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package termui
import (
"strconv"
)
// Gauge is a progress bar like widget.
type Gauge struct {
*Block
Percent int
BarColor Color
PercentColor Color
Description string
}
// NewGauge return a new gauge with current theme.
func NewGauge() *Gauge {
return &Gauge{
Block: NewBlock(),
PercentColor: Theme.Fg,
BarColor: Theme.Bg,
}
}
// Buffer implements Bufferer interface.
func (g *Gauge) Buffer() *Buffer {
buf := g.Block.Buffer()
// plot bar
width := g.Percent * g.X / 100
for y := 1; y <= g.Y; y++ {
for x := 1; x <= width; x++ {
bg := g.BarColor
if bg == ColorDefault {
bg |= AttrReverse
}
buf.SetCell(x, y, Cell{' ', ColorDefault, bg})
}
}
// plot percentage
s := strconv.Itoa(g.Percent) + "%" + g.Description
y := (g.Y + 1) / 2
s = MaxString(s, g.X)
x := ((g.X - len(s)) + 1) / 2
for i, char := range s {
bg := g.Bg
if x+i < width {
bg = AttrReverse
}
buf.SetCell(1+x+i, y, Cell{char, g.PercentColor, bg})
}
return buf
}
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