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