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527 lines
23 KiB
JavaScript
527 lines
23 KiB
JavaScript
/*
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* jQuery UI Draggable
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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/Draggables
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*
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* Depends:
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* ui.core.js
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*
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* Revision: $Id: ui.draggable.js 5618 2008-05-16 16:28:05Z scott.gonzalez $
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*/
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;(function($) {
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$.widget("ui.draggable", {
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init: function() {
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//Initialize needed constants
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var o = this.options;
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//Initialize mouse events for interaction
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this.element.mouse({
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executor: this,
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delay: o.delay,
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distance: o.distance,
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dragPrevention: o.cancel,
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start: this.start,
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stop: this.stop,
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drag: this.drag,
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condition: function(e) {
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var handle = !this.options.handle || !$(this.options.handle, this.element).length ? true : false;
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if(!handle) $(this.options.handle, this.element).each(function() { if(this == e.target) handle = true; });
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return !(e.target.className.indexOf("ui-resizable-handle") != -1 || this.options.disabled) && handle;
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}
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});
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//Position the node
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if(o.helper == 'original' && !(/(relative|absolute|fixed)/).test(this.element.css('position')))
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this.element.css('position', 'relative');
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},
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start: function(e) {
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var o = this.options;
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if($.ui.ddmanager) $.ui.ddmanager.current = this;
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//Create and append the visible helper
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this.helper = $.isFunction(o.helper) ? $(o.helper.apply(this.element[0], [e])) : (o.helper == 'clone' ? this.element.clone() : this.element);
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if(!this.helper.parents('body').length) this.helper.appendTo((o.appendTo == 'parent' ? this.element[0].parentNode : o.appendTo));
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if(this.helper[0] != this.element[0] && !(/(fixed|absolute)/).test(this.helper.css("position"))) this.helper.css("position", "absolute");
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/*
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* - Position generation -
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* This block generates everything position related - it's the core of draggables.
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*/
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this.margins = { //Cache the margins
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left: (parseInt(this.element.css("marginLeft"),10) || 0),
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top: (parseInt(this.element.css("marginTop"),10) || 0)
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};
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this.cssPosition = this.helper.css("position"); //Store the helper's css position
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this.offset = this.element.offset(); //The element's absolute position on the page
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this.offset = { //Substract the margins from the element's absolute offset
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top: this.offset.top - this.margins.top,
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left: this.offset.left - this.margins.left
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};
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this.offset.click = { //Where the click happened, relative to the element
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left: e.pageX - this.offset.left,
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top: e.pageY - this.offset.top
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};
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this.offsetParent = this.helper.offsetParent(); var po = this.offsetParent.offset(); //Get the offsetParent and cache its position
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this.offset.parent = { //Store its position plus border
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top: po.top + (parseInt(this.offsetParent.css("borderTopWidth"),10) || 0),
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left: po.left + (parseInt(this.offsetParent.css("borderLeftWidth"),10) || 0)
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};
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var p = this.element.position(); //This is a relative to absolute position minus the actual position calculation - only used for relative positioned helpers
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this.offset.relative = this.cssPosition == "relative" ? {
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top: p.top - (parseInt(this.helper.css("top"),10) || 0) + this.offsetParent[0].scrollTop,
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left: p.left - (parseInt(this.helper.css("left"),10) || 0) + this.offsetParent[0].scrollLeft
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} : { top: 0, left: 0 };
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this.originalPosition = this.generatePosition(e); //Generate the original position
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this.helperProportions = { width: this.helper.outerWidth(), height: this.helper.outerHeight() };//Cache the helper size
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if(o.cursorAt) {
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if(o.cursorAt.left != undefined) this.offset.click.left = o.cursorAt.left;
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if(o.cursorAt.right != undefined) this.offset.click.left = this.helperProportions.width - o.cursorAt.right;
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if(o.cursorAt.top != undefined) this.offset.click.top = o.cursorAt.top;
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if(o.cursorAt.bottom != undefined) this.offset.click.top = this.helperProportions.height - o.cursorAt.bottom;
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}
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/*
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* - Position constraining -
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* Here we prepare position constraining like grid and containment.
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*/
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if(o.containment) {
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if(o.containment == 'parent') o.containment = this.helper[0].parentNode;
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if(o.containment == 'document') this.containment = [0,0,$(document).width(), ($(document).height() || document.body.parentNode.scrollHeight)];
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if(!(/^(document|window|parent)$/).test(o.containment)) {
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var ce = $(o.containment)[0];
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var co = $(o.containment).offset();
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this.containment = [
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co.left + (parseInt($(ce).css("borderLeftWidth"),10) || 0) - this.offset.relative.left - this.offset.parent.left,
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co.top + (parseInt($(ce).css("borderTopWidth"),10) || 0) - this.offset.relative.top - this.offset.parent.top,
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co.left+Math.max(ce.scrollWidth,ce.offsetWidth) - (parseInt($(ce).css("borderLeftWidth"),10) || 0) - this.offset.relative.left - this.offset.parent.left - this.helperProportions.width - this.margins.left - (parseInt(this.element.css("marginRight"),10) || 0),
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co.top+Math.max(ce.scrollHeight,ce.offsetHeight) - (parseInt($(ce).css("borderTopWidth"),10) || 0) - this.offset.relative.top - this.offset.parent.top - this.helperProportions.height - this.margins.top - (parseInt(this.element.css("marginBottom"),10) || 0)
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];
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}
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}
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//Call plugins and callbacks
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this.propagate("start", e);
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this.helperProportions = { width: this.helper.outerWidth(), height: this.helper.outerHeight() };//Recache the helper size
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if ($.ui.ddmanager && !o.dropBehaviour) $.ui.ddmanager.prepareOffsets(this, e);
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return false;
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},
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convertPositionTo: function(d, pos) {
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if(!pos) pos = this.position;
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var mod = d == "absolute" ? 1 : -1;
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return {
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top: (
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pos.top // the calculated relative position
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+ this.offset.relative.top * mod // Only for relative positioned nodes: Relative offset from element to offset parent
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+ this.offset.parent.top * mod // The offsetParent's offset without borders (offset + border)
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- (this.cssPosition == "fixed" ? 0 : this.offsetParent[0].scrollTop) * mod // The offsetParent's scroll position, not if the element is fixed
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+ this.margins.top * mod //Add the margin (you don't want the margin counting in intersection methods)
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),
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left: (
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pos.left // the calculated relative position
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+ this.offset.relative.left * mod // Only for relative positioned nodes: Relative offset from element to offset parent
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+ this.offset.parent.left * mod // The offsetParent's offset without borders (offset + border)
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- (this.cssPosition == "fixed" ? 0 : this.offsetParent[0].scrollLeft) * mod // The offsetParent's scroll position, not if the element is fixed
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+ this.margins.left * mod //Add the margin (you don't want the margin counting in intersection methods)
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)
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};
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},
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generatePosition: function(e) {
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var o = this.options;
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var position = {
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top: (
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e.pageY // The absolute mouse position
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- this.offset.click.top // Click offset (relative to the element)
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- this.offset.relative.top // Only for relative positioned nodes: Relative offset from element to offset parent
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- this.offset.parent.top // The offsetParent's offset without borders (offset + border)
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+ (this.cssPosition == "fixed" ? 0 : this.offsetParent[0].scrollTop) // The offsetParent's scroll position, not if the element is fixed
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),
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left: (
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e.pageX // The absolute mouse position
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- this.offset.click.left // Click offset (relative to the element)
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- this.offset.relative.left // Only for relative positioned nodes: Relative offset from element to offset parent
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- this.offset.parent.left // The offsetParent's offset without borders (offset + border)
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+ (this.cssPosition == "fixed" ? 0 : this.offsetParent[0].scrollLeft) // The offsetParent's scroll position, not if the element is fixed
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)
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};
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if(!this.originalPosition) return position; //If we are not dragging yet, we won't check for options
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/*
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* - Position constraining -
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* Constrain the position to a mix of grid, containment.
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*/
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if(this.containment) {
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if(position.left < this.containment[0]) position.left = this.containment[0];
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if(position.top < this.containment[1]) position.top = this.containment[1];
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if(position.left > this.containment[2]) position.left = this.containment[2];
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if(position.top > this.containment[3]) position.top = this.containment[3];
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}
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if(o.grid) {
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var top = this.originalPosition.top + Math.round((position.top - this.originalPosition.top) / o.grid[1]) * o.grid[1];
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position.top = this.containment ? (!(top < this.containment[1] || top > this.containment[3]) ? top : (!(top < this.containment[1]) ? top - o.grid[1] : top + o.grid[1])) : top;
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var left = this.originalPosition.left + Math.round((position.left - this.originalPosition.left) / o.grid[0]) * o.grid[0];
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position.left = this.containment ? (!(left < this.containment[0] || left > this.containment[2]) ? left : (!(left < this.containment[0]) ? left - o.grid[0] : left + o.grid[0])) : left;
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}
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return position;
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},
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drag: function(e) {
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//Compute the helpers position
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this.position = this.generatePosition(e);
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this.positionAbs = this.convertPositionTo("absolute");
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//Call plugins and callbacks and use the resulting position if something is returned
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this.position = this.propagate("drag", e) || this.position;
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if(!this.options.axis || this.options.axis == "x") this.helper[0].style.left = this.position.left+'px';
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if(!this.options.axis || this.options.axis == "y") this.helper[0].style.top = this.position.top+'px';
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if($.ui.ddmanager) $.ui.ddmanager.drag(this, e);
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return false;
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},
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stop: function(e) {
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//If we are using droppables, inform the manager about the drop
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if ($.ui.ddmanager && !this.options.dropBehaviour)
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$.ui.ddmanager.drop(this, e);
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if(this.options.revert) {
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var self = this;
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$(this.helper).animate(this.originalPosition, parseInt(this.options.revert, 10) || 500, function() {
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self.propagate("stop", e);
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self.clear();
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});
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} else {
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this.propagate("stop", e);
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this.clear();
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}
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return false;
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},
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clear: function() {
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if(this.options.helper != 'original' && !this.cancelHelperRemoval) this.helper.remove();
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if($.ui.ddmanager) $.ui.ddmanager.current = null;
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this.helper = null;
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this.cancelHelperRemoval = false;
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},
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// From now on bulk stuff - mainly helpers
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plugins: {},
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ui: function(e) {
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return {
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helper: this.helper,
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position: this.position,
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absolutePosition: this.positionAbs,
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options: this.options
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};
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},
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propagate: function(n,e) {
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$.ui.plugin.call(this, n, [e, this.ui()]);
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return this.element.triggerHandler(n == "drag" ? n : "drag"+n, [e, this.ui()], this.options[n]);
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},
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destroy: function() {
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if(!this.element.data('draggable')) return;
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this.element.removeData("draggable").unbind(".draggable").mouse("destroy");
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}
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});
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$.ui.draggable.defaults = {
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helper: "original",
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appendTo: "parent",
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cancel: ['input','textarea','button','select','option'],
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distance: 1,
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delay: 0
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};
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$.ui.plugin.add("draggable", "cursor", {
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start: function(e, ui) {
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var t = $('body');
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if (t.css("cursor")) ui.options._cursor = t.css("cursor");
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t.css("cursor", ui.options.cursor);
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},
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stop: function(e, ui) {
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if (ui.options._cursor) $('body').css("cursor", ui.options._cursor);
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}
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});
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$.ui.plugin.add("draggable", "zIndex", {
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start: function(e, ui) {
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var t = $(ui.helper);
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if(t.css("zIndex")) ui.options._zIndex = t.css("zIndex");
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t.css('zIndex', ui.options.zIndex);
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},
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stop: function(e, ui) {
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if(ui.options._zIndex) $(ui.helper).css('zIndex', ui.options._zIndex);
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}
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});
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$.ui.plugin.add("draggable", "opacity", {
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start: function(e, ui) {
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var t = $(ui.helper);
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if(t.css("opacity")) ui.options._opacity = t.css("opacity");
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t.css('opacity', ui.options.opacity);
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},
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stop: function(e, ui) {
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if(ui.options._opacity) $(ui.helper).css('opacity', ui.options._opacity);
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}
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});
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$.ui.plugin.add("draggable", "iframeFix", {
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start: function(e, ui) {
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$(ui.options.iframeFix === true ? "iframe" : ui.options.iframeFix).each(function() {
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$('<div class="ui-draggable-iframeFix" style="background: #fff;"></div>')
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.css({
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width: this.offsetWidth+"px", height: this.offsetHeight+"px",
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position: "absolute", opacity: "0.001", zIndex: 1000
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})
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.css($(this).offset())
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.appendTo("body");
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});
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},
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stop: function(e, ui) {
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$("div.DragDropIframeFix").each(function() { this.parentNode.removeChild(this); }); //Remove frame helpers
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}
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});
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$.ui.plugin.add("draggable", "scroll", {
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start: function(e, ui) {
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var o = ui.options;
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var i = $(this).data("draggable");
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o.scrollSensitivity = o.scrollSensitivity || 20;
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o.scrollSpeed = o.scrollSpeed || 20;
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i.overflowY = function(el) {
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do { if(/auto|scroll/.test(el.css('overflow')) || (/auto|scroll/).test(el.css('overflow-y'))) return el; el = el.parent(); } while (el[0].parentNode);
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return $(document);
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}(this);
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i.overflowX = function(el) {
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do { if(/auto|scroll/.test(el.css('overflow')) || (/auto|scroll/).test(el.css('overflow-x'))) return el; el = el.parent(); } while (el[0].parentNode);
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return $(document);
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}(this);
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if(i.overflowY[0] != document && i.overflowY[0].tagName != 'HTML') i.overflowYOffset = i.overflowY.offset();
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if(i.overflowX[0] != document && i.overflowX[0].tagName != 'HTML') i.overflowXOffset = i.overflowX.offset();
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},
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drag: function(e, ui) {
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var o = ui.options;
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var i = $(this).data("draggable");
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if(i.overflowY[0] != document && i.overflowY[0].tagName != 'HTML') {
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if((i.overflowYOffset.top + i.overflowY[0].offsetHeight) - e.pageY < o.scrollSensitivity)
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i.overflowY[0].scrollTop = i.overflowY[0].scrollTop + o.scrollSpeed;
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if(e.pageY - i.overflowYOffset.top < o.scrollSensitivity)
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i.overflowY[0].scrollTop = i.overflowY[0].scrollTop - o.scrollSpeed;
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} else {
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if(e.pageY - $(document).scrollTop() < o.scrollSensitivity)
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$(document).scrollTop($(document).scrollTop() - o.scrollSpeed);
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if($(window).height() - (e.pageY - $(document).scrollTop()) < o.scrollSensitivity)
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$(document).scrollTop($(document).scrollTop() + o.scrollSpeed);
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}
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if(i.overflowX[0] != document && i.overflowX[0].tagName != 'HTML') {
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if((i.overflowXOffset.left + i.overflowX[0].offsetWidth) - e.pageX < o.scrollSensitivity)
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i.overflowX[0].scrollLeft = i.overflowX[0].scrollLeft + o.scrollSpeed;
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if(e.pageX - i.overflowXOffset.left < o.scrollSensitivity)
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i.overflowX[0].scrollLeft = i.overflowX[0].scrollLeft - o.scrollSpeed;
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} else {
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if(e.pageX - $(document).scrollLeft() < o.scrollSensitivity)
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$(document).scrollLeft($(document).scrollLeft() - o.scrollSpeed);
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if($(window).width() - (e.pageX - $(document).scrollLeft()) < o.scrollSensitivity)
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$(document).scrollLeft($(document).scrollLeft() + o.scrollSpeed);
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}
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}
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});
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$.ui.plugin.add("draggable", "snap", {
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start: function(e, ui) {
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var inst = $(this).data("draggable");
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inst.snapElements = [];
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$(ui.options.snap === true ? '.ui-draggable' : ui.options.snap).each(function() {
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var $t = $(this); var $o = $t.offset();
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if(this != inst.element[0]) inst.snapElements.push({
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item: this,
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width: $t.outerWidth(), height: $t.outerHeight(),
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top: $o.top, left: $o.left
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});
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});
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},
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drag: function(e, ui) {
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var inst = $(this).data("draggable");
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var d = ui.options.snapTolerance || 20;
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var x1 = ui.absolutePosition.left, x2 = x1 + inst.helperProportions.width,
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y1 = ui.absolutePosition.top, y2 = y1 + inst.helperProportions.height;
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for (var i = inst.snapElements.length - 1; i >= 0; i--){
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var l = inst.snapElements[i].left, r = l + inst.snapElements[i].width,
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t = inst.snapElements[i].top, b = t + inst.snapElements[i].height;
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//Yes, I know, this is insane ;)
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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))) continue;
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if(ui.options.snapMode != 'inner') {
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var ts = Math.abs(t - y2) <= 20;
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var bs = Math.abs(b - y1) <= 20;
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var ls = Math.abs(l - x2) <= 20;
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var rs = Math.abs(r - x1) <= 20;
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if(ts) ui.position.top = inst.convertPositionTo("relative", { top: t - inst.helperProportions.height, left: 0 }).top;
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if(bs) ui.position.top = inst.convertPositionTo("relative", { top: b, left: 0 }).top;
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if(ls) ui.position.left = inst.convertPositionTo("relative", { top: 0, left: l - inst.helperProportions.width }).left;
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if(rs) ui.position.left = inst.convertPositionTo("relative", { top: 0, left: r }).left;
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}
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if(ui.options.snapMode != 'outer') {
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var ts = Math.abs(t - y1) <= 20;
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|
var bs = Math.abs(b - y2) <= 20;
|
|
var ls = Math.abs(l - x1) <= 20;
|
|
var rs = Math.abs(r - x2) <= 20;
|
|
if(ts) ui.position.top = inst.convertPositionTo("relative", { top: t, left: 0 }).top;
|
|
if(bs) ui.position.top = inst.convertPositionTo("relative", { top: b - inst.helperProportions.height, left: 0 }).top;
|
|
if(ls) ui.position.left = inst.convertPositionTo("relative", { top: 0, left: l }).left;
|
|
if(rs) ui.position.left = inst.convertPositionTo("relative", { top: 0, left: r - inst.helperProportions.width }).left;
|
|
}
|
|
|
|
};
|
|
}
|
|
});
|
|
|
|
$.ui.plugin.add("draggable", "connectToSortable", {
|
|
start: function(e,ui) {
|
|
var inst = $(this).data("draggable");
|
|
inst.sortable = $.data($(ui.options.connectToSortable)[0], 'sortable');
|
|
inst.sortableOffset = inst.sortable.element.offset();
|
|
inst.sortableOuterWidth = inst.sortable.element.outerWidth();
|
|
inst.sortableOuterHeight = inst.sortable.element.outerHeight();
|
|
if(inst.sortable.options.revert) inst.sortable.shouldRevert = true;
|
|
},
|
|
stop: function(e,ui) {
|
|
//If we are still over the sortable, we fake the stop event of the sortable, but also remove helper
|
|
var instDraggable = $(this).data("draggable");
|
|
var inst = instDraggable.sortable;
|
|
|
|
if(inst.isOver) {
|
|
inst.isOver = 0;
|
|
instDraggable.cancelHelperRemoval = true; //Don't remove the helper in the draggable instance
|
|
inst.cancelHelperRemoval = false; //Remove it in the sortable instance (so sortable plugins like revert still work)
|
|
if(inst.shouldRevert) inst.options.revert = true; //revert here
|
|
inst.stop(e);
|
|
inst.options.helper = "original";
|
|
}
|
|
},
|
|
drag: function(e,ui) {
|
|
//This is handy: We reuse the intersectsWith method for checking if the current draggable helper
|
|
//intersects with the sortable container
|
|
var instDraggable = $(this).data("draggable");
|
|
var inst = instDraggable.sortable;
|
|
instDraggable.position.absolute = ui.absolutePosition; //Sorry, this is an ugly API fix
|
|
|
|
if(inst.intersectsWith.call(instDraggable, {
|
|
left: instDraggable.sortableOffset.left, top: instDraggable.sortableOffset.top,
|
|
width: instDraggable.sortableOuterWidth, height: instDraggable.sortableOuterHeight
|
|
})) {
|
|
//If it intersects, we use a little isOver variable and set it once, so our move-in stuff gets fired only once
|
|
if(!inst.isOver) {
|
|
inst.isOver = 1;
|
|
|
|
//Cache the width/height of the new helper
|
|
var height = inst.options.placeholderElement ? $(inst.options.placeholderElement, $(inst.options.items, inst.element)).innerHeight() : $(inst.options.items, inst.element).innerHeight();
|
|
var width = inst.options.placeholderElement ? $(inst.options.placeholderElement, $(inst.options.items, inst.element)).innerWidth() : $(inst.options.items, inst.element).innerWidth();
|
|
|
|
//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)
|
|
inst.currentItem = $(this).clone().appendTo(inst.element);
|
|
inst.options.helper = function() { return ui.helper[0]; };
|
|
inst.start(e);
|
|
|
|
//Because the browser event is way off the new appended portlet, we modify a couple of variables to reflect the changes
|
|
inst.clickOffset.top = instDraggable.offset.click.top;
|
|
inst.clickOffset.left = instDraggable.offset.click.left;
|
|
inst.offset.left -= ui.absolutePosition.left - inst.position.absolute.left;
|
|
inst.offset.top -= ui.absolutePosition.top - inst.position.absolute.top;
|
|
|
|
//Do a nifty little helper animation: Animate it to the portlet's size (just takes the first 'li' element in the sortable now)
|
|
inst.helperProportions = {width: width, height: height}; //We have to reset the helper proportions, because we are doing our animation there
|
|
ui.helper.animate({height: height, width: width}, 500);
|
|
instDraggable.propagate("toSortable", e);
|
|
|
|
}
|
|
|
|
//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(inst.currentItem) inst.drag(e);
|
|
|
|
} 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(inst.isOver) {
|
|
inst.isOver = 0;
|
|
inst.cancelHelperRemoval = true;
|
|
inst.options.revert = false; //No revert here
|
|
inst.stop(e);
|
|
inst.options.helper = "original";
|
|
|
|
//Now we remove our currentItem, the list group clone again, and the placeholder, and animate the helper back to it's original size
|
|
inst.currentItem.remove();
|
|
inst.placeholder.remove();
|
|
|
|
ui.helper.animate({ height: this.innerHeight(), width: this.innerWidth() }, 500);
|
|
instDraggable.propagate("fromSortable", e);
|
|
}
|
|
|
|
};
|
|
}
|
|
});
|
|
|
|
$.ui.plugin.add("draggable", "stack", {
|
|
start: function(e,ui) {
|
|
var group = $.makeArray($(ui.options.stack.group)).sort(function(a,b) {
|
|
return (parseInt($(a).css("zIndex"),10) || ui.options.stack.min) - (parseInt($(b).css("zIndex"),10) || ui.options.stack.min);
|
|
});
|
|
|
|
$(group).each(function(i) {
|
|
this.style.zIndex = ui.options.stack.min + i;
|
|
});
|
|
|
|
this[0].style.zIndex = ui.options.stack.min + group.length;
|
|
}
|
|
});
|
|
|
|
})(jQuery); |