78 lines
1.6 KiB
Go
78 lines
1.6 KiB
Go
package tui
|
|
|
|
import (
|
|
"github.com/lixenwraith/terminal"
|
|
)
|
|
|
|
// ScrollBar draws vertical scrollbar track with thumb
|
|
func ScrollBar(r Region, x int, offset, visible, total int, fg terminal.RGB) {
|
|
if x < 0 || x >= r.W || r.H < 1 {
|
|
return
|
|
}
|
|
|
|
trackH := r.H
|
|
if total <= visible || trackH < 3 {
|
|
// No scrolling needed or track too small
|
|
for y := 0; y < trackH; y++ {
|
|
r.Cell(x, y, '│', fg, terminal.RGB{}, terminal.AttrDim)
|
|
}
|
|
return
|
|
}
|
|
|
|
// Calculate thumb size and position
|
|
thumbH := (visible * trackH) / total
|
|
if thumbH < 1 {
|
|
thumbH = 1
|
|
}
|
|
if thumbH > trackH {
|
|
thumbH = trackH
|
|
}
|
|
|
|
maxScroll := total - visible
|
|
thumbY := 0
|
|
if maxScroll > 0 {
|
|
thumbY = (offset * (trackH - thumbH)) / maxScroll
|
|
}
|
|
if thumbY < 0 {
|
|
thumbY = 0
|
|
}
|
|
if thumbY+thumbH > trackH {
|
|
thumbY = trackH - thumbH
|
|
}
|
|
|
|
// Draw track and thumb
|
|
for y := 0; y < trackH; y++ {
|
|
var ch rune
|
|
if y >= thumbY && y < thumbY+thumbH {
|
|
ch = '█'
|
|
} else {
|
|
ch = '░'
|
|
}
|
|
r.Cell(x, y, ch, fg, terminal.RGB{}, terminal.AttrNone)
|
|
}
|
|
}
|
|
|
|
// ScrollIndicator draws compact indicator text (Top/Bot/XX%)
|
|
func ScrollIndicator(r Region, y int, offset, visible, total int, fg terminal.RGB) {
|
|
if y < 0 || y >= r.H {
|
|
return
|
|
}
|
|
|
|
var text string
|
|
if total <= visible || offset <= 0 {
|
|
text = "Top"
|
|
} else if offset+visible >= total {
|
|
text = "Bot"
|
|
} else {
|
|
pct := ScrollPercent(offset, visible, total)
|
|
if pct >= 100 {
|
|
text = "99%"
|
|
} else if pct >= 10 {
|
|
text = string(rune('0'+pct/10)) + string(rune('0'+pct%10)) + "%"
|
|
} else {
|
|
text = " " + string(rune('0'+pct)) + "%"
|
|
}
|
|
}
|
|
|
|
r.TextRight(y, text, fg, terminal.RGB{}, terminal.AttrDim)
|
|
} |