97 lines
2.1 KiB
Go
97 lines
2.1 KiB
Go
package termui
|
|
|
|
import "fmt"
|
|
|
|
type BarChart struct {
|
|
Block
|
|
BarColor Attribute
|
|
TextColor Attribute
|
|
NumColor Attribute
|
|
Data []int
|
|
DataLabels []string
|
|
BarWidth int
|
|
BarGap int
|
|
labels [][]rune
|
|
dataNum [][]rune
|
|
numBar int
|
|
scale float64
|
|
max int
|
|
}
|
|
|
|
func NewBarChart() *BarChart {
|
|
bc := &BarChart{Block: *NewBlock()}
|
|
bc.BarColor = ColorCyan
|
|
bc.NumColor = ColorWhite
|
|
bc.TextColor = ColorWhite
|
|
bc.BarGap = 1
|
|
bc.BarWidth = 3
|
|
return bc
|
|
}
|
|
|
|
func (bc *BarChart) layout() {
|
|
bc.numBar = bc.innerWidth / (bc.BarGap + bc.BarWidth)
|
|
bc.labels = make([][]rune, bc.numBar)
|
|
bc.dataNum = make([][]rune, len(bc.Data))
|
|
|
|
for i := 0; i < bc.numBar && i < len(bc.DataLabels) && i < len(bc.Data); i++ {
|
|
bc.labels[i] = trimStr2Runes(bc.DataLabels[i], bc.BarWidth)
|
|
n := bc.Data[i]
|
|
s := fmt.Sprint(n)
|
|
bc.dataNum[i] = trimStr2Runes(s, bc.BarWidth)
|
|
}
|
|
|
|
bc.max = bc.Data[0] // what if Data is nil?
|
|
for i := 0; i < len(bc.Data); i++ {
|
|
if bc.max < bc.Data[i] {
|
|
bc.max = bc.Data[i]
|
|
}
|
|
}
|
|
bc.scale = float64(bc.max) / float64(bc.innerHeight-1)
|
|
}
|
|
|
|
func (bc *BarChart) Buffer() []Point {
|
|
ps := bc.Block.Buffer()
|
|
bc.layout()
|
|
|
|
for i := 0; i < bc.numBar && i < len(bc.Data) && i < len(bc.DataLabels); i++ {
|
|
h := int(float64(bc.Data[i]) / bc.scale)
|
|
oftX := i * (bc.BarWidth + bc.BarGap)
|
|
// plot bar
|
|
for j := 0; j < bc.BarWidth; j++ {
|
|
for k := 0; k < h; k++ {
|
|
p := Point{}
|
|
p.Ch = ' '
|
|
p.Bg = bc.BarColor
|
|
p.X = bc.innerX + i*(bc.BarWidth+bc.BarGap) + j
|
|
p.Y = bc.innerY + bc.innerHeight - 2 - k
|
|
ps = append(ps, p)
|
|
}
|
|
}
|
|
// plot text
|
|
for j := 0; j < len(bc.labels[i]); j++ {
|
|
p := Point{}
|
|
p.Ch = bc.labels[i][j]
|
|
p.Bg = bc.BgColor
|
|
p.Fg = bc.TextColor
|
|
p.Y = bc.innerY + bc.innerHeight - 1
|
|
p.X = bc.innerX + oftX + j
|
|
ps = append(ps, p)
|
|
}
|
|
// plot num
|
|
for j := 0; j < len(bc.dataNum[i]); j++ {
|
|
p := Point{}
|
|
p.Ch = bc.dataNum[i][j]
|
|
p.Fg = bc.NumColor
|
|
p.Bg = bc.BarColor
|
|
if h == 0 {
|
|
p.Bg = bc.BgColor
|
|
}
|
|
p.X = bc.innerX + oftX + (bc.BarWidth-len(bc.dataNum[i]))/2 + j
|
|
p.Y = bc.innerY + bc.innerHeight - 2
|
|
ps = append(ps, p)
|
|
}
|
|
}
|
|
|
|
return ps
|
|
}
|