go-chart/value_provider.go
2016-07-18 14:54:03 -07:00

36 lines
1.1 KiB
Go

package chart
// ValueProvider is a type that produces values.
type ValueProvider interface {
Len() int
GetValue(index int) (float64, float64)
}
// BoundedValueProvider allows series to return a range.
type BoundedValueProvider interface {
Len() int
GetBoundedValue(index int) (x, y1, y2 float64)
}
// LastValueProvider is a special type of value provider that can return it's (potentially computed) last value.
type LastValueProvider interface {
GetLastValue() (x, y float64)
}
// BoundedLastValueProvider is a special type of value provider that can return it's (potentially computed) bounded last value.
type BoundedLastValueProvider interface {
GetBoundedLastValue(index int) (x, y1, y2 float64)
}
// FullValueProvider is an interface that combines `ValueProvider` and `LastValueProvider`
type FullValueProvider interface {
ValueProvider
LastValueProvider
}
// FullBoundedValueProvider is an interface that combines `BoundedValueProvider` and `BoundedLastValueProvider`
type FullBoundedValueProvider interface {
BoundedValueProvider
BoundedLastValueProvider
}