47 lines
1.5 KiB
Go
47 lines
1.5 KiB
Go
package chart
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import "github.com/wcharczuk/go-chart/drawing"
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// ValueProvider is a type that produces values.
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type ValueProvider interface {
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Len() int
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GetValue(index int) (float64, float64)
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}
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// BoundedValueProvider allows series to return a range.
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type BoundedValueProvider interface {
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Len() int
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GetBoundedValue(index int) (x, y1, y2 float64)
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}
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// LastValueProvider is a special type of value provider that can return it's (potentially computed) last value.
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type LastValueProvider interface {
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GetLastValue() (x, y float64)
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}
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// BoundedLastValueProvider is a special type of value provider that can return it's (potentially computed) bounded last value.
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type BoundedLastValueProvider interface {
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GetBoundedLastValue() (x, y1, y2 float64)
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}
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// FullValueProvider is an interface that combines `ValueProvider` and `LastValueProvider`
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type FullValueProvider interface {
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ValueProvider
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LastValueProvider
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}
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// FullBoundedValueProvider is an interface that combines `BoundedValueProvider` and `BoundedLastValueProvider`
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type FullBoundedValueProvider interface {
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BoundedValueProvider
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BoundedLastValueProvider
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}
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// SizeProvider is a provider for integer size.
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type SizeProvider func(xrange, yrange Range, x, y float64) float64
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// ColorProvider is a general provider for color ranges based on values.
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type ColorProvider func(v, vmin, vmax float64) drawing.Color
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// DotColorProvider is a provider for dot color.
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type DotColorProvider func(xrange, yrange Range, x, y float64) drawing.Color
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