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TextWrap: TextWrapWord,
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@ -463,3 +465,11 @@ func (bc BarChart) styleDefaultsElements() Style {
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Font: bc.GetFont(),
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Font: bc.GetFont(),
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}
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}
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}
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}
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// GetColorPalette returns the color palette for the chart.
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func (bc BarChart) GetColorPalette() ColorPalette {
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if bc.ColorPalette != nil {
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return bc.ColorPalette
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}
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return AlternateColorPalette
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}
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29
chart.go
29
chart.go
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@ -14,6 +14,8 @@ type Chart struct {
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Title string
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Title string
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TitleStyle Style
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TitleStyle Style
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ColorPalette ColorPalette
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Width int
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Width int
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Height int
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Height int
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DPI float64
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DPI float64
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@ -490,7 +492,7 @@ func (c Chart) drawSeries(r Renderer, canvasBox Box, xrange, yrange, yrangeAlt R
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func (c Chart) drawTitle(r Renderer) {
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func (c Chart) drawTitle(r Renderer) {
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if len(c.Title) > 0 && c.TitleStyle.Show {
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if len(c.Title) > 0 && c.TitleStyle.Show {
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r.SetFont(c.TitleStyle.GetFont(c.GetFont()))
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r.SetFont(c.TitleStyle.GetFont(c.GetFont()))
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r.SetFontColor(c.TitleStyle.GetFontColor(DefaultTextColor))
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r.SetFontColor(c.TitleStyle.GetFontColor(c.GetColorPalette().TextColor()))
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titleFontSize := c.TitleStyle.GetFontSize(DefaultTitleFontSize)
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titleFontSize := c.TitleStyle.GetFontSize(DefaultTitleFontSize)
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r.SetFontSize(titleFontSize)
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r.SetFontSize(titleFontSize)
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@ -508,25 +510,24 @@ func (c Chart) drawTitle(r Renderer) {
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func (c Chart) styleDefaultsBackground() Style {
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func (c Chart) styleDefaultsBackground() Style {
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return Style{
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return Style{
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FillColor: DefaultBackgroundColor,
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FillColor: c.GetColorPalette().BackgroundColor(),
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StrokeColor: DefaultBackgroundStrokeColor,
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StrokeColor: c.GetColorPalette().BackgroundStrokeColor(),
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StrokeWidth: DefaultBackgroundStrokeWidth,
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StrokeWidth: DefaultBackgroundStrokeWidth,
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}
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}
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}
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}
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func (c Chart) styleDefaultsCanvas() Style {
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func (c Chart) styleDefaultsCanvas() Style {
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return Style{
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return Style{
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FillColor: DefaultCanvasColor,
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FillColor: c.GetColorPalette().CanvasColor(),
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StrokeColor: DefaultCanvasStrokeColor,
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StrokeColor: c.GetColorPalette().CanvasStrokeColor(),
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StrokeWidth: DefaultCanvasStrokeWidth,
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StrokeWidth: DefaultCanvasStrokeWidth,
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}
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}
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}
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}
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func (c Chart) styleDefaultsSeries(seriesIndex int) Style {
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func (c Chart) styleDefaultsSeries(seriesIndex int) Style {
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strokeColor := GetDefaultColor(seriesIndex)
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return Style{
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return Style{
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DotColor: strokeColor,
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DotColor: c.GetColorPalette().GetSeriesColor(seriesIndex),
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StrokeColor: strokeColor,
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StrokeColor: c.GetColorPalette().GetSeriesColor(seriesIndex),
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StrokeWidth: DefaultSeriesLineWidth,
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StrokeWidth: DefaultSeriesLineWidth,
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Font: c.GetFont(),
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Font: c.GetFont(),
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FontSize: DefaultFontSize,
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FontSize: DefaultFontSize,
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@ -536,9 +537,9 @@ func (c Chart) styleDefaultsSeries(seriesIndex int) Style {
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func (c Chart) styleDefaultsAxes() Style {
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func (c Chart) styleDefaultsAxes() Style {
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return Style{
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return Style{
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Font: c.GetFont(),
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Font: c.GetFont(),
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FontColor: DefaultAxisColor,
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FontColor: c.GetColorPalette().TextColor(),
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FontSize: DefaultAxisFontSize,
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FontSize: DefaultAxisFontSize,
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StrokeColor: DefaultAxisColor,
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StrokeColor: c.GetColorPalette().AxisStrokeColor(),
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StrokeWidth: DefaultAxisLineWidth,
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StrokeWidth: DefaultAxisLineWidth,
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}
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}
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}
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}
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@ -549,6 +550,14 @@ func (c Chart) styleDefaultsElements() Style {
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}
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}
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}
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}
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// GetColorPalette returns the color palette for the chart.
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func (c Chart) GetColorPalette() ColorPalette {
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if c.ColorPalette != nil {
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return c.ColorPalette
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}
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return DefaultColorPalette
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}
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// Box returns the chart bounds as a box.
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// Box returns the chart bounds as a box.
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func (c Chart) Box() Box {
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func (c Chart) Box() Box {
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dpr := c.Background.Padding.GetRight(DefaultBackgroundPadding.Right)
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dpr := c.Background.Padding.GetRight(DefaultBackgroundPadding.Right)
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184
colors.go
Normal file
184
colors.go
Normal file
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@ -0,0 +1,184 @@
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package chart
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import "github.com/wcharczuk/go-chart/drawing"
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var (
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// ColorWhite is white.
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ColorWhite = drawing.Color{R: 255, G: 255, B: 255, A: 255}
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// ColorBlue is the basic theme blue color.
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ColorBlue = drawing.Color{R: 0, G: 116, B: 217, A: 255}
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// ColorCyan is the basic theme cyan color.
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ColorCyan = drawing.Color{R: 0, G: 217, B: 210, A: 255}
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// ColorGreen is the basic theme green color.
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ColorGreen = drawing.Color{R: 0, G: 217, B: 101, A: 255}
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// ColorRed is the basic theme red color.
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ColorRed = drawing.Color{R: 217, G: 0, B: 116, A: 255}
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// ColorOrange is the basic theme orange color.
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ColorOrange = drawing.Color{R: 217, G: 101, B: 0, A: 255}
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// ColorYellow is the basic theme yellow color.
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ColorYellow = drawing.Color{R: 217, G: 210, B: 0, A: 255}
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// ColorBlack is the basic theme black color.
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ColorBlack = drawing.Color{R: 51, G: 51, B: 51, A: 255}
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// ColorLightGray is the basic theme light gray color.
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ColorLightGray = drawing.Color{R: 239, G: 239, B: 239, A: 255}
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// ColorAlternateBlue is a alternate theme color.
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ColorAlternateBlue = drawing.Color{R: 106, G: 195, B: 203, A: 255}
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// ColorAlternateGreen is a alternate theme color.
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ColorAlternateGreen = drawing.Color{R: 42, G: 190, B: 137, A: 255}
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// ColorAlternateGray is a alternate theme color.
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ColorAlternateGray = drawing.Color{R: 110, G: 128, B: 139, A: 255}
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// ColorAlternateYellow is a alternate theme color.
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ColorAlternateYellow = drawing.Color{R: 240, G: 174, B: 90, A: 255}
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// ColorAlternateLightGray is a alternate theme color.
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ColorAlternateLightGray = drawing.Color{R: 187, G: 190, B: 191, A: 255}
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// ColorTransparent is a transparent (alpha zero) color.
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ColorTransparent = drawing.Color{R: 1, G: 1, B: 1, A: 0}
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)
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var (
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// DefaultBackgroundColor is the default chart background color.
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// It is equivalent to css color:white.
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DefaultBackgroundColor = ColorWhite
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// DefaultBackgroundStrokeColor is the default chart border color.
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// It is equivalent to color:white.
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DefaultBackgroundStrokeColor = ColorWhite
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// DefaultCanvasColor is the default chart canvas color.
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// It is equivalent to css color:white.
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DefaultCanvasColor = ColorWhite
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// DefaultCanvasStrokeColor is the default chart canvas stroke color.
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// It is equivalent to css color:white.
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DefaultCanvasStrokeColor = ColorWhite
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// DefaultTextColor is the default chart text color.
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// It is equivalent to #333333.
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DefaultTextColor = ColorBlack
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// DefaultAxisColor is the default chart axis line color.
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// It is equivalent to #333333.
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DefaultAxisColor = ColorBlack
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// DefaultStrokeColor is the default chart border color.
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// It is equivalent to #efefef.
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DefaultStrokeColor = ColorLightGray
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// DefaultFillColor is the default fill color.
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// It is equivalent to #0074d9.
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DefaultFillColor = ColorBlue
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// DefaultAnnotationFillColor is the default annotation background color.
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DefaultAnnotationFillColor = ColorWhite
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// DefaultGridLineColor is the default grid line color.
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DefaultGridLineColor = ColorLightGray
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)
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var (
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// DefaultColors are a couple default series colors.
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DefaultColors = []drawing.Color{
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ColorBlue,
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ColorGreen,
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ColorRed,
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ColorCyan,
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ColorOrange,
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}
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// DefaultAlternateColors are a couple alternate colors.
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DefaultAlternateColors = []drawing.Color{
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ColorAlternateBlue,
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ColorAlternateGreen,
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ColorAlternateGray,
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ColorAlternateYellow,
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ColorBlue,
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ColorGreen,
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ColorRed,
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ColorCyan,
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ColorOrange,
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}
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)
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// GetDefaultColor returns a color from the default list by index.
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// NOTE: the index will wrap around (using a modulo).
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func GetDefaultColor(index int) drawing.Color {
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finalIndex := index % len(DefaultColors)
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return DefaultColors[finalIndex]
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}
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// GetAlternateColor returns a color from the default list by index.
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// NOTE: the index will wrap around (using a modulo).
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func GetAlternateColor(index int) drawing.Color {
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finalIndex := index % len(DefaultAlternateColors)
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return DefaultAlternateColors[finalIndex]
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}
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// ColorPalette is a set of colors that.
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type ColorPalette interface {
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BackgroundColor() drawing.Color
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BackgroundStrokeColor() drawing.Color
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CanvasColor() drawing.Color
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CanvasStrokeColor() drawing.Color
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AxisStrokeColor() drawing.Color
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TextColor() drawing.Color
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GetSeriesColor(index int) drawing.Color
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}
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// DefaultColorPalette represents the default palatte.
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var DefaultColorPalette defaultColorPalette
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type defaultColorPalette struct{}
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func (dp defaultColorPalette) BackgroundColor() drawing.Color {
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return DefaultBackgroundColor
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}
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func (dp defaultColorPalette) BackgroundStrokeColor() drawing.Color {
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return DefaultBackgroundStrokeColor
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}
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func (dp defaultColorPalette) CanvasColor() drawing.Color {
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return DefaultCanvasColor
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}
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func (dp defaultColorPalette) CanvasStrokeColor() drawing.Color {
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return DefaultCanvasStrokeColor
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}
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func (dp defaultColorPalette) AxisStrokeColor() drawing.Color {
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return DefaultAxisColor
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}
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func (dp defaultColorPalette) TextColor() drawing.Color {
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return DefaultTextColor
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}
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func (dp defaultColorPalette) GetSeriesColor(index int) drawing.Color {
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return GetDefaultColor(index)
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}
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// AlternateColorPalette represents the default palatte.
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var AlternateColorPalette alternateColorPalette
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type alternateColorPalette struct{}
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func (ap alternateColorPalette) BackgroundColor() drawing.Color {
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return DefaultBackgroundColor
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}
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func (ap alternateColorPalette) BackgroundStrokeColor() drawing.Color {
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return DefaultBackgroundStrokeColor
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}
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func (ap alternateColorPalette) CanvasColor() drawing.Color {
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return DefaultCanvasColor
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}
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func (ap alternateColorPalette) CanvasStrokeColor() drawing.Color {
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return DefaultCanvasStrokeColor
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}
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func (ap alternateColorPalette) AxisStrokeColor() drawing.Color {
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return DefaultAxisColor
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}
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func (ap alternateColorPalette) TextColor() drawing.Color {
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return DefaultTextColor
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}
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func (ap alternateColorPalette) GetSeriesColor(index int) drawing.Color {
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return GetAlternateColor(index)
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}
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132
defaults.go
132
defaults.go
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@ -1,12 +1,5 @@
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package chart
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package chart
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import (
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"sync"
|
|
||||||
|
|
||||||
"github.com/golang/freetype/truetype"
|
|
||||||
"github.com/wcharczuk/go-chart/drawing"
|
|
||||||
)
|
|
||||||
|
|
||||||
const (
|
const (
|
||||||
// DefaultChartHeight is the default chart height.
|
// DefaultChartHeight is the default chart height.
|
||||||
DefaultChartHeight = 400
|
DefaultChartHeight = 400
|
||||||
|
@ -82,96 +75,6 @@ const (
|
||||||
DefaultBarWidth = 50
|
DefaultBarWidth = 50
|
||||||
)
|
)
|
||||||
|
|
||||||
var (
|
|
||||||
// ColorWhite is white.
|
|
||||||
ColorWhite = drawing.Color{R: 255, G: 255, B: 255, A: 255}
|
|
||||||
// ColorBlue is the basic theme blue color.
|
|
||||||
ColorBlue = drawing.Color{R: 0, G: 116, B: 217, A: 255}
|
|
||||||
// ColorCyan is the basic theme cyan color.
|
|
||||||
ColorCyan = drawing.Color{R: 0, G: 217, B: 210, A: 255}
|
|
||||||
// ColorGreen is the basic theme green color.
|
|
||||||
ColorGreen = drawing.Color{R: 0, G: 217, B: 101, A: 255}
|
|
||||||
// ColorRed is the basic theme red color.
|
|
||||||
ColorRed = drawing.Color{R: 217, G: 0, B: 116, A: 255}
|
|
||||||
// ColorOrange is the basic theme orange color.
|
|
||||||
ColorOrange = drawing.Color{R: 217, G: 101, B: 0, A: 255}
|
|
||||||
// ColorYellow is the basic theme yellow color.
|
|
||||||
ColorYellow = drawing.Color{R: 217, G: 210, B: 0, A: 255}
|
|
||||||
// ColorBlack is the basic theme black color.
|
|
||||||
ColorBlack = drawing.Color{R: 51, G: 51, B: 51, A: 255}
|
|
||||||
// ColorLightGray is the basic theme light gray color.
|
|
||||||
ColorLightGray = drawing.Color{R: 239, G: 239, B: 239, A: 255}
|
|
||||||
|
|
||||||
// ColorAlternateBlue is a alternate theme color.
|
|
||||||
ColorAlternateBlue = drawing.Color{R: 106, G: 195, B: 203, A: 255}
|
|
||||||
// ColorAlternateGreen is a alternate theme color.
|
|
||||||
ColorAlternateGreen = drawing.Color{R: 42, G: 190, B: 137, A: 255}
|
|
||||||
// ColorAlternateGray is a alternate theme color.
|
|
||||||
ColorAlternateGray = drawing.Color{R: 110, G: 128, B: 139, A: 255}
|
|
||||||
// ColorAlternateYellow is a alternate theme color.
|
|
||||||
ColorAlternateYellow = drawing.Color{R: 240, G: 174, B: 90, A: 255}
|
|
||||||
// ColorAlternateLightGray is a alternate theme color.
|
|
||||||
ColorAlternateLightGray = drawing.Color{R: 187, G: 190, B: 191, A: 255}
|
|
||||||
|
|
||||||
// ColorTransparent is a transparent (alpha zero) color.
|
|
||||||
ColorTransparent = drawing.Color{R: 1, G: 1, B: 1, A: 0}
|
|
||||||
)
|
|
||||||
|
|
||||||
var (
|
|
||||||
// DefaultBackgroundColor is the default chart background color.
|
|
||||||
// It is equivalent to css color:white.
|
|
||||||
DefaultBackgroundColor = ColorWhite
|
|
||||||
// DefaultBackgroundStrokeColor is the default chart border color.
|
|
||||||
// It is equivalent to color:white.
|
|
||||||
DefaultBackgroundStrokeColor = ColorWhite
|
|
||||||
// DefaultCanvasColor is the default chart canvas color.
|
|
||||||
// It is equivalent to css color:white.
|
|
||||||
DefaultCanvasColor = ColorWhite
|
|
||||||
// DefaultCanvasStrokeColor is the default chart canvas stroke color.
|
|
||||||
// It is equivalent to css color:white.
|
|
||||||
DefaultCanvasStrokeColor = ColorWhite
|
|
||||||
// DefaultTextColor is the default chart text color.
|
|
||||||
// It is equivalent to #333333.
|
|
||||||
DefaultTextColor = ColorBlack
|
|
||||||
// DefaultAxisColor is the default chart axis line color.
|
|
||||||
// It is equivalent to #333333.
|
|
||||||
DefaultAxisColor = ColorBlack
|
|
||||||
// DefaultStrokeColor is the default chart border color.
|
|
||||||
// It is equivalent to #efefef.
|
|
||||||
DefaultStrokeColor = ColorLightGray
|
|
||||||
// DefaultFillColor is the default fill color.
|
|
||||||
// It is equivalent to #0074d9.
|
|
||||||
DefaultFillColor = ColorBlue
|
|
||||||
// DefaultAnnotationFillColor is the default annotation background color.
|
|
||||||
DefaultAnnotationFillColor = ColorWhite
|
|
||||||
// DefaultGridLineColor is the default grid line color.
|
|
||||||
DefaultGridLineColor = ColorLightGray
|
|
||||||
)
|
|
||||||
|
|
||||||
var (
|
|
||||||
// DefaultColors are a couple default series colors.
|
|
||||||
DefaultColors = []drawing.Color{
|
|
||||||
ColorBlue,
|
|
||||||
ColorGreen,
|
|
||||||
ColorRed,
|
|
||||||
ColorCyan,
|
|
||||||
ColorOrange,
|
|
||||||
}
|
|
||||||
|
|
||||||
// DefaultAlternateColors are a couple alternate colors.
|
|
||||||
DefaultAlternateColors = []drawing.Color{
|
|
||||||
ColorAlternateBlue,
|
|
||||||
ColorAlternateGreen,
|
|
||||||
ColorAlternateGray,
|
|
||||||
ColorAlternateYellow,
|
|
||||||
ColorBlue,
|
|
||||||
ColorGreen,
|
|
||||||
ColorRed,
|
|
||||||
ColorCyan,
|
|
||||||
ColorOrange,
|
|
||||||
}
|
|
||||||
)
|
|
||||||
|
|
||||||
var (
|
var (
|
||||||
// DashArrayDots is a dash array that represents '....' style stroke dashes.
|
// DashArrayDots is a dash array that represents '....' style stroke dashes.
|
||||||
DashArrayDots = []int{1, 1}
|
DashArrayDots = []int{1, 1}
|
||||||
|
@ -183,20 +86,6 @@ var (
|
||||||
DashArrayDashesLarge = []int{10, 10}
|
DashArrayDashesLarge = []int{10, 10}
|
||||||
)
|
)
|
||||||
|
|
||||||
// GetDefaultColor returns a color from the default list by index.
|
|
||||||
// NOTE: the index will wrap around (using a modulo).
|
|
||||||
func GetDefaultColor(index int) drawing.Color {
|
|
||||||
finalIndex := index % len(DefaultColors)
|
|
||||||
return DefaultColors[finalIndex]
|
|
||||||
}
|
|
||||||
|
|
||||||
// GetAlternateColor returns a color from the default list by index.
|
|
||||||
// NOTE: the index will wrap around (using a modulo).
|
|
||||||
func GetAlternateColor(index int) drawing.Color {
|
|
||||||
finalIndex := index % len(DefaultAlternateColors)
|
|
||||||
return DefaultAlternateColors[finalIndex]
|
|
||||||
}
|
|
||||||
|
|
||||||
var (
|
var (
|
||||||
// DefaultAnnotationPadding is the padding around an annotation.
|
// DefaultAnnotationPadding is the padding around an annotation.
|
||||||
DefaultAnnotationPadding = Box{Top: 5, Left: 5, Right: 5, Bottom: 5}
|
DefaultAnnotationPadding = Box{Top: 5, Left: 5, Right: 5, Bottom: 5}
|
||||||
|
@ -205,27 +94,6 @@ var (
|
||||||
DefaultBackgroundPadding = Box{Top: 5, Left: 5, Right: 5, Bottom: 5}
|
DefaultBackgroundPadding = Box{Top: 5, Left: 5, Right: 5, Bottom: 5}
|
||||||
)
|
)
|
||||||
|
|
||||||
var (
|
|
||||||
_defaultFontLock sync.Mutex
|
|
||||||
_defaultFont *truetype.Font
|
|
||||||
)
|
|
||||||
|
|
||||||
// GetDefaultFont returns the default font (Roboto-Medium).
|
|
||||||
func GetDefaultFont() (*truetype.Font, error) {
|
|
||||||
if _defaultFont == nil {
|
|
||||||
_defaultFontLock.Lock()
|
|
||||||
defer _defaultFontLock.Unlock()
|
|
||||||
if _defaultFont == nil {
|
|
||||||
font, err := truetype.Parse(roboto)
|
|
||||||
if err != nil {
|
|
||||||
return nil, err
|
|
||||||
}
|
|
||||||
_defaultFont = font
|
|
||||||
}
|
|
||||||
}
|
|
||||||
return _defaultFont, nil
|
|
||||||
}
|
|
||||||
|
|
||||||
const (
|
const (
|
||||||
// ContentTypePNG is the png mime type.
|
// ContentTypePNG is the png mime type.
|
||||||
ContentTypePNG = "image/png"
|
ContentTypePNG = "image/png"
|
||||||
|
|
15
draw.go
15
draw.go
|
@ -56,15 +56,26 @@ func (d draw) LineSeries(r Renderer, canvasBox Box, xrange, yrange Range, style
|
||||||
}
|
}
|
||||||
|
|
||||||
if style.ShouldDrawDot() {
|
if style.ShouldDrawDot() {
|
||||||
dotWidth := style.GetDotWidth()
|
defaultDotWidth := style.GetDotWidth()
|
||||||
|
|
||||||
style.GetDotOptions().WriteDrawingOptionsToRenderer(r)
|
style.GetDotOptions().WriteDrawingOptionsToRenderer(r)
|
||||||
|
|
||||||
for i := 0; i < vs.Len(); i++ {
|
for i := 0; i < vs.Len(); i++ {
|
||||||
vx, vy = vs.GetValue(i)
|
vx, vy = vs.GetValue(i)
|
||||||
x = cl + xrange.Translate(vx)
|
x = cl + xrange.Translate(vx)
|
||||||
y = cb - yrange.Translate(vy)
|
y = cb - yrange.Translate(vy)
|
||||||
|
|
||||||
|
dotWidth := defaultDotWidth
|
||||||
|
if style.DotWidthProvider != nil {
|
||||||
|
dotWidth = style.DotWidthProvider(xrange.GetDelta(), yrange.GetDelta(), vx, vy)
|
||||||
|
}
|
||||||
|
|
||||||
|
if style.DotColorProvider != nil {
|
||||||
|
dotColor := style.DotColorProvider(xrange.GetDelta(), yrange.GetDelta(), vx, vy)
|
||||||
|
|
||||||
|
r.SetFillColor(dotColor)
|
||||||
|
r.SetStrokeColor(dotColor)
|
||||||
|
}
|
||||||
|
|
||||||
r.Circle(dotWidth, x, y)
|
r.Circle(dotWidth, x, y)
|
||||||
r.FillStroke()
|
r.FillStroke()
|
||||||
}
|
}
|
||||||
|
|
28
font.go
Normal file
28
font.go
Normal file
|
@ -0,0 +1,28 @@
|
||||||
|
package chart
|
||||||
|
|
||||||
|
import (
|
||||||
|
"sync"
|
||||||
|
|
||||||
|
"github.com/golang/freetype/truetype"
|
||||||
|
)
|
||||||
|
|
||||||
|
var (
|
||||||
|
_defaultFontLock sync.Mutex
|
||||||
|
_defaultFont *truetype.Font
|
||||||
|
)
|
||||||
|
|
||||||
|
// GetDefaultFont returns the default font (Roboto-Medium).
|
||||||
|
func GetDefaultFont() (*truetype.Font, error) {
|
||||||
|
if _defaultFont == nil {
|
||||||
|
_defaultFontLock.Lock()
|
||||||
|
defer _defaultFontLock.Unlock()
|
||||||
|
if _defaultFont == nil {
|
||||||
|
font, err := truetype.Parse(roboto)
|
||||||
|
if err != nil {
|
||||||
|
return nil, err
|
||||||
|
}
|
||||||
|
_defaultFont = font
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return _defaultFont, nil
|
||||||
|
}
|
28
pie_chart.go
28
pie_chart.go
|
@ -13,6 +13,8 @@ type PieChart struct {
|
||||||
Title string
|
Title string
|
||||||
TitleStyle Style
|
TitleStyle Style
|
||||||
|
|
||||||
|
ColorPalette ColorPalette
|
||||||
|
|
||||||
Width int
|
Width int
|
||||||
Height int
|
Height int
|
||||||
DPI float64
|
DPI float64
|
||||||
|
@ -195,17 +197,17 @@ func (pc PieChart) getCanvasStyle() Style {
|
||||||
|
|
||||||
func (pc PieChart) styleDefaultsCanvas() Style {
|
func (pc PieChart) styleDefaultsCanvas() Style {
|
||||||
return Style{
|
return Style{
|
||||||
FillColor: DefaultCanvasColor,
|
FillColor: pc.GetColorPalette().CanvasColor(),
|
||||||
StrokeColor: DefaultCanvasStrokeColor,
|
StrokeColor: pc.GetColorPalette().CanvasStrokeColor(),
|
||||||
StrokeWidth: DefaultStrokeWidth,
|
StrokeWidth: DefaultStrokeWidth,
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
func (pc PieChart) styleDefaultsPieChartValue() Style {
|
func (pc PieChart) styleDefaultsPieChartValue() Style {
|
||||||
return Style{
|
return Style{
|
||||||
StrokeColor: ColorWhite,
|
StrokeColor: pc.GetColorPalette().TextColor(),
|
||||||
StrokeWidth: 5.0,
|
StrokeWidth: 5.0,
|
||||||
FillColor: ColorWhite,
|
FillColor: pc.GetColorPalette().TextColor(),
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -213,9 +215,9 @@ func (pc PieChart) stylePieChartValue(index int) Style {
|
||||||
return pc.SliceStyle.InheritFrom(Style{
|
return pc.SliceStyle.InheritFrom(Style{
|
||||||
StrokeColor: ColorWhite,
|
StrokeColor: ColorWhite,
|
||||||
StrokeWidth: 5.0,
|
StrokeWidth: 5.0,
|
||||||
FillColor: GetAlternateColor(index),
|
FillColor: pc.GetColorPalette().GetSeriesColor(index),
|
||||||
FontSize: pc.getScaledFontSize(),
|
FontSize: pc.getScaledFontSize(),
|
||||||
FontColor: ColorWhite,
|
FontColor: pc.GetColorPalette().TextColor(),
|
||||||
Font: pc.GetFont(),
|
Font: pc.GetFont(),
|
||||||
})
|
})
|
||||||
}
|
}
|
||||||
|
@ -236,8 +238,8 @@ func (pc PieChart) getScaledFontSize() float64 {
|
||||||
|
|
||||||
func (pc PieChart) styleDefaultsBackground() Style {
|
func (pc PieChart) styleDefaultsBackground() Style {
|
||||||
return Style{
|
return Style{
|
||||||
FillColor: DefaultBackgroundColor,
|
FillColor: pc.GetColorPalette().BackgroundColor(),
|
||||||
StrokeColor: DefaultBackgroundStrokeColor,
|
StrokeColor: pc.GetColorPalette().BackgroundStrokeColor(),
|
||||||
StrokeWidth: DefaultStrokeWidth,
|
StrokeWidth: DefaultStrokeWidth,
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
@ -250,7 +252,7 @@ func (pc PieChart) styleDefaultsElements() Style {
|
||||||
|
|
||||||
func (pc PieChart) styleDefaultsTitle() Style {
|
func (pc PieChart) styleDefaultsTitle() Style {
|
||||||
return pc.TitleStyle.InheritFrom(Style{
|
return pc.TitleStyle.InheritFrom(Style{
|
||||||
FontColor: ColorWhite,
|
FontColor: pc.GetColorPalette().TextColor(),
|
||||||
Font: pc.GetFont(),
|
Font: pc.GetFont(),
|
||||||
FontSize: pc.getTitleFontSize(),
|
FontSize: pc.getTitleFontSize(),
|
||||||
TextHorizontalAlign: TextHorizontalAlignCenter,
|
TextHorizontalAlign: TextHorizontalAlignCenter,
|
||||||
|
@ -273,6 +275,14 @@ func (pc PieChart) getTitleFontSize() float64 {
|
||||||
return 10
|
return 10
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// GetColorPalette returns the color palette for the chart.
|
||||||
|
func (pc PieChart) GetColorPalette() ColorPalette {
|
||||||
|
if pc.ColorPalette != nil {
|
||||||
|
return pc.ColorPalette
|
||||||
|
}
|
||||||
|
return AlternateColorPalette
|
||||||
|
}
|
||||||
|
|
||||||
// Box returns the chart bounds as a box.
|
// Box returns the chart bounds as a box.
|
||||||
func (pc PieChart) Box() Box {
|
func (pc PieChart) Box() Box {
|
||||||
dpr := pc.Background.Padding.GetRight(DefaultBackgroundPadding.Right)
|
dpr := pc.Background.Padding.GetRight(DefaultBackgroundPadding.Right)
|
||||||
|
|
8
style.go
8
style.go
|
@ -45,6 +45,9 @@ type Style struct {
|
||||||
DotColor drawing.Color
|
DotColor drawing.Color
|
||||||
DotWidth float64
|
DotWidth float64
|
||||||
|
|
||||||
|
DotWidthProvider SizeProvider
|
||||||
|
DotColorProvider ColorProvider
|
||||||
|
|
||||||
FillColor drawing.Color
|
FillColor drawing.Color
|
||||||
|
|
||||||
FontSize float64
|
FontSize float64
|
||||||
|
@ -355,6 +358,9 @@ func (s Style) InheritFrom(defaults Style) (final Style) {
|
||||||
final.DotColor = s.GetDotColor(defaults.DotColor)
|
final.DotColor = s.GetDotColor(defaults.DotColor)
|
||||||
final.DotWidth = s.GetDotWidth(defaults.DotWidth)
|
final.DotWidth = s.GetDotWidth(defaults.DotWidth)
|
||||||
|
|
||||||
|
final.DotWidthProvider = s.DotWidthProvider
|
||||||
|
final.DotColorProvider = s.DotColorProvider
|
||||||
|
|
||||||
final.FillColor = s.GetFillColor(defaults.FillColor)
|
final.FillColor = s.GetFillColor(defaults.FillColor)
|
||||||
final.FontColor = s.GetFontColor(defaults.FontColor)
|
final.FontColor = s.GetFontColor(defaults.FontColor)
|
||||||
final.FontSize = s.GetFontSize(defaults.FontSize)
|
final.FontSize = s.GetFontSize(defaults.FontSize)
|
||||||
|
@ -426,7 +432,7 @@ func (s Style) ShouldDrawStroke() bool {
|
||||||
|
|
||||||
// ShouldDrawDot tells drawing functions if they should draw the dot.
|
// ShouldDrawDot tells drawing functions if they should draw the dot.
|
||||||
func (s Style) ShouldDrawDot() bool {
|
func (s Style) ShouldDrawDot() bool {
|
||||||
return !s.DotColor.IsZero() && s.DotWidth > 0
|
return (!s.DotColor.IsZero() && s.DotWidth > 0) || s.DotColorProvider != nil || s.DotWidthProvider != nil
|
||||||
}
|
}
|
||||||
|
|
||||||
// ShouldDrawFill tells drawing functions if they should draw the stroke.
|
// ShouldDrawFill tells drawing functions if they should draw the stroke.
|
||||||
|
|
|
@ -1,5 +1,7 @@
|
||||||
package chart
|
package chart
|
||||||
|
|
||||||
|
import "github.com/wcharczuk/go-chart/drawing"
|
||||||
|
|
||||||
// ValueProvider is a type that produces values.
|
// ValueProvider is a type that produces values.
|
||||||
type ValueProvider interface {
|
type ValueProvider interface {
|
||||||
Len() int
|
Len() int
|
||||||
|
@ -33,3 +35,9 @@ type FullBoundedValueProvider interface {
|
||||||
BoundedValueProvider
|
BoundedValueProvider
|
||||||
BoundedLastValueProvider
|
BoundedLastValueProvider
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// SizeProvider is a provider for integer size.
|
||||||
|
type SizeProvider func(rx, ry, x, y float64) float64
|
||||||
|
|
||||||
|
// ColorProvider is a provider for dot size.
|
||||||
|
type ColorProvider func(rx, ry, x, y float64) drawing.Color
|
||||||
|
|
272
vidris.go
Normal file
272
vidris.go
Normal file
|
@ -0,0 +1,272 @@
|
||||||
|
package chart
|
||||||
|
|
||||||
|
import "github.com/wcharczuk/go-chart/drawing"
|
||||||
|
|
||||||
|
func colorFromValues(r, g, b float64) drawing.Color {
|
||||||
|
return drawing.Color{R: uint8(r * 256), G: uint8(g * 256), B: uint8(b * 256), A: 255}
|
||||||
|
}
|
||||||
|
|
||||||
|
var vidrisColors = [256]drawing.Color{
|
||||||
|
colorFromValues(0.26700401, 0.00487433, 0.32941519),
|
||||||
|
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||||||
|
colorFromValues(0.72039115, 0.87035015, 0.16260273),
|
||||||
|
colorFromValues(0.73088902, 0.87191584, 0.15602894),
|
||||||
|
colorFromValues(0.74138803, 0.87344918, 0.14956101),
|
||||||
|
colorFromValues(0.75188414, 0.87495143, 0.14322828),
|
||||||
|
colorFromValues(0.76237342, 0.87642392, 0.13706449),
|
||||||
|
colorFromValues(0.77285183, 0.87786808, 0.13110864),
|
||||||
|
colorFromValues(0.78331535, 0.87928545, 0.12540538),
|
||||||
|
colorFromValues(0.79375994, 0.88067763, 0.12000532),
|
||||||
|
colorFromValues(0.80418159, 0.88204632, 0.11496505),
|
||||||
|
colorFromValues(0.81457634, 0.88339329, 0.11034678),
|
||||||
|
colorFromValues(0.82494028, 0.88472036, 0.10621724),
|
||||||
|
colorFromValues(0.83526959, 0.88602943, 0.1026459),
|
||||||
|
colorFromValues(0.84556056, 0.88732243, 0.09970219),
|
||||||
|
colorFromValues(0.8558096, 0.88860134, 0.09745186),
|
||||||
|
colorFromValues(0.86601325, 0.88986815, 0.09595277),
|
||||||
|
colorFromValues(0.87616824, 0.89112487, 0.09525046),
|
||||||
|
colorFromValues(0.88627146, 0.89237353, 0.09537439),
|
||||||
|
colorFromValues(0.89632002, 0.89361614, 0.09633538),
|
||||||
|
colorFromValues(0.90631121, 0.89485467, 0.09812496),
|
||||||
|
colorFromValues(0.91624212, 0.89609127, 0.1007168),
|
||||||
|
colorFromValues(0.92610579, 0.89732977, 0.10407067),
|
||||||
|
colorFromValues(0.93590444, 0.8985704, 0.10813094),
|
||||||
|
colorFromValues(0.94563626, 0.899815, 0.11283773),
|
||||||
|
colorFromValues(0.95529972, 0.90106534, 0.11812832),
|
||||||
|
colorFromValues(0.96489353, 0.90232311, 0.12394051),
|
||||||
|
colorFromValues(0.97441665, 0.90358991, 0.13021494),
|
||||||
|
colorFromValues(0.98386829, 0.90486726, 0.13689671),
|
||||||
|
colorFromValues(0.99324789, 0.90615657, 0.1439362),
|
||||||
|
}
|
||||||
|
|
||||||
|
// Vidris creates a vidris color map provider.
|
||||||
|
func Vidris(rx, ry, x, y float64) drawing.Color {
|
||||||
|
index := uint8((y / ry) * 256)
|
||||||
|
return vidrisColors[index]
|
||||||
|
}
|
Loading…
Reference in a new issue