if(!validHandle) return false;
}
this.currentItem = currentItem;
this._removeCurrentsFromItems();
return true;
},
_mouseStart: function(event, overrideHandle, noActivation) {
var o = this.options, self = this;
this.currentContainer = this;
//We only need to call refreshPositions, because the refreshItems call has been moved to mouseCapture
this.refreshPositions();
//Create and append the visible helper
this.helper = this._createHelper(event);
//Cache the helper size
this._cacheHelperProportions();
/*
* – Position generation –
* This block generates everything position related – it’s the core of draggables.
*/
//Cache the margins of the original element
this._cacheMargins();
//Get the next scrolling parent
this.scrollParent = this.helper.scrollParent();
//The element’s absolute position on the page minus margins
this.offset = this.currentItem.offset();
this.offset = {
top: this.offset.top – this.margins.top,
left: this.offset.left – this.margins.left
};
// Only after we got the offset, we can change the helper’s position to absolute
// TODO: Still need to figure out a way to make relative sorting possible
this.helper.css(“position”, “absolute”);
this.cssPosition = this.helper.css(“position”);
$.extend(this.offset, {
click: { //Where the click happened, relative to the element
left: event.pageX – this.offset.left,
top: event.pageY – this.offset.top
},
parent: this._getParentOffset(),
relative: this._getRelativeOffset() //This is a relative to absolute position minus the actual position calculation – only used for relative positioned helper
});
//Generate the original position
this.originalPosition = this._generatePosition(event);
this.originalPageX = event.pageX;
this.originalPageY = event.pageY;
//Adjust the mouse offset relative to the helper if ‘cursorAt’ is supplied
if(o.cursorAt)
this._adjustOffsetFromHelper(o.cursorAt);
//Cache the former DOM position
this.domPosition = { prev: this.currentItem.prev()[0], parent: this.currentItem.parent()[0] };
//If the helper is not the original, hide the original so it’s not playing any role during the drag, won’t cause anything bad this way
if(this.helper[0] != this.currentItem[0]) {
this.currentItem.hide();
}
//Create the placeholder
this._createPlaceholder();
//Set a containment if given in the options
if(o.containment)
this._setContainment();
if(o.cursor) { // cursor option
if ($(‘body’).css(“cursor”)) this._storedCursor = $(‘body’).css(“cursor”);
$(‘body’).css(“cursor”, o.cursor);
}
if(o.opacity) { // opacity option
if (this.helper.css(“opacity”)) this._storedOpacity = this.helper.css(“opacity”);
