forked from almende/vis
/
ItemSet.js
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/
ItemSet.js
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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
},
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_HORIZONTAL});
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;
}
else if (typeof options.editable === 'object') {
util.selectiveExtend(['updateTime', 'updateGroup', 'add', 'remove'], 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';
}
// 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) {