[Resolvido] Limitar área de abrangência do Drag n' Drop

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Ainda estou estudando JS mesmo assim pegando códigos ali e codigos acolá na internet consegui montar um drag n' drop agradável até que eu possua o conhecimento necessário para fazer o meu code, 100% programado por mim .

Enquanto isso, montei um bem interessante porém estou com um ÚLTIMO problema, quero delimitar a área do drop mas não sei como fazê-lo, irei postar os códigos com os respectivos créditos.

Quero que o drop só funcione em uma div certa, porém meu script permite mover o elemento por toda página, algo que não deve ocorrer . Agradeço a ajuda de todos :)

 

dragdrop.js

 

 

/*
* jQuery UI Multidraggable 1.0
* 
* Copyright (c) 2009 Tim Radnidge (xiaohouzi79 at gmail)
*
* Dual licensed under the MIT (MIT-LICENSE.txt)
* and GPL (GPL-LICENSE.txt) licenses.
*
* This code is based largely on and extends the jQuery UI Draggable 1.7.2  Copyright (c) 2009 jQuery UI authors(http://jqueryui.com/about)
*
* Depends:
*	ui.draggable.js
*	ui.core.js
*/
(function($) {

$.widget("ui.multidraggable", $.extend({}, $.ui.draggable.prototype, {
_init: function() {

	if (this.options.helper == 'original' && !(/^(?:r|a|f)/).test(this.element.css("position")))
		this.element[0].style.position = 'relative';

	(this.options.addClasses && this.element.addClass("ui-draggable"));
	(this.options.disabled && this.element.addClass("ui-draggable-disabled"));

	this._mouseInit();

	this.options.isMain = false;

},

destroy: function() {
	if(!this.element.data('multidraggable')) return;
	this.element
		.removeData("multidraggable")
		.unbind(".draggable")
		.removeClass("ui-draggable"
			+ " ui-draggable-dragging"
			+ " ui-draggable-disabled");
	this._mouseDestroy();
},

_mouseCapture: function(event) {
	if (event.ctrlKey) {
		// Class for marking a multidraggable as being part of the group
		this.element.toggleClass('ui-multidraggable');
	}

	var o = this.options;

	if (this.helper || o.disabled || $(event.target).is('.ui-resizable-handle'))
		return false;

	//Quit if we're not on a valid handle
	this.handle = this._getHandle(event);
	if (!this.handle)
		return false;

	return true;

},

mouseStart: function(event, draggedOptions) {
	var o = this.options;

	if (this.element.hasClass('ui-multidraggable')) {
		this.options.draggedOptions = draggedOptions;
	}

	//Create and append the visible helper
	this.helper = this._createHelper(event);

	//Cache the helper size
	this._cacheHelperProportions();

	//If ddmanager is used for droppables, set the global draggable
	if($.ui.ddmanager)
		$.ui.ddmanager.current = this;

	/*
	 * - Position generation -
	 * This block generates everything position related - it's the core of draggables.
	 */

	//Cache the margins of the original element
	this._cacheMargins();

	//Store the helper's css position
	this.cssPosition = this.helper.css("position");
	this.scrollParent = this.helper.scrollParent();

	//The element's absolute position on the page minus margins
	this.offset = this.element.offset();
	this.offset = {
		top: this.offset.top - this.margins.top,
		left: this.offset.left - this.margins.left
	};

	$.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 (this.element.hasClass('ui-multidraggable') && o.isMain) {
		this._adjustOffsetFromHelper(o.cursorAt);
	} else if (o.cursorAt) {
		this._adjustOffsetFromHelper(o.cursorAt);
	}

	//Set a containment if given in the options
	if(o.containment)
		this._setContainment();

	//Call plugins and callbacks
	this._trigger("start", event);

	//Recache the helper size
	this._cacheHelperProportions();

	//Prepare the droppable offsets
	if ($.ui.ddmanager && !o.dropBehaviour)
		$.ui.ddmanager.prepareOffsets(this, event);

	this.helper.addClass("ui-draggable-dragging");
	this.mouseDrag(event, true); //Execute the drag once - this causes the helper not to be visible before getting its correct position
	return true;
},

_mouseStart: function(event) {
	var o = this.options;

	if (this.element.hasClass('ui-multidraggable')) {
		this.options.isMain = true;
		$(".ui-multidraggable").multidraggable("mouseStart", event, o);
		return true;
	} else {
		this.mouseStart(event, o);
	}
},

mouseDrag: function(event, noPropagation) {

	//Compute the helpers position
	this.position = this._generatePosition(event);
	this.positionAbs = this._convertPositionTo("absolute");

	//Call plugins and callbacks and use the resulting position if something is returned
	if (!noPropagation) {
		var ui = this._uiHash();
		this._trigger('drag', event, ui);
		this.position = ui.position;
	}

	if (this.element.hasClass('ui-multidraggable')) {
		if((!this.options.axis && !this.options.draggedOptions.axis) || (this.options.axis != "y" && this.options.draggedOptions.axis != "y")) this.helper[0].style.left = this.position.left+'px';
		if((!this.options.axis && !this.options.draggedOptions.axis) || (this.options.axis != "x" && this.options.draggedOptions.axis != "x")) this.helper[0].style.top = this.position.top+'px';
	} else {
		if(!this.options.axis || this.options.axis != "y") this.helper[0].style.left = this.position.left+'px';
		if(!this.options.axis || this.options.axis != "x") this.helper[0].style.top = this.position.top+'px';		
	}
	if($.ui.ddmanager) $.ui.ddmanager.drag(this, event);

	return false;
},

_mouseDrag: function(event, noPropagation) {
	if (this.element.hasClass('ui-multidraggable')) {
		$(".ui-multidraggable").multidraggable("mouseDrag", event, noPropagation);
		return false;
	} else {
		this.mouseDrag(event, noPropagation, this.options);
		return false;
	}
},

mouseStop: function(event) {

	//If we are using droppables, inform the manager about the drop
	var dropped = false;
	if ($.ui.ddmanager && !this.options.dropBehaviour)
		dropped = $.ui.ddmanager.drop(this, event);

	//if a drop comes from outside (a sortable)
	if(this.dropped) {
		dropped = this.dropped;
		this.dropped = false;
	}

	if((this.options.revert == "invalid" && !dropped) || (this.options.revert == "valid" && dropped) || this.options.revert === true || ($.isFunction(this.options.revert) && this.options.revert.call(this.element, dropped))) {
		var self = this;
		$(this.helper).animate(this.originalPosition, parseInt(this.options.revertDuration, 10), function() {
			self._trigger("stop", event);
			self._clear();
		});
	} else {
		this._trigger("stop", event);
		this._clear();
	}

	return false;
},	

_mouseStop: function(event) {
	if (this.element.hasClass('ui-multidraggable')) {
		$(".ui-multidraggable").multidraggable("mouseStop", event);
		return false;
	} else {
		this.mouseStop(event);
		return false;
	}
},

_clear: function() {
	this.helper.removeClass("ui-draggable-dragging");
	if(this.helper[0] != this.element[0] && !this.cancelHelperRemoval) this.helper.remove();
	//if($.ui.ddmanager) $.ui.ddmanager.current = null;
	this.options.isMain = false;
	this.helper = null;
	this.cancelHelperRemoval = false;
},

plugins: {},

}));

$.extend($.ui.multidraggable, {
version: "1.7.2",
eventPrefix: "drag",
defaults: {
	addClasses: true,
	appendTo: "parent",
	axis: false,
	cancel: ":input,option",
	connectToSortable: false,
	containment: false,
	cursor: "auto",
	cursorAt: false,
	delay: 0,
	distance: 1,
	grid: false,
	handle: false,
	helper: "original",
	iframeFix: false,
	opacity: false,
	refreshPositions: false,
	revert: false,
	revertDuration: 500,
	scope: "default",
	scroll: true,
	scrollSensitivity: 20,
	scrollSpeed: 20,
	snap: false,
	snapMode: "both",
	snapTolerance: 20,
	stack: false,
	zIndex: false
}
});

$.ui.plugin.add("multidraggable", "connectToSortable", {
start: function(event, ui) {

	var inst = $(this).data("multidraggable"), o = inst.options,
		uiSortable = $.extend({}, ui, { item: inst.element });
	inst.sortables = [];
	$(o.connectToSortable).each(function() {
		var sortable = $.data(this, 'sortable');
		if (sortable && !sortable.options.disabled) {
			inst.sortables.push({
				instance: sortable,
				shouldRevert: sortable.options.revert
			});
			sortable._refreshItems();	//Do a one-time refresh at start to refresh the containerCache
			sortable._trigger("activate", event, uiSortable);
		}
	});

},
stop: function(event, ui) {

	//If we are still over the sortable, we fake the stop event of the sortable, but also remove helper
	var inst = $(this).data("multidraggable"),
		uiSortable = $.extend({}, ui, { item: inst.element });

	$.each(inst.sortables, function() {
		if(this.instance.isOver) {

			this.instance.isOver = 0;

			inst.cancelHelperRemoval = true; //Don't remove the helper in the draggable instance
			this.instance.cancelHelperRemoval = false; //Remove it in the sortable instance (so sortable plugins like revert still work)

			//The sortable revert is supported, and we have to set a temporary dropped variable on the draggable to support revert: 'valid/invalid'
			if(this.shouldRevert) this.instance.options.revert = true;

			//Trigger the stop of the sortable
			this.instance._mouseStop(event);

			this.instance.options.helper = this.instance.options._helper;

			//If the helper has been the original item, restore properties in the sortable
			if(inst.options.helper == 'original')
				this.instance.currentItem.css({ top: 'auto', left: 'auto' });

		} else {
			this.instance.cancelHelperRemoval = false; //Remove the helper in the sortable instance
			this.instance._trigger("deactivate", event, uiSortable);
		}

	});

},
drag: function(event, ui) {

	var inst = $(this).data("multidraggable"), self = this;

	var checkPos = function(o) {
		var dyClick = this.offset.click.top, dxClick = this.offset.click.left;
		var helperTop = this.positionAbs.top, helperLeft = this.positionAbs.left;
		var itemHeight = o.height, itemWidth = o.width;
		var itemTop = o.top, itemLeft = o.left;

		return $.ui.isOver(helperTop + dyClick, helperLeft + dxClick, itemTop, itemLeft, itemHeight, itemWidth);
	};

	$.each(inst.sortables, function(i) {

		//Copy over some variables to allow calling the sortable's native _intersectsWith
		this.instance.positionAbs = inst.positionAbs;
		this.instance.helperProportions = inst.helperProportions;
		this.instance.offset.click = inst.offset.click;

		if(this.instance._intersectsWith(this.instance.containerCache)) {

			//If it intersects, we use a little isOver variable and set it once, so our move-in stuff gets fired only once
			if(!this.instance.isOver) {

				this.instance.isOver = 1;
				//Now we fake the start of dragging for the sortable instance,
				//by cloning the list group item, appending it to the sortable and using it as inst.currentItem
				//We can then fire the start event of the sortable with our passed browser event, and our own helper (so it doesn't create a new one)
				this.instance.currentItem = $(self).clone().appendTo(this.instance.element).data("sortable-item", true);
				this.instance.options._helper = this.instance.options.helper; //Store helper option to later restore it
				this.instance.options.helper = function() { return ui.helper[0]; };

				event.target = this.instance.currentItem[0];
				this.instance._mouseCapture(event, true);
				this.instance._mouseStart(event, true, true);

				//Because the browser event is way off the new appended portlet, we modify a couple of variables to reflect the changes
				this.instance.offset.click.top = inst.offset.click.top;
				this.instance.offset.click.left = inst.offset.click.left;
				this.instance.offset.parent.left -= inst.offset.parent.left - this.instance.offset.parent.left;
				this.instance.offset.parent.top -= inst.offset.parent.top - this.instance.offset.parent.top;

				inst._trigger("toSortable", event);
				inst.dropped = this.instance.element; //draggable revert needs that
				//hack so receive/update callbacks work (mostly)
				inst.currentItem = inst.element;
				this.instance.fromOutside = inst;

			}

			//Provided we did all the previous steps, we can fire the drag event of the sortable on every draggable drag, when it intersects with the sortable
			if(this.instance.currentItem) this.instance._mouseDrag(event);

		} else {

			//If it doesn't intersect with the sortable, and it intersected before,
			//we fake the drag stop of the sortable, but make sure it doesn't remove the helper by using cancelHelperRemoval
			if(this.instance.isOver) {

				this.instance.isOver = 0;
				this.instance.cancelHelperRemoval = true;

				//Prevent reverting on this forced stop
				this.instance.options.revert = false;

				// The out event needs to be triggered independently
				this.instance._trigger('out', event, this.instance._uiHash(this.instance));

				this.instance._mouseStop(event, true);
				this.instance.options.helper = this.instance.options._helper;

				//Now we remove our currentItem, the list group clone again, and the placeholder, and animate the helper back to it's original size
				this.instance.currentItem.remove();
				if(this.instance.placeholder) this.instance.placeholder.remove();

				inst._trigger("fromSortable", event);
				inst.dropped = false; //draggable revert needs that
			}

		};

	});

}
});

$.ui.plugin.add("multidraggable", "cursor", {
start: function(event, ui) {
	if ($(this).hasClass('ui-multidraggable')) {
		if ($(this).data('multidraggable').options.isMain == false) {
			return;
		}
	}
	var t = $('body'), o = $(this).data('multidraggable').options;
	if (t.css("cursor")) o._cursor = t.css("cursor");
	t.css("cursor", o.cursor);
},
stop: function(event, ui) {
	if ($(this).hasClass('ui-multidraggable')) {
		if ($(this).data('multidraggable').options.isMain == false) {
			return;
		}
	}	
	var o = $(this).data('multidraggable').options;
	if (o._cursor) $('body').css("cursor", o._cursor);
}
});

$.ui.plugin.add("multidraggable", "iframeFix", {
start: function(event, ui) {
	var o = $(this).data('multidraggable').options;
	$(o.iframeFix === true ? "iframe" : o.iframeFix).each(function() {
		$('<div class="ui-draggable-iframeFix" style="background: #fff;"></div>')
		.css({
			width: this.offsetWidth+"px", height: this.offsetHeight+"px",
			position: "absolute", opacity: "0.001", zIndex: 1000
		})
		.css($(this).offset())
		.appendTo("body");
	});
},
stop: function(event, ui) {
	$("div.ui-draggable-iframeFix").each(function() { this.parentNode.removeChild(this); }); //Remove frame helpers
}
});

$.ui.plugin.add("multidraggable", "opacity", {
start: function(event, ui) {
	var t = $(ui.helper), o = $(this).data('multidraggable').options;
	if(t.css("opacity")) o._opacity = t.css("opacity");
	t.css('opacity', o.opacity);
},
stop: function(event, ui) {
	var o = $(this).data('multidraggable').options;
	if(o._opacity) $(ui.helper).css('opacity', o._opacity);
}
});

$.ui.plugin.add("multidraggable", "scroll", {
start: function(event, ui) {
	var i = $(this).data("multidraggable");
	if(i.scrollParent[0] != document && i.scrollParent[0].tagName != 'HTML') i.overflowOffset = i.scrollParent.offset();
},
drag: function(event, ui) {

	var i = $(this).data("multidraggable"), o = i.options, scrolled = false;

	if(i.scrollParent[0] != document && i.scrollParent[0].tagName != 'HTML') {

		if(!o.axis || o.axis != 'x') {
			if((i.overflowOffset.top + i.scrollParent[0].offsetHeight) - event.pageY < o.scrollSensitivity)
				i.scrollParent[0].scrollTop = scrolled = i.scrollParent[0].scrollTop + o.scrollSpeed;
			else if(event.pageY - i.overflowOffset.top < o.scrollSensitivity)
				i.scrollParent[0].scrollTop = scrolled = i.scrollParent[0].scrollTop - o.scrollSpeed;
		}

		if(!o.axis || o.axis != 'y') {
			if((i.overflowOffset.left + i.scrollParent[0].offsetWidth) - event.pageX < o.scrollSensitivity)
				i.scrollParent[0].scrollLeft = scrolled = i.scrollParent[0].scrollLeft + o.scrollSpeed;
			else if(event.pageX - i.overflowOffset.left < o.scrollSensitivity)
				i.scrollParent[0].scrollLeft = scrolled = i.scrollParent[0].scrollLeft - o.scrollSpeed;
		}

	} else {

		if(!o.axis || o.axis != 'x') {
			if(event.pageY - $(document).scrollTop() < o.scrollSensitivity)
				scrolled = $(document).scrollTop($(document).scrollTop() - o.scrollSpeed);
			else if($(window).height() - (event.pageY - $(document).scrollTop()) < o.scrollSensitivity)
				scrolled = $(document).scrollTop($(document).scrollTop() + o.scrollSpeed);
		}

		if(!o.axis || o.axis != 'y') {
			if(event.pageX - $(document).scrollLeft() < o.scrollSensitivity)
				scrolled = $(document).scrollLeft($(document).scrollLeft() - o.scrollSpeed);
			else if($(window).width() - (event.pageX - $(document).scrollLeft()) < o.scrollSensitivity)
				scrolled = $(document).scrollLeft($(document).scrollLeft() + o.scrollSpeed);
		}

	}

	if(scrolled !== false && $.ui.ddmanager && !o.dropBehaviour)
		$.ui.ddmanager.prepareOffsets(i, event);

}
});

$.ui.plugin.add("multidraggable", "snap", {
start: function(event, ui) {

	var i = $(this).data("multidraggable"), o = i.options;
	i.snapElements = [];

	$(o.snap.constructor != String ? ( o.snap.items || ':data(draggable)' ) : o.snap).each(function() {
		var $t = $(this); var $o = $t.offset();
		if(this != i.element[0]) i.snapElements.push({
			item: this,
			width: $t.outerWidth(), height: $t.outerHeight(),
			top: $o.top, left: $o.left
		});
	});

},
drag: function(event, ui) {

	var inst = $(this).data("multidraggable"), o = inst.options;
	var d = o.snapTolerance;

	var x1 = ui.offset.left, x2 = x1 + inst.helperProportions.width,
		y1 = ui.offset.top, y2 = y1 + inst.helperProportions.height;

	for (var i = inst.snapElements.length - 1; i >= 0; i--){

		var l = inst.snapElements[i].left, r = l + inst.snapElements[i].width,
			t = inst.snapElements[i].top, b = t + inst.snapElements[i].height;

		//Yes, I know, this is insane ;)
		if(!((l-d < x1 && x1 < r+d && t-d < y1 && y1 < b+d) || (l-d < x1 && x1 < r+d && t-d < y2 && y2 < b+d) || (l-d < x2 && x2 < r+d && t-d < y1 && y1 < b+d) || (l-d < x2 && x2 < r+d && t-d < y2 && y2 < b+d))) {
			if(inst.snapElements[i].snapping) (inst.options.snap.release && inst.options.snap.release.call(inst.element, event, $.extend(inst._uiHash(), { snapItem: inst.snapElements[i].item })));
			inst.snapElements[i].snapping = false;
			continue;
		}

		if(o.snapMode != 'inner') {
			var ts = Math.abs(t - y2) <= d;
			var bs = Math.abs(b - y1) <= d;
			var ls = Math.abs(l - x2) <= d;
			var rs = Math.abs(r - x1) <= d;
			if(ts) ui.position.top = inst._convertPositionTo("relative", { top: t - inst.helperProportions.height, left: 0 }).top - inst.margins.top;
			if(bs) ui.position.top = inst._convertPositionTo("relative", { top: b, left: 0 }).top - inst.margins.top;
			if(ls) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: l - inst.helperProportions.width }).left - inst.margins.left;
			if(rs) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: r }).left - inst.margins.left;
		}

		var first = (ts || bs || ls || rs);

		if(o.snapMode != 'outer') {
			var ts = Math.abs(t - y1) <= d;
			var bs = Math.abs(b - y2) <= d;
			var ls = Math.abs(l - x1) <= d;
			var rs = Math.abs(r - x2) <= d;
			if(ts) ui.position.top = inst._convertPositionTo("relative", { top: t, left: 0 }).top - inst.margins.top;
			if(bs) ui.position.top = inst._convertPositionTo("relative", { top: b - inst.helperProportions.height, left: 0 }).top - inst.margins.top;
			if(ls) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: l }).left - inst.margins.left;
			if(rs) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: r - inst.helperProportions.width }).left - inst.margins.left;
		}

		if(!inst.snapElements[i].snapping && (ts || bs || ls || rs || first))
			(inst.options.snap.snap && inst.options.snap.snap.call(inst.element, event, $.extend(inst._uiHash(), { snapItem: inst.snapElements[i].item })));
		inst.snapElements[i].snapping = (ts || bs || ls || rs || first);

	};

}
});

$.ui.plugin.add("multidraggable", "stack", {
start: function(event, ui) {

	var o = $(this).data("multidraggable").options;

	var group = $.makeArray($(o.stack.group)).sort(function(a,B) {
		return (parseInt($(a).css("zIndex"),10) || o.stack.min) - (parseInt($(B).css("zIndex"),10) || o.stack.min);
	});

	$(group).each(function(i) {
		this.style.zIndex = o.stack.min + i;
	});

	if ($(this).hasClass('ui-multidraggable')) {
		if ($(this).data('multidraggable').options.isMain == true) {
			this[0].style.zIndex = o.stack.min + group.length;
		}
	} else {		
		this[0].style.zIndex = o.stack.min + group.length;
	}

}
});

$.ui.plugin.add("multidraggable", "zIndex", {
start: function(event, ui) {
	var t = $(ui.helper), o = $(this).data("multidraggable").options;
	if(t.css("zIndex")) o._zIndex = t.css("zIndex");
	t.css('zIndex', o.zIndex);
},
stop: function(event, ui) {
	var o = $(this).data("multidraggable").options;
	if(o._zIndex) $(ui.helper).css('zIndex', o._zIndex);
}
});

})(jQuery);

 

 

Há mais arquivos JS, como um jquery-UI e outro somente jquery, ambos criptografados então não devem fazer muita diferença no efeito . Qualquer problema postem que eu venho postar o script .

[William Bruno 1501]

se não me engano você consegue configurar isso na hora de instanciar o plugin:

http://jqueryui.com/demos/draggable/#option-containment

 

veja a opção: containment

Constrains dragging to within the bounds of the specified element or region. Possible string values: 'parent', 'document', 'window', [x1, y1, x2, y2].

 

Code examples

 

Initialize a draggable with the containment option specified.

$( ".selector" ).draggable({ containment: 'parent' });

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William, desculpe minha ignorância mas não sei onde e como fazer isto ? Vou ler mais sobre o evento .draggable .

Procurei pela internet algum artigo, tutorial em PT de como utilizar este evento e não encontrei nada.

 

não consegui editar o post acima, vim acrescentar que consegui fazer o script lendo um tutorial em inglês. Peço que ainda não fechem o tópico pois estou fazendo alguns testes de bug .