// contact Menu Window Navigation input handler
func contactsWindowNavigation(contactsMenuWin *gc.Window, contactMenu *gc.Menu) int {
	var c gc.Char
	var rawInput gc.Key
	for {
		gc.Update()
		rawInput = contactsMenuWin.GetChar()
		c = gc.Char(rawInput)
		if rawInput == gc.KEY_TAB || rawInput == gc.KEY_RETURN {
			return 0
		} else if c == gc.Char(27) {
			return 1
		} else if c == gc.Char('j') || rawInput == gc.KEY_DOWN {
			contactMenu.Driver(gc.REQ_DOWN)
			changeContact(contactsMenuWin, contactMenu)
		} else if c == gc.Char('k') || rawInput == gc.KEY_UP {
			contactMenu.Driver(gc.REQ_UP)
			changeContact(contactsMenuWin, contactMenu)
		} else if c == gc.Char('g') {
			contactMenu.Driver(gc.REQ_FIRST)
			changeContact(contactsMenuWin, contactMenu)
		} else if c == gc.Char('G') {
			contactMenu.Driver(gc.REQ_LAST)
			changeContact(contactsMenuWin, contactMenu)
		} else {
			continue
		}
	}
}

// makes the menu inside the contacts window
func makeContactsMenu(contacts []ts.Contact, contactsWin *gc.Window) ([]*gc.MenuItem, *gc.Menu, *gc.Window) {
	menu_items := make([]*gc.MenuItem, len(contacts))
	var err error
	for i, val := range contacts {
		menu_items[i], err = gc.NewItem((val.Name), "")
		if err != nil {
			log.Fatal("Error making item for contact menu... ", err)
		}
	}
	contactMenu, err := gc.NewMenu(menu_items)
	if err != nil {
		log.Fatal("Error creating contact menu from menu_items... ", err)
	}
	contactsWinSizeY, contactsWinSizeX := contactsWin.MaxYX()
	contactsWin.Keypad(true)
	contactsMenuWin := contactsWin.Derived((contactsWinSizeY - 5), (contactsWinSizeX - 2), 3, 1)
	contactMenu.SetWindow(contactsMenuWin)
	contactMenu.Format(len(contacts), 1)
	contactMenu.Mark(" * ")

	title := "Contacts"
	contactsWin.MovePrint(1, (contactsWinSizeX/2)-(len(title)/2), title)
	contactsWin.HLine(2, 1, '-', contactsWinSizeX-2)
	contactsMenuWin.Keypad(true)
	contactsMenuWin.ScrollOk(true)
	return menu_items, contactMenu, contactsMenuWin
}

func (h *Office) Draw(screen *gc.Window, y, x int) {
	f := h.Frames
	v, p := (*f)["Office"]

	if !p {
		frames := [][]string{[]string{
			"<----->",
			"|XXXXX|",
			"|     |",
			"|XXXXX|",
			"|     |",
			"|XXXXX|",
			"[-----]"}, []string{
			"<----->",
			"|XXXXX|",
			"|     |",
			"|     |",
			"|     |",
			"|XXXXX|",
			"[-----]"}}

		(*f)["Office"] = frames
		v = frames
	}

	for ly, row := range v[h.Frame] {
		for lx, c := range row {
			screen.MoveAddChar(y+ly, x+lx, MapChar(c))
		}
	}
}

// Function to call to update the information in the information Window.
func displayInfo(win *gc.Window, active, activeA int, userItems []*gc.MenuItem, userArticles map[string][]articleType) {
	win.Clear()
	win.MovePrint(1, 0, "Auteur : ", userItems[active].Name())
	win.MovePrint(2, 0, "Date : ", userArticles[userItems[active].Name()][activeA].date)
	win.MovePrint(4, 0, userArticles[userItems[active].Name()][activeA].url)
	win.Refresh()
}

// In addition to sending a message using janimo's library, also clears screen and resets buffer
func sendMsg(inputWin *gc.Window, msgWin *gc.Window) {
	if len(inputBuffer) != 0 {
		msg := string(inputBuffer)
		to := currentContact
		err := ts.SendMessage(to, msg)
		if err != nil {
			gc.End()
			log.Fatal("SendMessage failed yo: ", err)
		}

		var b bytes.Buffer
		t := time.Now()
		if t.Hour() < 10 {
			b.WriteString("0")
		}
		b.WriteString(strconv.Itoa(t.Hour()))
		b.WriteString(":")
		if t.Minute() < 10 {
			b.WriteString("0")
		}
		b.WriteString(strconv.Itoa(t.Minute()))
		b.WriteString(": ")
		b.WriteString(msg)

		printToMsgWindow(b.String(), msgWin, true)
		b.Reset()
		insertMessage("You", currentContact, []byte(msg), nil)
		inputBuffer = []byte{}
		inputWin.Erase()
	}
}

//sets up the initial configuration of curses. Keeps code in main cleaner.
func configCurses(stdscr *gc.Window) {
	if !gc.HasColors() {
		log.Fatal("Example requires a colour capable terminal")
	}
	if err := gc.StartColor(); err != nil {
		log.Fatal("Starting Colors failed:", err)
	}
	gc.Echo(false)

	if err := gc.InitPair(1, gc.C_RED, gc.C_BLACK); err != nil {
		log.Fatal("InitPair failed: ", err)
	}
	gc.InitPair(2, gc.C_BLUE, gc.C_BLACK)
	gc.InitPair(3, gc.C_GREEN, gc.C_BLACK)
	gc.InitPair(4, gc.C_YELLOW, gc.C_BLACK)
	gc.InitPair(5, gc.C_CYAN, gc.C_BLACK)
	gc.InitPair(6, gc.C_MAGENTA, gc.C_WHITE)
	gc.InitPair(7, gc.C_MAGENTA, gc.C_BLACK)

	//set background color to black
	stdscr.SetBackground(gc.Char(' ') | gc.ColorPair(0))

	stdscr.Keypad(true)
	gc.Cursor(1)
	gc.CBreak(true)
	stdscr.Clear()
}

func PrintHiglighted(window *gc.Window, y int, x int, index int, selected int, text string, isActive bool) {
	if index == selected && isActive {
		window.AttrOn(gc.A_STANDOUT)
	}
	window.MovePrint(y, x, text)
	if index == selected && isActive {
		window.AttrOff(gc.A_STANDOUT)
	}
}

func handleInput(stdscr *gc.Window, ship *Ship) bool {
	lines, cols := stdscr.MaxYX()
	y, x := ship.YX()
	k := stdscr.GetChar()

	switch byte(k) {
	case 0:
		break
	case 'a':
		x--
		if x < 2 {
			x = 2
		}
	case 'd':
		x++
		if x > cols-3 {
			x = cols - 3
		}
	case 's':
		y++
		if y > lines-4 {
			y = lines - 4
		}
	case 'w':
		y--
		if y < 2 {
			y = 2
		}
	case ' ':
		objects = append(objects, newBullet(y+1, x+4))
		objects = append(objects, newBullet(y+3, x+4))
	default:
		return false
	}
	ship.MoveWindow(y, x)
	return true
}

func (a *Asteroid) Draw(w *gc.Window) {
	w.Overlay(a.Window)
}

//creates the three Main big windows that make up the GUI
func createMainWindows(stdscr *gc.Window) (*gc.Window, *gc.Window, *gc.Window, *gc.Window, *gc.Window) {
	rows, cols := stdscr.MaxYX()
	height, width := rows, int(float64(cols)*.2)

	var contactsWin, messageWinBorder, inputBorderWin, inputWin *gc.Window
	var err error
	contactsWin, err = gc.NewWindow(height, width, 0, 0)
	if err != nil {
		log.Fatal("Failed to create Contact Window:", err)
	}
	err = contactsWin.Border('|', '|', '-', '-', '+', '+', '+', '+')
	if err != nil {
		log.Fatal("Failed to create Border of Contact Window:", err)
	}

	// messageWinBorder is just the border. msgWin is the actual input window
	// doing this simplifies handling text a fair amount.
	// also the derived function never errors. Which seems dangerous
	begin_x := width + 1
	height = int(float64(rows) * .8)
	width = int(float64(cols) * .8)
	messageWinBorder, err = gc.NewWindow(height, width, 0, begin_x)
	if err != nil {
		log.Fatal("Failed to create Message Border Window:", err)
	}
	err = messageWinBorder.Border('|', '|', '-', '-', '+', '+', '+', '+')
	if err != nil {
		log.Fatal("Failed to create Border of Message Window:", err)
	}
	msgWin, err := gc.NewWindow((height - 2), (width - 2), 1, (begin_x + 1))
	if err != nil {
		log.Fatal("Failed to create the message Window:", err)
	}

	begin_y := int(float64(rows)*.8) + 1
	height = int(float64(rows) * .2)
	inputBorderWin, err = gc.NewWindow(height, width, begin_y, begin_x)
	if err != nil {
		log.Fatal("Failed to create InputBorder Window:", err)
	}
	err = inputBorderWin.Border('|', '|', '-', '-', '+', '+', '+', '+')
	if err != nil {
		log.Fatal("Failed to create Border of the InputBorder Window:", err)
	}
	// inputBorderWin is just the border. InputWin is the actual input window
	// doing this simplifies handling text a fair amount.
	// also the derived function never errors. Which seems dangerous
	inputWin, err = gc.NewWindow((height - 2), (width - 2), (begin_y + 1), (begin_x + 1))
	if err != nil {
		log.Fatal("Failed to create the inputWin Window:", err)
	}

	inputWin.ScrollOk(true)
	inputWin.Keypad(true)
	msgWin.ScrollOk(true)

	return contactsWin, messageWinBorder, msgWin, inputBorderWin, inputWin
}

// handles keyboard input
func inputHandler(inputWin *gc.Window, stdscr *gc.Window, contactsMenuWin *gc.Window, contactMenu *gc.Menu, msgWin *gc.Window) {
	var NLlocate = map[int]newLine{}
	var c gc.Char
	var rawInput gc.Key
	max_y, max_x := inputWin.MaxYX()
	for {
		rawInput = inputWin.GetChar()
		c = gc.Char(rawInput)
		// debugLog.Println(rawInput)
		// debugLog.Println(c)

		//Escape to Quit
		if c == gc.Char(27) {
			break
		} else if rawInput == gc.KEY_BACKSPACE || c == gc.Char(127) {
			//Delete Key
			y, x := inputWin.CursorYX()
			var del = byte('F')
			if x != 0 {
				inputWin.MoveDelChar(y, x-1)
				del = inputBuffer[placer]
				copy(inputBuffer[placer:len(inputBuffer)-1], inputBuffer[placer+1:])
				inputBuffer = inputBuffer[0 : len(inputBuffer)-1]
				placer--
				if del != byte('\n') && NLlocate[y+scroll]._cursorX > x {
					temp := newLine{NLlocate[y+scroll]._cursorX - 1, NLlocate[y+scroll]._placer - 1}
					NLlocate[y+scroll] = temp
				}
				//debugLog.Println(inputBuffer)
			} else if y != 0 { //when x==0 and y!=0
				inputWin.Move(y-1, max_x-1)
				inputWin.MoveDelChar(y-1, max_x-1)
				del = inputBuffer[placer]
				copy(inputBuffer[placer:len(inputBuffer)-1], inputBuffer[placer+1:])
				inputBuffer = inputBuffer[0 : len(inputBuffer)-1]
				//debugLog.Println(inputBuffer)
				placer--
			}
			if del == byte('\n') {
				inputWin.Erase()
				inputWin.Print(string(inputBuffer))
				inputWin.Move(y-1, NLlocate[y-1+scroll]._cursorX)
				temp, check := NLlocate[y+scroll]
				var temp_cursor = temp._cursorX
				var temp_placer = temp._placer
				if check && NLlocate[y-1+scroll]._cursorX+temp_cursor >= max_x {
					_newLine := newLine{NLlocate[y-1+scroll]._cursorX + temp_cursor - max_x, NLlocate[y+scroll]._placer - 1}
					NLlocate[y+scroll] = _newLine
					delete(NLlocate, y-1)
				} else if check { // check if there are any '\n' this line
					var largest = -1          // if yes, select all '\n' and move
					for i := range NLlocate { // placer by 1 and adjust cursor
						if i >= y+scroll { // accordingly
							if next_nl, ok := NLlocate[i+1]; ok {
								new_nl := newLine{next_nl._cursorX, next_nl._placer - 1}
								NLlocate[i] = new_nl
							}
						}
						if i > largest {
							largest = i
						}
					}
					delete(NLlocate, largest) // delete last map entry
					_newLine := newLine{NLlocate[y-1+scroll]._cursorX + temp_cursor, NLlocate[y-1+scroll]._placer + temp_placer - 1}
					NLlocate[y-1+scroll] = _newLine
				} else {
					delete(NLlocate, y-1+scroll)
				}
			}
		} else if c == gc.KEY_PAGEDOWN {
			//debugLog.Println("HIT DOWN")
			msgWin.Scroll(-10)
			msgWin.Refresh()
			inputWin.Refresh()
		} else if c == gc.KEY_PAGEUP {
			//debugLog.Println("HIT UP")
			msgWin.Scroll(10)
			msgWin.Refresh()
			inputWin.Refresh()
		} else if c == gc.KEY_LEFT {
			y, x := inputWin.CursorYX()
			if x != 0 {
				inputWin.Move(y, x-1)
				placer--
			} else if y != 0 {
				inputWin.Move(y-1, max_x-1)
				placer--
			}
			if len(inputBuffer) > 0 && inputBuffer[placer+1] == byte('\n') {
				inputWin.Move(y-1, NLlocate[y-1+scroll]._cursorX)
			}
		} else if c == gc.KEY_RIGHT {
			y, x := inputWin.CursorYX()
			placer++
			if inputBuffer == nil || placer == len(inputBuffer) {
				inputBuffer = append(inputBuffer, byte(' '))
			}
			if inputBuffer[placer] == byte('\n') || x >= max_x-1 {
				inputWin.Move(y+1, 0)
//.........这里部分代码省略.........

// Hello dialog. So the nooblets know the controls
func doHello(stdscr *gc.Window) {
	stdscr.Refresh()
	y, x := stdscr.MaxYX()
	center_x := int(x / 2)
	center_y := int(y / 2)
	stdscr.MovePrintln(center_y-6, center_x-4, "Controls:")
	stdscr.MovePrintln(center_y-5, center_x-12, "Escape: Exit the program.")
	stdscr.MovePrintln(center_y-4, center_x-30, "Tab: Switch between the input window and the Message window.")
	stdscr.MovePrintln(center_y-3, center_x-11, "Return: Send a message")
	stdscr.MovePrintln(center_y-2, center_x-44, `Shift + Right Arrow: put in a new line '\n' character (like shift+return in facebook chat)`)
	stdscr.MovePrintln(center_y-1, center_x-30, "Page-Up / Page-Down: Scroll up in the message history window")
}

func (cw *chatWin) handleInput(win *goncurses.Window) (line string) {
	k := win.GetChar()
	if k == 0 {
		return ""
	}

	// some systems send a DEL ASCII character instead of KEY_BACKSPACE
	// account for both just in case
	if k == 127 {
		k = goncurses.KEY_BACKSPACE
	}

	switch k {
	case goncurses.KEY_TAB: // tab
	// case goncurses.KEY_RETURN: // enter key vs. KEY_ENTER
	case goncurses.KEY_DOWN: // down arrow key
	case goncurses.KEY_UP: // up arrow key
	case goncurses.KEY_LEFT: // left arrow key
	case goncurses.KEY_RIGHT: // right arrow key
	case goncurses.KEY_HOME: // home key
	case goncurses.KEY_BACKSPACE: // backpace
		if len(cw.line) > 0 {
			cw.line = cw.line[:len(cw.line)-1]
		}
		y, x := win.CursorYX()
		// TODO: handle this more elegantly (e.g. tell ncurses not to print backspaces)
		// we have to do this three times because ncurses inserts two characters for backspace
		// this is likely wrong in some cases
		for i := 0; i < 3; i++ {
			y, x = cw.moveLeft(y, x)
			win.MoveDelChar(y, x)
		}
		win.Refresh()
	case goncurses.KEY_F1: // F1 key
	case goncurses.KEY_F2: // F2 key
	case goncurses.KEY_F3: // F3 key
	case goncurses.KEY_F4: // F4 key
	case goncurses.KEY_F5: // F5 key
	case goncurses.KEY_F6: // F6 key
	case goncurses.KEY_F7: // F7 key
	case goncurses.KEY_F8: // F8 key
	case goncurses.KEY_F9: // F9 key
	case goncurses.KEY_F10: // F10 key
	case goncurses.KEY_F11: // F11 key
	case goncurses.KEY_F12: // F12 key
	case goncurses.KEY_DL: // delete-line key
	case goncurses.KEY_IL: // insert-line key
	case goncurses.KEY_DC: // delete-character key
	case goncurses.KEY_IC: // insert-character key
	case goncurses.KEY_EIC: // sent by rmir or smir in insert mode
	case goncurses.KEY_CLEAR: // clear-screen or erase key3
	case goncurses.KEY_EOS: // clear-to-end-of-screen key
	case goncurses.KEY_EOL: // clear-to-end-of-line key
	case goncurses.KEY_SF: // scroll-forward key
	case goncurses.KEY_SR: // scroll-backward key
	case goncurses.KEY_PAGEDOWN: // page-down key (next-page)
	case goncurses.KEY_PAGEUP: // page-up key (prev-page)
	case goncurses.KEY_STAB: // set-tab key
	case goncurses.KEY_CTAB: // clear-tab key
	case goncurses.KEY_CATAB: // clear-all-tabs key
	case goncurses.KEY_RETURN: // enter key vs. KEY_ENTER
		fallthrough
	case goncurses.KEY_ENTER: // enter/send key
		line = cw.line
		cw.line = ""
		win.Erase()
		win.Print(PROMPT)
	case goncurses.KEY_PRINT: // print key
	case goncurses.KEY_LL: // lower-left key (home down)
	case goncurses.KEY_A1: // upper left of keypad
	case goncurses.KEY_A3: // upper right of keypad
	case goncurses.KEY_B2: // center of keypad
	case goncurses.KEY_C1: // lower left of keypad
	case goncurses.KEY_C3: // lower right of keypad
	case goncurses.KEY_BTAB: // back-tab key
	case goncurses.KEY_BEG: // begin key
	case goncurses.KEY_CANCEL: // cancel key
	case goncurses.KEY_CLOSE: // close key
	case goncurses.KEY_COMMAND: // command key
	case goncurses.KEY_COPY: // copy key
	case goncurses.KEY_CREATE: // create key
	case goncurses.KEY_END: // end key
	case goncurses.KEY_EXIT: // exit key
	case goncurses.KEY_FIND: // find key
	case goncurses.KEY_HELP: // help key
	case goncurses.KEY_MARK: // mark key
	case goncurses.KEY_MESSAGE: // message key
	case goncurses.KEY_MOVE: // move key
	case goncurses.KEY_NEXT: // next key
	case goncurses.KEY_OPEN: // open key
	case goncurses.KEY_OPTIONS: // options key
	case goncurses.KEY_PREVIOUS: // previous key
	case goncurses.KEY_REDO: // redo key
	case goncurses.KEY_REFERENCE: // reference key
	case goncurses.KEY_REFRESH: // refresh key
	case goncurses.KEY_REPLACE: // replace key
	case goncurses.KEY_RESTART: // restart key
	case goncurses.KEY_RESUME: // resume key
	case goncurses.KEY_SAVE: // save key
	case goncurses.KEY_SBEG: // shifted begin key
//.........这里部分代码省略.........

// Prints messages to the message window
func printToMsgWindow(msg string, msgWin *gc.Window, amSending bool) {
	lines := int(len(msg)/(msgWinSize_x-1)) + 1
	if amSending == true {
		msgWin.Scroll(lines)
		msgWin.ColorOn(2)
		msgWin.MovePrint((msgWinSize_y - lines), 0, msg)
	} else {
		if strings.ContainsAny(msg, "\n") {
			printByLineBreakdown := strings.Split(msg, "\n")
			for i, val := range printByLineBreakdown {
				if i != 0 {
					msgWin.Scroll(1)
				}
				lines2 := int(len(val)/(msgWinSize_x-1)) + 1
				if lines2 > 1 {
					msgWin.Scroll(lines2)
					msgWin.ColorOn(1)
					msgWin.MovePrint((msgWinSize_y - lines2), int(msgWinSize_x*3/4), val)
				} else {
					msgWin.Scroll(lines2)
					msgWin.ColorOn(1)
					space_buf := (msgWinSize_x) - len(val)
					msgWin.MovePrint((msgWinSize_y - lines), space_buf, val)
					msgWin.Scroll(-1)
				}
			}
		} else {
			if lines > 1 {
				msgWin.Scroll(lines)
				msgWin.ColorOn(1)
				msgWin.MovePrint((msgWinSize_y - lines), int(msgWinSize_x*3/4), msg)
			} else {
				msgWin.Scroll(lines)
				msgWin.ColorOn(1)
				space_buf := (msgWinSize_x) - len(msg)
				msgWin.MovePrint((msgWinSize_y - lines), space_buf, msg)
				msgWin.Scroll(-1)
			}
		}
	}
	msgWin.Refresh()
	globalInputWin.Refresh()
}

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 (c *Circuit) display() {
	stdscr, err := gc.Init()
	if err != nil {
		log.Println(err)
	}
	defer gc.End()

	rows, cols := stdscr.MaxYX()
	height, width := len(c.circuit)+1, len(c.circuit[0])+1
	y, x := (rows-height)/2, (cols-width)/2

	var win *gc.Window
	win, err = gc.NewWindow(height, width, y, x)
	if err != nil {
		log.Println(err)
	}
	defer win.Delete()

	win.Timeout(500)

	for i := 0; i != height-1; i++ {
		for j := 0; j != width-1; j++ {
			if c.circuit[i][j] == "" {
				continue
			}
			char := gc.Char([]rune(c.circuit[i][j])[0])
			win.MoveAddChar(i, j, char)
		}
	}

main:
	for {
		for _, com := range c.Components {
			com.Update()
		}

		for _, com := range c.Components {
			cx, cy, _, _ := com.Space()
			for coord, out := range com.Visual() {
				char := gc.Char([]rune(*out)[0])
				win.MoveAddChar(cx+coord.X, cy+coord.Y, char)
			}
		}

		win.NoutRefresh()
		gc.Update()

		switch win.GetChar() {
		case 'q':
			break main
		}
	}
}

func printmenu(w *gc.Window, menu []string, active int) {
	y, x := 2, 2
	w.Box(0, 0)
	for i, s := range menu {
		if i == active {
			w.AttrOn(gc.A_REVERSE)
			w.MovePrint(y+i, x, s)
			w.AttrOff(gc.A_REVERSE)
		} else {
			w.MovePrint(y+i, x, s)
		}
	}
	w.Refresh()
}

func windw() {
	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 := 20, 40
	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)

windw:
	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 windw
		case 'h':
			if x > 0 {
				x--
			}
		case 'l':
			if x < cols-width {
				x++
			}
		case 'k':
			if y > 1 {
				y--
			}
		case 'j':
			if y < rows-height {
				y++
			}
		}
	}
	win.Delete()
}