func (ui *NcurseUi) Handle(input int) {
if action, ok := goncurses.DriverActions[goncurses.Key(input)]; ok && ui.menu != nil {
ui.menu.Driver(action)
}
ui.menuBar.Refresh()
ui.contents.Refresh()
}
func (h *hncli) Run() {
for !h.finished {
c := h.root.GetChar()
if c == 127 {
c = goncurses.Key(goncurses.KEY_BACKSPACE)
}
ch := goncurses.KeyString(c)
h.handler(ch)
}
}
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)
}
}
// Returns an articleType that can be downloaded and displayed.
func ncurses(articles map[string][]articleType) (article articleType, err error) {
// Initialize the standard screen
stdscr, err := gc.Init()
if err != nil {
return
}
defer gc.End()
h, w := stdscr.MaxYX()
// Initialize the library
gc.Raw(true)
gc.Echo(false)
gc.Cursor(0)
stdscr.Keypad(true)
// Build the user menu items
userItems := make([]*gc.MenuItem, len(articles))
i := 0
for val := range articles {
userItems[i], err = gc.NewItem(val, "")
if err != nil {
return
}
defer userItems[i].Free()
i++
}
// Build the first user's article items
articleItems := make([]*gc.MenuItem, len(articles[userItems[0].Name()]))
i = 0
for _, val := range articles[userItems[0].Name()] {
articleItems[i], err = gc.NewItem(val.title, "")
if err != nil {
return
}
defer articleItems[i].Free()
i++
}
// Create the user menu
userMenu, userMenuWin, err := newFeatureMenu(userItems, h, w/2, 0, 0)
if err != nil {
return
}
// Post the user menu and refresh the user window
userMenu.Post()
defer userMenu.UnPost()
userMenuWin.Refresh()
// Create the article menu
articleMenu, articleMenuWin, err := newFeatureMenu(articleItems, h/2, w/2, 0, w/2)
if err != nil {
return
}
// Post the article menu and refresh the article window
articleMenu.Post()
defer articleMenu.UnPost()
articleMenuWin.Refresh()
// Create the information window used to display article information
aInfoWin, err := gc.NewWindow(h/2+1, w/2, h/2, w/2+1)
if err != nil {
return
}
displayInfo(aInfoWin, 0, 0, userItems, articles)
active := 0
activeA := 0
currentMenuWin := userMenuWin
currentMenu := userMenu
for {
gc.Update()
ch := currentMenuWin.GetChar()
switch ch {
case 'q':
return
case gc.KEY_UP:
if currentMenu == userMenu {
if active != 0 {
active--
articleItems = make([]*gc.MenuItem, len(articles[userItems[active].Name()]))
i = 0
for _, val := range articles[userItems[active].Name()] {
articleItems[i], _ = gc.NewItem(val.title, "")
defer articleItems[i].Free()
i++
}
articleMenu.UnPost()
articleMenu.SetItems(articleItems)
articleMenu.Post()
articleMenuWin.Refresh()
displayInfo(aInfoWin, active, activeA, userItems, articles)
}
} else {
if activeA != 0 {
activeA--
displayInfo(aInfoWin, active, activeA, userItems, articles)
}
}
currentMenu.Driver(gc.DriverActions[ch])
case gc.KEY_DOWN:
if currentMenu == userMenu {
if active != len(userItems)-1 {
active++
articleItems = make([]*gc.MenuItem, len(articles[userItems[active].Name()]))
i = 0
for _, val := range articles[userItems[active].Name()] {
articleItems[i], _ = gc.NewItem(val.title, "")
defer articleItems[i].Free()
i++
}
articleMenu.UnPost()
articleMenu.SetItems(articleItems)
articleMenu.Post()
articleMenuWin.Refresh()
displayInfo(aInfoWin, active, activeA, userItems, articles)
}
} else {
if activeA != len(articleItems)-1 {
activeA++
aInfoWin.MovePrint(1, 1, "Auteur : ", userItems[active].Name())
aInfoWin.Refresh()
displayInfo(aInfoWin, active, activeA, userItems, articles)
}
}
currentMenu.Driver(gc.DriverActions[ch])
case gc.KEY_LEFT:
// If the LEFT key is pressed, then set the active menu and active
// menu window to the user ones. Also resets the current article counter
if currentMenu == articleMenu {
currentMenu = userMenu
currentMenuWin = userMenuWin
activeA = 0
}
case gc.KEY_RIGHT:
// If the RIGHT key is pressed, then set the active menu and active
// menu window to the article one.
if currentMenu == userMenu {
currentMenu = articleMenu
currentMenuWin = articleMenuWin
}
case gc.KEY_ENTER, gc.KEY_RETURN, gc.Key('\r'):
// If one of the Enter/Return key is pressed, depending on the current
// menu, switch to the article menu or start downloading the selected
// article.
if currentMenu == userMenu {
currentMenu = articleMenu
currentMenuWin = articleMenuWin
activeA = 0
} else {
article = articles[userItems[active].Name()][activeA]
return
}
default:
currentMenu.Driver(gc.DriverActions[ch])
}
}
}