diff options
Diffstat (limited to 'pkg/jp/linechart.go')
| -rw-r--r-- | pkg/jp/linechart.go | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/pkg/jp/linechart.go b/pkg/jp/linechart.go deleted file mode 100644 index 1849a1e..0000000 --- a/pkg/jp/linechart.go +++ /dev/null @@ -1,205 +0,0 @@ -package jp - -import ( - "math" - "strings" - - "github.com/sgreben/jp/pkg/jp/primitives" -) - -// Adapted from https://github.com/buger/goterm under the MIT License. - -/* -MIT License - -Copyright (c) 2016 Leonid Bugaev - -Permission is hereby granted, free of charge, to any person obtaining a copy -of this software and associated documentation files (the "Software"), to deal -in the Software without restriction, including without limitation the rights -to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -copies of the Software, and to permit persons to whom the Software is -furnished to do so, subject to the following conditions: - -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. - -*/ - -// LineChart is a line chart -type LineChart struct { - Buffer []string - Width int - Height int - Symbol string - chartHeight int - chartWidth int - paddingX int - paddingY int - - data *DataTable -} - -// NewLineChart returns a new line chart -func NewLineChart(width, height int) *LineChart { - chart := new(LineChart) - chart.Width = width - chart.Height = height - chart.Buffer = primitives.Buffer(width * height) - chart.Symbol = primitives.PointSymbolDefault - chart.paddingY = 2 - return chart -} - -func (c *LineChart) drawAxes(maxX, minX, maxY, minY float64, index int) { - c.drawLine(c.paddingX-1, 1, c.Width-1, 1, primitives.HorizontalLine) - c.drawLine(c.paddingX-1, 1, c.paddingX-1, c.Height-1, primitives.VerticalLine) - c.set(c.paddingX-1, c.paddingY-1, primitives.CornerBottomLeft) - - left := 0 // c.Width - c.paddingX + 1 - c.writeText(primitives.Ff(minY), left, 1) - - c.writeText(primitives.Ff(maxY), left, c.Height-1) - - c.writeText(primitives.Ff(minX), c.paddingX, 0) - - xCol := c.data.Columns[0] - c.writeText(c.data.Columns[0], c.Width/2-len(xCol)/2, 1) - - if len(c.data.Columns) < 3 { - col := c.data.Columns[index] - - for idx, char := range strings.Split(col, "") { - startFrom := c.Height/2 + len(col)/2 - idx - - c.writeText(char, c.paddingX-1, startFrom) - } - } - - c.writeText(primitives.Ff(maxX), c.Width-len(primitives.Ff(maxX)), 0) - -} - -func (c *LineChart) writeText(text string, x, y int) { - coord := y*c.Width + x - - for idx, char := range strings.Split(text, "") { - c.Buffer[coord+idx] = char - } -} - -// Draw implements Chart -func (c *LineChart) Draw(data *DataTable) (out string) { - var scaleY, scaleX float64 - - c.data = data - - charts := len(data.Columns) - 1 - - prevPoint := [2]int{-1, -1} - - maxX, minX, maxY, minY := getBoundaryValues(data, -1) - - c.paddingX = int(math.Max(float64(len(primitives.Ff(minY))), float64(len(primitives.Ff(maxY))))) + 1 - - c.chartHeight = c.Height - c.paddingY - c.chartWidth = c.Width - c.paddingX - 1 - - scaleX = float64(c.chartWidth) / (maxX - minX) - - scaleY = float64(c.chartHeight) / (maxY - minY) - - for i := 1; i < charts+1; i++ { - symbol := c.Symbol - - chartData := getChartData(data, i) - - for _, point := range chartData { - x := int((point[0]-minX)*scaleX) + c.paddingX - y := int((point[1])*scaleY) + c.paddingY - y = int((point[1]-minY)*scaleY) + c.paddingY - - if prevPoint[0] == -1 { - prevPoint[0] = x - prevPoint[1] = y - } - - if prevPoint[0] <= x { - c.drawLine(prevPoint[0], prevPoint[1], x, y, symbol) - } - - prevPoint[0] = x - prevPoint[1] = y - } - - c.drawAxes(maxX, minX, maxY, minY, i) - } - - for row := c.Height - 1; row >= 0; row-- { - out += strings.Join(c.Buffer[row*c.Width:(row+1)*c.Width], "") + "\n" - } - - return -} - -func (c *LineChart) set(x, y int, s string) { - coord := y*c.Width + x - if coord > 0 && coord < len(c.Buffer) { - c.Buffer[coord] = s - } -} - -func (c *LineChart) drawLine(x0, y0, x1, y1 int, symbol string) { - primitives.DrawLine(x0, y0, x1, y1, func(x, y int) { c.set(x, y, symbol) }) -} - -func getBoundaryValues(data *DataTable, index int) (maxX, minX, maxY, minY float64) { - maxX = math.Inf(-1) - minX = math.Inf(1) - maxY = math.Inf(-1) - minY = math.Inf(1) - - for _, r := range data.Rows { - maxX = math.Max(maxX, r[0]) - minX = math.Min(minX, r[0]) - - for idx, c := range r { - if idx > 0 { - if index == -1 || index == idx { - maxY = math.Max(maxY, c) - minY = math.Min(minY, c) - } - } - } - } - - if maxY > 0 { - maxY = maxY * 1.1 - } else { - maxY = maxY * 0.9 - } - - if minY > 0 { - minY = minY * 0.9 - } else { - minY = minY * 1.1 - } - - return -} - -func getChartData(data *DataTable, index int) (out [][]float64) { - for _, r := range data.Rows { - out = append(out, []float64{r[0], r[index]}) - } - - return -} |