color maps

defaults.go

@@ -1,12 +1,5 @@
 package chart
 
-import (
-	"sync"
-
-	"github.com/golang/freetype/truetype"
-	"github.com/wcharczuk/go-chart/drawing"
-)
-
 const (
 	// DefaultChartHeight is the default chart height.
 	DefaultChartHeight = 400
@@ -82,96 +75,6 @@ const (
 	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 (
 	// DashArrayDots is a dash array that represents '....' style stroke dashes.
 	DashArrayDots = []int{1, 1}
@@ -183,20 +86,6 @@ var (
 	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 (
 	// DefaultAnnotationPadding is the padding around an annotation.
 	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}
 )
 
-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 (
 	// ContentTypePNG is the png mime type.
 	ContentTypePNG = "image/png"