94 lines
2.1 KiB
Go
94 lines
2.1 KiB
Go
package chart
|
|
|
|
import (
|
|
"fmt"
|
|
"time"
|
|
|
|
util "git.fireandbrimst.one/aw/go-chart/util"
|
|
)
|
|
|
|
// Interface Assertions.
|
|
var (
|
|
_ Series = (*TimeSeries)(nil)
|
|
_ FirstValuesProvider = (*TimeSeries)(nil)
|
|
_ LastValuesProvider = (*TimeSeries)(nil)
|
|
_ ValueFormatterProvider = (*TimeSeries)(nil)
|
|
)
|
|
|
|
// TimeSeries is a line on a chart.
|
|
type TimeSeries struct {
|
|
Name string
|
|
Style Style
|
|
|
|
YAxis YAxisType
|
|
|
|
XValues []time.Time
|
|
YValues []float64
|
|
}
|
|
|
|
// GetName returns the name of the time series.
|
|
func (ts TimeSeries) GetName() string {
|
|
return ts.Name
|
|
}
|
|
|
|
// GetStyle returns the line style.
|
|
func (ts TimeSeries) GetStyle() Style {
|
|
return ts.Style
|
|
}
|
|
|
|
// Len returns the number of elements in the series.
|
|
func (ts TimeSeries) Len() int {
|
|
return len(ts.XValues)
|
|
}
|
|
|
|
// GetValues gets x, y values at a given index.
|
|
func (ts TimeSeries) GetValues(index int) (x, y float64) {
|
|
x = util.Time.ToFloat64(ts.XValues[index])
|
|
y = ts.YValues[index]
|
|
return
|
|
}
|
|
|
|
// GetFirstValues gets the first values.
|
|
func (ts TimeSeries) GetFirstValues() (x, y float64) {
|
|
x = util.Time.ToFloat64(ts.XValues[0])
|
|
y = ts.YValues[0]
|
|
return
|
|
}
|
|
|
|
// GetLastValues gets the last values.
|
|
func (ts TimeSeries) GetLastValues() (x, y float64) {
|
|
x = util.Time.ToFloat64(ts.XValues[len(ts.XValues)-1])
|
|
y = ts.YValues[len(ts.YValues)-1]
|
|
return
|
|
}
|
|
|
|
// GetValueFormatters returns value formatter defaults for the series.
|
|
func (ts TimeSeries) GetValueFormatters() (x, y ValueFormatter) {
|
|
x = TimeValueFormatter
|
|
y = FloatValueFormatter
|
|
return
|
|
}
|
|
|
|
// GetYAxis returns which YAxis the series draws on.
|
|
func (ts TimeSeries) GetYAxis() YAxisType {
|
|
return ts.YAxis
|
|
}
|
|
|
|
// Render renders the series.
|
|
func (ts TimeSeries) Render(r Renderer, canvasBox Box, xrange, yrange Range, defaults Style) {
|
|
style := ts.Style.InheritFrom(defaults)
|
|
Draw.LineSeries(r, canvasBox, xrange, yrange, style, ts)
|
|
}
|
|
|
|
// Validate validates the series.
|
|
func (ts TimeSeries) Validate() error {
|
|
if len(ts.XValues) == 0 {
|
|
return fmt.Errorf("time series must have xvalues set")
|
|
}
|
|
|
|
if len(ts.YValues) == 0 {
|
|
return fmt.Errorf("time series must have yvalues set")
|
|
}
|
|
return nil
|
|
}
|