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wp-content/plugins/wp-jquery-lightbox/jquery.touchwipe.1.1.1.js

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+/**
+ * jQuery Plugin to obtain touch gestures from iPhone, iPod Touch and iPad, should also work with Android mobile phones (not tested yet!)
+ * Common usage: wipe images (left and right to show the previous or next image)
+ * 
+ * @author Andreas Waltl, netCU Internetagentur (http://www.netcu.de)
+ * @version 1.1.1 (9th December 2010) - fix bug (older IE's had problems)
+ * @version 1.1 (1st September 2010) - support wipe up and wipe down
+ * @version 1.0 (15th July 2010)
+ */
+(function($) { 
+   $.fn.touchwipe = function(settings) {
+     var config = {
+    		min_move_x: 20,
+    		min_move_y: 20,
+ 			wipeLeft: function() { },
+ 			wipeRight: function() { },
+ 			wipeUp: function() { },
+ 			wipeDown: function() { },
+			preventDefaultEvents: true
+	 };
+     
+     if (settings) $.extend(config, settings);
+ 
+     this.each(function() {
+    	 var startX;
+    	 var startY;
+		 var isMoving = false;
+
+    	 function cancelTouch() {
+    		 this.removeEventListener('touchmove', onTouchMove);
+    		 startX = null;
+    		 isMoving = false;
+    	 }	
+    	 
+    	 function onTouchMove(e) {
+    		 if(config.preventDefaultEvents) {
+    			 e.preventDefault();
+    		 }
+    		 if(isMoving) {
+	    		 var x = e.touches[0].pageX;
+	    		 var y = e.touches[0].pageY;
+	    		 var dx = startX - x;
+	    		 var dy = startY - y;
+	    		 if(Math.abs(dx) >= config.min_move_x) {
+	    			cancelTouch();
+	    			if(dx > 0) {
+	    				config.wipeLeft();
+	    			}
+	    			else {
+	    				config.wipeRight();
+	    			}
+	    		 }
+	    		 else if(Math.abs(dy) >= config.min_move_y) {
+		    			cancelTouch();
+		    			if(dy > 0) {
+		    				config.wipeDown();
+		    			}
+		    			else {
+		    				config.wipeUp();
+		    			}
+		    		 }
+    		 }
+    	 }
+    	 
+    	 function onTouchStart(e)
+    	 {
+    		 if (e.touches.length == 1) {
+    			 startX = e.touches[0].pageX;
+    			 startY = e.touches[0].pageY;
+    			 isMoving = true;
+    			 this.addEventListener('touchmove', onTouchMove, false);
+    		 }
+    	 }    	 
+    	 if ('ontouchstart' in document.documentElement) {
+    		 this.addEventListener('touchstart', onTouchStart, false);
+    	 }
+     });
+ 
+     return this;
+   };
+ 
+ })(jQuery);