Simulation can now be slowed and paused

[Mograsim.git] / plugins / net.mograsim.logic.core / src / net / mograsim / logic / core / timeline / PauseableTimeFunction.java

diff --git a/plugins/net.mograsim.logic.core/src/net/mograsim/logic/core/timeline/PauseableTimeFunction.java b/plugins/net.mograsim.logic.core/src/net/mograsim/logic/core/timeline/PauseableTimeFunction.java
new file mode 100644 (file)
index 0000000..86f4ce9
--- /dev/null
+++ b/plugins/net.mograsim.logic.core/src/net/mograsim/logic/core/timeline/PauseableTimeFunction.java
@@ -0,0 +1,58 @@
+package net.mograsim.logic.core.timeline;
+
+import java.util.function.LongSupplier;
+
+public class PauseableTimeFunction implements LongSupplier
+{
+       private boolean paused = false;
+       private long unpausedSysTime = 0, lastPausedInternalTime = 0;
+       private int speedPercentage = 100;
+
+       public void pause()
+       {
+               if (!paused)
+               {
+                       lastPausedInternalTime = getAsLong();
+                       paused = true;
+               }
+       }
+
+       public void unpause()
+       {
+               if (paused)
+               {
+                       paused = false;
+                       unpausedSysTime = System.currentTimeMillis();
+               }
+       }
+
+       @Override
+       public long getAsLong()
+       {
+               return paused ? lastPausedInternalTime
+                               : lastPausedInternalTime + ((System.currentTimeMillis() - unpausedSysTime) * speedPercentage) / 100;
+       }
+
+       public void setSpeedPercentage(int percentage)
+       {
+               if (!paused)
+               {
+                       pause();
+                       unpause();
+               }
+               this.speedPercentage = Integer.min(100, Integer.max(percentage, 1));
+       }
+
+       public boolean isPaused()
+       {
+               return paused;
+       }
+
+       public void toggle()
+       {
+               if (paused)
+                       unpause();
+               else
+                       pause();
+       }
+}