You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
793 lines
21 KiB
793 lines
21 KiB
/**
|
|
* An ItemSet holds a set of items and ranges which can be displayed in a
|
|
* range. The width is determined by the parent of the ItemSet, and the height
|
|
* is determined by the size of the items.
|
|
* @param {Component} parent
|
|
* @param {Component[]} [depends] Components on which this components depends
|
|
* (except for the parent)
|
|
* @param {Object} [options] See ItemSet.setOptions for the available
|
|
* options.
|
|
* @constructor ItemSet
|
|
* @extends Panel
|
|
*/
|
|
// TODO: improve performance by replacing all Array.forEach with a for loop
|
|
function ItemSet(parent, depends, options) {
|
|
this.id = util.randomUUID();
|
|
this.parent = parent;
|
|
this.depends = depends;
|
|
|
|
// event listeners
|
|
this.eventListeners = {
|
|
dragstart: this._onDragStart.bind(this),
|
|
drag: this._onDrag.bind(this),
|
|
dragend: this._onDragEnd.bind(this)
|
|
};
|
|
|
|
// one options object is shared by this itemset and all its items
|
|
this.options = options || {};
|
|
this.defaultOptions = {
|
|
type: 'box',
|
|
align: 'center',
|
|
orientation: 'bottom',
|
|
margin: {
|
|
axis: 20,
|
|
item: 10
|
|
},
|
|
padding: 5
|
|
};
|
|
|
|
this.dom = {};
|
|
|
|
var me = this;
|
|
this.itemsData = null; // DataSet
|
|
this.range = null; // Range or Object {start: number, end: number}
|
|
|
|
// data change listeners
|
|
this.listeners = {
|
|
'add': function (event, params, senderId) {
|
|
if (senderId != me.id) {
|
|
me._onAdd(params.items);
|
|
}
|
|
},
|
|
'update': function (event, params, senderId) {
|
|
if (senderId != me.id) {
|
|
me._onUpdate(params.items);
|
|
}
|
|
},
|
|
'remove': function (event, params, senderId) {
|
|
if (senderId != me.id) {
|
|
me._onRemove(params.items);
|
|
}
|
|
}
|
|
};
|
|
|
|
this.items = {}; // object with an Item for every data item
|
|
this.selection = []; // list with the ids of all selected nodes
|
|
this.queue = {}; // queue with id/actions: 'add', 'update', 'delete'
|
|
this.stack = new Stack(this, Object.create(this.options));
|
|
this.conversion = null;
|
|
|
|
this.touchParams = {}; // stores properties while dragging
|
|
|
|
// TODO: ItemSet should also attach event listeners for rangechange and rangechanged, like timeaxis
|
|
}
|
|
|
|
ItemSet.prototype = new Panel();
|
|
|
|
// available item types will be registered here
|
|
ItemSet.types = {
|
|
box: ItemBox,
|
|
range: ItemRange,
|
|
rangeoverflow: ItemRangeOverflow,
|
|
point: ItemPoint
|
|
};
|
|
|
|
/**
|
|
* Set options for the ItemSet. Existing options will be extended/overwritten.
|
|
* @param {Object} [options] The following options are available:
|
|
* {String | function} [className]
|
|
* class name for the itemset
|
|
* {String} [type]
|
|
* Default type for the items. Choose from 'box'
|
|
* (default), 'point', or 'range'. The default
|
|
* Style can be overwritten by individual items.
|
|
* {String} align
|
|
* Alignment for the items, only applicable for
|
|
* ItemBox. Choose 'center' (default), 'left', or
|
|
* 'right'.
|
|
* {String} orientation
|
|
* Orientation of the item set. Choose 'top' or
|
|
* 'bottom' (default).
|
|
* {Number} margin.axis
|
|
* Margin between the axis and the items in pixels.
|
|
* Default is 20.
|
|
* {Number} margin.item
|
|
* Margin between items in pixels. Default is 10.
|
|
* {Number} padding
|
|
* Padding of the contents of an item in pixels.
|
|
* Must correspond with the items css. Default is 5.
|
|
*/
|
|
ItemSet.prototype.setOptions = Component.prototype.setOptions;
|
|
|
|
|
|
|
|
/**
|
|
* Set controller for this component
|
|
* @param {Controller | null} controller
|
|
*/
|
|
ItemSet.prototype.setController = function setController (controller) {
|
|
var event;
|
|
|
|
// unregister old event listeners
|
|
if (this.controller) {
|
|
for (event in this.eventListeners) {
|
|
if (this.eventListeners.hasOwnProperty(event)) {
|
|
this.controller.off(event, this.eventListeners[event]);
|
|
}
|
|
}
|
|
}
|
|
|
|
this.controller = controller || null;
|
|
|
|
// register new event listeners
|
|
if (this.controller) {
|
|
for (event in this.eventListeners) {
|
|
if (this.eventListeners.hasOwnProperty(event)) {
|
|
this.controller.on(event, this.eventListeners[event]);
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
// attach event listeners for dragging items to the controller
|
|
(function (me) {
|
|
var _controller = null;
|
|
var _onDragStart = null;
|
|
var _onDrag = null;
|
|
var _onDragEnd = null;
|
|
|
|
Object.defineProperty(me, 'controller', {
|
|
get: function () {
|
|
return _controller;
|
|
},
|
|
|
|
set: function (controller) {
|
|
|
|
}
|
|
});
|
|
}) (this);
|
|
|
|
|
|
/**
|
|
* Set range (start and end).
|
|
* @param {Range | Object} range A Range or an object containing start and end.
|
|
*/
|
|
ItemSet.prototype.setRange = function setRange(range) {
|
|
if (!(range instanceof Range) && (!range || !range.start || !range.end)) {
|
|
throw new TypeError('Range must be an instance of Range, ' +
|
|
'or an object containing start and end.');
|
|
}
|
|
this.range = range;
|
|
};
|
|
|
|
/**
|
|
* Set selected items by their id. Replaces the current selection
|
|
* Unknown id's are silently ignored.
|
|
* @param {Array} [ids] An array with zero or more id's of the items to be
|
|
* selected. If ids is an empty array, all items will be
|
|
* unselected.
|
|
*/
|
|
ItemSet.prototype.setSelection = function setSelection(ids) {
|
|
var i, ii, id, item, selection;
|
|
|
|
if (ids) {
|
|
if (!Array.isArray(ids)) {
|
|
throw new TypeError('Array expected');
|
|
}
|
|
|
|
// unselect currently selected items
|
|
for (i = 0, ii = this.selection.length; i < ii; i++) {
|
|
id = this.selection[i];
|
|
item = this.items[id];
|
|
if (item) item.unselect();
|
|
}
|
|
|
|
// select items
|
|
this.selection = [];
|
|
for (i = 0, ii = ids.length; i < ii; i++) {
|
|
id = ids[i];
|
|
item = this.items[id];
|
|
if (item) {
|
|
this.selection.push(id);
|
|
item.select();
|
|
}
|
|
}
|
|
|
|
// trigger a select event
|
|
selection = this.selection.concat([]);
|
|
events.trigger(this, 'select', {
|
|
ids: selection
|
|
});
|
|
|
|
if (this.controller) {
|
|
this.requestRepaint();
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Get the selected items by their id
|
|
* @return {Array} ids The ids of the selected items
|
|
*/
|
|
ItemSet.prototype.getSelection = function getSelection() {
|
|
return this.selection.concat([]);
|
|
};
|
|
|
|
/**
|
|
* Deselect a selected item
|
|
* @param {String | Number} id
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._deselect = function _deselect(id) {
|
|
var selection = this.selection;
|
|
for (var i = 0, ii = selection.length; i < ii; i++) {
|
|
if (selection[i] == id) { // non-strict comparison!
|
|
selection.splice(i, 1);
|
|
break;
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Repaint the component
|
|
* @return {Boolean} changed
|
|
*/
|
|
ItemSet.prototype.repaint = function repaint() {
|
|
var changed = 0,
|
|
update = util.updateProperty,
|
|
asSize = util.option.asSize,
|
|
options = this.options,
|
|
orientation = this.getOption('orientation'),
|
|
defaultOptions = this.defaultOptions,
|
|
frame = this.frame;
|
|
|
|
if (!frame) {
|
|
frame = document.createElement('div');
|
|
frame.className = 'itemset';
|
|
frame['timeline-itemset'] = this;
|
|
|
|
var className = options.className;
|
|
if (className) {
|
|
util.addClassName(frame, util.option.asString(className));
|
|
}
|
|
|
|
// create background panel
|
|
var background = document.createElement('div');
|
|
background.className = 'background';
|
|
frame.appendChild(background);
|
|
this.dom.background = background;
|
|
|
|
// create foreground panel
|
|
var foreground = document.createElement('div');
|
|
foreground.className = 'foreground';
|
|
frame.appendChild(foreground);
|
|
this.dom.foreground = foreground;
|
|
|
|
// create axis panel
|
|
var axis = document.createElement('div');
|
|
axis.className = 'itemset-axis';
|
|
//frame.appendChild(axis);
|
|
this.dom.axis = axis;
|
|
|
|
this.frame = frame;
|
|
changed += 1;
|
|
}
|
|
|
|
if (!this.parent) {
|
|
throw new Error('Cannot repaint itemset: no parent attached');
|
|
}
|
|
var parentContainer = this.parent.getContainer();
|
|
if (!parentContainer) {
|
|
throw new Error('Cannot repaint itemset: parent has no container element');
|
|
}
|
|
if (!frame.parentNode) {
|
|
parentContainer.appendChild(frame);
|
|
changed += 1;
|
|
}
|
|
if (!this.dom.axis.parentNode) {
|
|
parentContainer.appendChild(this.dom.axis);
|
|
changed += 1;
|
|
}
|
|
|
|
// reposition frame
|
|
changed += update(frame.style, 'left', asSize(options.left, '0px'));
|
|
changed += update(frame.style, 'top', asSize(options.top, '0px'));
|
|
changed += update(frame.style, 'width', asSize(options.width, '100%'));
|
|
changed += update(frame.style, 'height', asSize(options.height, this.height + 'px'));
|
|
|
|
// reposition axis
|
|
changed += update(this.dom.axis.style, 'left', asSize(options.left, '0px'));
|
|
changed += update(this.dom.axis.style, 'width', asSize(options.width, '100%'));
|
|
if (orientation == 'bottom') {
|
|
changed += update(this.dom.axis.style, 'top', (this.height + this.top) + 'px');
|
|
}
|
|
else { // orientation == 'top'
|
|
changed += update(this.dom.axis.style, 'top', this.top + 'px');
|
|
}
|
|
|
|
this._updateConversion();
|
|
|
|
var me = this,
|
|
queue = this.queue,
|
|
itemsData = this.itemsData,
|
|
items = this.items,
|
|
dataOptions = {
|
|
// TODO: cleanup
|
|
// fields: [(itemsData && itemsData.fieldId || 'id'), 'start', 'end', 'content', 'type', 'className']
|
|
};
|
|
|
|
// show/hide added/changed/removed items
|
|
for (var id in queue) {
|
|
if (queue.hasOwnProperty(id)) {
|
|
var entry = queue[id],
|
|
item = items[id],
|
|
action = entry.action;
|
|
|
|
//noinspection FallthroughInSwitchStatementJS
|
|
switch (action) {
|
|
case 'add':
|
|
case 'update':
|
|
var itemData = itemsData && itemsData.get(id, dataOptions);
|
|
|
|
if (itemData) {
|
|
var type = itemData.type ||
|
|
(itemData.start && itemData.end && 'range') ||
|
|
options.type ||
|
|
'box';
|
|
var constructor = ItemSet.types[type];
|
|
|
|
// TODO: how to handle items with invalid data? hide them and give a warning? or throw an error?
|
|
if (item) {
|
|
// update item
|
|
if (!constructor || !(item instanceof constructor)) {
|
|
// item type has changed, hide and delete the item
|
|
changed += item.hide();
|
|
item = null;
|
|
}
|
|
else {
|
|
item.data = itemData; // TODO: create a method item.setData ?
|
|
changed++;
|
|
}
|
|
}
|
|
|
|
if (!item) {
|
|
// create item
|
|
if (constructor) {
|
|
item = new constructor(me, itemData, options, defaultOptions);
|
|
item.id = entry.id; // we take entry.id, as id itself is stringified
|
|
changed++;
|
|
}
|
|
else {
|
|
throw new TypeError('Unknown item type "' + type + '"');
|
|
}
|
|
}
|
|
|
|
// force a repaint (not only a reposition)
|
|
item.repaint();
|
|
|
|
items[id] = item;
|
|
}
|
|
|
|
// update queue
|
|
delete queue[id];
|
|
break;
|
|
|
|
case 'remove':
|
|
if (item) {
|
|
// remove the item from the set selected items
|
|
if (item.selected) {
|
|
me._deselect(id);
|
|
}
|
|
|
|
// remove DOM of the item
|
|
changed += item.hide();
|
|
}
|
|
|
|
// update lists
|
|
delete items[id];
|
|
delete queue[id];
|
|
break;
|
|
|
|
default:
|
|
console.log('Error: unknown action "' + action + '"');
|
|
}
|
|
}
|
|
}
|
|
|
|
// reposition all items. Show items only when in the visible area
|
|
util.forEach(this.items, function (item) {
|
|
if (item.visible) {
|
|
changed += item.show();
|
|
item.reposition();
|
|
}
|
|
else {
|
|
changed += item.hide();
|
|
}
|
|
});
|
|
|
|
return (changed > 0);
|
|
};
|
|
|
|
/**
|
|
* Get the foreground container element
|
|
* @return {HTMLElement} foreground
|
|
*/
|
|
ItemSet.prototype.getForeground = function getForeground() {
|
|
return this.dom.foreground;
|
|
};
|
|
|
|
/**
|
|
* Get the background container element
|
|
* @return {HTMLElement} background
|
|
*/
|
|
ItemSet.prototype.getBackground = function getBackground() {
|
|
return this.dom.background;
|
|
};
|
|
|
|
/**
|
|
* Get the axis container element
|
|
* @return {HTMLElement} axis
|
|
*/
|
|
ItemSet.prototype.getAxis = function getAxis() {
|
|
return this.dom.axis;
|
|
};
|
|
|
|
/**
|
|
* Reflow the component
|
|
* @return {Boolean} resized
|
|
*/
|
|
ItemSet.prototype.reflow = function reflow () {
|
|
var changed = 0,
|
|
options = this.options,
|
|
marginAxis = options.margin && options.margin.axis || this.defaultOptions.margin.axis,
|
|
marginItem = options.margin && options.margin.item || this.defaultOptions.margin.item,
|
|
update = util.updateProperty,
|
|
asNumber = util.option.asNumber,
|
|
asSize = util.option.asSize,
|
|
frame = this.frame;
|
|
|
|
if (frame) {
|
|
this._updateConversion();
|
|
|
|
util.forEach(this.items, function (item) {
|
|
changed += item.reflow();
|
|
});
|
|
|
|
// TODO: stack.update should be triggered via an event, in stack itself
|
|
// TODO: only update the stack when there are changed items
|
|
this.stack.update();
|
|
|
|
var maxHeight = asNumber(options.maxHeight);
|
|
var fixedHeight = (asSize(options.height) != null);
|
|
var height;
|
|
if (fixedHeight) {
|
|
height = frame.offsetHeight;
|
|
}
|
|
else {
|
|
// height is not specified, determine the height from the height and positioned items
|
|
var visibleItems = this.stack.ordered; // TODO: not so nice way to get the filtered items
|
|
if (visibleItems.length) {
|
|
var min = visibleItems[0].top;
|
|
var max = visibleItems[0].top + visibleItems[0].height;
|
|
util.forEach(visibleItems, function (item) {
|
|
min = Math.min(min, item.top);
|
|
max = Math.max(max, (item.top + item.height));
|
|
});
|
|
height = (max - min) + marginAxis + marginItem;
|
|
}
|
|
else {
|
|
height = marginAxis + marginItem;
|
|
}
|
|
}
|
|
if (maxHeight != null) {
|
|
height = Math.min(height, maxHeight);
|
|
}
|
|
changed += update(this, 'height', height);
|
|
|
|
// calculate height from items
|
|
changed += update(this, 'top', frame.offsetTop);
|
|
changed += update(this, 'left', frame.offsetLeft);
|
|
changed += update(this, 'width', frame.offsetWidth);
|
|
}
|
|
else {
|
|
changed += 1;
|
|
}
|
|
|
|
return (changed > 0);
|
|
};
|
|
|
|
/**
|
|
* Hide this component from the DOM
|
|
* @return {Boolean} changed
|
|
*/
|
|
ItemSet.prototype.hide = function hide() {
|
|
var changed = false;
|
|
|
|
// remove the DOM
|
|
if (this.frame && this.frame.parentNode) {
|
|
this.frame.parentNode.removeChild(this.frame);
|
|
changed = true;
|
|
}
|
|
if (this.dom.axis && this.dom.axis.parentNode) {
|
|
this.dom.axis.parentNode.removeChild(this.dom.axis);
|
|
changed = true;
|
|
}
|
|
|
|
return changed;
|
|
};
|
|
|
|
/**
|
|
* Set items
|
|
* @param {vis.DataSet | null} items
|
|
*/
|
|
ItemSet.prototype.setItems = function setItems(items) {
|
|
var me = this,
|
|
ids,
|
|
oldItemsData = this.itemsData;
|
|
|
|
// replace the dataset
|
|
if (!items) {
|
|
this.itemsData = null;
|
|
}
|
|
else if (items instanceof DataSet || items instanceof DataView) {
|
|
this.itemsData = items;
|
|
}
|
|
else {
|
|
throw new TypeError('Data must be an instance of DataSet');
|
|
}
|
|
|
|
if (oldItemsData) {
|
|
// unsubscribe from old dataset
|
|
util.forEach(this.listeners, function (callback, event) {
|
|
oldItemsData.unsubscribe(event, callback);
|
|
});
|
|
|
|
// remove all drawn items
|
|
ids = oldItemsData.getIds();
|
|
this._onRemove(ids);
|
|
}
|
|
|
|
if (this.itemsData) {
|
|
// subscribe to new dataset
|
|
var id = this.id;
|
|
util.forEach(this.listeners, function (callback, event) {
|
|
me.itemsData.subscribe(event, callback, id);
|
|
});
|
|
|
|
// draw all new items
|
|
ids = this.itemsData.getIds();
|
|
this._onAdd(ids);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Get the current items items
|
|
* @returns {vis.DataSet | null}
|
|
*/
|
|
ItemSet.prototype.getItems = function getItems() {
|
|
return this.itemsData;
|
|
};
|
|
|
|
/**
|
|
* Handle updated items
|
|
* @param {Number[]} ids
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._onUpdate = function _onUpdate(ids) {
|
|
this._toQueue('update', ids);
|
|
};
|
|
|
|
/**
|
|
* Handle changed items
|
|
* @param {Number[]} ids
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._onAdd = function _onAdd(ids) {
|
|
this._toQueue('add', ids);
|
|
};
|
|
|
|
/**
|
|
* Handle removed items
|
|
* @param {Number[]} ids
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._onRemove = function _onRemove(ids) {
|
|
this._toQueue('remove', ids);
|
|
};
|
|
|
|
/**
|
|
* Put items in the queue to be added/updated/remove
|
|
* @param {String} action can be 'add', 'update', 'remove'
|
|
* @param {Number[]} ids
|
|
*/
|
|
ItemSet.prototype._toQueue = function _toQueue(action, ids) {
|
|
var queue = this.queue;
|
|
ids.forEach(function (id) {
|
|
queue[id] = {
|
|
id: id,
|
|
action: action
|
|
};
|
|
});
|
|
|
|
if (this.controller) {
|
|
//this.requestReflow();
|
|
this.requestRepaint();
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Calculate the scale and offset to convert a position on screen to the
|
|
* corresponding date and vice versa.
|
|
* After the method _updateConversion is executed once, the methods toTime
|
|
* and toScreen can be used.
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._updateConversion = function _updateConversion() {
|
|
var range = this.range;
|
|
if (!range) {
|
|
throw new Error('No range configured');
|
|
}
|
|
|
|
if (range.conversion) {
|
|
this.conversion = range.conversion(this.width);
|
|
}
|
|
else {
|
|
this.conversion = Range.conversion(range.start, range.end, this.width);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Convert a position on screen (pixels) to a datetime
|
|
* Before this method can be used, the method _updateConversion must be
|
|
* executed once.
|
|
* @param {int} x Position on the screen in pixels
|
|
* @return {Date} time The datetime the corresponds with given position x
|
|
*/
|
|
ItemSet.prototype.toTime = function toTime(x) {
|
|
var conversion = this.conversion;
|
|
return new Date(x / conversion.scale + conversion.offset);
|
|
};
|
|
|
|
/**
|
|
* Convert a datetime (Date object) into a position on the screen
|
|
* Before this method can be used, the method _updateConversion must be
|
|
* executed once.
|
|
* @param {Date} time A date
|
|
* @return {int} x The position on the screen in pixels which corresponds
|
|
* with the given date.
|
|
*/
|
|
ItemSet.prototype.toScreen = function toScreen(time) {
|
|
var conversion = this.conversion;
|
|
return (time.valueOf() - conversion.offset) * conversion.scale;
|
|
};
|
|
|
|
/**
|
|
* Start dragging the selected events
|
|
* @param {Event} event
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._onDragStart = function (event) {
|
|
var itemSet = ItemSet.itemSetFromTarget(event),
|
|
item = ItemSet.itemFromTarget(event),
|
|
me = this;
|
|
|
|
if (item && item.selected) {
|
|
this.touchParams.items = this.getSelection().map(function (id) {
|
|
return me.items[id];
|
|
});
|
|
|
|
event.stopPropagation();
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Drag selected items
|
|
* @param {Event} event
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._onDrag = function (event) {
|
|
if (this.touchParams.items) {
|
|
var deltaX = event.gesture.deltaX;
|
|
|
|
// adjust the offset of the items being dragged
|
|
this.touchParams.items.forEach(function (item) {
|
|
item.setOffset(deltaX);
|
|
});
|
|
|
|
// TODO: implement snapping to nice dates
|
|
|
|
// TODO: implement dragging from one group to another
|
|
|
|
this.requestReflow();
|
|
|
|
event.stopPropagation();
|
|
}
|
|
};
|
|
|
|
/**
|
|
* End of dragging selected items
|
|
* @param {Event} event
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._onDragEnd = function (event) {
|
|
if (this.touchParams.items) {
|
|
var deltaX = event.gesture.deltaX,
|
|
scale = this.conversion.scale;
|
|
|
|
// prepare a changeset for the changed items
|
|
var changes = this.touchParams.items.map(function (item) {
|
|
item.setOffset(0);
|
|
|
|
var change = {
|
|
id: item.id
|
|
};
|
|
|
|
if ('start' in item.data) {
|
|
change.start = new Date(item.data.start.valueOf() + deltaX / scale);
|
|
}
|
|
if ('end' in item.data) {
|
|
change.end = new Date(item.data.end.valueOf() + deltaX / scale);
|
|
}
|
|
|
|
return change;
|
|
});
|
|
this.touchParams.items = null;
|
|
|
|
// find the root DataSet from our DataSet/DataView
|
|
var data = this.itemsData;
|
|
while (data instanceof DataView) {
|
|
data = data.data;
|
|
}
|
|
|
|
// apply the changes to the data
|
|
data.update(changes);
|
|
|
|
event.stopPropagation();
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Find an item from an event target:
|
|
* searches for the attribute 'timeline-item' in the event target's element tree
|
|
* @param {Event} event
|
|
* @return {Item | null} item
|
|
*/
|
|
ItemSet.itemFromTarget = function itemFromTarget (event) {
|
|
var target = event.target;
|
|
while (target) {
|
|
if (target.hasOwnProperty('timeline-item')) {
|
|
return target['timeline-item'];
|
|
}
|
|
target = target.parentNode;
|
|
}
|
|
|
|
return null;
|
|
};
|
|
|
|
/**
|
|
* Find the ItemSet from an event target:
|
|
* searches for the attribute 'timeline-itemset' in the event target's element tree
|
|
* @param {Event} event
|
|
* @return {ItemSet | null} item
|
|
*/
|
|
ItemSet.itemSetFromTarget = function itemSetFromTarget (event) {
|
|
var target = event.target;
|
|
while (target) {
|
|
if (target.hasOwnProperty('timeline-itemset')) {
|
|
return target['timeline-itemset'];
|
|
}
|
|
target = target.parentNode;
|
|
}
|
|
|
|
return null;
|
|
};
|