mirror of
https://github.com/jquery/jquery-ui.git
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282 lines
8.9 KiB
JavaScript
282 lines
8.9 KiB
JavaScript
/*
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* jQuery UI Droppable
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*
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* Copyright (c) 2008 Paul Bakaus
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* Dual licensed under the MIT (MIT-LICENSE.txt)
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* and GPL (GPL-LICENSE.txt) licenses.
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*
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* http://docs.jquery.com/UI/Droppables
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*
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* Depends:
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* ui.core.js
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* ui.draggable.js
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*
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*/
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(function($) {
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$.widget("ui.droppable", {
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init: function() {
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this.element.addClass("ui-droppable");
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this.isover = 0; this.isout = 1;
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//Prepare the passed options
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var o = this.options, accept = o.accept;
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o = $.extend(o, {
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accept: o.accept && o.accept.constructor == Function ? o.accept : function(d) {
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return $(d).is(accept);
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}
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});
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//Store the droppable's proportions
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this.proportions = { width: this.element.outerWidth(), height: this.element.outerHeight() };
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// Add the reference and positions to the manager
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$.ui.ddmanager.droppables.push(this);
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},
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plugins: {},
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ui: function(c) {
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return {
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draggable: (c.currentItem || c.element),
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helper: c.helper,
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position: c.position,
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absolutePosition: c.positionAbs,
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options: this.options,
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element: this.element
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};
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},
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destroy: function() {
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var drop = $.ui.ddmanager.droppables;
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for ( var i = 0; i < drop.length; i++ )
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if ( drop[i] == this )
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drop.splice(i, 1);
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this.element
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.removeClass("ui-droppable ui-droppable-disabled")
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.removeData("droppable")
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.unbind(".droppable");
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},
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over: function(e) {
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var draggable = $.ui.ddmanager.current;
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if (!draggable || (draggable.currentItem || draggable.element)[0] == this.element[0]) return; // Bail if draggable and droppable are same element
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if (this.options.accept.call(this.element,(draggable.currentItem || draggable.element))) {
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$.ui.plugin.call(this, 'over', [e, this.ui(draggable)]);
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this.element.triggerHandler("dropover", [e, this.ui(draggable)], this.options.over);
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}
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},
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out: function(e) {
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var draggable = $.ui.ddmanager.current;
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if (!draggable || (draggable.currentItem || draggable.element)[0] == this.element[0]) return; // Bail if draggable and droppable are same element
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if (this.options.accept.call(this.element,(draggable.currentItem || draggable.element))) {
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$.ui.plugin.call(this, 'out', [e, this.ui(draggable)]);
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this.element.triggerHandler("dropout", [e, this.ui(draggable)], this.options.out);
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}
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},
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drop: function(e,custom) {
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var draggable = custom || $.ui.ddmanager.current;
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if (!draggable || (draggable.currentItem || draggable.element)[0] == this.element[0]) return false; // Bail if draggable and droppable are same element
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var childrenIntersection = false;
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this.element.find(".ui-droppable").not(".ui-draggable-dragging").each(function() {
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var inst = $.data(this, 'droppable');
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if(inst.options.greedy && $.ui.intersect(draggable, $.extend(inst, { offset: inst.element.offset() }), inst.options.tolerance)) {
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childrenIntersection = true; return false;
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}
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});
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if(childrenIntersection) return false;
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if(this.options.accept.call(this.element,(draggable.currentItem || draggable.element))) {
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$.ui.plugin.call(this, 'drop', [e, this.ui(draggable)]);
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this.element.triggerHandler("drop", [e, this.ui(draggable)], this.options.drop);
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return true;
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}
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return false;
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},
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activate: function(e) {
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var draggable = $.ui.ddmanager.current;
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$.ui.plugin.call(this, 'activate', [e, this.ui(draggable)]);
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if(draggable) this.element.triggerHandler("dropactivate", [e, this.ui(draggable)], this.options.activate);
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},
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deactivate: function(e) {
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var draggable = $.ui.ddmanager.current;
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$.ui.plugin.call(this, 'deactivate', [e, this.ui(draggable)]);
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if(draggable) this.element.triggerHandler("dropdeactivate", [e, this.ui(draggable)], this.options.deactivate);
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}
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});
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$.extend($.ui.droppable, {
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defaults: {
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disabled: false,
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tolerance: 'intersect'
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}
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});
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$.ui.intersect = function(draggable, droppable, toleranceMode) {
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if (!droppable.offset) return false;
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var x1 = (draggable.positionAbs || draggable.position.absolute).left, x2 = x1 + draggable.helperProportions.width,
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y1 = (draggable.positionAbs || draggable.position.absolute).top, y2 = y1 + draggable.helperProportions.height;
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var l = droppable.offset.left, r = l + droppable.proportions.width,
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t = droppable.offset.top, b = t + droppable.proportions.height;
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switch (toleranceMode) {
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case 'fit':
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return (l < x1 && x2 < r
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&& t < y1 && y2 < b);
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break;
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case 'intersect':
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return (l < x1 + (draggable.helperProportions.width / 2) // Right Half
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&& x2 - (draggable.helperProportions.width / 2) < r // Left Half
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&& t < y1 + (draggable.helperProportions.height / 2) // Bottom Half
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&& y2 - (draggable.helperProportions.height / 2) < b ); // Top Half
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break;
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case 'pointer':
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return (l < ((draggable.positionAbs || draggable.position.absolute).left + (draggable.clickOffset || draggable.offset.click).left) && ((draggable.positionAbs || draggable.position.absolute).left + (draggable.clickOffset || draggable.offset.click).left) < r
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&& t < ((draggable.positionAbs || draggable.position.absolute).top + (draggable.clickOffset || draggable.offset.click).top) && ((draggable.positionAbs || draggable.position.absolute).top + (draggable.clickOffset || draggable.offset.click).top) < b);
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break;
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case 'touch':
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return (
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(y1 >= t && y1 <= b) || // Top edge touching
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(y2 >= t && y2 <= b) || // Bottom edge touching
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(y1 < t && y2 > b) // Surrounded vertically
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) && (
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(x1 >= l && x1 <= r) || // Left edge touching
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(x2 >= l && x2 <= r) || // Right edge touching
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(x1 < l && x2 > r) // Surrounded horizontally
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);
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break;
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default:
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return false;
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break;
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}
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};
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/*
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This manager tracks offsets of draggables and droppables
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*/
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$.ui.ddmanager = {
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current: null,
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droppables: [],
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prepareOffsets: function(t, e) {
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var m = $.ui.ddmanager.droppables;
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var type = e ? e.type : null; // workaround for #2317
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for (var i = 0; i < m.length; i++) {
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if(m[i].options.disabled || (t && !m[i].options.accept.call(m[i].element,(t.currentItem || t.element)))) continue;
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m[i].visible = m[i].element.is(":visible"); if(!m[i].visible) continue; //If the element is not visible, continue
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m[i].offset = m[i].element.offset();
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m[i].proportions = { width: m[i].element.outerWidth(), height: m[i].element.outerHeight() };
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if(type == "dragstart" || type == "sortactivate") m[i].activate.call(m[i], e); //Activate the droppable if used directly from draggables
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}
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},
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drop: function(draggable, e) {
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var dropped = false;
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$.each($.ui.ddmanager.droppables, function() {
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if(!this.options) return;
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if (!this.options.disabled && this.visible && $.ui.intersect(draggable, this, this.options.tolerance))
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dropped = this.drop.call(this, e);
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if (!this.options.disabled && this.visible && this.options.accept.call(this.element,(draggable.currentItem || draggable.element))) {
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this.isout = 1; this.isover = 0;
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this.deactivate.call(this, e);
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}
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});
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return dropped;
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},
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drag: function(draggable, e) {
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//If you have a highly dynamic page, you might try this option. It renders positions every time you move the mouse.
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if(draggable.options.refreshPositions) $.ui.ddmanager.prepareOffsets(draggable, e);
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//Run through all droppables and check their positions based on specific tolerance options
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$.each($.ui.ddmanager.droppables, function() {
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if(this.disabled || this.greedyChild || !this.visible) return;
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var intersects = $.ui.intersect(draggable, this, this.options.tolerance);
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var c = !intersects && this.isover == 1 ? 'isout' : (intersects && this.isover == 0 ? 'isover' : null);
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if(!c) return;
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var parentInstance;
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if (this.options.greedy) {
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var parent = this.element.parents('.ui-droppable:eq(0)');
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if (parent.length) {
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parentInstance = $.data(parent[0], 'droppable');
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parentInstance.greedyChild = (c == 'isover' ? 1 : 0);
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}
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}
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// we just moved into a greedy child
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if (parentInstance && c == 'isover') {
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parentInstance['isover'] = 0;
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parentInstance['isout'] = 1;
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parentInstance.out.call(parentInstance, e);
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}
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this[c] = 1; this[c == 'isout' ? 'isover' : 'isout'] = 0;
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this[c == "isover" ? "over" : "out"].call(this, e);
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// we just moved out of a greedy child
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if (parentInstance && c == 'isout') {
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parentInstance['isout'] = 0;
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parentInstance['isover'] = 1;
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parentInstance.over.call(parentInstance, e);
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}
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});
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}
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};
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/*
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* Droppable Extensions
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*/
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$.ui.plugin.add("droppable", "activeClass", {
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activate: function(e, ui) {
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$(this).addClass(ui.options.activeClass);
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},
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deactivate: function(e, ui) {
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$(this).removeClass(ui.options.activeClass);
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},
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drop: function(e, ui) {
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$(this).removeClass(ui.options.activeClass);
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}
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});
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$.ui.plugin.add("droppable", "hoverClass", {
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over: function(e, ui) {
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$(this).addClass(ui.options.hoverClass);
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},
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out: function(e, ui) {
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$(this).removeClass(ui.options.hoverClass);
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},
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drop: function(e, ui) {
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$(this).removeClass(ui.options.hoverClass);
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}
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});
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})(jQuery);
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