go-chart/continuous_series.go
Will Charczuk 03708a90ef Helper API refactor (#40)
* api cleaup

* updates

* wtf

* updates

* snapshot.

* tweaks

* snapshot

* api tweaks.

* updates

* updates

* updates

* changes.

* updates

* updates

* sequence => seq

* dont need to use curl, just using wget

* fixing examples
2017-05-12 17:12:23 -07:00

81 lines
1.9 KiB
Go

package chart
import "fmt"
// ContinuousSeries represents a line on a chart.
type ContinuousSeries struct {
Name string
Style Style
YAxis YAxisType
XValueFormatter ValueFormatter
YValueFormatter ValueFormatter
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)
}
// GetValues gets the x,y values at a given index.
func (cs ContinuousSeries) GetValues(index int) (float64, float64) {
return cs.XValues[index], cs.YValues[index]
}
// GetLastValues gets the last x,y values.
func (cs ContinuousSeries) GetLastValues() (float64, float64) {
return cs.XValues[len(cs.XValues)-1], cs.YValues[len(cs.YValues)-1]
}
// GetValueFormatters returns value formatter defaults for the series.
func (cs ContinuousSeries) GetValueFormatters() (x, y ValueFormatter) {
if cs.XValueFormatter != nil {
x = cs.XValueFormatter
} else {
x = FloatValueFormatter
}
if cs.YValueFormatter != nil {
y = cs.YValueFormatter
} else {
y = FloatValueFormatter
}
return
}
// GetYAxis returns which YAxis the series draws on.
func (cs ContinuousSeries) GetYAxis() YAxisType {
return cs.YAxis
}
// Render renders the series.
func (cs ContinuousSeries) Render(r Renderer, canvasBox Box, xrange, yrange Range, defaults Style) {
style := cs.Style.InheritFrom(defaults)
Draw.LineSeries(r, canvasBox, xrange, yrange, style, cs)
}
// Validate validates the series.
func (cs ContinuousSeries) Validate() error {
if len(cs.XValues) == 0 {
return fmt.Errorf("continuous series must have xvalues set")
}
if len(cs.YValues) == 0 {
return fmt.Errorf("continuous series must have yvalues set")
}
return nil
}