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(function($) {
//Make nodes selectable by expression
$.extend($.expr[':'], { draggable: "(' '+a.className+' ').indexOf(' ui-draggable ')" });
//Macros for external methods that support chaining
var methods = "destroy,enable,disable".split(",");
for(var i=0;i<methods.length;i++) {
var cur = methods[i], f;
eval('f = function() { var a = arguments; return this.each(function() { if(jQuery(this).is(".ui-draggable")) jQuery.data(this, "ui-draggable")["'+cur+'"](a); }); }');
$.fn["draggable"+cur.substr(0,1).toUpperCase()+cur.substr(1)] = f;
};
//get instance method
$.fn.draggableInstance = function() {
if($(this[0]).is(".ui-draggable")) return $.data(this[0], "ui-draggable");
return false;
};
$.fn.draggable = function(o) {
return this.each(function() {
new $.ui.draggable(this, o);
});
}
$.ui.ddmanager = {
current: null,
droppables: [],
prepareOffsets: function(t, e) {
var dropTop = $.ui.ddmanager.dropTop = [];
var dropLeft = $.ui.ddmanager.dropLeft;
var m = $.ui.ddmanager.droppables;
for (var i = 0; i < m.length; i++) {
if(m[i].item.disabled) continue;
m[i].offset = $(m[i].item.element).offset();
if (t && m[i].item.options.accept(t.element)) //Activate the droppable if used directly from draggables
m[i].item.activate.call(m[i].item, e);
}
},
fire: function(oDrag, e) {
var oDrops = $.ui.ddmanager.droppables;
var oOvers = $.grep(oDrops, function(oDrop) {
if (!oDrop.item.disabled && $.ui.intersect(oDrag, oDrop, oDrop.item.options.tolerance))
oDrop.item.drop.call(oDrop.item, e);
});
$.each(oDrops, function(i, oDrop) {
if (!oDrop.item.disabled && oDrop.item.options.accept(oDrag.element)) {
oDrop.out = 1; oDrop.over = 0;
oDrop.item.deactivate.call(oDrop.item, e);
}
});
},
update: function(oDrag, e) {
if(oDrag.options.refreshPositions) $.ui.ddmanager.prepareOffsets();
var oDrops = $.ui.ddmanager.droppables;
var oOvers = $.grep(oDrops, function(oDrop) {
if(oDrop.item.disabled) return false;
var isOver = $.ui.intersect(oDrag, oDrop, oDrop.item.options.tolerance)
if (!isOver && oDrop.over == 1) {
oDrop.out = 1; oDrop.over = 0;
oDrop.item.out.call(oDrop.item, e);
}
return isOver;
});
$.each(oOvers, function(i, oOver) {
if (oOver.over == 0) {
oOver.out = 0; oOver.over = 1;
oOver.item.over.call(oOver.item, e);
}
});
}
};
$.ui.draggable = function(el, o) {
var options = {};
$.extend(options, o);
var self = this;
$.extend(options, {
_start: function(h, p, c, t, e) {
self.start.apply(t, [self, e]); // Trigger the start callback
},
_beforeStop: function(h, p, c, t, e) {
self.stop.apply(t, [self, e]); // Trigger the start callback
},
_drag: function(h, p, c, t, e) {
self.drag.apply(t, [self, e]); // Trigger the start callback
},
startCondition: function(e) {
return !(e.target.className.indexOf("ui-resizable-handle") != -1 || self.disabled);
}
});
$.data(el, "ui-draggable", this);
if (options.ghosting == true) options.helper = 'clone'; //legacy option check
$(el).addClass("ui-draggable");
this.interaction = new $.ui.mouseInteraction(el, options);
}
$.extend($.ui.draggable.prototype, {
plugins: {},
currentTarget: null,
lastTarget: null,
destroy: function() {
$(this.interaction.element).removeClass("ui-draggable").removeClass("ui-draggable-disabled");
this.interaction.destroy();
},
enable: function() {
$(this.interaction.element).removeClass("ui-draggable-disabled");
this.disabled = false;
},
disable: function() {
$(this.interaction.element).addClass("ui-draggable-disabled");
this.disabled = true;
},
prepareCallbackObj: function(self) {
return {
helper: self.helper,
position: { left: self.pos[0], top: self.pos[1] },
offset: self.options.cursorAt,
draggable: self,
options: self.options
}
},
start: function(that, e) {
var o = this.options;
$.ui.ddmanager.current = this;
$.ui.plugin.call(that, 'start', [e, that.prepareCallbackObj(this)]);
$(this.element).triggerHandler("dragstart", [e, that.prepareCallbackObj(this)], o.start);
if (this.slowMode && $.ui.droppable && !o.dropBehaviour)
$.ui.ddmanager.prepareOffsets(this, e);
return false;
},
stop: function(that, e) {
var o = this.options;
$.ui.plugin.call(that, 'stop', [e, that.prepareCallbackObj(this)]);
$(this.element).triggerHandler("dragstop", [e, that.prepareCallbackObj(this)], o.stop);
if (this.slowMode && $.ui.droppable && !o.dropBehaviour) //If cursorAt is within the helper, we must use our drop manager
$.ui.ddmanager.fire(this, e);
$.ui.ddmanager.current = null;
$.ui.ddmanager.last = this;
return false;
},
drag: function(that, e) {
var o = this.options;
$.ui.ddmanager.update(this, e);
this.pos = [this.pos[0]-o.cursorAt.left, this.pos[1]-o.cursorAt.top];
$.ui.plugin.call(that, 'drag', [e, that.prepareCallbackObj(this)]);
var nv = $(this.element).triggerHandler("drag", [e, that.prepareCallbackObj(this)], o.drag);
var nl = (nv && nv.left) ? nv.left : this.pos[0];
var nt = (nv && nv.top) ? nv.top : this.pos[1];
$(this.helper).css('left', nl+'px').css('top', nt+'px'); // Stick the helper to the cursor
return false;
}
});
})($);