diff --git a/src/iipmooviewer-2.0.js b/src/iipmooviewer-2.0.js
index 6a566e3..7d22888 100644
--- a/src/iipmooviewer-2.0.js
+++ b/src/iipmooviewer-2.0.js
@@ -169,6 +169,9 @@ var IIPMooViewer = new Class({
 
     // Set up our protocol handler
     switch( options.protocol ){
+      case 'openslide_deepzoom':
+        this.protocol = new Protocols.OpenSlide_DeepZoom();
+        break;
       case 'zoomify':
 	this.protocol = new Protocols.Zoomify();
 	break;
@@ -486,28 +489,34 @@ var IIPMooViewer = new Class({
       this.nudge(-d,0);
       if( IIPMooViewer.sync ) IIPMooViewer.windows(this).invoke( 'nudge', -d, 0 );
       event.preventDefault(); // Prevent default only for navigational keys
+      this.fireEvent('viewUpdated');
       break;
     case 38: // up
       this.nudge(0,-d);
       if( IIPMooViewer.sync ) IIPMooViewer.windows(this).invoke( 'nudge', 0, -d );
       event.preventDefault();
+      this.fireEvent('viewUpdated');
       break;
     case 39: // right
       this.nudge(d,0);
       if( IIPMooViewer.sync ) IIPMooViewer.windows(this).invoke( 'nudge', d, 0 );
       event.preventDefault();
+      this.fireEvent('viewUpdated');
       break;
     case 40: // down
       this.nudge(0,d);
       if( IIPMooViewer.sync ) IIPMooViewer.windows(this).invoke( 'nudge', 0, d );
       event.preventDefault();
+      this.fireEvent('viewUpdated');
       break;
     case 107: // plus
       if(!e.control){
 	this.zoomIn();
 	if( IIPMooViewer.sync ) IIPMooViewer.windows(this).invoke('zoomIn');
 	event.preventDefault();
+	this.fireEvent('viewUpdated');
       }
+      this.fireEvent('viewUpdated');
       break;
     case 109: // minus
     case 189: // minus
@@ -515,7 +524,9 @@ var IIPMooViewer = new Class({
 	this.zoomOut();
 	if( IIPMooViewer.sync ) IIPMooViewer.windows(this).invoke('zoomOut');
 	event.preventDefault();
+	this.fireEvent('viewUpdated');
       }
+      this.fireEvent('viewUpdated');
       break;
     case 72: // h
       if( this.navOptions&&this.navOptions.id ) break;
@@ -673,6 +684,8 @@ var IIPMooViewer = new Class({
     }
 
     if(IIPMooViewer.sync) IIPMooViewer.windows(this).invoke( 'moveTo', xmove, ymove );
+    this.fireEvent('viewUpdated');
+
 
   },
 
@@ -712,6 +725,7 @@ var IIPMooViewer = new Class({
     this.moveTo( xmove, ymove );
 
     if( IIPMooViewer.sync ) IIPMooViewer.windows(this).invoke( 'moveTo', xmove, ymove );
+    this.fireEvent('viewUpdated');
 
   },
 
@@ -887,6 +901,8 @@ var IIPMooViewer = new Class({
       else IIPMooViewer.windows(this).invoke('zoomIn');
     }
 
+    this.fireEvent('viewUpdated');
+
   },
 
 
@@ -1254,14 +1270,17 @@ var IIPMooViewer = new Class({
 	'zoomIn': function(){
 	  _this.zoomIn();
 	  if( IIPMooViewer.sync ) IIPMooViewer.windows(_this).invoke( 'zoomIn' );
+	  _this.fireEvent('viewUpdated');
 	},
 	'zoomOut': function(){
 	  _this.zoomOut();
 	  if( IIPMooViewer.sync ) IIPMooViewer.windows(_this).invoke( 'zoomOut' );
+	  _this.fireEvent('viewUpdated');
 	},
 	'reload': function(){
 	  _this.reload();
 	  if( IIPMooViewer.sync ) IIPMooViewer.windows(_this).invoke( 'reload' );
+	  _this.fireEvent('viewUpdated');
 	},
 	'scroll': this.scrollNavigation.bind(this),
 	'zoom': this.zoom.bind(this)
@@ -1465,6 +1484,7 @@ var IIPMooViewer = new Class({
     if( this.scale ){
       this.scale.update( this.wid/this.max_size.w, this.view.w );
       this.scale.reflow(this.container);
+      this.fireEvent('viewUpdated');
     }
 
     // Update images
diff --git a/src/protocols/openslide_deepzoom.js b/src/protocols/openslide_deepzoom.js
new file mode 100644
index 0000000..7791c31
--- /dev/null
+++ b/src/protocols/openslide_deepzoom.js
@@ -0,0 +1,52 @@
+/* DeepZoom Protocol Handler
+ */
+
+Protocols.OpenSlide_DeepZoom = new Class({
+
+  /* Return metadata URL
+   */
+  getMetaDataURL: function(server,image){
+    return server + image;
+  },
+
+  /* Return an individual tile request URL
+   */
+  getTileURL: function(t){
+    // Strip off the .dzi or .xml suffix from the image name
+    var prefix = t.image.substr(0,t.image.lastIndexOf("."));
+    return t.server+prefix+'_files/'+(t.resolution+1)+'/'+t.x+'_'+t.y+this.suffix;
+  },
+
+  /* Parse a Deepzoom protocol metadata request
+   */
+  parseMetaData: function(response){
+    this.suffix = "." + ( /Format="(\w+)/.exec(response)[1] ); 
+    var ts = parseInt( /TileSize="(\d+)/.exec(response)[1] );
+    var w = parseInt( /Width="(\d+)/.exec(response)[1] );
+    var h = parseInt( /Height="(\d+)/.exec(response)[1] );
+    // Number of resolutions is the ceiling of Log2(max)
+    var max = (w>h)? w : h;
+    var result = {
+      'max_size': { w: w, h: h },
+      'tileSize': { w: ts, h: ts },
+      'num_resolutions': Math.ceil( Math.log(max)/Math.LN2 )
+    };
+    return result;
+  },
+
+  /* Return URL for a full view - not possible with Deepzoom
+   */
+  getRegionURL: function(server,image,region,w){
+    return null;
+  },
+
+  /* Return thumbnail URL
+   */
+  getThumbnailURL: function(server,image,width){
+    // Strip off the .dzi or .xml suffix from the image name
+    var prefix = image.substr(0,image.lastIndexOf("."));
+    // this assumes a url for the image which ends in .thumb which returns the thumbnail image
+    return server+prefix+'.thumb';
+  }
+
+});
diff --git a/src/touch.js b/src/touch.js
index 70cbb23..4869db6 100644
--- a/src/touch.js
+++ b/src/touch.js
@@ -53,6 +53,7 @@ IIPMooViewer.implement({
 	      _this.canvas.eliminate('taptime');
 	      _this.zoomIn();
 	      if(IIPMooViewer.sync) IIPMooViewer.windows(_this).invoke('zoomIn');
+	      _this.fireEvent('viewUpdated');
 	    }
 	    else{
 	      // Record our start position
@@ -128,10 +129,12 @@ IIPMooViewer.implement({
 	      if( scale > 0 ){
 		_this.zoomIn();
 		if(IIPMooViewer.sync) IIPMooViewer.windows(_this).invoke('zoomIn');
+		_this.fireEvent('viewUpdated');
 	      }
 	      else if( scale < 0 ){
 		_this.zoomOut();
 		if(IIPMooViewer.sync) IIPMooViewer.windows(_this).invoke('zoomOut');
+		_this.fireEvent('viewUpdated');
 	      }
 	    }
 
@@ -146,6 +149,7 @@ IIPMooViewer.implement({
 		else r -= 90 % 360;
 		_this.rotate(r);
 		if(IIPMooViewer.sync) IIPMooViewer.windows(_this).invoke( 'rotate', r );
+		_this.fireEvent('viewUpdated');
 	      }
 	    }
 
@@ -179,6 +183,7 @@ IIPMooViewer.implement({
 	    _this.requestImages();
 	    if( _this.navigation ) _this.navigation.update(_this.view.x/_this.wid,_this.view.y/_this.hei,_this.view.w/_this.wid,_this.view.h/_this.hei);
 	    if(IIPMooViewer.sync) IIPMooViewer.windows(_this).invoke( 'moveTo', _this.view.x, _this.view.y );
+	    _this.fireEvent('viewUpdated');
 
 	    // This activates hardware acceleration
 	    _this.canvas.setStyle( _this.CSSprefix+'transform', 'translateZ(0)' );