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steal("jquery/event/drop").then(function($){ //needs drop to determine if respondable
/**
* @add jQuery.Drag.prototype
*/
$.Drag.prototype.
/**
* Will scroll elements with a scroll bar as the drag moves to borders.
* @plugin jquery/event/drag/scroll
* @download http://jmvcsite.heroku.com/pluginify?plugins[]=jquery/event/drag/scroll/scroll.js
* @param {jQuery} elements to scroll. The window can be in this array.
* @param {Object} options changes the default settings.
*
* - distance {number} 30 - how many pixels away from a boundry where we start scrolling
* - delta(diff) {Function} - returns how far we should scroll. It is passed how many pixels the cursor is
* from the boundry.
* - direction {String} - direction scrolling should happen. "xy" is the default.
*/
scrolls = function(elements, options){
var elements = $(elements);
for(var i = 0 ; i < elements.length; i++){
this.constructor.responder._elements.push( elements.eq(i).data("_dropData", new $.Scrollable(elements[i], options) )[0] )
}
},
$.Scrollable = function(element, options){
this.element = jQuery(element);
this.options = $.extend({
// when we should start scrolling
distance : 30,
// how far we should move
delta : function(diff, distance){
return (distance - diff) / 2;
},
direction: "xy"
}, options);
this.x = this.options.direction.indexOf("x") != -1;
this.y = this.options.direction.indexOf("y") != -1;
}
$.extend($.Scrollable.prototype,{
init: function( element ) {
this.element = jQuery(element);
},
callHandlers: function( method, el, ev, drag ) {
this[method](el || this.element[0], ev, this, drag)
},
dropover: function() {
},
dropon: function() {
this.clear_timeout();
},
dropout: function() {
this.clear_timeout();
},
dropinit: function() {
},
dropend: function() {},
clear_timeout: function() {
if(this.interval){
clearTimeout(this.interval)
this.interval = null;
}
},
distance: function( diff ) {
return (30 - diff) / 2;
},
dropmove: function( el, ev, drop, drag ) {
//if we were about to call a move, clear it.
this.clear_timeout();
//position of the mouse
var mouse = ev.vector(),
//get the object we are going to get the boundries of
location_object = $(el == document.documentElement ? window : el),
//get the dimension and location of that object
dimensions = location_object.dimensionsv('outer'),
position = location_object.offsetv(),
//how close our mouse is to the boundries
bottom = position.y()+dimensions.y() - mouse.y(),
top = mouse.y() - position.y(),
right = position.x()+dimensions.x() - mouse.x(),
left = mouse.x() - position.x(),
//how far we should scroll
dx =0, dy =0,
distance = this.options.distance;
//check if we should scroll
if(bottom < distance && this.y)
dy = this.options.delta(bottom,distance);
else if(top < distance && this.y)
dy = -this.options.delta(top,distance)
if(right < distance && this.options && this.x)
dx = this.options.delta(right,distance);
else if(left < distance && this.x)
dx = -this.options.delta(left,distance);
//if we should scroll
if(dx || dy){
//set a timeout that will create a mousemove on that object
var self = this;
this.interval = setTimeout( function(){
self.move($(el), drag.movingElement, dx, dy, ev, ev.clientX, ev.clientY, ev.screenX, ev.screenY)
},15)
}
},
/**
* Scrolls an element then calls mouse a mousemove in the same location.
* @param {HTMLElement} scroll_element the element to be scrolled
* @param {HTMLElement} drag_element
* @param {Number} dx how far to scroll
* @param {Number} dy how far to scroll
* @param {Number} x the mouse position
* @param {Number} y the mouse position
*/
move: function( scroll_element, drag_element, dx, dy, ev/*, x,y,sx, sy*/ ) {
scroll_element.scrollTop( scroll_element.scrollTop() + dy);
scroll_element.scrollLeft(scroll_element.scrollLeft() + dx);
drag_element.trigger(
$.event.fix({type: "mousemove",
clientX: ev.clientX,
clientY: ev.clientY,
screenX: ev.screenX,
screenY: ev.screenY,
pageX: ev.pageX,
pageY: ev.pageY}))
//drag_element.synthetic('mousemove',{clientX: x, clientY: y, screenX: sx, screenY: sy})
}
})
})