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106 lines
2.6 KiB
Go
106 lines
2.6 KiB
Go
package main
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import (
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"github.com/nsf/termbox-go"
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)
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var curCol = 0
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var curRune = 0
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var backbuf []termbox.Cell
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var bbw, bbh int
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var runes = []rune{' ', '░', '▒', '▓', '█'}
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var colors = []termbox.Attribute{
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termbox.ColorBlack,
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termbox.ColorRed,
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termbox.ColorGreen,
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termbox.ColorYellow,
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termbox.ColorBlue,
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termbox.ColorMagenta,
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termbox.ColorCyan,
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termbox.ColorWhite,
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}
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type attrFunc func(int) (rune, termbox.Attribute, termbox.Attribute)
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func updateAndDrawButtons(current *int, x, y int, mx, my int, n int, attrf attrFunc) {
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lx, ly := x, y
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for i := 0; i < n; i++ {
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if lx <= mx && mx <= lx+3 && ly <= my && my <= ly+1 {
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*current = i
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}
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r, fg, bg := attrf(i)
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termbox.SetCell(lx+0, ly+0, r, fg, bg)
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termbox.SetCell(lx+1, ly+0, r, fg, bg)
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termbox.SetCell(lx+2, ly+0, r, fg, bg)
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termbox.SetCell(lx+3, ly+0, r, fg, bg)
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termbox.SetCell(lx+0, ly+1, r, fg, bg)
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termbox.SetCell(lx+1, ly+1, r, fg, bg)
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termbox.SetCell(lx+2, ly+1, r, fg, bg)
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termbox.SetCell(lx+3, ly+1, r, fg, bg)
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lx += 4
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}
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lx, ly = x, y
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for i := 0; i < n; i++ {
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if *current == i {
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fg := termbox.ColorRed | termbox.AttrBold
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bg := termbox.ColorDefault
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termbox.SetCell(lx+0, ly+2, '^', fg, bg)
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termbox.SetCell(lx+1, ly+2, '^', fg, bg)
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termbox.SetCell(lx+2, ly+2, '^', fg, bg)
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termbox.SetCell(lx+3, ly+2, '^', fg, bg)
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}
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lx += 4
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}
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}
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func update_and_redraw_all(mx, my int) {
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termbox.Clear(termbox.ColorDefault, termbox.ColorDefault)
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if mx != -1 && my != -1 {
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backbuf[bbw*my+mx] = termbox.Cell{Ch: runes[curRune], Fg: colors[curCol]}
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}
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copy(termbox.CellBuffer(), backbuf)
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_, h := termbox.Size()
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updateAndDrawButtons(&curRune, 0, 0, mx, my, len(runes), func(i int) (rune, termbox.Attribute, termbox.Attribute) {
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return runes[i], termbox.ColorDefault, termbox.ColorDefault
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})
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updateAndDrawButtons(&curCol, 0, h-3, mx, my, len(colors), func(i int) (rune, termbox.Attribute, termbox.Attribute) {
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return ' ', termbox.ColorDefault, colors[i]
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})
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termbox.Flush()
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}
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func reallocBackBuffer(w, h int) {
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bbw, bbh = w, h
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backbuf = make([]termbox.Cell, w*h)
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}
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func main() {
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err := termbox.Init()
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if err != nil {
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panic(err)
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}
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defer termbox.Close()
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termbox.SetInputMode(termbox.InputEsc | termbox.InputMouse)
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reallocBackBuffer(termbox.Size())
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update_and_redraw_all(-1, -1)
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mainloop:
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for {
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mx, my := -1, -1
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switch ev := termbox.PollEvent(); ev.Type {
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case termbox.EventKey:
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if ev.Key == termbox.KeyEsc {
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break mainloop
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}
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case termbox.EventMouse:
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if ev.Key == termbox.MouseLeft {
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mx, my = ev.MouseX, ev.MouseY
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}
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case termbox.EventResize:
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reallocBackBuffer(ev.Width, ev.Height)
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}
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update_and_redraw_all(mx, my)
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}
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}
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