70 lines
1.6 KiB
Go
70 lines
1.6 KiB
Go
package chart
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/blendlabs/go-util"
|
|
)
|
|
|
|
// ContinuousSeries represents a line on a chart.
|
|
type ContinuousSeries struct {
|
|
Name string
|
|
Style Style
|
|
FinalValueLabel Style
|
|
|
|
XValues []float64
|
|
YValues []float64
|
|
}
|
|
|
|
// GetName returns the name of the time series.
|
|
func (cs ContinuousSeries) GetName() string {
|
|
return cs.Name
|
|
}
|
|
|
|
// GetStyle returns the line style.
|
|
func (cs ContinuousSeries) GetStyle() Style {
|
|
return cs.Style
|
|
}
|
|
|
|
// Len returns the number of elements in the series.
|
|
func (cs ContinuousSeries) Len() int {
|
|
return len(cs.XValues)
|
|
}
|
|
|
|
// GetValue gets a value at a given index.
|
|
func (cs ContinuousSeries) GetValue(index int) (float64, float64) {
|
|
return cs.XValues[index], cs.YValues[index]
|
|
}
|
|
|
|
// GetXFormatter returns the xs value formatter.
|
|
func (cs ContinuousSeries) GetXFormatter() Formatter {
|
|
return func(v interface{}) string {
|
|
if typed, isTyped := v.(float64); isTyped {
|
|
return fmt.Sprintf("%0.2f", typed)
|
|
}
|
|
return util.StringEmpty
|
|
}
|
|
}
|
|
|
|
// GetYFormatter returns the y value formatter.
|
|
func (cs ContinuousSeries) GetYFormatter() Formatter {
|
|
return cs.GetXFormatter()
|
|
}
|
|
|
|
// Render renders the series.
|
|
func (cs ContinuousSeries) Render(c *Chart, r Renderer, canvasBox Box, xrange, yrange Range) error {
|
|
DrawLineSeries(c, r, canvasBox, xrange, yrange, cs)
|
|
|
|
if cs.FinalValueLabel.Show {
|
|
asw := 0
|
|
if c.Axes.Show {
|
|
asw = int(c.Axes.GetStrokeWidth(DefaultAxisLineWidth))
|
|
}
|
|
|
|
_, lv := cs.GetValue(cs.Len() - 1)
|
|
ll := yrange.Format(lv)
|
|
lx := canvasBox.Right + asw
|
|
ly := yrange.Translate(lv) + canvasBox.Top
|
|
DrawAnnotation(c, r, canvasBox, xrange, yrange, cs.FinalValueLabel, lx, ly, ll)
|
|
}
|
|
}
|