/* Copyright (c) 2008, Three Dub Media (http://threedubmedia.com)  */
(function(H){H.fn.drag=function(K,J,I){if(J){this.bind("dragstart",K)}if(I){this.bind("dragend",I)}return !K?this.trigger("drag"):this.bind("drag",J?J:K)};var D=H.event,B=D.special,F=B.drag={not:":input",distance:0,setup:function(I){I=H.extend({distance:F.distance,not:F.not},I||{});I.distance=G(I.distance);D.add(this,"mousedown",E,I)},teardown:function(){D.remove(this,"mousedown",E);if(this===F.dragging){F.dragging=F.proxy=null}C(this,true)}};function E(K){var J=this,I,L=K.data||{};if(J===document){K.dragTarget=J=L.elem;K.dragProxy=F.proxy||J;K.cursorOffsetX=L.pageX-L.left;K.cursorOffsetY=L.pageY-L.top;K.offsetX=K.pageX-K.cursorOffsetX;K.offsetY=K.pageY-K.cursorOffsetY}else{if(F.dragging||K.which!=1||H(K.target).is(L.not)){return }}switch(K.type){case"mousedown":H.extend(L,H(J).offset(),{elem:J,target:K.target,pageX:K.pageX,pageY:K.pageY});D.add(document,"mousemove mouseup",E,L);C(J,false);return false;case !F.dragging&&"mousemove":if(G(K.pageX-L.pageX)+G(K.pageY-L.pageY)<L.distance){break}K.target=L.target;I=A(K,"dragstart",J);if(I!==false){F.dragging=J;F.proxy=K.dragProxy=H(I)[0]||J}case"mousemove":if(F.dragging){I=A(K,"drag",J);if(B.drop){B.drop.allowed=(I!==false);B.drop.handler(K)}if(I!==false){break}K.type="mouseup"}case"mouseup":D.remove(document,"mousemove mouseup",E);if(F.dragging){if(B.drop){B.drop.handler(K)}A(K,"dragend",J)}C(J,true);F.dragging=F.proxy=null;break}}function A(K,I,J){K.type=I;return D.handle.call(J,K)}function G(I){return Math.pow(I,2)}function C(J,I){if(!J){return }J.unselectable=I?"off":"on";J.onselectstart=function(){return I};if(J.style){J.style.MozUserSelect=I?"":"none"}}})(jQuery);