func main() {
stdscr, err := goncurses.Init()
if err != nil {
log.Fatal("init", err)
}
defer goncurses.End()
goncurses.Raw(true) // turn on raw "uncooked" input
goncurses.Echo(false) // turn echoing of typed characters off
goncurses.Cursor(0) // hide cursor
stdscr.Keypad(true) // allow keypad input
stdscr.Print("Press a key...")
stdscr.Refresh()
if ch := stdscr.GetChar(); ch == goncurses.KEY_F2 {
stdscr.Print("The F2 key was pressed.")
} else {
stdscr.Print("The key pressed is: ")
stdscr.AttrOn(goncurses.A_BOLD)
stdscr.AddChar(goncurses.Char(ch))
stdscr.AttrOff(goncurses.A_BOLD)
}
stdscr.Refresh()
stdscr.GetChar()
}
func main() {
scr, err := gc.Init()
if err != nil {
log.Fatal("init:", err)
}
defer gc.End()
gc.Echo(false)
scr.Println("Type characters to have them appear on the screen.")
scr.Println("Press 'q' to exit.")
scr.Println()
// Accept input concurrently via a goroutine and connect a channel
in := make(chan gc.Char)
ready := make(chan bool)
go func(w *gc.Window, ch chan<- gc.Char) {
for {
// Block until all write operations are complete
<-ready
// Send typed character down the channel (which is blocking
// in the main loop)
ch <- gc.Char(w.GetChar())
}
}(scr, in)
// Once a character has been received on the 'in' channel the
// 'ready' channel will block until it recieves another piece of data.
// This happens only once the received character has been written to
// the screen. The 'in' channel then blocks on the next loop until
// another 'true' is sent down the 'ready' channel signalling to the
// input goroutine that it's okay to receive input
for {
var c gc.Char
select {
case c = <-in: // blocks while waiting for input from goroutine
scr.Print(string(c))
scr.Refresh()
case ready <- true: // sends once above block completes
}
// Exit when 'q' is pressed
if c == gc.Char('q') {
break
}
}
}
func main() {
stdscr, err := gc.Init()
if err != nil {
log.Fatal("init:", err)
}
defer gc.End()
// HasColors can be used to determine whether the current terminal
// has the capability of using colours. You could then chose whether or
// not to use some other mechanism, like using A_REVERSE, instead
if !gc.HasColors() {
log.Fatal("Example requires a colour capable terminal")
}
// Must be called after Init but before using any colour related functions
if err := gc.StartColor(); err != nil {
log.Fatal(err)
}
gc.Echo(false)
// Initialize a colour pair. Should only fail if an improper pair value
// is given
if err := gc.InitPair(1, gc.C_RED, gc.C_WHITE); err != nil {
log.Fatal("InitPair failed: ", err)
}
gc.InitPair(2, gc.C_BLACK, gc.C_CYAN)
stdscr.Println("Type any key to proceed and again to exit")
// An example of trying to set an invalid color pair
err = gc.InitPair(-1, gc.C_BLACK, gc.C_CYAN)
stdscr.Println("An intentional error:", err)
stdscr.Keypad(true)
stdscr.MovePrint(12, 30, "Hello, World!!!")
stdscr.Refresh()
stdscr.GetChar()
// Note that background doesn't just accept colours but will fill
// any blank positions with the supplied character too. Note that newly
// added text with spaces in it will have the blanks converted to the fill
// character, if given
stdscr.SetBackground(gc.Char('*') | gc.ColorPair(2))
// ColorOn/Off is a shortcut to calling AttrOn/Off(gc.ColorPair(pair))
stdscr.ColorOn(1)
stdscr.MovePrint(13, 30, "Hello, World in Color!!!")
stdscr.ColorOff(1)
stdscr.Refresh()
stdscr.GetChar()
}