plugins/net.mograsim.logic.core/src/net/mograsim/logic/core/timeline/PauseableTimeFunction.java

   1 package net.mograsim.logic.core.timeline;
   2
   3 import java.util.function.LongSupplier;
   4
   5 public class PauseableTimeFunction implements LongSupplier
   6 {
   7         private boolean paused = false;
   8         private long unpausedSysTime = 0, lastPausedInternalTime = 0;
   9         private double speedFactor = 1;
  10
  11         public void pause()
  12         {
  13                 if (!paused)
  14                 {
  15                         lastPausedInternalTime = getAsLong();
  16                         paused = true;
  17                 }
  18         }
  19
  20         public void unpause()
  21         {
  22                 if (paused)
  23                 {
  24                         paused = false;
  25                         unpausedSysTime = System.currentTimeMillis();
  26                 }
  27         }
  28
  29         @Override
  30         public long getAsLong()
  31         {
  32                 return (long) (paused ? lastPausedInternalTime
  33                                 : lastPausedInternalTime + (System.currentTimeMillis() - unpausedSysTime) * speedFactor);
  34         }
  35
  36         public long simulTimeDeltaToRealTimeMillis(long simulTime)
  37         {
  38                 return paused ? -1 : (long) (simulTime / speedFactor);
  39         }
  40
  41         public void setSpeedFactor(double factor)
  42         {
  43                 if (factor <= 0)
  44                         throw new IllegalArgumentException("time factor can't be smaller than 1");
  45                 if (!paused)
  46                 {
  47                         pause();
  48                         unpause();
  49                 }
  50                 this.speedFactor = factor;
  51         }
  52
  53         public boolean isPaused()
  54         {
  55                 return paused;
  56         }
  57
  58         public void toggle()
  59         {
  60                 if (paused)
  61                         unpause();
  62                 else
  63                         pause();
  64         }
  65 }