diff options
Diffstat (limited to 'termui/linegraph.go')
| -rw-r--r-- | termui/linegraph.go | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/termui/linegraph.go b/termui/linegraph.go index 1aebeb3..4b01691 100644 --- a/termui/linegraph.go +++ b/termui/linegraph.go @@ -7,7 +7,7 @@ import ( drawille "github.com/cjbassi/drawille-go" ) -// LineGraph implements a graph of data points. +// LineGraph implements a line graph of data points. type LineGraph struct { *Block Data map[string][]float64 @@ -27,17 +27,19 @@ func NewLineGraph() *LineGraph { } } -// renderPoints plots and interpolates data points. +// Buffer implements Bufferer interface. func (lc *LineGraph) Buffer() *Buffer { buf := lc.Block.Buffer() + // we render each data point on to the canvas then copy over the braille to the buffer at the end + // fyi braille characters have 2x4 dots for each character c := drawille.NewCanvas() - // used to keep track of colors but not write them to the buffer until the end + // used to keep track of the braille colors until the end when we render the braille to the buffer colors := make([][]Color, lc.X+2) for i := range colors { colors[i] = make([]Color, lc.Y+2) } - // Sort the series so that overlapping data will overlap the same way each time + // sort the series so that overlapping data will overlap the same way each time seriesList := make([]string, len(lc.Data)) i := 0 for seriesName := range lc.Data { @@ -46,7 +48,7 @@ func (lc *LineGraph) Buffer() *Buffer { } sort.Strings(seriesList) - // draw lines in reverse order so the first one is on top + // draw lines in reverse order so that the first color defined in the colorscheme is on top for i := len(seriesList) - 1; i >= 0; i-- { seriesName := seriesList[i] seriesData := lc.Data[seriesName] @@ -61,13 +63,12 @@ func (lc *LineGraph) Buffer() *Buffer { for i := len(seriesData) - 1; i >= 0; i-- { x := ((lc.X + 1) * 2) - 1 - (((len(seriesData) - 1) - i) * 5) y := ((lc.Y + 1) * 4) - 1 - int((float64((lc.Y)*4)-1)*(seriesData[i]/100)) - // stop rendering at the left-most wall - if x < 0 { + if x < 0 { // stop rendering at the left-most wall break } if lastY == -1 { // if this is the first point c.Set(x, y) - colors[x/2][y/4] = seriesLineColor // divide by 2 and 4 due to 2x4 dots in braille characters + colors[x/2][y/4] = seriesLineColor } else { c.DrawLine(lastX, lastY, x, y) for _, p := range drawille.Line(lastX, lastY, x, y) { @@ -91,14 +92,16 @@ func (lc *LineGraph) Buffer() *Buffer { } } + // renders key ontop for j, seriesName := range seriesList { + // sorts lines again seriesData := lc.Data[seriesName] seriesLineColor, ok := lc.LineColor[seriesName] if !ok { seriesLineColor = lc.DefaultLineColor } - // Render key ontop, but let braille be drawn between words + // render key ontop, but let braille be drawn over space characters str := fmt.Sprintf("%s %3.0f%%", seriesName, seriesData[len(seriesData)-1]) for k, char := range str { if char != ' ' { |