La anulación oficial de un arrastre mientras se arrastra no está permitida en la interfaz de usuario de jQuery "por diseño" [1] - No estoy de acuerdo con la situación, pero es como es.
Si algo fiable desea cancelar un arrastre pleno vuelo, tendrá que combinar un par de cortes [2, 3]:
$(window).keydown(function(e){
if(e.keyCode == 27) {
var mouseMoveEvent = document.createEvent("MouseEvents");
var offScreen = -50000;
mouseMoveEvent.initMouseEvent(
"mousemove", //event type : click, mousedown, mouseup, mouseover, etc.
true, //canBubble
false, //cancelable
window, //event's AbstractView : should be window
1, // detail : Event's mouse click count
offScreen, // screenX
offScreen, // screenY
offScreen, // clientX
offScreen, // clientY
false, // ctrlKey
false, // altKey
false, // shiftKey
false, // metaKey
0, // button : 0 = click, 1 = middle button, 2 = right button
null // relatedTarget : Only used with some event types (e.g. mouseover and mouseout).
// In other cases, pass null.
);
// Move the mouse pointer off screen so it won't be hovering a droppable
document.dispatchEvent(mouseMoveEvent);
// This is jQuery speak for:
// for all ui-draggable elements who have an active draggable plugin, that
var dragged = $('.ui-draggable:data(draggable)')
// either are ui-draggable-dragging, or, that have a helper that is ui-draggable-dragging
.filter(function(){return $('.ui-draggable-dragging').is($(this).add(($(this).data('draggable') || {}).helper))});
// We need to restore this later
var origRevertDuration = dragged.draggable('option', 'revertDuration');
var origRevertValue = dragged.draggable('option', 'revert');
dragged
// their drag is being reverted
.draggable('option', 'revert', true)
// no revert animation
.draggable('option', 'revertDuration', 0)
// and the drag is forcefully ended
.trigger('mouseup')
// restore revert animation settings
.draggable('option', 'revertDuration', origRevertDuration)
// restore revert value
.draggable('option', 'revert', origRevertValue);
}
}
Ahora, esto no es bastante. Pero funciona. Incluso cuando se cancela al pasar un aceptador droppable.
Diviértete con ella.
[1] - http://bugs.jqueryui.com/ticket/8414
[2] - https://gist.github.com/3517765
[3] - https://forum.jquery.com/topic/how-to-cancel-drag-while-dragging
Dado que actualmente el arrastrable carece de una forma autorizada para cancelar el comando, cada respuesta será un truco que contiene varios grados de efectos secundarios no deseados. Aquí está el ticket de solicitud de función: http://bugs.jqueryui.com/ticket/8414 –