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789 lines
22 KiB
789 lines
22 KiB
/**
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* An ItemSet holds a set of items and ranges which can be displayed in a
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* range. The width is determined by the parent of the ItemSet, and the height
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* is determined by the size of the items.
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* @param {Object} [options] See ItemSet.setOptions for the available
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* options.
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* @constructor ItemSet
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* @extends Panel
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*/
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// TODO: improve performance by replacing all Array.forEach with a for loop
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function ItemSet(options) {
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this.id = util.randomUUID();
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// one options object is shared by this itemset and all its items
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this.options = options || {};
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this.itemOptions = Object.create(this.options);
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this.dom = {};
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this.hammer = null;
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var me = this;
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this.itemsData = null; // DataSet
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this.range = null; // Range or Object {start: number, end: number}
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// data change listeners
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this.listeners = {
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'add': function (event, params, senderId) {
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if (senderId != me.id) me._onAdd(params.items);
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},
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'update': function (event, params, senderId) {
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if (senderId != me.id) me._onUpdate(params.items);
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},
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'remove': function (event, params, senderId) {
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if (senderId != me.id) me._onRemove(params.items);
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}
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};
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this.items = {}; // object with an Item for every data item
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this.orderedItems = {
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byStart: [],
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byEnd: []
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};
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this.visibleItems = []; // visible, ordered items
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this.visibleItemsStart = 0; // start index of visible items in this.orderedItems // TODO: cleanup
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this.visibleItemsEnd = 0; // start index of visible items in this.orderedItems // TODO: cleanup
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this.selection = []; // list with the ids of all selected nodes
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this.queue = {}; // queue with id/actions: 'add', 'update', 'delete'
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this.stack = new Stack(Object.create(this.options));
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this.stackDirty = true; // If true, on the next repaint the cached stacking is cleared and stacking is redone
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this.conversion = null;
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this.touchParams = {}; // stores properties while dragging
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// TODO: ItemSet should also attach event listeners for rangechange and rangechanged, like timeaxis
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}
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ItemSet.prototype = new Panel();
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// available item types will be registered here
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ItemSet.types = {
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box: ItemBox,
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range: ItemRange,
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rangeoverflow: ItemRangeOverflow,
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point: ItemPoint
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};
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/**
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* Set options for the ItemSet. Existing options will be extended/overwritten.
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* @param {Object} [options] The following options are available:
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* {String | function} [className]
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* class name for the itemset
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* {String} [type]
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* Default type for the items. Choose from 'box'
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* (default), 'point', or 'range'. The default
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* Style can be overwritten by individual items.
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* {String} align
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* Alignment for the items, only applicable for
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* ItemBox. Choose 'center' (default), 'left', or
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* 'right'.
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* {String} orientation
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* Orientation of the item set. Choose 'top' or
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* 'bottom' (default).
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* {Number} margin.axis
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* Margin between the axis and the items in pixels.
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* Default is 20.
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* {Number} margin.item
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* Margin between items in pixels. Default is 10.
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* {Number} padding
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* Padding of the contents of an item in pixels.
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* Must correspond with the items css. Default is 5.
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* {Function} snap
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* Function to let items snap to nice dates when
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* dragging items.
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*/
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ItemSet.prototype.setOptions = Component.prototype.setOptions;
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/**
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* Set range (start and end).
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* @param {Range | Object} range A Range or an object containing start and end.
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*/
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ItemSet.prototype.setRange = function setRange(range) {
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if (!(range instanceof Range) && (!range || !range.start || !range.end)) {
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throw new TypeError('Range must be an instance of Range, ' +
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'or an object containing start and end.');
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}
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this.range = range;
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};
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/**
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* Set selected items by their id. Replaces the current selection
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* Unknown id's are silently ignored.
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* @param {Array} [ids] An array with zero or more id's of the items to be
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* selected. If ids is an empty array, all items will be
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* unselected.
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*/
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ItemSet.prototype.setSelection = function setSelection(ids) {
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var i, ii, id, item;
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if (ids) {
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if (!Array.isArray(ids)) {
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throw new TypeError('Array expected');
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}
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// unselect currently selected items
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for (i = 0, ii = this.selection.length; i < ii; i++) {
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id = this.selection[i];
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item = this.items[id];
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if (item) item.unselect();
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}
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// select items
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this.selection = [];
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for (i = 0, ii = ids.length; i < ii; i++) {
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id = ids[i];
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item = this.items[id];
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if (item) {
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this.selection.push(id);
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item.select();
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}
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}
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}
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};
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/**
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* Get the selected items by their id
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* @return {Array} ids The ids of the selected items
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*/
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ItemSet.prototype.getSelection = function getSelection() {
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return this.selection.concat([]);
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};
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/**
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* Deselect a selected item
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* @param {String | Number} id
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* @private
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*/
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ItemSet.prototype._deselect = function _deselect(id) {
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var selection = this.selection;
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for (var i = 0, ii = selection.length; i < ii; i++) {
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if (selection[i] == id) { // non-strict comparison!
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selection.splice(i, 1);
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break;
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}
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}
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};
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/**
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* Repaint the component
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*/
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ItemSet.prototype.repaint = function repaint() {
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var asSize = util.option.asSize,
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asString = util.option.asString,
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options = this.options,
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orientation = this.getOption('orientation'),
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frame = this.frame;
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this._updateConversion();
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if (!frame) {
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frame = document.createElement('div');
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frame['timeline-itemset'] = this;
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this.frame = frame;
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// create background panel
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var background = document.createElement('div');
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background.className = 'background';
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frame.appendChild(background);
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this.dom.background = background;
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// create foreground panel
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var foreground = document.createElement('div');
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foreground.className = 'foreground';
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frame.appendChild(foreground);
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this.dom.foreground = foreground;
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// create axis panel
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var axis = document.createElement('div');
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axis.className = 'axis';
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this.dom.axis = axis;
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frame.appendChild(axis);
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// attach event listeners
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// TODO: use event listeners from the rootpanel to improve performance
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this.hammer = Hammer(frame, {
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prevent_default: true
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});
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this.hammer.on('dragstart', this._onDragStart.bind(this));
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this.hammer.on('drag', this._onDrag.bind(this));
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this.hammer.on('dragend', this._onDragEnd.bind(this));
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}
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if (!frame.parentNode) {
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if (!this.parent) throw new Error('Cannot repaint itemset: no parent attached');
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var parentContainer = this.parent.getContainer();
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if (!parentContainer) throw new Error('Cannot repaint itemset: parent has no container element');
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parentContainer.appendChild(frame);
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}
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// update className
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frame.className = 'itemset' + (options.className ? (' ' + asString(options.className)) : '');
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// check whether zoomed (in that case we need to re-stack everything)
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var visibleInterval = this.range.end - this.range.start;
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var zoomed = (this.visibleInterval != visibleInterval);
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this.visibleInterval = visibleInterval;
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this.stackDirty = this.stackDirty || zoomed;
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/* TODO: implement+fix smarter way to update visible items
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// find the first visible item
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// TODO: use faster search, not linear
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var byEnd = this.orderedItems.byEnd;
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var start = 0;
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var item = null;
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while ((item = byEnd[start]) &&
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(('end' in item.data) ? item.data.end : item.data.start) < this.range.start) {
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start++;
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}
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// find the last visible item
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// TODO: use faster search, not linear
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var byStart = this.orderedItems.byStart;
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var end = 0;
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while ((item = byStart[end]) && item.data.start < this.range.end) {
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end++;
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}
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console.log('visible items', start, end); // TODO: cleanup
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console.log('visible item ids', byStart[start] && byStart[start].id, byEnd[end-1] && byEnd[end-1].id); // TODO: cleanup
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this.visibleItems = [];
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var i = start;
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item = byStart[i];
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var lastItem = byEnd[end];
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while (item && item !== lastItem) {
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this.visibleItems.push(item);
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item = byStart[++i];
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}
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this.stack.order(this.visibleItems);
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// show visible items
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for (var i = 0, ii = this.visibleItems.length; i < ii; i++) {
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item = this.visibleItems[i];
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if (!item.displayed) item.show();
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item.top = null; // reset stacking position
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// reposition item horizontally
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item.repositionX();
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}
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*/
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// simple, brute force calculation of visible items
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// TODO: replace with a faster, more sophisticated solution
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this.visibleItems = [];
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for (var id in this.items) {
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if (this.items.hasOwnProperty(id)) {
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var item = this.items[id];
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if (item.isVisible(this.range)) {
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if (!item.displayed) item.show();
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// reset stacking position
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if (this.stackDirty) item.top = null;
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// reposition item horizontally
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item.repositionX();
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this.visibleItems.push(item);
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}
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else {
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if (item.displayed) item.hide();
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}
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}
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}
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// reposition visible items vertically
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//this.stack.order(this.visibleItems); // TODO: solve ordering issue
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this.stack.stack(this.visibleItems);
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for (var i = 0, ii = this.visibleItems.length; i < ii; i++) {
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this.visibleItems[i].repositionY();
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}
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// recalculate the height of the itemset
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var marginAxis = (options.margin && 'axis' in options.margin) ? options.margin.axis : this.itemOptions.margin.axis,
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marginItem = (options.margin && 'item' in options.margin) ? options.margin.item : this.itemOptions.margin.item,
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height;
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// determine the height from the stacked items
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var visibleItems = this.visibleItems;
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if (visibleItems.length) {
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var min = visibleItems[0].top;
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var max = visibleItems[0].top + visibleItems[0].height;
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util.forEach(visibleItems, function (item) {
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min = Math.min(min, item.top);
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max = Math.max(max, (item.top + item.height));
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});
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height = (max - min) + marginAxis + marginItem;
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}
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else {
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height = marginAxis + marginItem;
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}
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// reposition frame
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frame.style.left = asSize(options.left, '');
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frame.style.right = asSize(options.right, '');
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frame.style.top = asSize((orientation == 'top') ? '0' : '');
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frame.style.bottom = asSize((orientation == 'top') ? '' : '0');
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frame.style.width = asSize(options.width, '100%');
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frame.style.height = asSize(height);
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// calculate actual size and position
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this.top = frame.offsetTop;
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this.left = frame.offsetLeft;
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this.width = frame.offsetWidth;
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this.height = height;
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// reposition axis
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this.dom.axis.style.left = asSize(options.left, '0');
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this.dom.axis.style.right = asSize(options.right, '');
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this.dom.axis.style.width = asSize(options.width, '100%');
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this.dom.axis.style.height = asSize(0);
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this.dom.axis.style.top = (orientation == 'top') ? '0' : '';
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this.dom.axis.style.bottom = (orientation == 'top') ? '' : '0';
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return false;
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};
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/**
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* Get the foreground container element
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* @return {HTMLElement} foreground
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*/
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ItemSet.prototype.getForeground = function getForeground() {
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return this.dom.foreground;
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};
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/**
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* Get the background container element
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* @return {HTMLElement} background
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*/
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ItemSet.prototype.getBackground = function getBackground() {
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return this.dom.background;
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};
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/**
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* Get the axis container element
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* @return {HTMLElement} axis
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*/
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ItemSet.prototype.getAxis = function getAxis() {
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return this.dom.axis;
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};
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/**
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* Hide this component from the DOM
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*/
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ItemSet.prototype.hide = function hide() {
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// remove the DOM
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if (this.frame && this.frame.parentNode) {
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this.frame.parentNode.removeChild(this.frame);
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}
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/* TODO: cleanup
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if (this.dom.axis && this.dom.axis.parentNode) {
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this.dom.axis.parentNode.removeChild(this.dom.axis);
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}
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*/
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};
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/**
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* Set items
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* @param {vis.DataSet | null} items
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*/
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ItemSet.prototype.setItems = function setItems(items) {
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var me = this,
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ids,
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oldItemsData = this.itemsData;
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// replace the dataset
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if (!items) {
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this.itemsData = null;
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}
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else if (items instanceof DataSet || items instanceof DataView) {
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this.itemsData = items;
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}
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else {
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throw new TypeError('Data must be an instance of DataSet');
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}
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if (oldItemsData) {
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// unsubscribe from old dataset
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util.forEach(this.listeners, function (callback, event) {
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oldItemsData.unsubscribe(event, callback);
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});
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// remove all drawn items
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ids = oldItemsData.getIds();
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this._onRemove(ids);
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}
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if (this.itemsData) {
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// subscribe to new dataset
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var id = this.id;
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util.forEach(this.listeners, function (callback, event) {
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me.itemsData.on(event, callback, id);
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});
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// draw all new items
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ids = this.itemsData.getIds();
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this._onAdd(ids);
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}
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};
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/**
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* Get the current items items
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* @returns {vis.DataSet | null}
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*/
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ItemSet.prototype.getItems = function getItems() {
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return this.itemsData;
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};
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/**
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* Remove an item by its id
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* @param {String | Number} id
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*/
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ItemSet.prototype.removeItem = function removeItem (id) {
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var item = this.itemsData.get(id),
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dataset = this._myDataSet();
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if (item) {
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// confirm deletion
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this.options.onRemove(item, function (item) {
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if (item) {
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dataset.remove(item);
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}
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});
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}
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};
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/**
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* Handle updated items
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* @param {Number[]} ids
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* @private
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*/
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ItemSet.prototype._onUpdate = function _onUpdate(ids) {
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var me = this,
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items = this.items,
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itemOptions = this.itemOptions;
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ids.forEach(function (id) {
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var itemData = me.itemsData.get(id),
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item = items[id],
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type = itemData.type ||
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(itemData.start && itemData.end && 'range') ||
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options.type ||
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'box';
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var constructor = ItemSet.types[type];
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// TODO: how to handle items with invalid data? hide them and give a warning? or throw an error?
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if (item) {
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// update item
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if (!constructor || !(item instanceof constructor)) {
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// item type has changed, hide and delete the item
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if (!('hide' in item)) {
|
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console.log('item has no hide?!', item, Object.keys(items))
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console.trace()
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}
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item.hide();
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item = null;
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}
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else {
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item.data = itemData; // TODO: create a method item.setData ?
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}
|
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}
|
|
|
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if (!item) {
|
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// create item
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|
if (constructor) {
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item = new constructor(me, itemData, options, itemOptions);
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item.id = id;
|
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}
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else {
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throw new TypeError('Unknown item type "' + type + '"');
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}
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}
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me.items[id] = item;
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});
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this._order();
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this.repaint();
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};
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|
|
/**
|
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* Handle added items
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* @param {Number[]} ids
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* @private
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*/
|
|
ItemSet.prototype._onAdd = ItemSet.prototype._onUpdate;
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|
|
/**
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* Handle removed items
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* @param {Number[]} ids
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* @private
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*/
|
|
ItemSet.prototype._onRemove = function _onRemove(ids) {
|
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var me = this;
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ids.forEach(function (id) {
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var item = me.items[id];
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if (item) {
|
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item.hide(); // TODO: only hide when displayed
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delete me.items[id];
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delete me.visibleItems[id];
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}
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});
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this._order();
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};
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|
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/**
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* Order the items
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|
* @private
|
|
*/
|
|
ItemSet.prototype._order = function _order() {
|
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var array = util.toArray(this.items);
|
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this.orderedItems.byStart = array;
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this.orderedItems.byEnd = [].concat(array);
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|
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// reorder the items
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this.stack.orderByStart(this.orderedItems.byStart);
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this.stack.orderByEnd(this.orderedItems.byEnd);
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|
|
// TODO: cleanup
|
|
//console.log('byStart', this.orderedItems.byStart.map(function (item) {return item.id}))
|
|
//console.log('byEnd', this.orderedItems.byEnd.map(function (item) {return item.id}))
|
|
}
|
|
|
|
/**
|
|
* 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) {
|
|
if (!this.options.editable) {
|
|
return;
|
|
}
|
|
|
|
var item = ItemSet.itemFromTarget(event),
|
|
me = this;
|
|
|
|
if (item && item.selected) {
|
|
var dragLeftItem = event.target.dragLeftItem;
|
|
var dragRightItem = event.target.dragRightItem;
|
|
|
|
if (dragLeftItem) {
|
|
this.touchParams.itemProps = [{
|
|
item: dragLeftItem,
|
|
start: item.data.start.valueOf()
|
|
}];
|
|
}
|
|
else if (dragRightItem) {
|
|
this.touchParams.itemProps = [{
|
|
item: dragRightItem,
|
|
end: item.data.end.valueOf()
|
|
}];
|
|
}
|
|
else {
|
|
this.touchParams.itemProps = this.getSelection().map(function (id) {
|
|
var item = me.items[id];
|
|
var props = {
|
|
item: item
|
|
};
|
|
|
|
if ('start' in item.data) {
|
|
props.start = item.data.start.valueOf()
|
|
}
|
|
if ('end' in item.data) {
|
|
props.end = item.data.end.valueOf()
|
|
}
|
|
|
|
return props;
|
|
});
|
|
}
|
|
|
|
event.stopPropagation();
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Drag selected items
|
|
* @param {Event} event
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._onDrag = function (event) {
|
|
if (this.touchParams.itemProps) {
|
|
var snap = this.options.snap || null,
|
|
deltaX = event.gesture.deltaX,
|
|
offset = deltaX / this.conversion.scale;
|
|
|
|
// move
|
|
this.touchParams.itemProps.forEach(function (props) {
|
|
if ('start' in props) {
|
|
var start = new Date(props.start + offset);
|
|
props.item.data.start = snap ? snap(start) : start;
|
|
}
|
|
if ('end' in props) {
|
|
var end = new Date(props.end + offset);
|
|
props.item.data.end = snap ? snap(end) : end;
|
|
}
|
|
});
|
|
|
|
// TODO: implement onMoving handler
|
|
|
|
// TODO: implement dragging from one group to another
|
|
|
|
this.stackDirty = true;
|
|
this.repaint(); // TODO: must repaint the rootPanel instead
|
|
|
|
event.stopPropagation();
|
|
}
|
|
};
|
|
|
|
/**
|
|
* End of dragging selected items
|
|
* @param {Event} event
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._onDragEnd = function (event) {
|
|
if (this.touchParams.itemProps) {
|
|
// prepare a change set for the changed items
|
|
var changes = [],
|
|
me = this,
|
|
dataset = this._myDataSet();
|
|
|
|
this.touchParams.itemProps.forEach(function (props) {
|
|
var id = props.item.id,
|
|
item = me.itemsData.get(id);
|
|
|
|
var changed = false;
|
|
if ('start' in props.item.data) {
|
|
changed = (props.start != props.item.data.start.valueOf());
|
|
item.start = util.convert(props.item.data.start, dataset.convert['start']);
|
|
}
|
|
if ('end' in props.item.data) {
|
|
changed = changed || (props.end != props.item.data.end.valueOf());
|
|
item.end = util.convert(props.item.data.end, dataset.convert['end']);
|
|
}
|
|
|
|
// only apply changes when start or end is actually changed
|
|
if (changed) {
|
|
me.options.onMove(item, function (item) {
|
|
if (item) {
|
|
// apply changes
|
|
changes.push(item);
|
|
}
|
|
else {
|
|
// restore original values
|
|
if ('start' in props) props.item.data.start = props.start;
|
|
if ('end' in props) props.item.data.end = props.end;
|
|
me.stackDirty = true;
|
|
me.repaint();
|
|
}
|
|
});
|
|
}
|
|
});
|
|
this.touchParams.itemProps = null;
|
|
|
|
// apply the changes to the data (if there are changes)
|
|
if (changes.length) {
|
|
dataset.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;
|
|
};
|
|
|
|
/**
|
|
* Find the DataSet to which this ItemSet is connected
|
|
* @returns {null | DataSet} dataset
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._myDataSet = function _myDataSet() {
|
|
// find the root DataSet
|
|
var dataset = this.itemsData;
|
|
while (dataset instanceof DataView) {
|
|
dataset = dataset.data;
|
|
}
|
|
return dataset;
|
|
};
|