Refactored code a little, cheats are now editable and support javascript expressions. Almost done now! :-D

src/main/java/jace/cheat/DynamicCheat.java

@@ -0,0 +1,99 @@
+package jace.cheat;
+
+import jace.core.RAMEvent;
+import jace.core.RAMListener;
+import javafx.beans.property.BooleanProperty;
+import javafx.beans.property.IntegerProperty;
+import javafx.beans.property.SimpleBooleanProperty;
+import javafx.beans.property.SimpleIntegerProperty;
+import javafx.beans.property.SimpleStringProperty;
+import javafx.beans.property.StringProperty;
+import javafx.util.Callback;
+import javax.script.ScriptException;
+
+/**
+ *
+ * @author blurry
+ */
+public class DynamicCheat extends RAMListener {
+    int id;
+    IntegerProperty addr;
+    StringProperty expression;
+    BooleanProperty active;
+    StringProperty name;
+    Callback<RAMEvent, Integer> expressionCallback;
+
+    public DynamicCheat(int address, String expr) {
+        super(RAMEvent.TYPE.ANY, RAMEvent.SCOPE.ADDRESS, RAMEvent.VALUE.ANY);
+        id = (int) (Math.random() * 10000000);
+        addr = new SimpleIntegerProperty(address);
+        expression = new SimpleStringProperty(expr);
+        active = new SimpleBooleanProperty(true);
+        name = new SimpleStringProperty("Untitled");
+        expression.addListener((param, oldValue, newValue) -> {
+            expressionCallback = parseExpression(newValue);
+        });
+        expressionCallback = parseExpression(expr);
+        doConfig();
+    }
+
+    @Override
+    protected void doConfig() {
+        if (addr != null) {
+            setScopeStart(addr.getValue());
+        }
+    }
+
+    @Override
+    protected void doEvent(RAMEvent e) {
+        if (active.get() && expressionCallback != null) {
+            Integer newVal = expressionCallback.call(e);
+            if (newVal != null) {
+                e.setNewValue(newVal);
+            } else {
+                active.set(false);
+                expressionCallback = null;
+            }
+        }
+    }
+
+    public BooleanProperty activeProperty() {
+        return active;
+    }
+
+    public StringProperty nameProperty() {
+        return name;
+    }
+
+    public IntegerProperty addressProperty() {
+        return addr;
+    }
+
+    public StringProperty expressionProperty() {
+        return expression;
+    }
+
+    private Callback<RAMEvent, Integer> parseExpression(String expr) {
+        String functionName = "processCheat" + id;
+        String functionBody = "function " + functionName + "(old,val){" + (expr.contains("return") ? expr : "return " + expr) + "}";
+        try {
+            MetaCheat.NASHORN_ENGINE.eval(functionBody);
+            return (RAMEvent e) -> {
+                try {
+                    Object result = MetaCheat.NASHORN_INVOCABLE.invokeFunction(functionName, e.getOldValue(), e.getNewValue());
+                    if (result instanceof Number) {
+                        return ((Number) result).intValue();
+                    } else {
+                        System.err.println("Not able to handle non-numeric return value: " + result.getClass());
+                        return null;
+                    }
+                } catch (ScriptException | NoSuchMethodException ex) {
+                    return null;
+                }
+            };
+        } catch (ScriptException ex) {
+            return null;
+        }
+    }
+    
+}

src/main/java/jace/cheat/MemoryCell.java

@@ -0,0 +1,75 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package jace.cheat;
+
+import java.util.ArrayList;
+import javafx.beans.property.IntegerProperty;
+import javafx.beans.property.SimpleIntegerProperty;
+import javafx.beans.value.ChangeListener;
+import javafx.beans.value.ObservableValue;
+import javafx.collections.FXCollections;
+import javafx.collections.ObservableList;
+
+/**
+ *
+ * @author blurry
+ */
+public class MemoryCell implements Comparable<MemoryCell> {
+    public static ChangeListener<MemoryCell> listener;
+    public int address;
+    public IntegerProperty value = new SimpleIntegerProperty();
+    public IntegerProperty readCount = new SimpleIntegerProperty();
+    public IntegerProperty execCount = new SimpleIntegerProperty();
+    public IntegerProperty writeCount = new SimpleIntegerProperty();
+    public ObservableList<Integer> readInstructions = FXCollections.observableList(new ArrayList<>());
+    public ObservableList<Integer> writeInstructions = FXCollections.observableList(new ArrayList<>());
+    private int x;
+    private int y;
+    private int width;
+    private int height;
+
+    public static void setListener(ChangeListener<MemoryCell> l) {
+        listener = l;
+    }
+
+    public MemoryCell() {
+        ChangeListener<Number> changeListener = (ObservableValue<? extends Number> val, Number oldVal, Number newVal) -> {
+            if (listener != null) {
+                listener.changed(null, this, this);
+            }
+        };
+        value.addListener(changeListener);
+    }
+
+    public void setRect(int x, int y, int w, int h) {
+        this.x = x;
+        this.y = y;
+        this.width = w;
+        this.height = h;
+    }
+
+    public int getX() {
+        return x;
+    }
+
+    public int getY() {
+        return y;
+    }
+
+    public int getWidth() {
+        return width;
+    }
+
+    public int getHeight() {
+        return height;
+    }
+
+    @Override
+    public int compareTo(MemoryCell o) {
+        return address - o.address;
+    }
+    
+}

src/main/java/jace/cheat/MetaCheat.java

@@ -8,23 +8,25 @@ import jace.core.RAMEvent;
 import jace.core.RAMListener;
 import jace.state.State;
 import jace.ui.MetacheatUI;
-import java.util.ArrayList;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 import javafx.beans.property.BooleanProperty;
-import javafx.beans.property.IntegerProperty;
 import javafx.beans.property.Property;
 import javafx.beans.property.SimpleBooleanProperty;
-import javafx.beans.property.SimpleIntegerProperty;
 import javafx.beans.property.SimpleStringProperty;
 import javafx.beans.property.StringProperty;
-import javafx.beans.value.ChangeListener;
 import javafx.beans.value.ObservableValue;
 import javafx.collections.FXCollections;
 import javafx.collections.ObservableList;
+import javax.script.Invocable;
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineManager;
 
 public class MetaCheat extends Cheats {
 
+    static final ScriptEngine NASHORN_ENGINE = new ScriptEngineManager().getEngineByName("nashorn");
+    static Invocable NASHORN_INVOCABLE = (Invocable) NASHORN_ENGINE;
+
     public static enum SearchType {
         VALUE, TEXT, CHANGE
     }
@@ -33,62 +35,6 @@ public class MetaCheat extends Cheats {
         NO_CHANGE, ANY_CHANGE, LESS, GREATER, AMOUNT
     }
 
-    public static class MemoryCell implements Comparable<MemoryCell> {
-
-        public static ChangeListener<MemoryCell> listener;
-        public int address;
-        public IntegerProperty value = new SimpleIntegerProperty();
-        public IntegerProperty readCount = new SimpleIntegerProperty();
-        public IntegerProperty execCount = new SimpleIntegerProperty();
-        public IntegerProperty writeCount = new SimpleIntegerProperty();
-        public ObservableList<Integer> readInstructions = FXCollections.observableList(new ArrayList<>());
-        public ObservableList<Integer> writeInstructions = FXCollections.observableList(new ArrayList<>());
-        private int x;
-        private int y;
-        private int width;
-        private int height;
-
-        public static void setListener(ChangeListener<MemoryCell> l) {
-            listener = l;
-        }
-
-        public MemoryCell() {
-            ChangeListener<Number> changeListener = (ObservableValue<? extends Number> val, Number oldVal, Number newVal) -> {
-                if (listener != null) {
-                    listener.changed(null, this, this);
-                }
-            };
-            value.addListener(changeListener);
-        }
-
-        public void setRect(int x, int y, int w, int h) {
-            this.x = x;
-            this.y = y;
-            this.width = w;
-            this.height = h;
-        }
-
-        public int getX() {
-            return x;
-        }
-
-        public int getY() {
-            return y;
-        }
-
-        public int getWidth() {
-            return width;
-        }
-
-        public int getHeight() {
-            return height;
-        }
-
-        @Override
-        public int compareTo(MemoryCell o) {
-            return address - o.address;
-        }
-    }
 
     public static class SearchResult {
 
@@ -106,42 +52,6 @@ public class MetaCheat extends Cheats {
         }
     }
 
-    public static class Cheat extends RAMListener {
-        IntegerProperty addr;
-        IntegerProperty val;
-        BooleanProperty active;
-
-        public Cheat(int address, int value) {
-            super(RAMEvent.TYPE.ANY, RAMEvent.SCOPE.ADDRESS, RAMEvent.VALUE.ANY);
-            addr = new SimpleIntegerProperty(address);
-            val = new SimpleIntegerProperty(value);
-            active = new SimpleBooleanProperty(true);
-            setScopeStart(address);
-        }
-
-        @Override
-        protected void doConfig() {
-        }
-
-        @Override
-        protected void doEvent(RAMEvent e) {
-            if (active.get()) {
-                e.setNewValue(val.get());
-            }
-        }
-
-        public BooleanProperty activeProperty() {
-            return active;
-        }
-        
-        public IntegerProperty addressProperty() {
-            return addr;
-        }
-        
-        public IntegerProperty valueProperty() {
-            return val;
-        }
-    }
 
     MetacheatUI ui;
 
@@ -159,7 +69,7 @@ public class MetaCheat extends Cheats {
     private final BooleanProperty signedProperty = new SimpleBooleanProperty(false);
     private final StringProperty searchValueProperty = new SimpleStringProperty("0");
     private final StringProperty changeByProperty = new SimpleStringProperty("0");
-    private final ObservableList<Cheat> cheatList = FXCollections.observableArrayList();
+    private final ObservableList<DynamicCheat> cheatList = FXCollections.observableArrayList();
     private final ObservableList<SearchResult> resultList = FXCollections.observableArrayList();
     private final ObservableList<State> snapshotList = FXCollections.observableArrayList();
 
@@ -194,14 +104,14 @@ public class MetaCheat extends Cheats {
         }
         if (s.matches("(\\+|-)?[0-9]+")) {
             return Integer.parseInt(s);
-        } else if (s.matches("(\\+|-)?[0-9a-fA-F]+")) {
+        } else {
-            return Integer.parseInt(s.toUpperCase(), 16);
-        } else if (s.matches("(\\+|-)?(x|$)[0-9a-fA-F]+")) {
             String upper = s.toUpperCase();
             boolean positive = true;
             if (upper.startsWith("-")) {
                 positive = false;
+                upper = upper.substring(1);
             }
+            
             for (int i = 0; i < upper.length(); i++) {
                 char c = upper.charAt(i);
                 if ((c >= '0' && c <= '9') || (c >= 'A' & c <= 'F')) {
@@ -220,10 +130,15 @@ public class MetaCheat extends Cheats {
     void registerListeners() {
     }
 
-    public void addCheat(Cheat cheat) {
+    public void addCheat(DynamicCheat cheat) {
         cheat.activeProperty().set(true);
         cheatList.add(cheat);
         computer.getMemory().addListener(cheat);
+        cheat.addressProperty().addListener((prop, oldVal, newVal)->{
+            computer.getMemory().removeListener(cheat);
+            cheat.doConfig();
+            computer.getMemory().addListener(cheat);
+        });
     }
 
     @Override
@@ -282,7 +197,7 @@ public class MetaCheat extends Cheats {
         return changeByProperty;
     }
 
-    public ObservableList<Cheat> getCheats() {
+    public ObservableList<DynamicCheat> getCheats() {
         return cheatList;
     }
 
@@ -384,7 +299,7 @@ public class MetaCheat extends Cheats {
     public void tick() {
         if (fadeCounter-- <= 0) {
             fadeCounter = FADE_TIMER_VALUE;
-            memoryCells.values().stream().forEach((cell) -> {
+            memoryCells.values().stream().forEach((jace.cheat.MemoryCell cell) -> {
                 boolean change = false;
                 if (cell.execCount.get() > 0) {
                     cell.execCount.set(Math.max(0, cell.execCount.get() - fadeRate));

src/main/java/jace/ui/MetacheatUI.java

@@ -2,16 +2,14 @@ package jace.ui;
 
 import com.sun.glass.ui.Application;
 import jace.Emulator;
+import jace.cheat.DynamicCheat;
+import jace.cheat.MemoryCell;
 import jace.cheat.MetaCheat;
-import jace.cheat.MetaCheat.Cheat;
 import jace.cheat.MetaCheat.SearchChangeType;
 import jace.cheat.MetaCheat.SearchType;
 import jace.core.RAMListener;
 import jace.state.State;
-import java.util.ArrayList;
-import java.util.Collections;
 import java.util.HashSet;
-import java.util.List;
 import java.util.Set;
 import java.util.concurrent.ConcurrentSkipListSet;
 import java.util.concurrent.ScheduledExecutorService;
@@ -19,7 +17,6 @@ import java.util.concurrent.ScheduledFuture;
 import java.util.concurrent.ScheduledThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
 import javafx.application.Platform;
-import javafx.beans.property.BooleanProperty;
 import javafx.beans.value.ChangeListener;
 import javafx.beans.value.ObservableValue;
 import javafx.collections.FXCollections;
@@ -35,22 +32,21 @@ import javafx.scene.control.ListView;
 import javafx.scene.control.RadioButton;
 import javafx.scene.control.ScrollPane;
 import javafx.scene.control.TabPane;
+import javafx.scene.control.TableColumn;
 import javafx.scene.control.TableView;
 import javafx.scene.control.TextField;
 import javafx.scene.control.Toggle;
 import javafx.scene.control.ToggleGroup;
 import javafx.scene.control.Tooltip;
+import javafx.scene.control.cell.CheckBoxTableCell;
 import javafx.scene.control.cell.PropertyValueFactory;
+import javafx.scene.control.cell.TextFieldTableCell;
 import javafx.scene.input.MouseEvent;
-import javafx.scene.layout.Background;
-import javafx.scene.layout.BackgroundFill;
-import javafx.scene.layout.CornerRadii;
 import javafx.scene.layout.StackPane;
 import javafx.scene.layout.TilePane;
-import javafx.scene.layout.VBox;
 import javafx.scene.paint.Color;
-import javafx.scene.text.Font;
+import javafx.util.converter.DefaultStringConverter;
-import javafx.scene.text.TextAlignment;
+import javafx.util.converter.IntegerStringConverter;
 
 public class MetacheatUI {
 
@@ -127,7 +123,7 @@ public class MetacheatUI {
     private ListView<State> snapshotsListView;
 
     @FXML
-    private TableView<Cheat> cheatsTableView;
+    private TableView<DynamicCheat> cheatsTableView;
 
     @FXML
     void addCheat(ActionEvent event) {
@@ -271,12 +267,36 @@ public class MetacheatUI {
 
         searchStartAddressField.textProperty().addListener(addressRangeListener);
         searchEndAddressField.textProperty().addListener(addressRangeListener);
-        
+
         RAMListener l;
-        
+
-        cheatsTableView.getColumns().get(0).setCellValueFactory(new PropertyValueFactory<>("active"));
+        TableColumn<DynamicCheat, Boolean> activeColumn = (TableColumn<DynamicCheat, Boolean>) cheatsTableView.getColumns().get(0);
-        cheatsTableView.getColumns().get(1).setCellValueFactory(new PropertyValueFactory<>("address"));
+        activeColumn.setCellValueFactory(new PropertyValueFactory<>("active"));
-        cheatsTableView.getColumns().get(2).setCellValueFactory(new PropertyValueFactory<>("value"));
+        activeColumn.setCellFactory((TableColumn<DynamicCheat, Boolean> param) -> new CheckBoxTableCell<>());
+
+        TableColumn<DynamicCheat, String> nameColumn = (TableColumn<DynamicCheat, String>) cheatsTableView.getColumns().get(1);
+        nameColumn.setCellValueFactory(new PropertyValueFactory<>("name"));
+        nameColumn.setCellFactory((TableColumn<DynamicCheat, String> param) -> new TextFieldTableCell<>(new DefaultStringConverter()));
+
+        TableColumn<DynamicCheat, Integer> addrColumn = (TableColumn<DynamicCheat, Integer>) cheatsTableView.getColumns().get(2);
+        addrColumn.setCellValueFactory(new PropertyValueFactory<>("address"));
+        addrColumn.setCellFactory((TableColumn<DynamicCheat, Integer> param) -> {
+            return new TextFieldTableCell<>(new IntegerStringConverter(){
+                @Override
+                public String toString(Integer value) {
+                    return "$"+Integer.toHexString(value);
+                }
+                
+                @Override
+                public Integer fromString(String value) {
+                    return cheatEngine.parseInt(value);
+                }
+            });
+        });
+
+        TableColumn<DynamicCheat, String> exprColumn = (TableColumn<DynamicCheat, String>) cheatsTableView.getColumns().get(3);
+        exprColumn.setCellValueFactory(new PropertyValueFactory<>("expression"));
+        exprColumn.setCellFactory((TableColumn<DynamicCheat, String> param) -> new TextFieldTableCell<>(new DefaultStringConverter()));
     }
     MetaCheat cheatEngine = null;
 
@@ -303,7 +323,7 @@ public class MetacheatUI {
     public int memoryViewColumns;
     public int memoryViewRows;
 
-    public static Set<MetaCheat.MemoryCell> redrawNodes = new ConcurrentSkipListSet<>();
+    public static Set<MemoryCell> redrawNodes = new ConcurrentSkipListSet<>();
     ScheduledExecutorService animationTimer = null;
     ScheduledFuture animationFuture = null;
     StackPane pane = new StackPane();
@@ -322,7 +342,7 @@ public class MetacheatUI {
             int col = (int) (x / MEMORY_BOX_TOTAL_SIZE);
             int row = (int) (y / MEMORY_BOX_TOTAL_SIZE);
             int addr = cheatEngine.getStartAddress() + row * memoryViewColumns + col;
-            Watch watch = new Watch(addr);
+            Watch watch = new Watch(addr, this);
 
             Label addWatch = new Label("Watch >>");
             addWatch.setOnMouseClicked((mouseEvent) -> {
@@ -353,9 +373,9 @@ public class MetacheatUI {
     private void processMemoryViewUpdates() {
         Application.invokeLater(() -> {
             GraphicsContext context = memoryViewCanvas.getGraphicsContext2D();
-            Set<MetaCheat.MemoryCell> draw = new HashSet<>(redrawNodes);
+            Set<MemoryCell> draw = new HashSet<>(redrawNodes);
             redrawNodes.clear();
-            draw.stream().forEach((cell) -> {
+            draw.stream().forEach((jace.cheat.MemoryCell cell) -> {
                 if (showValuesCheckbox.isSelected()) {
                     int val = cell.value.get() & 0x0ff;
                     context.setFill(Color.rgb(val, val, val));
@@ -401,11 +421,11 @@ public class MetacheatUI {
         for (int addr = cheatEngine.getStartAddress(); addr <= cheatEngine.getEndAddress(); addr++) {
             int col = (addr - cheatEngine.getStartAddress()) % memoryViewColumns;
             int row = (addr - cheatEngine.getStartAddress()) / memoryViewColumns;
-            MetaCheat.MemoryCell cell = cheatEngine.getMemoryCell(addr);
+            MemoryCell cell = cheatEngine.getMemoryCell(addr);
             cell.setRect(col * MEMORY_BOX_TOTAL_SIZE, row * MEMORY_BOX_TOTAL_SIZE, MEMORY_BOX_SIZE, MEMORY_BOX_SIZE);
             redrawNodes.add(cell);
         }
-        MetaCheat.MemoryCell.setListener((prop, oldCell, newCell) -> {
+        MemoryCell.setListener((javafx.beans.value.ObservableValue<? extends jace.cheat.MemoryCell> prop, jace.cheat.MemoryCell oldCell, jace.cheat.MemoryCell newCell) -> {
             redrawNodes.add(newCell);
         });
 
@@ -446,7 +466,7 @@ public class MetacheatUI {
     }
 
     private Watch addWatch(int addr) {
-        Watch watch = new Watch(addr);
+        Watch watch = new Watch(addr, this);
         watch.setPadding(new Insets(5));
         watch.setOpaqueInsets(new Insets(10));
 
@@ -470,100 +490,7 @@ public class MetacheatUI {
     }
 
     private void addCheat(int addr, int val) {
-        cheatEngine.addCheat(new Cheat(addr, val));
+        cheatEngine.addCheat(new DynamicCheat(addr, String.valueOf(val)));
     }
 
-    private static final int GRAPH_WIDTH = 50;
-    private static final double GRAPH_HEIGHT = 50;
-
-    private class Watch extends VBox {
-
-        int address;
-        ScheduledFuture redraw;
-        Canvas graph;
-        List<Integer> samples = Collections.synchronizedList(new ArrayList<>());
-        int value = 0;
-        BooleanProperty holding = null;
-
-        public Watch(int address) {
-            super();
-            this.address = address;
-            redraw = animationTimer.scheduleAtFixedRate(this::redraw, FRAME_RATE, FRAME_RATE, TimeUnit.MILLISECONDS);
-
-            setBackground(new Background(new BackgroundFill(Color.NAVY, CornerRadii.EMPTY, Insets.EMPTY)));
-            Label addrLabel = new Label("$" + Integer.toHexString(address));
-            addrLabel.setTextAlignment(TextAlignment.CENTER);
-            addrLabel.setMinWidth(GRAPH_WIDTH);
-            addrLabel.setFont(new Font(Font.getDefault().getFamily(), 14));
-            addrLabel.setTextFill(Color.WHITE);
-            graph = new Canvas(GRAPH_WIDTH, GRAPH_HEIGHT);
-            getChildren().add(addrLabel);
-            getChildren().add(graph);
-
-            CheckBox hold = new CheckBox("Hold");
-            holding = hold.selectedProperty();
-            holding.addListener((prop, oldVal, newVal) -> this.updateHold());
-
-            getChildren().add(hold);
-            hold.setTextFill(Color.WHITE);
-        }
-
-        public int getValue() {
-            return value;
-        }
-
-        public void redraw() {
-            int val = cheatEngine.getMemoryCell(address).value.get() & 0x0ff;
-            if (!holding.get()) {
-                value = val;
-            }
-            if (samples.size() >= GRAPH_WIDTH) {
-                samples.remove(0);
-            }
-            samples.add(val);
-
-            Platform.runLater(() -> {
-                GraphicsContext g = graph.getGraphicsContext2D();
-                g.setFill(Color.BLACK);
-                g.fillRect(0, 0, GRAPH_WIDTH, GRAPH_HEIGHT);
-
-                if (samples.size() > 1) {
-                    g.setLineWidth(1);
-                    g.setStroke(Color.LAWNGREEN);
-                    int y = (int) (GRAPH_HEIGHT - ((samples.get(0) / 255.0) * GRAPH_HEIGHT));
-                    g.beginPath();
-                    g.moveTo(0, y);
-                    for (int i = 1; i < samples.size(); i++) {
-                        y = (int) (GRAPH_HEIGHT - ((samples.get(i) / 255.0) * GRAPH_HEIGHT));
-                        g.lineTo(i, y);
-                    }
-                    g.stroke();
-                }
-                g.beginPath();
-                g.setStroke(Color.WHITE);
-                g.strokeText(String.valueOf(val), GRAPH_WIDTH - 25, GRAPH_HEIGHT - 5);
-            });
-        }
-
-        RAMListener holdListener;
-
-        public BooleanProperty holdingProperty() {
-            return holding;
-        }
-
-        private void updateHold() {
-            if (!holding.get()) {
-                cheatEngine.removeListener(holdListener);
-                holdListener = null;
-            } else {
-                value = Emulator.computer.memory.readRaw(address) & 0x0ff;
-                holdListener = cheatEngine.forceValue(value, address);
-            }
-        }
-
-        public void disconnect() {
-            holding.set(false);
-            redraw.cancel(false);
-        }
-    }
 }

src/main/java/jace/ui/Watch.java

@@ -0,0 +1,121 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package jace.ui;
+
+import jace.Emulator;
+import jace.core.RAMListener;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.ScheduledFuture;
+import java.util.concurrent.TimeUnit;
+import javafx.application.Platform;
+import javafx.beans.property.BooleanProperty;
+import javafx.geometry.Insets;
+import javafx.scene.canvas.Canvas;
+import javafx.scene.canvas.GraphicsContext;
+import javafx.scene.control.CheckBox;
+import javafx.scene.control.Label;
+import javafx.scene.layout.Background;
+import javafx.scene.layout.BackgroundFill;
+import javafx.scene.layout.CornerRadii;
+import javafx.scene.layout.VBox;
+import javafx.scene.paint.Color;
+import javafx.scene.text.Font;
+import javafx.scene.text.TextAlignment;
+
+/**
+ *
+ * @author blurry
+ */
+class Watch extends VBox {
+    private static final int GRAPH_WIDTH = 50;
+    private static final double GRAPH_HEIGHT = 50;
+    int address;
+    ScheduledFuture redraw;
+    Canvas graph;
+    List<Integer> samples = Collections.synchronizedList(new ArrayList<>());
+    int value = 0;
+    BooleanProperty holding = null;
+    private final MetacheatUI outer;
+
+    public Watch(int address, final MetacheatUI outer) {
+        super();
+        this.outer = outer;
+        this.address = address;
+        redraw = outer.animationTimer.scheduleAtFixedRate(this::redraw, MetacheatUI.FRAME_RATE, MetacheatUI.FRAME_RATE, TimeUnit.MILLISECONDS);
+        setBackground(new Background(new BackgroundFill(Color.NAVY, CornerRadii.EMPTY, Insets.EMPTY)));
+        Label addrLabel = new Label("$" + Integer.toHexString(address));
+        addrLabel.setTextAlignment(TextAlignment.CENTER);
+        addrLabel.setMinWidth(GRAPH_WIDTH);
+        addrLabel.setFont(new Font(Font.getDefault().getFamily(), 14));
+        addrLabel.setTextFill(Color.WHITE);
+        graph = new Canvas(GRAPH_WIDTH, GRAPH_HEIGHT);
+        getChildren().add(addrLabel);
+        getChildren().add(graph);
+        CheckBox hold = new CheckBox("Hold");
+        holding = hold.selectedProperty();
+        holding.addListener((prop, oldVal, newVal) -> this.updateHold());
+        getChildren().add(hold);
+        hold.setTextFill(Color.WHITE);
+    }
+
+    public int getValue() {
+        return value;
+    }
+
+    public void redraw() {
+        int val = outer.cheatEngine.getMemoryCell(address).value.get() & 0x0ff;
+        if (!holding.get()) {
+            value = val;
+        }
+        if (samples.size() >= GRAPH_WIDTH) {
+            samples.remove(0);
+        }
+        samples.add(val);
+        Platform.runLater(() -> {
+            GraphicsContext g = graph.getGraphicsContext2D();
+            g.setFill(Color.BLACK);
+            g.fillRect(0, 0, GRAPH_WIDTH, GRAPH_HEIGHT);
+            if (samples.size() > 1) {
+                g.setLineWidth(1);
+                g.setStroke(Color.LAWNGREEN);
+                int y = (int) (GRAPH_HEIGHT - ((samples.get(0) / 255.0) * GRAPH_HEIGHT));
+                g.beginPath();
+                g.moveTo(0, y);
+                for (int i = 1; i < samples.size(); i++) {
+                    y = (int) (GRAPH_HEIGHT - ((samples.get(i) / 255.0) * GRAPH_HEIGHT));
+                    g.lineTo(i, y);
+                }
+                g.stroke();
+            }
+            g.beginPath();
+            g.setStroke(Color.WHITE);
+            g.strokeText(String.valueOf(val), GRAPH_WIDTH - 25, GRAPH_HEIGHT - 5);
+        });
+    }
+    RAMListener holdListener;
+
+    public BooleanProperty holdingProperty() {
+        return holding;
+    }
+
+    private void updateHold() {
+        if (!holding.get()) {
+            outer.cheatEngine.removeListener(holdListener);
+            holdListener = null;
+        } else {
+            value = Emulator.computer.memory.readRaw(address) & 0x0ff;
+            holdListener = outer.cheatEngine.forceValue(value, address);
+        }
+    }
+
+    public void disconnect() {
+        holding.set(false);
+        redraw.cancel(false);
+    }
+    
+}

src/main/resources/fxml/Metacheat.fxml

@@ -31,7 +31,7 @@
                      </children>
                   </StackPane>
                </content></ScrollPane>
-            <Accordion>
+            <Accordion centerShape="false" scaleShape="false">
               <panes>
                   <TitledPane prefHeight="200.0" prefWidth="200.0" text="Search">
                      <content>
@@ -198,12 +198,16 @@
                               </ToolBar>
                            </bottom>
                            <center>
-                              <TableView fx:id="cheatsTableView" prefHeight="321.0" prefWidth="207.0" BorderPane.alignment="CENTER">
+                              <TableView fx:id="cheatsTableView" editable="true" prefHeight="321.0" prefWidth="207.0" BorderPane.alignment="CENTER">
                                 <columns>
-                                    <TableColumn prefWidth="35.0" text="On" />
+                                    <TableColumn prefWidth="26.0" sortable="false" text="On" />
-                                  <TableColumn prefWidth="63.0" text="Address" />
+                                    <TableColumn prefWidth="74.0" text="Name" />
-                                  <TableColumn prefWidth="127.0" text="Effect" />
+                                  <TableColumn prefWidth="50.0" text="Addr" />
+                                  <TableColumn prefWidth="84.0" text="Effect" />
                                 </columns>
+                                 <columnResizePolicy>
+                                    <TableView fx:constant="CONSTRAINED_RESIZE_POLICY" />
+                                 </columnResizePolicy>
                               </TableView>
                            </center>
                         </BorderPane>