first crack at a playback slider

assignments/a2/src/main/java/Controls.java

@@ -6,6 +6,7 @@ import javax.swing.*;
 public class Controls extends JPanel implements Observer
 {
   private Model model;
+  private JSlider playback;
 
   // Bob the Builder this shit
   public Controls(Model model, Handler handler)
@@ -13,17 +14,25 @@ public class Controls extends JPanel implements Observer
     // Hook up this observer so that it will be notified when the model
     // changes.
     this.model = model;
-    this.setPreferredSize(new Dimension(300, 30));
+    this.setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
     this.setPreferredSize(new Dimension(1280,75));
 		this.setMinimumSize(new Dimension(320, 75));
+		this.playback = new JSlider(1, model.getThingies().size(), model.getThingies().size());
+    this.playback.addChangeListener(new ChangeListener()
+    {
+      public void stateChanged(ChangeEvent e)
+      {
+        model.changeThingy(playback.getValue() - 1);
+      }
+    });
+    this.playback.setPreferredSize(new Dimension(280, 75));
+    this.add(playback);
     model.addObserver(this);
   }
 
-  /**
-  * Update with data from the model.
-  */
   public void update(Object observable)
   {
+    this.playback.setMaximum(model.getThingies().size());
     this.setBackground(model.controlColour);
     revalidate();
     repaint();

assignments/a2/src/main/java/Model.java

@@ -46,6 +46,14 @@ public class Model extends Observable
     return thingies;
   }
   
+  public void changeThingy(int x)
+  {
+    curThingy = thingies.get(x);
+    thingies.trimToSize(x - 1);
+    setChanged();
+    notifyObservers();
+  }
+  
   public void setSideColour(Color c)
   {
     sideColour = c;