func genStarfield(pl, pc int) *gc.Pad {
pad, err := gc.NewPad(pl, pc)
if err != nil {
log.Fatal(err)
}
stars := int(float64(pc*pl) * density)
planets := int(float64(pc*pl) * planet_density)
for i := 0; i < stars; i++ {
y, x := rand.Intn(pl), rand.Intn(pc)
c := int16(rand.Intn(4) + 1)
pad.AttrOn(gc.A_BOLD | gc.ColorPair(c))
pad.MovePrint(y, x, ".")
pad.AttrOff(gc.A_BOLD | gc.ColorPair(c))
}
for i := 0; i < planets; i++ {
y, x := rand.Intn(pl), rand.Intn(pc)
c := int16(rand.Intn(2) + 5)
pad.ColorOn(c)
if i%2 == 0 {
pad.MoveAddChar(y, x, 'O')
}
pad.MoveAddChar(y, x, 'o')
pad.ColorOff(c)
}
return pad
}
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()
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()
ch := stdscr.GetChar()
for ch != 'q' {
switch ch {
case gc.KEY_DOWN:
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)
default:
form.Driver(ch)
}
ch = stdscr.GetChar()
}
}
func newBullet(y, x int) *Bullet {
w, err := gc.NewWindow(1, 1, y, x)
if err != nil {
log.Println("newBullet:", err)
}
w.AttrOn(gc.A_BOLD | gc.ColorPair(4))
w.Print("-")
return &Bullet{w, true}
}
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("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])
}
}
}