Issue #22: Minor progress hooking up state manager; still doesn't work and crashes the emulator when triggered. :/

src/main/java/jace/Emulator.java

@@ -46,6 +46,7 @@ public class Emulator {
      * @param args
      */
     public Emulator(List<String> args) {
+        instance = this;
         computer = new Apple2e();
         Configuration.buildTree();
         Configuration.loadSettings();

src/main/java/jace/core/Video.java

@@ -29,10 +29,9 @@ import javafx.scene.image.WritableImage;
  * Generic abstraction of a 560x192 video output device which renders 40 columns
  * per scanline. This also triggers VBL and updates the physical screen.
  * Subclasses are used to manage actual rendering via ScreenWriter
- * implementations.
- * Created on November 10, 2006, 4:29 PM
+ * implementations. Created on November 10, 2006, 4:29 PM
  *
- * @author Brendan Robert (BLuRry) brendan.robert@gmail.com 
+ * @author Brendan Robert (BLuRry) brendan.robert@gmail.com
  */
 @Stateful
 public abstract class Video extends Device {
@@ -90,6 +89,7 @@ public abstract class Video extends Device {
 
     /**
      * Creates a new instance of Video
+     *
      * @param computer
      */
     public Video(Computer computer) {
@@ -99,21 +99,21 @@ public abstract class Video extends Device {
         visible = new WritableImage(560, 192);
         vPeriod = 0;
         hPeriod = 0;
-        forceRefresh();
+        _forceRefresh();
     }
 
     public void setWidth(int w) {
         width = w;
     }
-    
+
     public int getWidth() {
         return width;
     }
-    
+
     public void setHeight(int h) {
         height = h;
     }
-    
+
     public int getHeight() {
         return height;
     }
@@ -136,6 +136,7 @@ public abstract class Video extends Device {
             visible.getPixelWriter().setPixels(0, 0, 560, 192, video.getPixelReader(), 0, 0);
         }
     };
+
     public void redraw() {
         screenDirty = false;
         javafx.application.Platform.runLater(redrawScreen);
@@ -209,8 +210,8 @@ public abstract class Video extends Device {
     abstract public void configureVideoMode();
 
     protected static int byteDoubler(byte b) {
-        int num =
-                // Skip hi-bit because it's not used in display
+        int num
+                = // Skip hi-bit because it's not used in display
                 //                ((b&0x080)<<7) |
                 ((b & 0x040) << 6)
                 | ((b & 0x020) << 5)
@@ -271,18 +272,22 @@ public abstract class Video extends Device {
     }
 
     @InvokableAction(name = "Refresh screen",
-    category = "display",
-    description = "Marks screen contents as changed, forcing full screen redraw",
-    alternatives = "redraw",
-    defaultKeyMapping = {"ctrl+shift+r"})
+            category = "display",
+            description = "Marks screen contents as changed, forcing full screen redraw",
+            alternatives = "redraw",
+            defaultKeyMapping = {"ctrl+shift+r"})
     public static final void forceRefresh() {
         if (Emulator.computer != null && Emulator.computer.video != null) {
-            Emulator.computer.video.lineDirty = true;
-            Emulator.computer.video.screenDirty = true;
-            Emulator.computer.video.forceRedrawRowCount = APPLE_SCREEN_LINES + 1;
+            Emulator.computer.video._forceRefresh();
         }
     }
 
+    private void _forceRefresh() {
+        lineDirty = true;
+        screenDirty = true;
+        forceRedrawRowCount = APPLE_SCREEN_LINES + 1;
+    }
+
     @Override
     public String getShortName() {
         return "vid";

src/main/java/jace/state/State.java

@@ -21,6 +21,7 @@ package jace.state;
 import java.io.Serializable;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.LinkedHashSet;
 import java.util.Set;
 import javafx.scene.image.Image;
 
@@ -78,7 +79,7 @@ public class State extends HashMap<ObjectGraphNode, StateValue> implements Seria
     }
 
     public void apply() {
-        Set<ObjectGraphNode> applied = new HashSet<>();
+        Set<ObjectGraphNode> applied = new LinkedHashSet<>();
         State current = this;
         while (current != null) {
             for (StateValue val : current.values()) {

src/main/java/jace/state/StateManager.java

@@ -21,14 +21,17 @@ package jace.state;
 import jace.Emulator;
 import jace.apple2e.SoftSwitches;
 import jace.config.ConfigurableField;
+import jace.config.InvokableAction;
 import jace.config.Reconfigurable;
 import jace.core.Computer;
 import jace.core.PagedMemory;
+import jace.core.Video;
 import java.awt.image.BufferedImage;
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Field;
 import java.lang.reflect.Type;
 import java.util.HashSet;
+import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -37,6 +40,7 @@ import java.util.logging.Level;
 import java.util.logging.Logger;
 import javafx.scene.image.Image;
 import javafx.scene.image.WritableImage;
+import javafx.scene.input.KeyCode;
 
 /**
  *
@@ -64,12 +68,13 @@ public class StateManager implements Reconfigurable {
     private ObjectGraphNode<BufferedImage> imageGraphNode;
 
     Computer computer;
+
     private StateManager(Computer computer) {
         this.computer = computer;
     }
 
     private void buildStateMap() {
-        allStateVariables = new HashSet<>();
+        allStateVariables = new LinkedHashSet<>();
         objectLookup = new WeakHashMap<>();
         ObjectGraphNode emulator = new ObjectGraphNode(Emulator.instance);
         emulator.name = "Emulator";
@@ -295,7 +300,7 @@ public class StateManager implements Reconfigurable {
 
     public void captureState() {
         // If the state graph is invalidated it means we have to abandon all
-                                // previously captured states.  This helps ensure that rewinding will
+        // previously captured states.  This helps ensure that rewinding will
         // not result in an unintended or invalid state.
         if (!isValid) {
             alphaState = null;
@@ -402,6 +407,17 @@ public class StateManager implements Reconfigurable {
         captureState();
     }
 
+    @InvokableAction(
+            name = "Rewind",
+            alternatives = "Timewarp",
+            description = "Go back 1 second",
+            defaultKeyMapping = {"ctrl+shift+Open Bracket"}
+    )
+    public static void beKindRewind() {
+        StateManager manager = getInstance(Emulator.computer);
+        new Thread(()->manager.rewind(60 / manager.captureFrequency)).start();
+    }
+
     public void rewind(int numStates) {
         boolean resume = computer.pause();
         State state = alphaState.tail;
@@ -412,7 +428,7 @@ public class StateManager implements Reconfigurable {
         state.apply();
         alphaState.tail = state;
         state.nextState = null;
-        computer.getVideo().forceRefresh();
+        Video.forceRefresh();
         System.gc();
         if (resume) {
             computer.resume();