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  Java game - time  (Read 2788 times)
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Offline ritonda66

Senior Newbie





« Posted 2012-02-17 21:06:08 »

now im using
millis = System.currentTimeMillis() - startTime;
hours = millis / (1000 * 60 * 60);
millis -= hours * (1000 * 60 * 60);
minutes = millis / (1000 * 60);
millis -= minutes * (1000 * 60);
seconds = millis / 1000;
g.drawString("Time: " + hours + ":" + minutes + ":" + seconds, 300, 10);
is there a way to make it stop? for example press pause, the timer freezes, again pause and it works?
Offline evilfrenchguy

Junior Duke


Medals: 3



« Reply #1 - Posted 2012-02-17 22:30:19 »

Sure.

You could have a boolean isPaused, and only update the clock when isPaused is false.
Offline Beamery

Senior Newbie


Medals: 1



« Reply #2 - Posted 2012-02-18 19:36:58 »

It depends.  Do you want the clock to actually stop updating when you pause, or simply stop displaying updates?
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Offline jammas615

Junior Duke


Projects: 1



« Reply #3 - Posted 2012-02-18 20:06:39 »

Using a boolean called isPaused or similar is good.

You can then do something like:
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public void update(int delta) {
    if (isPaused) {
        //update the pause menu
    }
    else {
        //update the game
    }
}


That code would just stop updating the game at its current position and then when it is un-paused, it will continue from where it was.
The rendering method would be similar but you would just draw the pause screen last and over the game.

Offline counterp

Senior Duke


Medals: 11



« Reply #4 - Posted 2012-02-18 20:39:52 »

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public boolean paused;
public long pauseElapsed, pauseStarted;
public void pause(boolean on) {
   paused = on;
   if (on) {
      pauseStarted = System.currentTimeMillis();
   } else {
      pauseElapsed += System.currentTimeMillis() - pauseStarted;
   }
}
...
if (!paused) {
   millis = System.currentTimeMillis() - startTime - pauseElapsed;
   hours = millis / (1000 * 60 * 60);
   millis -= hours * (1000 * 60 * 60);
   minutes = millis / (1000 * 60);
   millis -= minutes * (1000 * 60);
   seconds = millis / 1000;
}
g.drawString("Time: " + hours + ":" + minutes + ":" + seconds, 300, 10);
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