Created iso scene view model listener to handle modifications to the

scene view model more elegantly.  Updated editor and scene view panel
to make use of said listener.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@499 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/miso/client/IsoSceneViewModel.java

@@ -1,10 +1,11 @@
 //
-// $Id: IsoSceneViewModel.java,v 1.14 2001/10/17 22:21:22 shaper Exp $
+// $Id: IsoSceneViewModel.java,v 1.15 2001/10/18 21:01:44 shaper Exp $
 
 package com.threerings.miso.scene;
 
 import java.awt.Dimension;
 import java.awt.Point;
+import java.util.ArrayList;
 
 import com.samskivert.util.Config;
 
@@ -109,6 +110,31 @@ public class IsoSceneViewModel
 	showPaths = config.getValue(SHOW_PATHS_KEY, DEF_SHOW_PATHS);
     }
 
+    /**
+     * Add an iso scene view model listener.
+     *
+     * @param l the listener.
+     */
+    public void addListener (IsoSceneViewModelListener l)
+    {
+        if (!_listeners.contains(l)) {
+            _listeners.add(l);
+        }
+    }
+
+    /**
+     * Notify all model listeners that the iso scene view model has
+     * changed.
+     */
+    protected void notifyListeners (int event)
+    {
+	int size = _listeners.size();
+	for (int ii = 0; ii < size; ii++) {
+	    ((IsoSceneViewModelListener)_listeners.get(ii)).
+                viewChanged(event);
+	}
+    }
+
     /**
      * Returns whether the given tile coordinate is a valid coordinate
      * within the scene.
@@ -133,49 +159,21 @@ public class IsoSceneViewModel
     }
 
     /**
-     * Return whether locations in the scene are currently drawn.
+     * Toggle whether locations in the scene should be drawn.
      */
-    public boolean getShowLocations ()
+    public void toggleShowLocations ()
     {
-	return showLocs;
+	showLocs = !showLocs;
+        notifyListeners(IsoSceneViewModelListener.SHOW_LOCATIONS_CHANGED);
     }
 
     /**
-     * Set whether locations in the scene should be drawn.
-     *
-     * @param show whether to show locations.
+     * Toggle whether coordinates should be drawn for each tile.
      */
-    public void setShowLocations (boolean show)
+    public void toggleShowCoordinates ()
     {
-	showLocs = show;
-    }
-
-    /**
-     * Return whether coordinates are currently drawn for each tile.
-     */
-    public boolean getShowCoordinates ()
-    {
-	return showCoords;
-    }
-
-    /**
-     * Set whether coordinates should be drawn for each tile.
-     *
-     * @param show whether to show coordinates.
-     */
-    public void setShowCoordinates (boolean show)
-    {
-	showCoords = show;
-    }
-
-    /**
-     * Set whether sprite paths should be drawn.
-     *
-     * @param show whether to show paths.
-     */
-    public void setShowSpritePaths (boolean show)
-    {
-	showPaths = show;
+	showCoords = !showCoords;
+        notifyListeners(IsoSceneViewModelListener.SHOW_COORDINATES_CHANGED);
     }
 
     /**
@@ -297,4 +295,7 @@ public class IsoSceneViewModel
     protected static final boolean DEF_SHOW_COORDS = false;
     protected static final boolean DEF_SHOW_LOCS = false;
     protected static final boolean DEF_SHOW_PATHS = false;
+
+    /** The model listeners. */
+    protected ArrayList _listeners = new ArrayList();
 }

src/java/com/threerings/miso/client/IsoSceneViewModelListener.java

@@ -0,0 +1,23 @@
+//
+// $Id: IsoSceneViewModelListener.java,v 1.1 2001/10/18 21:01:44 shaper Exp $
+
+package com.threerings.miso.scene;
+
+/**
+ * The iso scene view model listener interface should be implemented
+ * by classes that would like to be notified when the iso scene view
+ * model is changed.
+ *
+ * @see IsoSceneViewModel
+ */
+public interface IsoSceneViewModelListener
+{
+    /**
+     * Called by the {@link IsoSceneView} when the model is changed.
+     */
+    public void viewChanged (int event);
+
+    /** Notification event constants. */
+    public static final int SHOW_LOCATIONS_CHANGED = 0;
+    public static final int SHOW_COORDINATES_CHANGED = 1;
+}

src/java/com/threerings/miso/client/SceneViewPanel.java

@@ -1,5 +1,5 @@
 //
-// $Id: SceneViewPanel.java,v 1.16 2001/10/17 22:21:22 shaper Exp $
+// $Id: SceneViewPanel.java,v 1.17 2001/10/18 21:01:44 shaper Exp $
 
 package com.threerings.miso.scene;
 
@@ -18,6 +18,7 @@ import com.threerings.miso.util.MisoUtil;
  * UI events.
  */
 public class SceneViewPanel extends AnimatedPanel
+    implements IsoSceneViewModelListener
 {
     /**
      * Constructs the scene view panel.
@@ -25,10 +26,22 @@ public class SceneViewPanel extends AnimatedPanel
     public SceneViewPanel (Config config, SpriteManager spritemgr)
     {
         // create the data model for the scene view
-        _smodel = new IsoSceneViewModel(config);
+        _scenemodel = new IsoSceneViewModel(config);
+
+        // listen to the iso scene view model to receive notice when
+        // location or coordinate display is toggled
+        _scenemodel.addListener(this);
 
 	// create the scene view
-        _view = newSceneView(spritemgr, _smodel);
+        _view = newSceneView(spritemgr, _scenemodel);
+    }
+
+    /**
+     * Gets the iso scene view model associated with this panel.
+     */
+    public IsoSceneViewModel getModel ()
+    {
+        return _scenemodel;
     }
 
     /**
@@ -75,13 +88,20 @@ public class SceneViewPanel extends AnimatedPanel
      */
     public Dimension getPreferredSize ()
     {
-        Dimension psize = (_smodel == null) ?
-            super.getPreferredSize() : _smodel.bounds;
+        Dimension psize = (_scenemodel == null) ?
+            super.getPreferredSize() : _scenemodel.bounds;
 	return psize;
     }
 
+    // documentation inherited
+    public void viewChanged (int event)
+    {
+        // update the scene view display
+        repaint();
+    }
+
     /** The scene view data model. */
-    protected IsoSceneViewModel _smodel;
+    protected IsoSceneViewModel _scenemodel;
 
     /** The scene view we're managing. */
     protected SceneView _view;