vis.js is a dynamic, browser-based visualization library
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var Hammer = require('../../module/hammer');
var util = require('../../util');
var DataSet = require('../../DataSet');
var DataView = require('../../DataView');
var TimeStep = require('../TimeStep');
var Component = require('./Component');
var Group = require('./Group');
var BackgroundGroup = require('./BackgroundGroup');
var BoxItem = require('./item/BoxItem');
var PointItem = require('./item/PointItem');
var RangeItem = require('./item/RangeItem');
var BackgroundItem = require('./item/BackgroundItem');
var UNGROUPED = '__ungrouped__'; // reserved group id for ungrouped items
var BACKGROUND = '__background__'; // reserved group id for background items without group
/**
* 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 {{dom: Object, domProps: Object, emitter: Emitter, range: Range}} body
* @param {Object} [options] See ItemSet.setOptions for the available options.
* @constructor ItemSet
* @extends Component
*/
function ItemSet(body, options) {
this.body = body;
this.defaultOptions = {
type: null, // 'box', 'point', 'range', 'background'
orientation: {
item: 'bottom' // item orientation: 'top' or 'bottom'
},
align: 'auto', // alignment of box items
stack: true,
groupOrderSwap: function(fromGroup, toGroup, groups) {
var targetOrder = toGroup.order;
toGroup.order = fromGroup.order;
fromGroup.order = targetOrder;
},
groupOrder: 'order',
selectable: true,
multiselect: false,
itemsAlwaysDraggable: false,
editable: {
updateTime: false,
updateGroup: false,
add: false,
remove: false,
overrideItems: false
},
groupEditable: {
order: false,
add: false,
remove: false
},
snap: TimeStep.snap,
onAdd: function (item, callback) {
callback(item);
},
onUpdate: function (item, callback) {
callback(item);
},
onMove: function (item, callback) {
callback(item);
},
onRemove: function (item, callback) {
callback(item);
},
onMoving: function (item, callback) {
callback(item);
},
onAddGroup: function (item, callback) {
callback(item);
},
onMoveGroup: function (item, callback) {
callback(item);
},
onRemoveGroup: function (item, callback) {
callback(item);
},
margin: {
item: {
horizontal: 10,
vertical: 10
},
axis: 20
},
tooltipOnItemUpdateTime: false
};
// options is shared by this ItemSet and all its items
this.options = util.extend({}, this.defaultOptions);
this.options.rtl = options.rtl;
// options for getting items from the DataSet with the correct type
this.itemOptions = {
type: {start: 'Date', end: 'Date'}
};
this.conversion = {
toScreen: body.util.toScreen,
toTime: body.util.toTime
};
this.dom = {};
this.props = {};
this.hammer = null;
var me = this;
this.itemsData = null; // DataSet
this.groupsData = null; // DataSet
// listeners for the DataSet of the items
this.itemListeners = {
'add': function (event, params, senderId) {
me._onAdd(params.items);
},
'update': function (event, params, senderId) {
me._onUpdate(params.items);
},
'remove': function (event, params, senderId) {
me._onRemove(params.items);
}
};
// listeners for the DataSet of the groups
this.groupListeners = {
'add': function (event, params, senderId) {
me._onAddGroups(params.items);
},
'update': function (event, params, senderId) {
me._onUpdateGroups(params.items);
},
'remove': function (event, params, senderId) {
me._onRemoveGroups(params.items);
}
};
this.items = {}; // object with an Item for every data item
this.groups = {}; // Group object for every group
this.groupIds = [];
this.selection = []; // list with the ids of all selected nodes
this.stackDirty = true; // if true, all items will be restacked on next redraw
this.touchParams = {}; // stores properties while dragging
this.groupTouchParams = {};
// create the HTML DOM
this._create();
this.setOptions(options);
}
ItemSet.prototype = new Component();
// available item types will be registered here
ItemSet.types = {
background: BackgroundItem,
box: BoxItem,
range: RangeItem,
point: PointItem
};
/**
* Create the HTML DOM for the ItemSet
*/
ItemSet.prototype._create = function(){
var frame = document.createElement('div');
frame.className = 'vis-itemset';
frame['timeline-itemset'] = this;
this.dom.frame = frame;
// create background panel
var background = document.createElement('div');
background.className = 'vis-background';
frame.appendChild(background);
this.dom.background = background;
// create foreground panel
var foreground = document.createElement('div');
foreground.className = 'vis-foreground';
frame.appendChild(foreground);
this.dom.foreground = foreground;
// create axis panel
var axis = document.createElement('div');
axis.className = 'vis-axis';
this.dom.axis = axis;
// create labelset
var labelSet = document.createElement('div');
labelSet.className = 'vis-labelset';
this.dom.labelSet = labelSet;
// create ungrouped Group
this._updateUngrouped();
// create background Group
var backgroundGroup = new BackgroundGroup(BACKGROUND, null, this);
backgroundGroup.show();
this.groups[BACKGROUND] = backgroundGroup;
// attach event listeners
// Note: we bind to the centerContainer for the case where the height
// of the center container is larger than of the ItemSet, so we
// can click in the empty area to create a new item or deselect an item.
this.hammer = new Hammer(this.body.dom.centerContainer);
// drag items when selected
this.hammer.on('hammer.input', function (event) {
if (event.isFirst) {
this._onTouch(event);
}
}.bind(this));
this.hammer.on('panstart', this._onDragStart.bind(this));
this.hammer.on('panmove', this._onDrag.bind(this));
this.hammer.on('panend', this._onDragEnd.bind(this));
this.hammer.get('pan').set({threshold:5, direction: Hammer.DIRECTION_HORIZONTAL});
// single select (or unselect) when tapping an item
this.hammer.on('tap', this._onSelectItem.bind(this));
// multi select when holding mouse/touch, or on ctrl+click
this.hammer.on('press', this._onMultiSelectItem.bind(this));
// add item on doubletap
this.hammer.on('doubletap', this._onAddItem.bind(this));
if (this.options.rtl) {
this.groupHammer = new Hammer(this.body.dom.rightContainer);
} else {
this.groupHammer = new Hammer(this.body.dom.leftContainer);
}
this.groupHammer.on('panstart', this._onGroupDragStart.bind(this));
this.groupHammer.on('panmove', this._onGroupDrag.bind(this));
this.groupHammer.on('panend', this._onGroupDragEnd.bind(this));
this.groupHammer.get('pan').set({threshold:5, direction: Hammer.DIRECTION_VERTICAL});
this.body.dom.centerContainer.addEventListener('mouseover', this._onMouseOver.bind(this));
this.body.dom.centerContainer.addEventListener('mouseout', this._onMouseOut.bind(this));
// attach to the DOM
this.show();
};
/**
* Set options for the ItemSet. Existing options will be extended/overwritten.
* @param {Object} [options] The following options are available:
* {String} type
* Default type for the items. Choose from 'box'
* (default), 'point', 'range', or 'background'.
* The default style can be overwritten by
* individual items.
* {String} align
* Alignment for the items, only applicable for
* BoxItem. Choose 'center' (default), 'left', or
* 'right'.
* {String} orientation.item
* Orientation of the item set. Choose 'top' or
* 'bottom' (default).
* {Function} groupOrder
* A sorting function for ordering groups
* {Boolean} stack
* If true (default), items will be stacked on
* top of each other.
* {Number} margin.axis
* Margin between the axis and the items in pixels.
* Default is 20.
* {Number} margin.item.horizontal
* Horizontal margin between items in pixels.
* Default is 10.
* {Number} margin.item.vertical
* Vertical Margin between items in pixels.
* Default is 10.
* {Number} margin.item
* Margin between items in pixels in both horizontal
* and vertical direction. Default is 10.
* {Number} margin
* Set margin for both axis and items in pixels.
* {Boolean} selectable
* If true (default), items can be selected.
* {Boolean} multiselect
* If true, multiple items can be selected.
* False by default.
* {Boolean} editable
* Set all editable options to true or false
* {Boolean} editable.updateTime
* Allow dragging an item to an other moment in time
* {Boolean} editable.updateGroup
* Allow dragging an item to an other group
* {Boolean} editable.add
* Allow creating new items on double tap
* {Boolean} editable.remove
* Allow removing items by clicking the delete button
* top right of a selected item.
* {Function(item: Item, callback: Function)} onAdd
* Callback function triggered when an item is about to be added:
* when the user double taps an empty space in the Timeline.
* {Function(item: Item, callback: Function)} onUpdate
* Callback function fired when an item is about to be updated.
* This function typically has to show a dialog where the user
* change the item. If not implemented, nothing happens.
* {Function(item: Item, callback: Function)} onMove
* Fired when an item has been moved. If not implemented,
* the move action will be accepted.
* {Function(item: Item, callback: Function)} onRemove
* Fired when an item is about to be deleted.
* If not implemented, the item will be always removed.
*/
ItemSet.prototype.setOptions = function(options) {
if (options) {
// copy all options that we know
var fields = [
'type', 'rtl', 'align', 'order', 'stack', 'selectable', 'multiselect', 'itemsAlwaysDraggable',
'multiselectPerGroup', 'groupOrder', 'dataAttributes', 'template', 'groupTemplate', 'hide', 'snap',
'groupOrderSwap', 'tooltipOnItemUpdateTime'
];
util.selectiveExtend(fields, this.options, options);
if ('orientation' in options) {
if (typeof options.orientation === 'string') {
this.options.orientation.item = options.orientation === 'top' ? 'top' : 'bottom';
}
else if (typeof options.orientation === 'object' && 'item' in options.orientation) {
this.options.orientation.item = options.orientation.item;
}
}
if ('margin' in options) {
if (typeof options.margin === 'number') {
this.options.margin.axis = options.margin;
this.options.margin.item.horizontal = options.margin;
this.options.margin.item.vertical = options.margin;
}
else if (typeof options.margin === 'object') {
util.selectiveExtend(['axis'], this.options.margin, options.margin);
if ('item' in options.margin) {
if (typeof options.margin.item === 'number') {
this.options.margin.item.horizontal = options.margin.item;
this.options.margin.item.vertical = options.margin.item;
}
else if (typeof options.margin.item === 'object') {
util.selectiveExtend(['horizontal', 'vertical'], this.options.margin.item, options.margin.item);
}
}
}
}
if ('editable' in options) {
if (typeof options.editable === 'boolean') {
this.options.editable.updateTime = options.editable;
this.options.editable.updateGroup = options.editable;
this.options.editable.add = options.editable;
this.options.editable.remove = options.editable;
this.options.editable.overrideItems = false;
}
else if (typeof options.editable === 'object') {
util.selectiveExtend(['updateTime', 'updateGroup', 'add', 'remove', 'overrideItems'], this.options.editable, options.editable);
}
}
if ('groupEditable' in options) {
if (typeof options.groupEditable === 'boolean') {
this.options.groupEditable.order = options.groupEditable;
this.options.groupEditable.add = options.groupEditable;
this.options.groupEditable.remove = options.groupEditable;
}
else if (typeof options.groupEditable === 'object') {
util.selectiveExtend(['order', 'add', 'remove'], this.options.groupEditable, options.groupEditable);
}
}
// callback functions
var addCallback = (function (name) {
var fn = options[name];
if (fn) {
if (!(fn instanceof Function)) {
throw new Error('option ' + name + ' must be a function ' + name + '(item, callback)');
}
this.options[name] = fn;
}
}).bind(this);
['onAdd', 'onUpdate', 'onRemove', 'onMove', 'onMoving', 'onAddGroup', 'onMoveGroup', 'onRemoveGroup'].forEach(addCallback);
// force the itemSet to refresh: options like orientation and margins may be changed
this.markDirty();
}
};
/**
* Mark the ItemSet dirty so it will refresh everything with next redraw.
* Optionally, all items can be marked as dirty and be refreshed.
* @param {{refreshItems: boolean}} [options]
*/
ItemSet.prototype.markDirty = function(options) {
this.groupIds = [];
this.stackDirty = true;
if (options && options.refreshItems) {
util.forEach(this.items, function (item) {
item.dirty = true;
if (item.displayed) item.redraw();
});
}
};
/**
* Destroy the ItemSet
*/
ItemSet.prototype.destroy = function() {
this.hide();
this.setItems(null);
this.setGroups(null);
this.hammer = null;
this.body = null;
this.conversion = null;
};
/**
* Hide the component from the DOM
*/
ItemSet.prototype.hide = function() {
// remove the frame containing the items
if (this.dom.frame.parentNode) {
this.dom.frame.parentNode.removeChild(this.dom.frame);
}
// remove the axis with dots
if (this.dom.axis.parentNode) {
this.dom.axis.parentNode.removeChild(this.dom.axis);
}
// remove the labelset containing all group labels
if (this.dom.labelSet.parentNode) {
this.dom.labelSet.parentNode.removeChild(this.dom.labelSet);
}
};
/**
* Show the component in the DOM (when not already visible).
* @return {Boolean} changed
*/
ItemSet.prototype.show = function() {
// show frame containing the items
if (!this.dom.frame.parentNode) {
this.body.dom.center.appendChild(this.dom.frame);
}
// show axis with dots
if (!this.dom.axis.parentNode) {
this.body.dom.backgroundVertical.appendChild(this.dom.axis);
}
// show labelset containing labels
if (!this.dom.labelSet.parentNode) {
if (this.options.rtl) {
this.body.dom.right.appendChild(this.dom.labelSet);
} else {
this.body.dom.left.appendChild(this.dom.labelSet);
}
}
};
/**
* Set selected items by their id. Replaces the current selection
* Unknown id's are silently ignored.
* @param {string[] | string} [ids] An array with zero or more id's of the items to be
* selected, or a single item id. If ids is undefined
* or an empty array, all items will be unselected.
*/
ItemSet.prototype.setSelection = function(ids) {
var i, ii, id, item;
if (ids == undefined) ids = [];
if (!Array.isArray(ids)) ids = [ids];
// 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();
}
}
};
/**
* Get the selected items by their id
* @return {Array} ids The ids of the selected items
*/
ItemSet.prototype.getSelection = function() {
return this.selection.concat([]);
};
/**
* Get the id's of the currently visible items.
* @returns {Array} The ids of the visible items
*/
ItemSet.prototype.getVisibleItems = function() {
var range = this.body.range.getRange();
if (this.options.rtl) {
var right = this.body.util.toScreen(range.start);
var left = this.body.util.toScreen(range.end);
} else {
var left = this.body.util.toScreen(range.start);
var right = this.body.util.toScreen(range.end);
}
var ids = [];
for (var groupId in this.groups) {
if (this.groups.hasOwnProperty(groupId)) {
var group = this.groups[groupId];
var rawVisibleItems = group.visibleItems;
// filter the "raw" set with visibleItems into a set which is really
// visible by pixels
for (var i = 0; i < rawVisibleItems.length; i++) {
var item = rawVisibleItems[i];
// TODO: also check whether visible vertically
if (this.options.rtl) {
if ((item.right < left) && (item.right + item.width > right)) {
ids.push(item.id);
}
} else {
if ((item.left < right) && (item.left + item.width > left)) {
ids.push(item.id);
}
}
}
}
}
return ids;
};
/**
* Deselect a selected item
* @param {String | Number} id
* @private
*/
ItemSet.prototype._deselect = function(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} Returns true if the component is resized
*/
ItemSet.prototype.redraw = function() {
var margin = this.options.margin,
range = this.body.range,
asSize = util.option.asSize,
options = this.options,
orientation = options.orientation.item,
resized = false,
frame = this.dom.frame;
// recalculate absolute position (before redrawing groups)
this.props.top = this.body.domProps.top.height + this.body.domProps.border.top;
if (this.options.rtl) {
this.props.right = this.body.domProps.right.width + this.body.domProps.border.right;
} else {
this.props.left = this.body.domProps.left.width + this.body.domProps.border.left;
}
// update class name
frame.className = 'vis-itemset';
// reorder the groups (if needed)
resized = this._orderGroups() || resized;
// check whether zoomed (in that case we need to re-stack everything)
// TODO: would be nicer to get this as a trigger from Range
var visibleInterval = range.end - range.start;
var zoomed = (visibleInterval != this.lastVisibleInterval) || (this.props.width != this.props.lastWidth);
if (zoomed) this.stackDirty = true;
this.lastVisibleInterval = visibleInterval;
this.props.lastWidth = this.props.width;
var restack = this.stackDirty;
var firstGroup = this._firstGroup();
var firstMargin = {
item: margin.item,
axis: margin.axis
};
var nonFirstMargin = {
item: margin.item,
axis: margin.item.vertical / 2
};
var height = 0;
var minHeight = margin.axis + margin.item.vertical;
// redraw the background group
this.groups[BACKGROUND].redraw(range, nonFirstMargin, restack);
// redraw all regular groups
util.forEach(this.groups, function (group) {
var groupMargin = (group == firstGroup) ? firstMargin : nonFirstMargin;
var groupResized = group.redraw(range, groupMargin, restack);
resized = groupResized || resized;
height += group.height;
});
height = Math.max(height, minHeight);
this.stackDirty = false;
// update frame height
frame.style.height = asSize(height);
// calculate actual size
this.props.width = frame.offsetWidth;
this.props.height = height;
// reposition axis
this.dom.axis.style.top = asSize((orientation == 'top') ?
(this.body.domProps.top.height + this.body.domProps.border.top) :
(this.body.domProps.top.height + this.body.domProps.centerContainer.height));
if (this.options.rtl) {
this.dom.axis.style.right = '0';
} else {
this.dom.axis.style.left = '0';
}
this.initialItemSetDrawn = true;
// check if this component is resized
resized = this._isResized() || resized;
return resized;
};
/**
* Get the first group, aligned with the axis
* @return {Group | null} firstGroup
* @private
*/
ItemSet.prototype._firstGroup = function() {
var firstGroupIndex = (this.options.orientation.item == 'top') ? 0 : (this.groupIds.length - 1);
var firstGroupId = this.groupIds[firstGroupIndex];
var firstGroup = this.groups[firstGroupId] || this.groups[UNGROUPED];
return firstGroup || null;
};
/**
* Create or delete the group holding all ungrouped items. This group is used when
* there are no groups specified.
* @protected
*/
ItemSet.prototype._updateUngrouped = function() {
var ungrouped = this.groups[UNGROUPED];
var background = this.groups[BACKGROUND];
var item, itemId;
if (this.groupsData) {
// remove the group holding all ungrouped items
if (ungrouped) {
ungrouped.hide();
delete this.groups[UNGROUPED];
for (itemId in this.items) {
if (this.items.hasOwnProperty(itemId)) {
item = this.items[itemId];
item.parent && item.parent.remove(item);
var groupId = this._getGroupId(item.data);
var group = this.groups[groupId];
group && group.add(item) || item.hide();
}
}
}
}
else {
// create a group holding all (unfiltered) items
if (!ungrouped) {
var id = null;
var data = null;
ungrouped = new Group(id, data, this);
this.groups[UNGROUPED] = ungrouped;
for (itemId in this.items) {
if (this.items.hasOwnProperty(itemId)) {
item = this.items[itemId];
ungrouped.add(item);
}
}
ungrouped.show();
}
}
};
/**
* Get the element for the labelset
* @return {HTMLElement} labelSet
*/
ItemSet.prototype.getLabelSet = function() {
return this.dom.labelSet;
};
/**
* Set items
* @param {vis.DataSet | null} items
*/
ItemSet.prototype.setItems = function(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 or DataView');
}
if (oldItemsData) {
// unsubscribe from old dataset
util.forEach(this.itemListeners, function (callback, event) {
oldItemsData.off(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.itemListeners, function (callback, event) {
me.itemsData.on(event, callback, id);
});
// add all new items
ids = this.itemsData.getIds();
this._onAdd(ids);
// update the group holding all ungrouped items
this._updateUngrouped();
}
this.body.emitter.emit('_change', {queue: true});
};
/**
* Get the current items
* @returns {vis.DataSet | null}
*/
ItemSet.prototype.getItems = function() {
return this.itemsData;
};
/**
* Set groups
* @param {vis.DataSet} groups
*/
ItemSet.prototype.setGroups = function(groups) {
var me = this,
ids;
// unsubscribe from current dataset
if (this.groupsData) {
util.forEach(this.groupListeners, function (callback, event) {
me.groupsData.off(event, callback);
});
// remove all drawn groups
ids = this.groupsData.getIds();
this.groupsData = null;
this._onRemoveGroups(ids); // note: this will cause a redraw
}
// replace the dataset
if (!groups) {
this.groupsData = null;
}
else if (groups instanceof DataSet || groups instanceof DataView) {
this.groupsData = groups;
}
else {
throw new TypeError('Data must be an instance of DataSet or DataView');
}
if (this.groupsData) {
// subscribe to new dataset
var id = this.id;
util.forEach(this.groupListeners, function (callback, event) {
me.groupsData.on(event, callback, id);
});
// draw all ms
ids = this.groupsData.getIds();
this._onAddGroups(ids);
}
// update the group holding all ungrouped items
this._updateUngrouped();
// update the order of all items in each group
this._order();
this.body.emitter.emit('_change', {queue: true});
};
/**
* Get the current groups
* @returns {vis.DataSet | null} groups
*/
ItemSet.prototype.getGroups = function() {
return this.groupsData;
};
/**
* Remove an item by its id
* @param {String | Number} id
*/
ItemSet.prototype.removeItem = function(id) {
var item = this.itemsData.get(id),
dataset = this.itemsData.getDataSet();
if (item) {
// confirm deletion
this.options.onRemove(item, function (item) {
if (item) {
// remove by id here, it is possible that an item has no id defined
// itself, so better not delete by the item itself
dataset.remove(id);
}
});
}
};
/**
* Get the time of an item based on it's data and options.type
* @param {Object} itemData
* @returns {string} Returns the type
* @private
*/
ItemSet.prototype._getType = function (itemData) {
return itemData.type || this.options.type || (itemData.end ? 'range' : 'box');
};
/**
* Get the group id for an item
* @param {Object} itemData
* @returns {string} Returns the groupId
* @private
*/
ItemSet.prototype._getGroupId = function (itemData) {
var type = this._getType(itemData);
if (type == 'background' && itemData.group == undefined) {
return BACKGROUND;
}
else {
return this.groupsData ? itemData.group : UNGROUPED;
}
};
/**
* Handle updated items
* @param {Number[]} ids
* @protected
*/
ItemSet.prototype._onUpdate = function(ids) {
var me = this;
ids.forEach(function (id) {
var itemData = me.itemsData.get(id, me.itemOptions);
var item = me.items[id];
var type = itemData ? me._getType(itemData) : null;
var constructor = ItemSet.types[type];
var selected;
if (item) {
// update item
if (!constructor || !(item instanceof constructor)) {
// item type has changed, delete the item and recreate it
selected = item.selected; // preserve selection of this item
me._removeItem(item);
item = null;
}
else {
me._updateItem(item, itemData);
}
}
if (!item && itemData) {
// create item
if (constructor) {
item = new constructor(itemData, me.conversion, me.options);
item.id = id; // TODO: not so nice setting id afterwards
me._addItem(item);
if (selected) {
this.selection.push(id);
item.select();
}
}
else if (type == 'rangeoverflow') {
// TODO: deprecated since version 2.1.0 (or 3.0.0?). cleanup some day
throw new TypeError('Item type "rangeoverflow" is deprecated. Use css styling instead: ' +
'.vis-item.vis-range .vis-item-content {overflow: visible;}');
}
else {
throw new TypeError('Unknown item type "' + type + '"');
}
}
}.bind(this));
this._order();
this.stackDirty = true; // force re-stacking of all items next redraw
this.body.emitter.emit('_change', {queue: true});
};
/**
* Handle added items
* @param {Number[]} ids
* @protected
*/
ItemSet.prototype._onAdd = ItemSet.prototype._onUpdate;
/**
* Handle removed items
* @param {Number[]} ids
* @protected
*/
ItemSet.prototype._onRemove = function(ids) {
var count = 0;
var me = this;
ids.forEach(function (id) {
var item = me.items[id];
if (item) {
count++;
me._removeItem(item);
}
});
if (count) {
// update order
this._order();
this.stackDirty = true; // force re-stacking of all items next redraw
this.body.emitter.emit('_change', {queue: true});
}
};
/**
* Update the order of item in all groups
* @private
*/
ItemSet.prototype._order = function() {
// reorder the items in all groups
// TODO: optimization: only reorder groups affected by the changed items
util.forEach(this.groups, function (group) {
group.order();
});
};
/**
* Handle updated groups
* @param {Number[]} ids
* @private
*/
ItemSet.prototype._onUpdateGroups = function(ids) {
this._onAddGroups(ids);
};
/**
* Handle changed groups (added or updated)
* @param {Number[]} ids
* @private
*/
ItemSet.prototype._onAddGroups = function(ids) {
var me = this;
ids.forEach(function (id) {
var groupData = me.groupsData.get(id);
var group = me.groups[id];
if (!group) {
// check for reserved ids
if (id == UNGROUPED || id == BACKGROUND) {
throw new Error('Illegal group id. ' + id + ' is a reserved id.');
}
var groupOptions = Object.create(me.options);
util.extend(groupOptions, {
height: null
});
group = new Group(id, groupData, me);
me.groups[id] = group;
// add items with this groupId to the new group
for (var itemId in me.items) {
if (me.items.hasOwnProperty(itemId)) {
var item = me.items[itemId];
if (item.data.group == id) {
group.add(item);
}
}
}
group.order();
group.show();
}
else {
// update group
group.setData(groupData);
}
});
this.body.emitter.emit('_change', {queue: true});
};
/**
* Handle removed groups
* @param {Number[]} ids
* @private
*/
ItemSet.prototype._onRemoveGroups = function(ids) {
var groups = this.groups;
ids.forEach(function (id) {
var group = groups[id];
if (group) {
group.hide();
delete groups[id];
}
});
this.markDirty();
this.body.emitter.emit('_change', {queue: true});
};
/**
* Reorder the groups if needed
* @return {boolean} changed
* @private
*/
ItemSet.prototype._orderGroups = function () {
if (this.groupsData) {
// reorder the groups
var groupIds = this.groupsData.getIds({
order: this.options.groupOrder
});
var changed = !util.equalArray(groupIds, this.groupIds);
if (changed) {
// hide all groups, removes them from the DOM
var groups = this.groups;
groupIds.forEach(function (groupId) {
groups[groupId].hide();
});
// show the groups again, attach them to the DOM in correct order
groupIds.forEach(function (groupId) {
groups[groupId].show();
});
this.groupIds = groupIds;
}
return changed;
}
else {
return false;
}
};
/**
* Add a new item
* @param {Item} item
* @private
*/
ItemSet.prototype._addItem = function(item) {
this.items[item.id] = item;
// add to group
var groupId = this._getGroupId(item.data);
var group = this.groups[groupId];
if (group) group.add(item);
};
/**
* Update an existing item
* @param {Item} item
* @param {Object} itemData
* @private
*/
ItemSet.prototype._updateItem = function(item, itemData) {
var oldGroupId = item.data.group;
var oldSubGroupId = item.data.subgroup;
// update the items data (will redraw the item when displayed)
item.setData(itemData);
// update group
if (oldGroupId != item.data.group || oldSubGroupId != item.data.subgroup) {
var oldGroup = this.groups[oldGroupId];
if (oldGroup) oldGroup.remove(item);
var groupId = this._getGroupId(item.data);
var group = this.groups[groupId];
if (group) group.add(item);
}
};
/**
* Delete an item from the ItemSet: remove it from the DOM, from the map
* with items, and from the map with visible items, and from the selection
* @param {Item} item
* @private
*/
ItemSet.prototype._removeItem = function(item) {
// remove from DOM
item.hide();
// remove from items
delete this.items[item.id];
// remove from selection
var index = this.selection.indexOf(item.id);
if (index != -1) this.selection.splice(index, 1);
// remove from group
item.parent && item.parent.remove(item);
};
/**
* Create an array containing all items being a range (having an end date)
* @param array
* @returns {Array}
* @private
*/
ItemSet.prototype._constructByEndArray = function(array) {
var endArray = [];
for (var i = 0; i < array.length; i++) {
if (array[i] instanceof RangeItem) {
endArray.push(array[i]);
}
}
return endArray;
};
/**
* Register the clicked item on touch, before dragStart is initiated.
*
* dragStart is initiated from a mousemove event, AFTER the mouse/touch is
* already moving. Therefore, the mouse/touch can sometimes be above an other
* DOM element than the item itself.
*
* @param {Event} event
* @private
*/
ItemSet.prototype._onTouch = function (event) {
// store the touched item, used in _onDragStart
this.touchParams.item = this.itemFromTarget(event);
this.touchParams.dragLeftItem = event.target.dragLeftItem || false;
this.touchParams.dragRightItem = event.target.dragRightItem || false;
this.touchParams.itemProps = null;
};
/**
* Given an group id, returns the index it has.
*
* @param {Number} groupID
* @private
*/
ItemSet.prototype._getGroupIndex = function(groupId) {
for (var i = 0; i < this.groupIds.length; i++) {
if (groupId == this.groupIds[i])
return i;
}
};
/**
* Start dragging the selected events
* @param {Event} event
* @private
*/
ItemSet.prototype._onDragStart = function (event) {
if (this.touchParams.itemIsDragging) { return; }
var item = this.touchParams.item || null;
var me = this;
var props;
if (item && (item.selected || this.options.itemsAlwaysDraggable)) {
if (this.options.editable.overrideItems &&
!this.options.editable.updateTime &&
!this.options.editable.updateGroup) {
return;
}
// override options.editable
if ((item.editable != null && !item.editable.updateTime && !item.editable.updateGroup)
&& !this.options.editable.overrideItems) {
return;
}
var dragLeftItem = this.touchParams.dragLeftItem;
var dragRightItem = this.touchParams.dragRightItem;
this.touchParams.itemIsDragging = true;
if (dragLeftItem) {
props = {
item: dragLeftItem,
initialX: event.center.x,
dragLeft: true,
data: this._cloneItemData(item.data)
};
this.touchParams.itemProps = [props];
}
else if (dragRightItem) {
props = {
item: dragRightItem,
initialX: event.center.x,
dragRight: true,
data: this._cloneItemData(item.data)
};
this.touchParams.itemProps = [props];
}
else {
this.touchParams.selectedItem = item;
var baseGroupIndex = this._getGroupIndex(item.data.group);
var itemsToDrag = (this.options.itemsAlwaysDraggable && !item.selected) ? [item.id] : this.getSelection();
this.touchParams.itemProps = itemsToDrag.map(function (id) {
var item = me.items[id];
var groupIndex = me._getGroupIndex(item.data.group);
return {
item: item,
initialX: event.center.x,
groupOffset: baseGroupIndex-groupIndex,
data: this._cloneItemData(item.data)
};
}.bind(this));
}
event.stopPropagation();
}
else if (this.options.editable.add && (event.srcEvent.ctrlKey || event.srcEvent.metaKey)) {
// create a new range item when dragging with ctrl key down
this._onDragStartAddItem(event);
}
};
/**
* Start creating a new range item by dragging.
* @param {Event} event
* @private
*/
ItemSet.prototype._onDragStartAddItem = function (event) {
var snap = this.options.snap || null;
if (this.options.rtl) {
var xAbs = util.getAbsoluteRight(this.dom.frame);
var x = xAbs - event.center.x + 10; // plus 10 to compensate for the drag starting as soon as you've moved 10px
} else {
var xAbs = util.getAbsoluteLeft(this.dom.frame);
var x = event.center.x - xAbs - 10; // minus 10 to compensate for the drag starting as soon as you've moved 10px
}
var time = this.body.util.toTime(x);
var scale = this.body.util.getScale();
var step = this.body.util.getStep();
var start = snap ? snap(time, scale, step) : time;
var end = start;
var itemData = {
type: 'range',
start: start,
end: end,
content: 'new item'
};
var id = util.randomUUID();
itemData[this.itemsData._fieldId] = id;
var group = this.groupFromTarget(event);
if (group) {
itemData.group = group.groupId;
}
var newItem = new RangeItem(itemData, this.conversion, this.options);
newItem.id = id; // TODO: not so nice setting id afterwards
newItem.data = this._cloneItemData(itemData);
this._addItem(newItem);
var props = {
item: newItem,
initialX: event.center.x,
data: newItem.data
};
if (this.options.rtl) {
props.dragLeft = true;
} else {
props.dragRight = true;
}
this.touchParams.itemProps = [props];
event.stopPropagation();
};
/**
* Drag selected items
* @param {Event} event
* @private
*/
ItemSet.prototype._onDrag = function (event) {
if (this.touchParams.itemProps) {
event.stopPropagation();
var me = this;
var snap = this.options.snap || null;
if (this.options.rtl) {
var xOffset = this.body.dom.root.offsetLeft + this.body.domProps.right.width;
} else {
var xOffset = this.body.dom.root.offsetLeft + this.body.domProps.left.width;
}
var scale = this.body.util.getScale();
var step = this.body.util.getStep();
//only calculate the new group for the item that's actually dragged
var selectedItem = this.touchParams.selectedItem;
var updateGroupAllowed = ((this.options.editable.overrideItems || selectedItem.editable == null) && this.options.editable.updateGroup) ||
(!this.options.editable.overrideItems && selectedItem.editable != null && selectedItem.editable.updateGroup);
var newGroupBase = null;
if (updateGroupAllowed && selectedItem) {
if (selectedItem.data.group != undefined) {
// drag from one group to another
var group = me.groupFromTarget(event);
if (group) {
//we know the offset for all items, so the new group for all items
//will be relative to this one.
newGroupBase = this._getGroupIndex(group.groupId);
}
}
}
// move
this.touchParams.itemProps.forEach(function (props) {
var current = me.body.util.toTime(event.center.x - xOffset);
var initial = me.body.util.toTime(props.initialX - xOffset);
if (this.options.rtl) {
var offset = -(current - initial); // ms
} else {
var offset = (current - initial); // ms
}
var itemData = this._cloneItemData(props.item.data); // clone the data
if (props.item.editable != null
&& !props.item.editable.updateTime
&& !props.item.editable.updateGroup
&& !me.options.editable.overrideItems) {
return;
}
var updateTimeAllowed = ((this.options.editable.overrideItems || selectedItem.editable == null) && this.options.editable.updateTime) ||
(!this.options.editable.overrideItems && selectedItem.editable != null && selectedItem.editable.updateTime);
if (updateTimeAllowed) {
if (props.dragLeft) {
// drag left side of a range item
if (this.options.rtl) {
if (itemData.end != undefined) {
var initialEnd = util.convert(props.data.end, 'Date');
var end = new Date(initialEnd.valueOf() + offset);
// TODO: pass a Moment instead of a Date to snap(). (Breaking change)
itemData.end = snap ? snap(end, scale, step) : end;
}
} else {
if (itemData.start != undefined) {
var initialStart = util.convert(props.data.start, 'Date');
var start = new Date(initialStart.valueOf() + offset);
// TODO: pass a Moment instead of a Date to snap(). (Breaking change)
itemData.start = snap ? snap(start, scale, step) : start;
}
}
}
else if (props.dragRight) {
// drag right side of a range item
if (this.options.rtl) {
if (itemData.start != undefined) {
var initialStart = util.convert(props.data.start, 'Date');
var start = new Date(initialStart.valueOf() + offset);
// TODO: pass a Moment instead of a Date to snap(). (Breaking change)
itemData.start = snap ? snap(start, scale, step) : start;
}
} else {
if (itemData.end != undefined) {
var initialEnd = util.convert(props.data.end, 'Date');
var end = new Date(initialEnd.valueOf() + offset);
// TODO: pass a Moment instead of a Date to snap(). (Breaking change)
itemData.end = snap ? snap(end, scale, step) : end;
}
}
}
else {
// drag both start and end
if (itemData.start != undefined) {
var initialStart = util.convert(props.data.start, 'Date').valueOf();
var start = new Date(initialStart + offset);
if (itemData.end != undefined) {
var initialEnd = util.convert(props.data.end, 'Date');
var duration = initialEnd.valueOf() - initialStart.valueOf();
// TODO: pass a Moment instead of a Date to snap(). (Breaking change)
itemData.start = snap ? snap(start, scale, step) : start;
itemData.end = new Date(itemData.start.valueOf() + duration);
}
else {
// TODO: pass a Moment instead of a Date to snap(). (Breaking change)
itemData.start = snap ? snap(start, scale, step) : start;
}
}
}
}
if (updateGroupAllowed && (!props.dragLeft && !props.dragRight) && newGroupBase!=null) {
if (itemData.group != undefined) {
var newOffset = newGroupBase - props.groupOffset;
//make sure we stay in bounds
newOffset = Math.max(0, newOffset);
newOffset = Math.min(me.groupIds.length-1, newOffset);
itemData.group = me.groupIds[newOffset];
}
}
// confirm moving the item
itemData = this._cloneItemData(itemData); // convert start and end to the correct type
me.options.onMoving(itemData, function (itemData) {
if (itemData) {
props.item.setData(this._cloneItemData(itemData, 'Date'));
}
}.bind(this));
}.bind(this));
this.stackDirty = true; // force re-stacking of all items next redraw
this.body.emitter.emit('_change');
}
};
/**
* Move an item to another group
* @param {Item} item
* @param {String | Number} groupId
* @private
*/
ItemSet.prototype._moveToGroup = function(item, groupId) {
var group = this.groups[groupId];
if (group && group.groupId != item.data.group) {
var oldGroup = item.parent;
oldGroup.remove(item);
oldGroup.order();
group.add(item);
group.order();
item.data.group = group.groupId;
}
};
/**
* End of dragging selected items
* @param {Event} event
* @private
*/
ItemSet.prototype._onDragEnd = function (event) {
if (this.touchParams.itemProps) {
event.stopPropagation();
var me = this;
var dataset = this.itemsData.getDataSet();
var itemProps = this.touchParams.itemProps ;
this.touchParams.itemProps = null;
this.touchParams.itemIsDragging = false;
itemProps.forEach(function (props) {
var id = props.item.id;
var exists = me.itemsData.get(id, me.itemOptions) != null;
if (!exists) {
// add a new item
me.options.onAdd(props.item.data, function (itemData) {
me._removeItem(props.item); // remove temporary item
if (itemData) {
me.itemsData.getDataSet().add(itemData);
}
// force re-stacking of all items next redraw
me.stackDirty = true;
me.body.emitter.emit('_change');
});
}
else {
// update existing item
var itemData = this._cloneItemData(props.item.data); // convert start and end to the correct type
me.options.onMove(itemData, function (itemData) {
if (itemData) {
// apply changes
itemData[dataset._fieldId] = id; // ensure the item contains its id (can be undefined)
dataset.update(itemData);
}
else {
// restore original values
props.item.setData(props.data);
me.stackDirty = true; // force re-stacking of all items next redraw
me.body.emitter.emit('_change');
}
});
}
}.bind(this));
}
};
ItemSet.prototype._onGroupDragStart = function (event) {
if (this.options.groupEditable.order) {
this.groupTouchParams.group = this.groupFromTarget(event);
if (this.groupTouchParams.group) {
event.stopPropagation();
this.groupTouchParams.originalOrder = this.groupsData.getIds({
order: this.options.groupOrder
});
}
}
}
ItemSet.prototype._onGroupDrag = function (event) {
if (this.options.groupEditable.order && this.groupTouchParams.group) {
event.stopPropagation();
var groupsData = this.groupsData;
if (this.groupsData instanceof DataView) {
groupsData = this.groupsData.getDataSet()
}
// drag from one group to another
var group = this.groupFromTarget(event);
// try to avoid toggling when groups differ in height
if (group && group.height != this.groupTouchParams.group.height) {
var movingUp = (group.top < this.groupTouchParams.group.top);
var clientY = event.center ? event.center.y : event.clientY;
var targetGroupTop = util.getAbsoluteTop(group.dom.foreground);
var draggedGroupHeight = this.groupTouchParams.group.height;
if (movingUp) {
// skip swapping the groups when the dragged group is not below clientY afterwards
if (targetGroupTop + draggedGroupHeight < clientY) {
return;
}
} else {
var targetGroupHeight = group.height;
// skip swapping the groups when the dragged group is not below clientY afterwards
if (targetGroupTop + targetGroupHeight - draggedGroupHeight > clientY) {
return;
}
}
}
if (group && group != this.groupTouchParams.group) {
var targetGroup = groupsData.get(group.groupId);
var draggedGroup = groupsData.get(this.groupTouchParams.group.groupId);
// switch groups
if (draggedGroup && targetGroup) {
this.options.groupOrderSwap(draggedGroup, targetGroup, this.groupsData);
groupsData.update(draggedGroup);
groupsData.update(targetGroup);
}
// fetch current order of groups
var newOrder = groupsData.getIds({
order: this.options.groupOrder
});
// in case of changes since _onGroupDragStart
if (!util.equalArray(newOrder, this.groupTouchParams.originalOrder)) {
var origOrder = this.groupTouchParams.originalOrder;
var draggedId = this.groupTouchParams.group.groupId;
var numGroups = Math.min(origOrder.length, newOrder.length);
var curPos = 0;
var newOffset = 0;
var orgOffset = 0;
while (curPos < numGroups) {
// as long as the groups are where they should be step down along the groups order
while ((curPos+newOffset) < numGroups
&& (curPos+orgOffset) < numGroups
&& newOrder[curPos+newOffset] == origOrder[curPos+orgOffset]) {
curPos++;
}
// all ok
if (curPos+newOffset >= numGroups) {
break;
}
// not all ok
// if dragged group was move upwards everything below should have an offset
if (newOrder[curPos+newOffset] == draggedId) {
newOffset = 1;
continue;
}
// if dragged group was move downwards everything above should have an offset
else if (origOrder[curPos+orgOffset] == draggedId) {
orgOffset = 1;
continue;
}
// found a group (apart from dragged group) that has the wrong position -> switch with the
// group at the position where other one should be, fix index arrays and continue
else {
var slippedPosition = newOrder.indexOf(origOrder[curPos+orgOffset])
var switchGroup = groupsData.get(newOrder[curPos+newOffset]);
var shouldBeGroup = groupsData.get(origOrder[curPos+orgOffset]);
this.options.groupOrderSwap(switchGroup, shouldBeGroup, groupsData);
groupsData.update(switchGroup);
groupsData.update(shouldBeGroup);
var switchGroupId = newOrder[curPos+newOffset];
newOrder[curPos+newOffset] = origOrder[curPos+orgOffset];
newOrder[slippedPosition] = switchGroupId;
curPos++;
}
}
}
}
}
}
ItemSet.prototype._onGroupDragEnd = function (event) {
if (this.options.groupEditable.order && this.groupTouchParams.group) {
event.stopPropagation();
// update existing group
var me = this;
var id = me.groupTouchParams.group.groupId;
var dataset = me.groupsData.getDataSet();
var groupData = util.extend({}, dataset.get(id)); // clone the data
me.options.onMoveGroup(groupData, function (groupData) {
if (groupData) {
// apply changes
groupData[dataset._fieldId] = id; // ensure the group contains its id (can be undefined)
dataset.update(groupData);
}
else {
// fetch current order of groups
var newOrder = dataset.getIds({
order: me.options.groupOrder
});
// restore original order
if (!util.equalArray(newOrder, me.groupTouchParams.originalOrder)) {
var origOrder = me.groupTouchParams.originalOrder;
var numGroups = Math.min(origOrder.length, newOrder.length);
var curPos = 0;
while (curPos < numGroups) {
// as long as the groups are where they should be step down along the groups order
while (curPos < numGroups && newOrder[curPos] == origOrder[curPos]) {
curPos++;
}
// all ok
if (curPos >= numGroups) {
break;
}
// found a group that has the wrong position -> switch with the
// group at the position where other one should be, fix index arrays and continue
var slippedPosition = newOrder.indexOf(origOrder[curPos])
var switchGroup = dataset.get(newOrder[curPos]);
var shouldBeGroup = dataset.get(origOrder[curPos]);
me.options.groupOrderSwap(switchGroup, shouldBeGroup, dataset);
groupsData.update(switchGroup);
groupsData.update(shouldBeGroup);
var switchGroupId = newOrder[curPos];
newOrder[curPos] = origOrder[curPos];
newOrder[slippedPosition] = switchGroupId;
curPos++;
}
}
}
});
me.body.emitter.emit('groupDragged', { groupId: id });
}
}
/**
* Handle selecting/deselecting an item when tapping it
* @param {Event} event
* @private
*/
ItemSet.prototype._onSelectItem = function (event) {
if (!this.options.selectable) return;
var ctrlKey = event.srcEvent && (event.srcEvent.ctrlKey || event.srcEvent.metaKey);
var shiftKey = event.srcEvent && event.srcEvent.shiftKey;
if (ctrlKey || shiftKey) {
this._onMultiSelectItem(event);
return;
}
var oldSelection = this.getSelection();
var item = this.itemFromTarget(event);
var selection = item ? [item.id] : [];
this.setSelection(selection);
var newSelection = this.getSelection();
// emit a select event,
// except when old selection is empty and new selection is still empty
if (newSelection.length > 0 || oldSelection.length > 0) {
this.body.emitter.emit('select', {
items: newSelection,
event: util.elementsCensor(event)
});
}
};
/**
* Handle hovering an item
* @param {Event} event
* @private
*/
ItemSet.prototype._onMouseOver = function (event) {
var item = this.itemFromTarget(event);
if (!item) return;
this.body.emitter.emit('itemover', {
item: item.id,
event: util.elementsCensor(event)
});
};
ItemSet.prototype._onMouseOut = function (event) {
var item = this.itemFromTarget(event);
if (!item) return;
this.body.emitter.emit('itemout', {
item: item.id,
event: util.elementsCensor(event)
});
};
/**
* Handle updates of an item on double tap
* @param event
* @private
*/
ItemSet.prototype._onUpdateItem = function (item) {
if (!this.options.selectable) return;
if (!this.options.editable.add) return;
var me = this;
if (item) {
// execute async handler to update the item (or cancel it)
var itemData = me.itemsData.get(item.id); // get a clone of the data from the dataset
this.options.onUpdate(itemData, function (itemData) {
if (itemData) {
me.itemsData.getDataSet().update(itemData);
}
});
}
}
/**
* Handle creation of an item on double tap
* @param event
* @private
*/
ItemSet.prototype._onAddItem = function (event) {
if (!this.options.selectable) return;
if (!this.options.editable.add) return;
var me = this;
var snap = this.options.snap || null;
var item = this.itemFromTarget(event);
if (!item) {
// add item
if (this.options.rtl) {
var xAbs = util.getAbsoluteRight(this.dom.frame);
var x = xAbs - event.center.x;
} else {
var xAbs = util.getAbsoluteLeft(this.dom.frame);
var x = event.center.x - xAbs;
}
// var xAbs = util.getAbsoluteLeft(this.dom.frame);
// var x = event.center.x - xAbs;
var start = this.body.util.toTime(x);
var scale = this.body.util.getScale();
var step = this.body.util.getStep();
var newItemData = {
start: snap ? snap(start, scale, step) : start,
content: 'new item'
};
if (event.type == 'drop') {
var itemData = JSON.parse(event.dataTransfer.getData("text"))
newItemData.content = itemData.content; // content is required
newItemData.type = itemData.type || 'box';
newItemData[this.itemsData._fieldId] = itemData.id || util.randomUUID();
if (itemData.type == 'range' || (itemData.end && itemData.start)) {
if (!itemData.end) {
var end = this.body.util.toTime(x + this.props.width / 5);
newItemData.end = snap ? snap(end, scale, step) : end;
} else {
newItemData.end = itemData.end;
newItemData.start = itemData.start;
}
}
} else {
newItemData[this.itemsData._fieldId] = util.randomUUID();
// when default type is a range, add a default end date to the new item
if (this.options.type === 'range') {
var end = this.body.util.toTime(x + this.props.width / 5);
newItemData.end = snap ? snap(end, scale, step) : end;
}
}
var group = this.groupFromTarget(event);
if (group) {
newItemData.group = group.groupId;
}
// execute async handler to customize (or cancel) adding an item
newItemData = this._cloneItemData(newItemData); // convert start and end to the correct type
this.options.onAdd(newItemData, function (item) {
if (item) {
me.itemsData.getDataSet().add(item);
if (event.type == 'drop') {
me.setSelection([item.id]);
}
// TODO: need to trigger a redraw?
}
});
}
};
/**
* Handle selecting/deselecting multiple items when holding an item
* @param {Event} event
* @private
*/
ItemSet.prototype._onMultiSelectItem = function (event) {
if (!this.options.selectable) return;
var item = this.itemFromTarget(event);
if (item) {
// multi select items (if allowed)
var selection = this.options.multiselect
? this.getSelection() // take current selection
: []; // deselect current selection
var shiftKey = event.srcEvent && event.srcEvent.shiftKey || false;
if (shiftKey && this.options.multiselect) {
// select all items between the old selection and the tapped item
var itemGroup = this.itemsData.get(item.id).group;
// when filtering get the group of the last selected item
var lastSelectedGroup = undefined;
if (this.options.multiselectPerGroup) {
if (selection.length > 0) {
lastSelectedGroup = this.itemsData.get(selection[0]).group;
}
}
// determine the selection range
if (!this.options.multiselectPerGroup || lastSelectedGroup == undefined || lastSelectedGroup == itemGroup) {
selection.push(item.id);
}
var range = ItemSet._getItemRange(this.itemsData.get(selection, this.itemOptions));
if (!this.options.multiselectPerGroup || lastSelectedGroup == itemGroup) {
// select all items within the selection range
selection = [];
for (var id in this.items) {
if (this.items.hasOwnProperty(id)) {
var _item = this.items[id];
var start = _item.data.start;
var end = (_item.data.end !== undefined) ? _item.data.end : start;
if (start >= range.min &&
end <= range.max &&
(!this.options.multiselectPerGroup || lastSelectedGroup == this.itemsData.get(_item.id).group) &&
!(_item instanceof BackgroundItem)) {
selection.push(_item.id); // do not use id but item.id, id itself is stringified
}
}
}
}
}
else {
// add/remove this item from the current selection
var index = selection.indexOf(item.id);
if (index == -1) {
// item is not yet selected -> select it
selection.push(item.id);
}
else {
// item is already selected -> deselect it
selection.splice(index, 1);
}
}
this.setSelection(selection);
this.body.emitter.emit('select', {
items: this.getSelection(),
event: util.elementsCensor(event)
});
}
};
/**
* Calculate the time range of a list of items
* @param {Array.<Object>} itemsData
* @return {{min: Date, max: Date}} Returns the range of the provided items
* @private
*/
ItemSet._getItemRange = function(itemsData) {
var max = null;
var min = null;
itemsData.forEach(function (data) {
if (min == null || data.start < min) {
min = data.start;
}
if (data.end != undefined) {
if (max == null || data.end > max) {
max = data.end;
}
}
else {
if (max == null || data.start > max) {
max = data.start;
}
}
});
return {
min: min,
max: max
}
};
/**
* 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.prototype.itemFromTarget = function(event) {
var target = event.target;
while (target) {
if (target.hasOwnProperty('timeline-item')) {
return target['timeline-item'];
}
target = target.parentNode;
}
return null;
};
/**
* Find the Group from an event target:
* searches for the attribute 'timeline-group' in the event target's element tree
* @param {Event} event
* @return {Group | null} group
*/
ItemSet.prototype.groupFromTarget = function(event) {
var clientY = event.center ? event.center.y : event.clientY;
for (var i = 0; i < this.groupIds.length; i++) {
var groupId = this.groupIds[i];
var group = this.groups[groupId];
var foreground = group.dom.foreground;
var top = util.getAbsoluteTop(foreground);
if (clientY > top && clientY < top + foreground.offsetHeight) {
return group;
}
if (this.options.orientation.item === 'top') {
if (i === this.groupIds.length - 1 && clientY > top) {
return group;
}
}
else {
if (i === 0 && clientY < top + foreground.offset) {
return group;
}
}
}
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(event) {
var target = event.target;
while (target) {
if (target.hasOwnProperty('timeline-itemset')) {
return target['timeline-itemset'];
}
target = target.parentNode;
}
return null;
};
/**
* Clone the data of an item, and "normalize" it: convert the start and end date
* to the type (Date, Moment, ...) configured in the DataSet. If not configured,
* start and end are converted to Date.
* @param {Object} itemData, typically `item.data`
* @param {string} [type] Optional Date type. If not provided, the type from the DataSet is taken
* @return {Object} The cloned object
* @private
*/
ItemSet.prototype._cloneItemData = function (itemData, type) {
var clone = util.extend({}, itemData);
if (!type) {
// convert start and end date to the type (Date, Moment, ...) configured in the DataSet
type = this.itemsData.getDataSet()._options.type;
}
if (clone.start != undefined) {
clone.start = util.convert(clone.start, type && type.start || 'Date');
}
if (clone.end != undefined) {
clone.end = util.convert(clone.end , type && type.end || 'Date');
}
return clone;
};
module.exports = ItemSet;