Run a QTimer on a separate QThread which doesn’t do anything else. If you’re running the timer on an already busy thread the timeout events may not come on time or not at all. Make a worker class e.g. “PingPacketWorker”, implement a slot that does pinging. Make a QThread. Connect your QTimer and PingPacketWorker signal/slots. … Read more
You have most likely an error somewhere in your timer making it throw an exception. You will not detect that since System.Timers.Timer silently ignores all unhandled exceptions. You’ll therefore have to wrap all code with a try/catch block: private void getFileList(object sender, EventArgs e) { try { DeleteOldBackupFiles(); } catch (Exception ex) { //log exception … Read more
Your current approach is indeed not easily generalizable. The hard-coded parts of the buttons for “blue” and “green”, and especially the special methods like blueToGreen make it impossible to extend the number of colors with reasonable effort. (You don’t want to create methods blueToYellow, blueToRed, blueToTheThirdColorFromThisListForWhichIDontKnowAName …). There are many possible ways of generalizing this. … Read more
If you want to use only javascript, without any server-side language you could store the time that is left in the localStorage variable, because after you exit the website/browser it will stay the same; Example: function countdown() { time = parseInt(localStorage.time); //All variables in localstorage are strings //Resets timer if cannot parse the localStorage.time variable … Read more
You will probably want some thing like the Calendar for the time addition. Example: Calendar future = Calendar.getInstance(); future.add(Calendar.HOUR_OF_DAY, enteredHour); future.add(Calendar.MINUTE, enteredMinute); future.add(Calendar.SECOND, enteredSecond); //And so on… //Now the calendar instance ‘future’ holds the current time plus the added values. As for entering the time, one possibility is to enter it as a text, and … Read more
Your problem is that you don’t use correct architecture pattern. You should separate your business logic from your presentation. Also you should store variables (like time_left) in model, not in the controller (i.e. ActionListener). Please read about: Model View Controller pattern. It’s a basic pattern and it’ll solve most of yours problems. Basic Example Editor.java … Read more
I had a similar app to be built some time ago, and I also tried things like you did, but that is very very wrong way to use timer and all to record your location. First of all, I suggest you to not try to record/ping location explicitly because, it will cause batter drainage. There … Read more
Simply have the text in an array, ( get it from some elements using jquery – however you want it) iterate through it and change the content inside the div using html() function when you are changing the color. Simple modification of your code would be something like function changeColorAndText(element, curNumber){ curNumber++; if(curNumber > 4){ … Read more
You should actually try doing it yourself first, but: new CountDownTimer(5000, 500) { public void onTick(long millisUntilFinished) { timerText.setText(“Half-seconds remaining: ” + millisUntilFinished / 500); } public void onFinish() { timerText.setText(“done!”); } }.start(); The CountDownTimer has two parameters in its constructor, one for the length of the timer as a whole (called millisInFuture, the first … Read more
Thread.sleep which stops all processing, so what if you had a loop inside it, and what if this loop was comparing identical objects? Would it keep creating a new instance of this loop?, and if it does what is the end result, say, if it was processing some heavy duty instructions in that loop? no, … Read more
The problem is if you save the time in cookie just before refresh and retrieve it after page loads it may not match the real current time because page may take arbitrary amount of time to refresh, 1st time it may be 1 sec 2nd time may be faster and take 0.5 sec due to … Read more