func main() {
// Initialize goncurses. It's essential End() is called to ensure the
// terminal isn't altered after the program ends
stdscr, err := goncurses.Init()
if err != nil {
log.Fatal("init", err)
}
defer goncurses.End()
// (Go)ncurses draws by cursor position and uses reverse cartisian
// coordinate system (y,x). Initially, the cursor is positioned at the
// coordinates 0,0 so the first call to Print will output the text at the
// top, left position of the screen since stdscr is a window which
// represents the terminal's screen size.
stdscr.Print("Hello, World!")
stdscr.MovePrint(3, 0, "Press any key to continue")
// Refresh() flushes output to the screen. Internally, it is the same as
// calling NoutRefresh() on the window followed by a call to Update()
stdscr.Refresh()
// GetChar will block execution until an input event, like typing a
// character on your keyboard, is received
stdscr.GetChar()
}
func main() {
stdscr, err := gc.Init()
if err != nil {
log.Fatal("init:", err)
}
defer gc.End()
msg := "Enter a string: "
row, col := stdscr.MaxYX()
row, col = (row/2)-1, (col-len(msg))/2
stdscr.MovePrint(row, col, msg)
/* GetString will only retieve the specified number of characters. Any
attempts by the user to enter more characters will elicit an audiable
beep */
var str string
str, err = stdscr.GetString(10)
if err != nil {
stdscr.MovePrint(row+1, col, "GetString Error:", err)
} else {
stdscr.MovePrintf(row+1, col, "You entered: %s", str)
}
stdscr.Refresh()
stdscr.GetChar()
}
func main() {
_, err := gc.Init()
if err != nil {
log.Fatal(err)
}
defer gc.End()
// create a new pad of 50 rows and 200 columns...
var pad *gc.Pad
pad, err = gc.NewPad(50, 200)
if err != nil {
log.Fatal(err)
}
// ...and fill it with some characters
for x := 0; x < 50; x++ {
pad.MovePrint(x, x, "This is a pad.")
}
// Refresh the pad to show only a portion of the pad. Understanding
// what these coordinates mean can be a bit tricky. The first two
// coordinates are the position in the pad, in this case 0,5 (remember
// the coordinates in ncurses are y,x). The second set of numbers are the
// coordinates on the screen on which to display the content, so row 5,
// column 10. The last set of numbers tell how high and how wide the
// rectangle to displayed should be, in this case 15 rows long and 25
// columns wide.
pad.Refresh(0, 5, 5, 10, 15, 25)
pad.GetChar()
}
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() {
stdscr, err := gc.Init()
if err != nil {
return
}
defer gc.End()
stdscr.Border(gc.ACS_VLINE, gc.ACS_VLINE, gc.ACS_HLINE, gc.ACS_HLINE,
gc.ACS_ULCORNER, gc.ACS_URCORNER, gc.ACS_LLCORNER, gc.ACS_LRCORNER)
stdscr.GetChar()
}
func main() {
stdscr, _ := gc.Init()
defer gc.End()
gc.StartColor()
gc.CBreak(true)
gc.Echo(true)
stdscr.Keypad(true)
stdscr.Print("Hit 'tab' to cycle through windows, 'q' to quit")
gc.InitPair(1, gc.C_RED, gc.C_BLACK)
gc.InitPair(2, gc.C_GREEN, gc.C_BLACK)
gc.InitPair(3, gc.C_BLUE, gc.C_BLACK)
gc.InitPair(4, gc.C_CYAN, gc.C_BLACK)
var panels [3]*gc.Panel
y, x := 4, 10
for i := 0; i < 3; i++ {
h, w := 10, 40
title := "Window Number %d"
window, _ := gc.NewWindow(h, w, y+(i*4), x+(i*10))
window.Box(0, 0)
window.MoveAddChar(2, 0, gc.ACS_LTEE)
window.HLine(2, 1, gc.ACS_HLINE, w-2)
window.MoveAddChar(2, w-1, gc.ACS_RTEE)
window.ColorOn(int16(i + 1))
window.MovePrintf(1, (w/2)-(len(title)/2), title, i+1)
window.ColorOff(int16(i + 1))
panels[i] = gc.NewPanel(window)
}
active := 2
for {
gc.UpdatePanels()
gc.Update()
switch stdscr.GetChar() {
case 'q':
return
case gc.KEY_TAB:
active += 1
if active > 2 {
active = 0
}
panels[active].Top()
}
}
}
func ExampleInit() {
// You should always test to make sure ncurses has initialized properly.
// In order for your error messages to be visible on the terminal you will
// need to either log error messages or output them to to stderr.
stdscr, err := goncurses.Init()
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
defer goncurses.End()
stdscr.Print("Press enter to continue...")
stdscr.Refresh()
}
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()
}
func main() {
stdscr, err := gc.Init()
if err != nil {
log.Fatal(err)
}
defer gc.End()
gc.Cursor(0)
gc.Echo(false)
stdscr.Print("A reversed plus-minus symbol: ")
stdscr.AddChar(gc.ACS_PLMINUS | gc.A_REVERSE)
stdscr.Refresh()
stdscr.GetChar()
}
func main() {
stdscr, err := gc.Init()
if err != nil {
log.Fatal(err)
}
defer gc.End()
gc.StartColor()
gc.Echo(false)
gc.Raw(true)
var colours = []int16{gc.C_BLACK, gc.C_BLUE, gc.C_CYAN, gc.C_GREEN,
gc.C_MAGENTA, gc.C_RED, gc.C_WHITE, gc.C_YELLOW}
var attributes = []struct {
attr gc.Char
text string
}{
{gc.A_NORMAL, "normal"},
{gc.A_STANDOUT, "standout"},
{gc.A_UNDERLINE | gc.A_BOLD, "underline"},
{gc.A_REVERSE, "reverse"},
{gc.A_BLINK, "blink"},
{gc.A_DIM, "dim"},
{gc.A_BOLD, "bold"},
}
stdscr.MovePrint(0, 0, "Normal terminal colors: ")
for i, c := range colours {
gc.InitPair(int16(i), c, c)
stdscr.ColorOn(int16(i))
stdscr.AddChar(' ')
stdscr.ColorOff(int16(i))
}
stdscr.MovePrint(1, 0, "Bold terminal colors: ")
stdscr.AttrOn(gc.A_BLINK)
for i, _ := range colours {
stdscr.ColorOn(int16(i))
stdscr.AddChar(' ')
stdscr.ColorOff(int16(i))
}
stdscr.AttrOff(gc.A_BLINK)
stdscr.Move(2, 0)
for _, a := range attributes {
stdscr.AttrOn(a.attr)
stdscr.Println(a.text)
stdscr.AttrOff(a.attr)
}
stdscr.GetChar()
}
func main() {
stdscr, _ := gc.Init()
defer gc.End()
row, col := stdscr.MaxYX()
msg := "Just a string "
stdscr.MovePrint(row/2, (col-len(msg))/2, msg)
stdscr.MovePrintf(row-3, 0, "This screen has %d rows and %d columns. ",
row, col)
stdscr.Println()
stdscr.Print("Try resizing your terminal window and then " +
"run this program again.")
stdscr.Refresh()
stdscr.GetChar()
}
func main() {
stdscr, err := goncurses.Init()
if err != nil {
log.Fatal("init:", err)
}
defer goncurses.End()
goncurses.Raw(true)
goncurses.Echo(false)
goncurses.Cursor(0)
stdscr.Clear()
stdscr.Keypad(true)
menu_items := []string{"Choice 1", "Choice 2", "Choice 3", "Choice 4",
"Exit"}
items := make([]*goncurses.MenuItem, len(menu_items))
for i, val := range menu_items {
items[i], _ = goncurses.NewItem(val, "")
defer items[i].Free()
}
menu, err := goncurses.NewMenu(items)
if err != nil {
stdscr.Print(err)
return
}
defer menu.Free()
menu.Post()
stdscr.MovePrint(20, 0, "'q' to exit")
stdscr.Refresh()
for {
goncurses.Update()
ch := stdscr.GetChar()
switch goncurses.KeyString(ch) {
case "q":
return
case "down":
menu.Driver(goncurses.REQ_DOWN)
case "up":
menu.Driver(goncurses.REQ_UP)
}
}
}
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, _ := gc.Init()
defer gc.End()
var panels [3]*gc.Panel
y, x := 2, 4
for i := 0; i < 3; i++ {
window, _ := gc.NewWindow(10, 40, y+i, x+(i*5))
window.Box(0, 0)
panels[i] = gc.NewPanel(window)
}
gc.UpdatePanels()
gc.Update()
stdscr.GetChar()
}
func main() {
gc.SlkInit(gc.SLK_323)
scr, err := gc.Init()
if err != nil {
log.Fatal("INIT:", err)
}
defer gc.End()
gc.StartColor()
gc.InitPair(SOFTKEYS, gc.C_YELLOW, gc.C_BLUE)
scr.Print("Type any key to exit...")
labels := [...]string{"ONE", "TWO", "THREE", "FOUR", "FIVE", "SIX", "SEVEN",
"EIGHT"}
for i := range labels {
gc.SlkSet(i+1, labels[i], gc.SLK_CENTER)
}
gc.SlkColor(SOFTKEYS)
gc.SlkNoutRefresh()
scr.Refresh()
scr.GetChar()
}
func main() {
stdscr, _ := gc.Init()
defer gc.End()
gc.StartColor()
gc.Raw(true)
gc.Echo(false)
gc.Cursor(0)
stdscr.Keypad(true)
gc.InitPair(1, gc.C_RED, gc.C_BLACK)
gc.InitPair(2, gc.C_CYAN, gc.C_BLACK)
// build the menu items
menu_items := []string{
"Choice 1",
"Choice 2",
"Choice 3",
"Choice 4",
"Choice 5",
"Choice 6",
"Choice 7",
"Choice 8",
"Choice 9",
"Choice 10",
"Exit"}
items := make([]*gc.MenuItem, len(menu_items))
for i, val := range menu_items {
items[i], _ = gc.NewItem(val, "")
defer items[i].Free()
}
// create the menu
menu, _ := gc.NewMenu(items)
defer menu.Free()
menuwin, _ := gc.NewWindow(HEIGHT, WIDTH, 4, 14)
menuwin.Keypad(true)
menu.SetWindow(menuwin)
dwin := menuwin.Derived(6, 38, 3, 1)
menu.SubWindow(dwin)
menu.Format(5, 1)
menu.Mark(" * ")
// Print centered menu title
title := "My Menu"
menuwin.Box(0, 0)
menuwin.ColorOn(1)
menuwin.MovePrint(1, (WIDTH/2)-(len(title)/2), title)
menuwin.ColorOff(1)
menuwin.MoveAddChar(2, 0, gc.ACS_LTEE)
menuwin.HLine(2, 1, gc.ACS_HLINE, WIDTH-2)
menuwin.MoveAddChar(2, WIDTH-1, gc.ACS_RTEE)
y, _ := stdscr.MaxYX()
stdscr.ColorOn(2)
stdscr.MovePrint(y-3, 1,
"Use up/down arrows or page up/down to navigate. 'q' to exit")
stdscr.ColorOff(2)
stdscr.Refresh()
menu.Post()
defer menu.UnPost()
menuwin.Refresh()
for {
gc.Update()
if ch := menuwin.GetChar(); ch == 'q' {
return
} else {
menu.Driver(gc.DriverActions[ch])
}
}
}
func main() {
f, err := os.Create("err.log")
if err != nil {
log.Fatal(err)
}
defer f.Close()
log.SetOutput(f)
var stdscr *gc.Window
stdscr, err = gc.Init()
if err != nil {
log.Println("Init:", err)
}
defer gc.End()
rand.Seed(time.Now().Unix())
gc.StartColor()
gc.Cursor(0)
gc.Echo(false)
gc.HalfDelay(1)
gc.InitPair(1, gc.C_WHITE, gc.C_BLACK)
gc.InitPair(2, gc.C_YELLOW, gc.C_BLACK)
gc.InitPair(3, gc.C_MAGENTA, gc.C_BLACK)
gc.InitPair(4, gc.C_RED, gc.C_BLACK)
gc.InitPair(5, gc.C_BLUE, gc.C_BLACK)
gc.InitPair(6, gc.C_GREEN, gc.C_BLACK)
lines, cols := stdscr.MaxYX()
pl, pc := lines, cols*3
ship := newShip(lines/2, 5)
objects = append(objects, ship)
field := genStarfield(pl, pc)
text := stdscr.Duplicate()
c := time.NewTicker(time.Second / 2)
c2 := time.NewTicker(time.Second / 16)
px := 0
loop:
for {
text.MovePrintf(0, 0, "Life: [%-5s]", lifeToText(ship.life))
stdscr.Erase()
stdscr.Copy(field.Window, 0, px, 0, 0, lines-1, cols-1, true)
drawObjects(stdscr)
stdscr.Overlay(text)
stdscr.Refresh()
select {
case <-c.C:
spawnAsteroid(stdscr.MaxYX())
if px+cols >= pc {
break loop
}
px++
case <-c2.C:
updateObjects(stdscr.MaxYX())
drawObjects(stdscr)
default:
if !handleInput(stdscr, ship) || ship.Expired(-1, -1) {
break loop
}
}
}
msg := "Game Over"
end, err := gc.NewWindow(5, len(msg)+4, (lines/2)-2, (cols-len(msg))/2)
if err != nil {
log.Fatal("game over:", err)
}
end.MovePrint(2, 2, msg)
end.Box(gc.ACS_VLINE, gc.ACS_HLINE)
end.Refresh()
gc.Nap(2000)
}
func main() {
stdscr, err := gc.Init()
if err != nil {
log.Fatal(err)
}
defer gc.End()
// Turn off character echo, hide the cursor and disable input buffering
gc.Echo(false)
gc.CBreak(true)
gc.Cursor(0)
stdscr.Print("Use arrow keys to move the window. Press 'q' to exit")
stdscr.NoutRefresh()
// Determine the center of the screen and offset those coordinates by
// half of the window size we are about to create. These coordinates will
// be used to move our window around the screen
rows, cols := stdscr.MaxYX()
height, width := 5, 10
y, x := (rows-height)/2, (cols-width)/2
// Create a new window centered on the screen and enable the use of the
// keypad on it so the arrow keys are available
var win *gc.Window
win, err = gc.NewWindow(height, width, y, x)
if err != nil {
log.Fatal(err)
}
win.Keypad(true)
main:
for {
// Clear the section of screen where the box is currently located so
// that it is blanked by calling Erase on the window and refreshing it
// so that the chances are sent to the virtual screen but not actually
// output to the terminal
win.Erase()
win.NoutRefresh()
// Move the window to it's new location (if any) and redraw it
win.MoveWindow(y, x)
win.Box(gc.ACS_VLINE, gc.ACS_HLINE)
win.NoutRefresh()
// Update will flush only the characters which have changed between the
// physical screen and the virtual screen, minimizing the number of
// characters which must be sent
gc.Update()
// In order for the window to display correctly, we must call GetChar()
// on it rather than stdscr
switch win.GetChar() {
case 'q':
break main
case gc.KEY_LEFT:
if x > 0 {
x--
}
case gc.KEY_RIGHT:
if x < cols-width {
x++
}
case gc.KEY_UP:
if y > 1 {
y--
}
case gc.KEY_DOWN:
if y < rows-height {
y++
}
}
}
win.Delete()
}
func main() {
stdscr, _ := gc.Init()
defer gc.End()
gc.Echo(false)
gc.CBreak(true)
gc.StartColor()
stdscr.Keypad(true)
gc.InitPair(1, gc.C_WHITE, gc.C_BLUE)
gc.InitPair(2, gc.C_YELLOW, gc.C_BLUE)
fields := make([]*gc.Field, 2)
fields[0], _ = gc.NewField(1, 10, 4, 18, 0, 0)
defer fields[0].Free()
fields[0].SetForeground(gc.ColorPair(1))
fields[0].SetBackground(gc.ColorPair(2) | gc.A_UNDERLINE | gc.A_BOLD)
fields[0].SetOptionsOff(gc.FO_AUTOSKIP)
fields[1], _ = gc.NewField(1, 10, 6, 18, 0, 0)
defer fields[1].Free()
fields[1].SetForeground(gc.ColorPair(1))
fields[1].SetBackground(gc.A_UNDERLINE)
fields[1].SetOptionsOff(gc.FO_AUTOSKIP)
fields[1].SetPad('*')
form, _ := gc.NewForm(fields)
form.Post()
defer form.UnPost()
defer form.Free()
stdscr.Refresh()
fields[0].SetBuffer("Buffer 0")
stdscr.AttrOn(gc.ColorPair(2) | gc.A_BOLD)
stdscr.MovePrint(4, 10, "Value 1:")
stdscr.AttrOff(gc.ColorPair(2) | gc.A_BOLD)
stdscr.MovePrint(6, 10, "Value 2:")
stdscr.Refresh()
form.Driver(gc.REQ_FIRST_FIELD)
ch := stdscr.GetChar()
for ch != 'q' {
switch ch {
case gc.KEY_DOWN, gc.KEY_TAB:
form.Driver(gc.REQ_NEXT_FIELD)
form.Driver(gc.REQ_END_LINE)
case gc.KEY_UP:
form.Driver(gc.REQ_PREV_FIELD)
form.Driver(gc.REQ_END_LINE)
case gc.KEY_BACKSPACE:
form.Driver(gc.REQ_CLR_FIELD)
default:
form.Driver(ch)
}
ch = stdscr.GetChar()
}
stdscr.MovePrint(20, 0, fields[1].Buffer())
stdscr.GetChar()
}
func main() {
stdscr, err := gc.Init()
if err != nil {
log.Fatal("init:", err)
}
defer gc.End()
gc.StartColor()
gc.Raw(true)
gc.Echo(false)
gc.Cursor(0)
stdscr.Keypad(true)
gc.InitPair(1, gc.C_RED, gc.C_BLACK)
gc.InitPair(2, gc.C_GREEN, gc.C_BLACK)
gc.InitPair(3, gc.C_MAGENTA, gc.C_BLACK)
// build the menu items
menu_items := []string{
"Choice 1",
"Choice 2",
"Choice 3",
"Choice 4",
"Choice 5",
"Exit"}
items := make([]*gc.MenuItem, len(menu_items))
for i, val := range menu_items {
items[i], _ = gc.NewItem(val, "")
defer items[i].Free()
if i == 2 || i == 4 {
items[i].Selectable(false)
}
}
// create the menu
menu, _ := gc.NewMenu(items)
defer menu.Free()
y, _ := stdscr.MaxYX()
stdscr.MovePrint(y-3, 0, "Use up/down arrows to move; 'q' to exit")
stdscr.Refresh()
menu.SetForeground(gc.ColorPair(1) | gc.A_REVERSE)
menu.SetBackground(gc.ColorPair(2) | gc.A_BOLD)
menu.Grey(gc.ColorPair(3) | gc.A_BOLD)
menu.Post()
defer menu.UnPost()
for {
gc.Update()
ch := stdscr.GetChar()
switch ch {
case ' ':
menu.Driver(gc.REQ_TOGGLE)
case 'q':
return
case gc.KEY_RETURN:
stdscr.Move(20, 0)
stdscr.ClearToEOL()
stdscr.Printf("Item selected is: %s", menu.Current(nil).Name())
menu.PositionCursor()
default:
menu.Driver(gc.DriverActions[ch])
}
}
}
func main() {
stdscr, _ := gc.Init()
defer gc.End()
gc.StartColor()
gc.Raw(true)
gc.Echo(false)
gc.Cursor(0)
stdscr.Keypad(true)
// build the menu items
menu_items := []string{
"Choice 1",
"Choice 2",
"Choice 3",
"Choice 4",
"Choice 5",
"Choice 6",
"Choice 7",
"Exit"}
items := make([]*gc.MenuItem, len(menu_items))
for i, val := range menu_items {
items[i], _ = gc.NewItem(val, "")
defer items[i].Free()
}
// create the menu
menu, _ := gc.NewMenu(items)
defer menu.Free()
menu.Option(gc.O_ONEVALUE, false)
y, _ := stdscr.MaxYX()
stdscr.MovePrint(y-3, 0, "Use up/down arrows to move, spacebar to "+
"toggle and enter to print. 'q' to exit")
stdscr.Refresh()
menu.Post()
defer menu.UnPost()
for {
gc.Update()
ch := stdscr.GetChar()
switch ch {
case 'q':
return
case ' ':
menu.Driver(gc.REQ_TOGGLE)
case gc.KEY_RETURN, gc.KEY_ENTER:
var list string
for _, item := range menu.Items() {
if item.Value() {
list += "\"" + item.Name() + "\" "
}
}
stdscr.Move(20, 0)
stdscr.ClearToEOL()
stdscr.MovePrint(20, 0, list)
stdscr.Refresh()
default:
menu.Driver(gc.DriverActions[ch])
}
}
}
func main() {
stdscr, _ := gc.Init()
defer gc.End()
gc.StartColor()
gc.Raw(true)
gc.Echo(false)
gc.Cursor(0)
stdscr.Keypad(true)
gc.InitPair(1, gc.C_RED, gc.C_BLACK)
// build the menu items
menu_items := []string{"Choice 1", "Choice 2", "Choice 3", "Choice 4",
"Exit"}
items := make([]*gc.MenuItem, len(menu_items))
for i, val := range menu_items {
items[i], _ = gc.NewItem(val, "")
defer items[i].Free()
}
// create the menu
menu, _ := gc.NewMenu(items)
defer menu.Free()
menuwin, _ := gc.NewWindow(10, 40, 4, 14)
menuwin.Keypad(true)
menu.SetWindow(menuwin)
dwin := menuwin.Derived(6, 38, 3, 1)
menu.SubWindow(dwin)
menu.Mark(" * ")
// Print centered menu title
y, x := menuwin.MaxYX()
title := "My Menu"
menuwin.Box(0, 0)
menuwin.ColorOn(1)
menuwin.MovePrint(1, (x/2)-(len(title)/2), title)
menuwin.ColorOff(1)
menuwin.MoveAddChar(2, 0, gc.ACS_LTEE)
menuwin.HLine(2, 1, gc.ACS_HLINE, x-3)
menuwin.MoveAddChar(2, x-2, gc.ACS_RTEE)
y, x = stdscr.MaxYX()
stdscr.MovePrint(y-2, 1, "'q' to exit")
stdscr.Refresh()
menu.Post()
defer menu.UnPost()
menuwin.Refresh()
for {
gc.Update()
ch := menuwin.GetChar()
switch ch {
case 'q':
return
case gc.KEY_DOWN:
menu.Driver(gc.REQ_DOWN)
case gc.KEY_UP:
menu.Driver(gc.REQ_UP)
}
}
}
func main() {
var active int
menu := []string{"Choice 1", "Choice 2", "Choice 3", "Choice 4", "Exit"}
stdscr, err := gc.Init()
if err != nil {
log.Fatal("init:", err)
}
defer gc.End()
gc.Raw(true)
gc.Echo(false)
gc.Cursor(0)
stdscr.Keypad(true)
y, x := 5, 2
win, err := gc.NewWindow(HEIGHT, WIDTH, y, x)
if err != nil {
log.Fatal("new_window:", err)
}
stdscr.MovePrint(0, 0, "Use up/down arrow keys, enter to "+
"select or 'q' to quit")
stdscr.MovePrint(1, 0, "You may also left mouse click on an entry to select")
stdscr.Refresh()
printmenu(win, menu, active)
// Check to see if the Mouse is available. This function was not available
// in older versions of ncurses (5.7 and older) and may return false even
// if the mouse is in fact avaiable for use.
if gc.MouseOk() {
stdscr.MovePrint(3, 0, "WARN: Mouse support not detected.")
}
// Adjust the default mouse-click sensitivity to make it more responsive
gc.MouseInterval(50)
// If, for example, you are temporarily disabling the mouse or are
// otherwise altering mouse button detection temporarily, you could
// pass a pointer to a MouseButton object as the 2nd argument to
// record that information. Invocation may look something like:
var prev gc.MouseButton
gc.MouseMask(gc.M_B1_PRESSED, nil) // only detect left mouse clicks
gc.MouseMask(gc.M_ALL, &prev) // temporarily enable all mouse clicks
gc.MouseMask(prev, nil) // change it back
for {
ch := stdscr.GetChar()
switch ch {
case 'q':
return
case gc.KEY_UP:
if active == 0 {
active = len(menu) - 1
} else {
active -= 1
}
case gc.KEY_DOWN:
if active == len(menu)-1 {
active = 0
} else {
active += 1
}
case gc.KEY_MOUSE:
/* pull the mouse event off the queue */
md := gc.GetMouse()
new := getactive(x, y, md.X, md.Y, menu)
if new != -1 {
active = new
}
stdscr.MovePrintf(23, 0, "Choice #%d: %s selected", active+1,
menu[active])
stdscr.ClearToEOL()
stdscr.Refresh()
case gc.KEY_RETURN, gc.KEY_ENTER, gc.Key('\r'):
stdscr.MovePrintf(23, 0, "Choice #%d: %s selected", active+1,
menu[active])
stdscr.ClearToEOL()
stdscr.Refresh()
default:
stdscr.MovePrintf(23, 0, "Character pressed = %3d/%c", ch, ch)
stdscr.ClearToEOL()
stdscr.Refresh()
}
printmenu(win, menu, active)
}
}