Revert "Bad sync"

This reverts commit 70a7e8090e13cc35b93e652d2bcd7f418af26fc1.

src/eventhandler.js

@@ -36,7 +36,7 @@
 
 /**
  * For use by classes which want to support custom, non-browser events.
-    * TODO: This is an awful name!  This thing represents an "event source",
+ * TODO: This is an aweful name!  This thing represents an "event source",
  *       not an "event handler".  PLEASE change the to EventSource. Also please
  *       change 'addHandler', 'removeHandler' and 'raiseEvent' to 'bind',
  *       'unbind', and 'trigger' respectively.  Finally add a method 'one' which
@@ -55,15 +55,14 @@
      * @function
      * @param {String} eventName - Name of event to register.
      * @param {Function} handler - Function to call when event is triggered.
-        * @param {Object} optional userData - Arbitrary object to be passed to the handler.
      */
-        addHandler: function (eventName, handler, userData) {
+    addHandler: function( eventName, handler ) {
         var events = this.events[ eventName ];
         if( !events ){
             this.events[ eventName ] = events = [];
         }
         if( handler && $.isFunction( handler ) ){
-                events[events.length] = { handler: handler, userData: userData || null };
+            events[ events.length ] = handler;
         }
     },
 
@@ -82,7 +81,7 @@
         }
         if( $.isArray( events ) ){
             for( i = 0; i < events.length; i++ ){
-                    if (events[i].handler !== handler) {
+                if( events[ i ] !== handler ){
                     handlers.push( events[ i ] );
                 }
             }
@@ -108,7 +107,7 @@
     },
 
     /**
-        * Retrieve the list of all handlers registered for a given event.
+     * Retrive the list of all handlers registered for a given event.
      * @function
      * @param {String} eventName - Name of event to get handlers for.
      */
@@ -125,8 +124,7 @@
                 length = events.length;
             for ( i = 0; i < length; i++ ) {
                 if( events[ i ] ){
-                        args.userData = events[i].userData;
-                        events[i].handler(source, args);
+                    events[ i ]( source, args );
                 }
             }
         };

src/legacytilesource.js

@@ -71,16 +71,8 @@
 
     //clean up the levels to make sure we support all formats
     options.levels = filterFiles( options.levels );
-
-        if (options.levels.length > 0) {
     width = options.levels[ options.levels.length - 1 ].width;
     height = options.levels[ options.levels.length - 1 ].height;
-        }
-        else {
-            width = 0;
-            height = 0;
-            $.console.error("No supported image formats found");
-        }
 
     $.extend( true,  options, {
         width:       width,
@@ -88,7 +80,7 @@
         tileSize:    Math.max( height, width ),
         tileOverlap: 0,
         minLevel:    0,
-            maxLevel: options.levels.length > 0 ? options.levels.length - 1 : 0
+        maxLevel:    options.levels.length - 1
     });
 
     $.TileSource.apply( this, [ options ] );
@@ -149,7 +141,7 @@
      */
     getLevelScale: function( level ) {
         var levelScale = NaN;
-            if (this.levels.length > 0 && level >= this.minLevel && level <= this.maxLevel) {
+        if (  level >= this.minLevel && level <= this.maxLevel ){
             levelScale =
                 this.levels[ level ].width /
                 this.levels[ this.maxLevel ].width;
@@ -196,7 +188,7 @@
      */
     getTileUrl: function( level, x, y ) {
         var url = null;
-            if (this.levels.length > 0 && level >= this.minLevel && level <= this.maxLevel) {
+        if( level >= this.minLevel && level <= this.maxLevel ){
             url = this.levels[ level ].url;
         }
         return url;
@@ -231,9 +223,6 @@
                 height: Number( file.height )
             });
         }
-            else {
-                $.console.error('Unsupported image format: %s', file.url ? file.url : '<no URL>');
-            }
     }
 
     return filtered.sort(function(a,b){

src/tilesource.js

@@ -117,8 +117,8 @@
     for( i = 0; i < arguments.length; i++ ){
         if( $.isFunction( arguments[i] ) ){
             callback = arguments[ i ];
-                this.addHandler('ready', function (placeHolderSource, placeHolderArgs) {
-                    callback(placeHolderArgs.tileSource);
+            this.addHandler( 'ready', function( placeHolderSource, readySource ){
+                callback( readySource );
             });
             //only one callback per constructor
             break;
@@ -301,7 +301,7 @@
             options = $TileSource.prototype.configure.apply( _this, [ data, url ]);
             readySource = new $TileSource( options );
             _this.ready = true;
-                _this.raiseEvent('ready', { tileSource: readySource });
+            _this.raiseEvent( 'ready', readySource );
         };
 
         if( url.match(/\.js$/) ){

src/viewer.js

@@ -1463,7 +1463,7 @@ function onCanvasDrag( tracker, position, delta, shift ) {
             this.viewport.applyConstraints();
         }
     }
-    this.raiseEvent( 'canvas-drag', {
+    this.raiseEvent( 'canvas-click', {
         tracker: tracker,
         position: position,
         delta: delta,