Terminal control/Hiding the cursor
You are encouraged to solve this task according to the task description, using any language you may know.
The task is to hide the cursor and show it again.
AutoHotkey
Keep in mind that AHK is not built for the command line, so we must call the WinAPI directly. <lang AHK>DllCall("AllocConsole") ; Create a console if not launched from one hConsole := DllCall("GetStdHandle", UInt, STDOUT := -11)
VarSetCapacity(cci, 8) ; CONSOLE_CURSOR_INFO structure DllCall("GetConsoleCursorInfo", UPtr, hConsole, UPtr, &cci) NumPut(0, cci, 4) DllCall("SetConsoleCursorInfo", UPtr, hConsole, UPtr, &cci)
FileAppend, Cursor hidden for 3 seconds..., CONOUT$ ; Prints to stdout Sleep 3000
NumPut(1, cci, 4) DllCall("SetConsoleCursorInfo", UPtr, hConsole, UPtr, &cci)
FileAppend, `nCursor shown, CONOUT$ MsgBox</lang>
BASIC
<lang qbasic>'hide the cursor: LOCATE , , 0 'wait for a keypress... SLEEP 'show the cursor: LOCATE , , 1</lang>
Applesoft BASIC
<lang ApplesoftBasic>WAIT 49152,128</lang>
BBC BASIC
<lang bbcbasic> OFF : REM Hide the cursor (caret)
WAIT 400
ON : REM Show the cursor again</lang>
Befunge
Assuming a terminal with support for ANSI escape sequences, this hides the cursor, waits for the user to press Enter, and then shows the cursor again. <lang befunge>"l52?["39*,,,,,, >v "retnE sserP">:#,_v> "h52?["39*,,,,,,@ >~</lang>
C
<lang c> /*30th August,2012 Abhishek Ghosh
Please note that curs_set is terminal dependent.*/
- include<curses.h>
- include<stdio.h>
int main () {
printf
("At the end of this line you will see the cursor, process will sleep for 5 seconds.");
napms (5000);
curs_set (0);
printf
("\nAt the end of this line you will NOT see the cursor, process will again sleep for 5 seconds.");
napms (5000);
printf ("\nGoodbye.");
return 0;
} </lang>
C++
<lang cpp>
- include <Windows.h>
int main() {
bool showCursor = false; HANDLE std_out = GetStdHandle(STD_OUTPUT_HANDLE); // Get standard output CONSOLE_CURSOR_INFO cursorInfo; // GetConsoleCursorInfo(out, &cursorInfo); // Get cursorinfo from output cursorInfo.bVisible = showCursor; // Set flag visible. SetConsoleCursorInfo(out, &cursorInfo); // Apply changes
} </lang>
C#
<lang csharp>static void Main(string[] args) {
Console.Write("At the end of this line you will see the cursor, process will sleep for 5 seconds.");
System.Threading.Thread.Sleep(5000);
Console.CursorVisible = false;
Console.WriteLine();
Console.Write("At the end of this line you will not see the cursor, process will sleep for 5 seconds.");
System.Threading.Thread.Sleep(5000);
}</lang>
Common Lisp
<lang lisp> (defun sh (cmd)
#+clisp (shell cmd) #+ecl (si:system cmd) #+sbcl (sb-ext:run-program "/bin/sh" (list "-c" cmd) :input nil :output *standard-output*) #+clozure (ccl:run-program "/bin/sh" (list "-c" cmd) :input nil :output *standard-output*))
(defun show-cursor (x)
(if x (sh "tput cvvis") (sh "tput civis")))
(show-cursor nil) (sleep 3) (show-cursor t) (sleep 3) </lang>
FunL
<lang funl>import time.* import console.*
hide() sleep( 2 Second ) show()</lang>
Go
External command
<lang go>package main
import (
"os" "os/exec" "time"
)
func main() {
tput("civis") // hide
time.Sleep(3 * time.Second)
tput("cvvis") // show
time.Sleep(3 * time.Second)
}
func tput(arg string) error {
cmd := exec.Command("tput", arg)
cmd.Stdout = os.Stdout
return cmd.Run()
}</lang>
Escape code
(Not sure if this is ANSI, but it worked for me.) <lang go>package main
import (
"fmt" "time"
)
func main() {
fmt.Print("\033[?25l")
time.Sleep(3 * time.Second)
fmt.Print("\033[?25h")
time.Sleep(3 * time.Second)
}</lang>
Ncurses
<lang go>package main
import (
"log" "time"
gc "code.google.com/p/goncurses"
)
func main() {
s, err := gc.Init()
if err != nil {
log.Fatal("init:", err)
}
defer gc.End()
gc.Cursor(0)
time.Sleep(3 * time.Second)
gc.Cursor(1)
s.GetChar()
}</lang>
J
With the definitions of Terminal_control/Coloured_text#J <lang J>smoutput HIDECURSOR usleep(4e6) NB. wait 4 seconds smoutput SHOWCURSOR </lang>
Kotlin
<lang scala>// version 1.1.1
fun main(args: Array<String>) {
print("\u001B[?25l") // hide cursor
Thread.sleep(2000) // wait 2 seconds before redisplaying cursor
print("\u001B[?25h") // display cursor
Thread.sleep(2000) // wait 2 more seconds before exiting
}</lang>
Lasso
<lang Lasso>#!/usr/bin/lasso9
local( esc = decode_base64('Gw==') )
// hide the cursor stdout(#esc + '[?25l')
// wait for 4 seconds to give time discover the cursor is gone sleep(4000)
// show the cursor stdout(#esc + '[?25h')
// wait for 4 seconds to give time discover the cursor is back sleep(4000)</lang>
Locomotive Basic
<lang locobasic>10 CURSOR 0: REM hide cursor 20 FOR l = 1 TO 2000: REM delay 30 NEXT l 40 CURSOR 1: REM show cursor</lang>
Mathematica
<lang Mathematica>Run["tput civis"] (* Cursor hidden *) Pause[2] Run["tput cvvis"] (* Cursor Visible *)</lang>
Nemerle
<lang Nemerle>using System.Console; using System.Threading.Thread;
module CursorVisibility {
Main() : void
{
repeat(3) {
CursorVisible = !CursorVisible;
Sleep(5000);
}
}
}</lang>
Perl 6
<lang perl6>run 'tput', 'civis'; sleep 5; run 'tput', 'cvvis';</lang>
Phix
<lang Phix>cursor(NO_CURSOR) sleep(1) cursor(UNDERLINE_CURSOR)</lang>
PicoLisp
<lang PicoLisp>(call "tput" "civis") # Invisible (wait 1000) (call "tput" "cvvis") # Visible</lang>
PureBasic
<lang PureBasic>#cursorSize = 10 ;use a full sized cursor
If OpenConsole()
Print("Press any key to toggle cursor: ")
EnableGraphicalConsole(1)
height = #cursorSize
ConsoleCursor(height)
Repeat
If Inkey()
height ! #cursorSize
ConsoleCursor(height)
EndIf
ForEver
EndIf </lang>
Tested with PB v5.60
<lang PureBasic>Procedure HideCursor ()
ConsoleCursor(0)
EndProcedure
Procedure ShowCursor (CursorHeight.b = 1)
If CursorHeight > 10 : CursorHeight = 10 : EndIf If CursorHeight < 1 : CursorHeight = 1 : EndIf ConsoleCursor(CursorHeight)
EndProcedure
Procedure NL (NoL.b = 1)
For i = 1 To NoL : PrintN("") : Next
EndProcedure
If OpenConsole()
EnableGraphicalConsole(1)
Print(" full cursor > ")
ShowCursor(11) : Delay(4000) : NL()
Print(" hidden cursor > ")
HideCursor() : Delay(4000) : NL()
Print("minimal cursor > ")
ShowCursor(-0.5)
Print("press [Enter] to continue ... ") : Input()
EndIf</lang>
Racket
<lang racket>
- lang racket
(void (system "tput civis")) (sleep 2) (void (system "tput cvvis")) </lang>
REXX
<lang rexx>/*REXX pgm calls a function in a shared library (regutil) to hide/show cursor.*/ z=rxfuncadd('sysloadfuncs', "regutil", 'sysloadfuncs') /*add a function lib.*/ if z\==0 then do /*test the return cod*/
say 'return code' z "from rxfuncadd" /*tell about bad RC. */
exit z /*exit this program. */
end
call sysloadfuncs /*load the functions.*/
/* [↓] call a particular function. */
call syscurstate 'off' /*hide the displaying of the cursor. */ say 'showing of the cursor is now off' /*inform that the cursor is now hidden.*/
/* ··· and perform some stuff here ··· */
say 'sleeping for three seconds ...' /*inform the user of what we're doing. */ call sleep 3 /*might as well sleep for three seconds*/
call syscurstate 'on' /*(unhide) the displaying of the cursor*/ say 'showing of the cursor is now on' /*inform that the cursor is now showing*/
/*stick a fork in it, we're all done. */</lang>
output
showing of the cursor is now off sleeping for three seconds ... showing of the cursor is now on
Ruby
<lang ruby>require "curses" include Curses
init_screen begin
curs_set(1) #visible cursor sleep 3 curs_set(0) #invisible cursor sleep 3 curs_set(1) #visible cursor sleep 3
ensure
close_screen
end</lang>
Tcl
<lang tcl>proc cursor Template:State "normal" {
switch -- $state {
"normal" {set op "cnorm"} "invisible" {set op "civis"} "visible" {set op "cvvis"}
} # Should be just: “exec tput $op” but it's not actually supported on my terminal... exec sh -c "tput $op || true"
}</lang> Demonstration code: <lang tcl>cursor normal puts "normal cursor" after 3000 cursor invisible puts "invisible cursor" after 3000 cursor visible puts "very visible cursor" after 3000 cursor normal puts "back to normal" after 1000</lang>
UNIX Shell
<lang sh>tput civis # Hide the cursor sleep 5 # Sleep for 5 seconds tput cnorm # Show the cursor</lang>
XPL0
<lang XPL0>include c:\cxpl\codes; \intrinsic 'code' declarations
proc ShowCur(On); \Turn flashing cursor on or off int On; \true = cursor on; false = cursor off int CpuReg; [CpuReg:= GetReg; \access CPU registers CpuReg(0):= $0100; \AX:= $0100 CpuReg(2):= if On then $0007 else $2000; SoftInt($10); \Call BIOS interrupt $10 ]; \ShowCur
[ShowCur(false); \turn off flashing cursor if ChIn(1) then []; \wait for keystroke ShowCur(true); \turn on flashing cursor ]</lang>
zkl
Hide the cursor for three seconds on an ANSI terminal <lang zkl>print("\e[?25l"); Atomic.sleep(3); print("\e[?25h");</lang>