termui/widget/gauge.go
gizak 7aed750f64 WIP use Buffer instead of []Point in Bufferer
Merge https://github.com/Matt3o12/termui.git colored-list
Merge https://github.com/funkygao/termui.git master
Add subdir widget
Use image Rectangle represent buffer area
2015-04-21 09:56:10 -04:00

68 lines
1.5 KiB
Go

// Copyright 2015 Zack Guo <gizak@icloud.com>. All rights reserved.
// Use of this source code is governed by a MIT license that can
// be found in the LICENSE file.
package widget
import "github.com/gizak/termui"
import "strconv"
// Gauge is a progress bar like widget.
// A simple example:
/*
g := termui.NewGauge()
g.Percent = 40
g.Width = 50
g.Height = 3
g.Border.Label = "Slim Gauge"
g.BarColor = termui.ColorRed
g.PercentColor = termui.ColorBlue
*/
type Gauge struct {
termui.Block
Percent int
BarColor termui.Attribute
PercentColor termui.Attribute
}
// NewGauge return a new gauge with current theme.
func NewGauge() *Gauge {
g := &Gauge{
Block: *termui.NewBlock(),
PercentColor: termui.Theme().GaugePercent,
BarColor: termui.Theme().GaugeBar}
g.Width = 12
g.Height = 3
return g
}
// Buffer implements Bufferer interface.
func (g *Gauge) Buffer() termui.Buffer {
buf := g.Block.Buffer()
inner := g.InnerBounds()
w := g.Percent * (inner.Dx() + 1) / 100
s := strconv.Itoa(g.Percent) + "%"
tx := termui.TextCells(s, g.PercentColor, g.Bg)
prx := inner.Min.X + (inner.Dx()+1)/2 - 1
pry := inner.Min.Y + (inner.Dy()+1)/2
// plot bar
for i := 0; i <= inner.Dy(); i++ {
for j := 0; j < w; j++ {
c := termui.Cell{' ', g.BarColor, g.BarColor}
buf.Set(inner.Min.X+j, inner.Min.Y+i, c)
}
}
// plot percentage
for i, v := range tx {
if w > (inner.Dx()+1)/2-1+i {
v.Bg = g.BarColor
}
buf.Set(prx+i, pry, v)
}
return buf
}