avoids swing event queue flodding

src/main/java/de/neemann/digital/core/Model.java

@@ -374,7 +374,7 @@ public class Model implements Iterable<Node>, SyncAccess {
             brVal = new ArrayList<>();
             for (Break b : breaks)
                 brVal.add(new BreakDetector(b));
-            fireEvent(ModelEvent.FASTRUN);
+            fireEvent(ModelEvent.RUN_TO_BREAK);
         }
 
         ObservableValue clkVal = clocks.get(0).getClockOutput();
@@ -392,8 +392,10 @@ public class Model implements Iterable<Node>, SyncAccess {
 
                 if (timeout > 0) {
                     timeout--;
-                    if (timeout == 0)
+                    if (timeout == 0) {
+                        fireEvent(ModelEvent.RUN_TO_BREAK_TIMEOUT);
                         return new BreakInfo(timeout);
+                    }
                 }
             }
         } catch (Exception e) {
@@ -418,7 +420,7 @@ public class Model implements Iterable<Node>, SyncAccess {
             if (clocks.size() == 1)
                 clkVal = clocks.get(0).getClockOutput();
 
-            fireEvent(ModelEvent.FASTRUN);
+            fireEvent(ModelEvent.RUN_TO_BREAK);
             final boolean[] wasBreak = {false};
             while (!wasBreak[0] && state != State.CLOSED) {
                 if (!needsUpdate()) {

src/main/java/de/neemann/digital/core/ModelEvent.java

@@ -36,9 +36,13 @@ public class ModelEvent {
      */
     public static final ModelEvent MICROSTEP = new ModelEvent(ModelEventType.MICROSTEP);
     /**
-     * Shorthand for a ModelEventType.FASTRUN event
+     * Shorthand for a ModelEventType.RUN_TO_BREAK event
      */
-    public static final ModelEvent FASTRUN = new ModelEvent(ModelEventType.FASTRUN);
+    public static final ModelEvent RUN_TO_BREAK = new ModelEvent(ModelEventType.RUN_TO_BREAK);
+    /**
+     * Shorthand for a ModelEventType.RUN_TO_BREAK_TIMEOUT event
+     */
+    public static final ModelEvent RUN_TO_BREAK_TIMEOUT = new ModelEvent(ModelEventType.RUN_TO_BREAK_TIMEOUT);
     /**
      * Shorthand for a ModelEventType.BREAK event
      */

src/main/java/de/neemann/digital/core/ModelEventType.java

@@ -35,7 +35,12 @@ public enum ModelEventType {
     /**
      * Fast run is started.
      */
-    FASTRUN,
+    RUN_TO_BREAK,
+
+    /**
+     * Fast run timeout has occurred.
+     */
+    RUN_TO_BREAK_TIMEOUT,
 
     /**
      * A break is detected.
@@ -58,5 +63,4 @@ public enum ModelEventType {
      * Used to notify an error
      */
     ERROR_OCCURRED
-
 }

src/main/java/de/neemann/digital/gui/Main.java

@@ -1202,7 +1202,7 @@ public final class Main extends JFrame implements ClosingWindowListener.ConfirmS
                 tc.getTestCaseDescription().setNewSeed();
 
             windowPosManager.register("testResult", new ValueTableDialog(Main.this, Lang.get("msg_testResult"))
-                    .addTestResult(tsl, circuitComponent.getCircuit(), library))
+                            .addTestResult(tsl, circuitComponent.getCircuit(), library))
                     .setVisible(true);
 
             ensureModelIsStopped();
@@ -1733,15 +1733,26 @@ public final class Main extends JFrame implements ClosingWindowListener.ConfirmS
      * Updates the graphic at every modification.
      */
     private class UpdateViewAtEvent implements ModelStateObserverTyped {
+        private boolean stepUpdateEnabled;
+
         UpdateViewAtEvent() {
+            stepUpdateEnabled = true;
         }
 
         @Override
         public void handleEvent(ModelEvent event) {
             switch (event.getType()) {
+                case RUN_TO_BREAK:
+                    stepUpdateEnabled = false;
+                    break;
                 case CHECKBURN:
-                case STEP:
                 case BREAK:
+                    stepUpdateEnabled = true;
+                case STEP:
+                    if (stepUpdateEnabled)
+                        circuitComponent.graphicHasChanged();
+                    break;
+                case RUN_TO_BREAK_TIMEOUT:
                     circuitComponent.graphicHasChanged();
                     break;
             }
@@ -2238,8 +2249,11 @@ public final class Main extends JFrame implements ClosingWindowListener.ConfirmS
                 long time = System.currentTimeMillis();
                 Model.BreakInfo info = model.runToBreak(steps);
                 time = System.currentTimeMillis() - time;
-                int newSteps = (int) (steps * 250 / time);
+                System.out.println(time + ", " + steps);
-                steps = (steps + newSteps) / 2;
+                if (time > 0) {
+                    int newSteps = (int) (steps * 250 / time);
+                    steps = (steps + newSteps) / 2;
+                }
 
                 if (info != null) {
                     if (info.isTimeout() && model.isRunning())

src/main/java/de/neemann/digital/gui/components/ProbeDialog.java

@@ -120,7 +120,7 @@ public class ProbeDialog extends JDialog implements ModelStateObserverTyped {
             }
         }
         switch (event.getType()) {
-            case FASTRUN:
+            case RUN_TO_BREAK:
                 tableUpdateEnable = false;
                 break;
             case BREAK:
@@ -133,7 +133,7 @@ public class ProbeDialog extends JDialog implements ModelStateObserverTyped {
 
     @Override
     public ModelEventType[] getEvents() {
-        return new ModelEventType[]{type, ModelEventType.CHECKBURN, ModelEventType.FASTRUN, ModelEventType.BREAK, ModelEventType.CLOSED};
+        return new ModelEventType[]{type, ModelEventType.CHECKBURN, ModelEventType.RUN_TO_BREAK, ModelEventType.BREAK, ModelEventType.CLOSED};
     }
 
     private static class SignalTableModel implements TableModel {