I a rewards site. Users earn points when they watch videos. Users want to skip to the end of the video to quickly earn their points. Therefore, the mechanism of the video being marked as completed is managed by a JS timer.
The Problem: When a user pauses the video, the timer needs to pause. When the user clicks play again, a setInterval is used to reopen the function, where a setInterval within the existing function does the same thing, creating a huge problem...
This is the code that is set every second to update the timer...
var video_percent_count = 0;
function video_percent() {
var prize_video = document.getElementById("prize_video");
total_duration = Math.floor(prize_video.duration) + 1;
video_percent_count++;
percent = video_percent_count / total_duration;
convert_percent = (percent * 100).toFixed(2);
if(convert_percent == 100) {
clearInterval(video_percent_interval);
}
if(prize_video.paused) {
clearInterval(video_percent_interval);
}
if(prize_video.play) {
setInterval("video_percent()", 1000);
}
$(".percent_container").text(convert_percent);
}
function prize_video(count_prize) {
var back_count_prize = count_prize - 1;
$("#prize_video").get(back_count_prize).play();
video_percent_interval = setInterval("video_percent()", 1000);
}
How can I properly manage play and pause and still keep setInterval clean?
I've been trying to figure out how to run an infinite loop while pausing for user click, then allow for a break out.
When the loop starts, the user is presented with an image, and must choose the identical image from one of 4 displayed. If they successfully click the match within 5 seconds, they are presented another image, and the game goes on.
If they either choose an incorrect image, or 5 seconds elapses, the game ends.
I've got all of the functionality worked out, except this pause while waiting for a click or the time to expire.
Ideally, I'd also like the time to be adjustable on each iteration. Say start at 5 seconds, then shorten the time slightly (10ms) on each loop.
I believe it must be solvable using setTimeout() or setInterval(), but just can't wrap my head around it.
Here is a minimal concept of what I'm trying to accomplish.
$('#playnow').on('click',function(){
var speed = 5000;
var speed_reduce = 10;
var game_running = true;
/* create array of images */
var imgs = ['puppy.png','kitten.png','bunny.png','goldfish.png'];
var runnow = setInterval(
function(){
//get random image from loaded theme
rand_img = imgs[Math.floor(Math.random() * imgs.length) ];
//display chosen image
$('#goal_image').html('<img src="'+theme_dir+rand_img+'" />');
// wait up to 5 seconds for user to click or time to expire
if(*clicked and matched*){
//get new random image and reset timer (less 10ms)
}
if(*time expired*){
//bail out and game ends
}
/* reduce time */
speed -= speed_reduce;
},
speed);
});
You'll want something like this I think:
var speed = 5000, // the initial time
currentimage,
timer,
gamerunning;
function newimage(){
var imgs = ['puppy.png','kitten.png','bunny.png','goldfish.png'];
currentimage=Math.floor(Math.random() * imgs.length);
$('#goal_image').html('<img src="'+theme_dir+imgs[currentimage]+'" />');
timer = setTimeout(speed, lost)
}
function answer(id){
if(!gamerunning){return}
clearTimeout(timer)
if(id==currentimage){
speed -= 10; // time decrease every time.
newimage();
}else{
lost()
}
}
function lost(){
gamerunning=0;
speed=5000;
// what to do when lost.
}
$("#puppy").on("click",function(){answer(0)}); // here #puppy is the id of the answer image, and 0 the index in the imgs array.
$("#kitten").on("click",function(){answer(1)});
$("#bunny").on("click",function(){answer(2)});
$("#fish").on("click",function(){answer(3)});
$("#gamestartbutton").on("click",function(){gamerunning=1})
One way to solve this problem is to use setTimeout() and clearTimeout() rather than setInterval. Also, you need some event for the successful button click (I've pretended you have a special "#successfulmatch" button):
var speed = 5000;
var speed_reduce = 10;
var game_running = true;
var imgs = ['puppy.png','kitten.png','bunny.png','goldfish.png'];
var myTimeout;
function runNow(speed){
rand_img = imgs[Math.floor(Math.random() * imgs.length) ];
$('#goal_image').html('<img src="'+theme_dir+rand_img+'" />');
// Keep track of the timeout so we can cancel it later if the user clicks fast enough.
myTimeout = window.setTimeout(function(){
game_running = false;
gameEnds();
},speed);
}
$('#successfulmatch').on('click',function(){
if(game_running){
// Cancel the timeout because the user was fast enough
window.clearTimeout(myTimeout);
// Give the user less time than before
runNow(speed - speed_reduce);
}
else{
// Throw an error: you forgot to hide the clickable buttons when the game ended.
}
}
$('#playnow').on('click',function(){
runNow(speed);
}
Looks like you are mixing the logic for checking "has the user clicked the image? was it correct?" with the one for checking "has time expired?"
You can listen for onclick events on the images
and set a timeout event for the game over
so the user has to cancel that timer, to cancel imminent game over, by clicking on the images
if the right image is clicked the timer is reset
if not, it's game over
you can cancel a timeout event before it runs with cancelTimeout()
see W3C here for a reference.
here is a quick prototype:
$('#playnow').on('click', function() {
var speed = 5000;
var speed_reduce = 10;
var game_running = true;
/* create array of images */
var imgs = ['puppy.png', 'kitten.png', 'bunny.png', 'goldfish.png'];
// function that ends the game if it's called
function gameover() {
alert("GAME OVER");
game_running = false;
}
// in order to use clearTimeout() you must store the timer in a global variable
// setting a timeout that will end the game if it's not cleared before
window.timer = setTimeout(gameover, speed);
// function that is called whenever the user clicks on a image
function onclickimage(event) {
if (!game_running) return;
if ( /*clicked right img*/ ) {
// get random image from loaded theme
var rand_img = imgs[Math.floor(Math.random() * imgs.length)];
// display chosen image
$('#goal_image').html('<img src="' + theme_dir + rand_img + '" />');
// delete timer, user now has one more opportunity
clearTimeout(timer);
// speed is less 10ms
speed -= speed_reduce;
// launch timer again
window.gametimer = setTimeout(loop, speed);
} else { // if click did not match correct image
gameover();
}
}
});
Well, firstly, you need to clearInterval() when they either click or fail in order to stop the current interval. Then, you can restart an interval with the new speed. The interval seems to be working for.
Every 5 seconds a new picture is displayed. So, you want an onclick event for the picture that clears the interval and starts a new one. So, you may want to use setTimeout instead of setInterval since it is only a single iteration at a time.
You could use setInterval, I suppose, but there's no real benefit to it. This way also makes it relatively easy to reduce the speed each time.
In jquery i use following code:
j=-(i)
if(j%2==1)
{
$("#caption1").hide();
$("#caption1").fadeIn(1000);
$('#main_div').hide();
$('#main_div').show(5000);
}
}
if(i%2==0)
{
$("#caption1").hide();
$("#caption1").fadeIn(1000);
$('#main_div').hide();
$('#main_div').show(5000);
}
while show animation i want the duration of animation completed?
for Example:
i set it show animation for 5secs.
show animation now started.
2 secs animation completed[ 3secs remaining]
in this case i need this completed duration[2secs] on button click??
Mark down the time when the animation started:
var animationStarted = new Date();
$('#main_div').show(5000);
....
When you need to show how much time has passed, take the current time and subtract the time saved in the previous step.
var now = new Date();
var elapsed = ( now.getTime() - animationStarted.getTime() ) / 1000;
Demo: http://jsfiddle.net/NZGU6/
I am currently working on porting a vb.net winforms program over to a web based version, and one of the functions in the original program has be stumped.
In the original program, every 5 minutes, a form pops up for user input. There is also a label control on the main form which counts down to the next popup. This is accomplished with a single timer control with a 1 second duration. every tick, it decrements the countdown, and when the countdown reaches 0, it pops up the form and then resets. Simple enough, but in my web app, I can't afford to be doing a postback every second, so what I am attempting is to combine a javascript countdown widget with an AJAX timer. Essentially, what should happen is that when the page loads, the countdown begins decrementing from 300 seconds, and the AJAX timer begins with a duration of 300 seconds. My idea is that when the timer ticks, it will run my function, as well as reset the countdown to 300 seconds again.
My problem, is that I am not able to reset the countdown with the code that I have, and I know that I am doing something (likely very simple) wrong, but I don't know enough Java to know what.
If I hardcode the Timer var to 300, the countdown works, and the timer ticks (fires the additional functons), but the countdown just keeps counting down (into negative numbers). How do I reset the countdown variable from code behind?
Here is the countdown function
var Timer = <%= CountDown %>;
function updateClock() {
// Update Countdown
Timer -= 1;
var TimerMin = Math.floor(Timer / 60);
var TimerSec = Timer - (TimerMin * 60);
TimerSec = (TimerSec < 10 ? "0" : "") + TimerSec;
var TimerFormat = TimerMin + ":" + TimerSec;
// Update the countdown display
document.getElementById("javaCountdown").firstChild.nodeValue = TimerFormat
}
Here is the body code
<body onload="updateClock(); setInterval('updateClock()', 1000 )">
And the Code Behind
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Countdown = 300
End Sub
PProtected Sub Timer1_Tick(ByVal sender As Object, ByVal e As EventArgs) Handles Timer1.Tick
Countdown = 300
'Additional Functions
End Sub
This solution uses jQuery.
<script>
var intervalSecond = null;
var interval5minutes = null;
$(document).ready(function() {
// enable both intervals
enableIntervals();
// onsubmit event for your form
$("#popupForm").submit(function() {
// hide the form again
$("#popupForm").css("display", "none");
// enable intervals again.
enableIntervals();
});
});
function enableIntervals() {
// every second interval
intervalSecond = setInterval(function() {
$("#updateMeEverySecond").html(new Date());
}, 1000);
// every 5 minutes interval
interval5minutes = setInterval(function() {
// display form and shut off the interval timers
$("#popupForm").css("display", "block");
clearInterval(intervalSecond);
clearInterval(interval5minutes);
}, 5 * 60 * 1000);
}
</script>
<div id="popupForm" style="display:none;">
<form>
<input type="text" />
</form>
</div>
<label id="updateMeEverySecond">Test</label>
I'm trying to create some time based events using a chronometer. The code below is successfully displaying a toast after 5 seconds of chronometer being started however I need the toast to be displayed at 5/10/20 seconds.
I've tried using if (elapsedTime == 5000 ||elapsedTime == 10000 ) but no toast displays when I use ==.
Any ideas?
Chronometer.OnChronometerTickListener mChronoListener = new OnChronometerTickListener() { // listens to journey timer to initiate time based events
public void onChronometerTick(Chronometer arg0) {
long elapsedTime = SystemClock.elapsedRealtime() - arg0.getBase();
if (elapsedTime > 5000)
{
Toast.makeText(SafeDrive3Activity.this, "HOUR PASSED", Toast.LENGTH_LONG).show();
}
}
};
Try something like this (if you want to keep it going every 10 seconds thereafter):
Chronometer.OnChronometerTickListener mChronoListener = new OnChronometerTickListener() {
// listens to journey timer to initiate time based events
int currentNeededTime = 5000;
public void onChronometerTick(Chronometer arg0) {
long elapsedTime = SystemClock.elapsedRealtime() - arg0.getBase();
if (elapsedTime > currentNeededTime)
{
Toast.makeText(SafeDrive3Activity.this, "HOUR PASSED", Toast.LENGTH_LONG).show();
currentNeededTime += currentNeededTime == 5000 ? 5000 : 10000;
}
}
};