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420 lines
11 KiB
420 lines
11 KiB
/**
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* An GroupSet holds a set of groups
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* @param {Component} parent
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* @param {Component[]} [depends] Components on which this components depends
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* (except for the parent)
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* @param {Object} [options] See GroupSet.setOptions for the available
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* options.
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* @constructor GroupSet
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* @extends Panel
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*/
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function GroupSet(parent, depends, options) {
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this.id = util.randomUUID();
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this.parent = parent;
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this.depends = depends;
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this.options = {};
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this.range = null; // Range or Object {start: number, end: number}
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this.items = null; // dataset with items
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this.groups = null; // dataset with groups
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this.contents = []; // array with groups
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// changes in groups are queued key/value map containing id/action
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this.queue = {};
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var me = this;
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this.listeners = {
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'add': function (event, params) {
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me._onAdd(params.items);
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},
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'update': function (event, params) {
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me._onUpdate(params.items);
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},
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'remove': function (event, params) {
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me._onRemove(params.items);
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}
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};
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if (options) {
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this.setOptions(options);
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}
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}
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GroupSet.prototype = new Panel();
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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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* TODO: describe options
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*/
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GroupSet.prototype.setOptions = function setOptions(options) {
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util.extend(this.options, options);
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// TODO: implement options
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var me = this;
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util.forEach(this.contents, function (group) {
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group.itemset.setOptions(me.options);
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});
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};
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GroupSet.prototype.setRange = function (range) {
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// TODO: implement setRange
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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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GroupSet.prototype.setItems = function setItems(items) {
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this.items = items;
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util.forEach(this.contents, function (group) {
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group.itemset.setItems(items);
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});
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};
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/**
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* Get items
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* @return {vis.DataSet | null} items
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*/
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GroupSet.prototype.getItems = function getItems() {
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return this.items;
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};
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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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GroupSet.prototype.setRange = function setRange(range) {
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this.range = range;
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};
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/**
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* Set groups
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* @param {vis.DataSet} groups
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*/
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GroupSet.prototype.setGroups = function setGroups(groups) {
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var me = this,
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dataGroups,
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ids;
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// unsubscribe from current dataset
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if (this.groups) {
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util.forEach(this.listeners, function (callback, event) {
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me.groups.unsubscribe(event, callback);
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});
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// remove all drawn groups
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dataGroups = this.groups.get({fields: ['id']});
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ids = [];
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util.forEach(dataGroups, function (dataGroup, index) {
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ids[index] = dataGroup.id;
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});
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this._onRemove(ids);
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}
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// replace the dataset
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if (!groups) {
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this.groups = null;
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}
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else if (groups instanceof DataSet) {
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this.groups = groups;
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}
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else {
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this.groups = new DataSet({
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fieldTypes: {
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start: 'Date',
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end: 'Date'
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}
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});
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this.groups.add(groups);
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}
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if (this.groups) {
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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.groups.subscribe(event, callback, id);
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});
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// draw all new groups
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dataGroups = this.groups.get({fields: ['id']});
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ids = [];
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util.forEach(dataGroups, function (dataGroup, index) {
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ids[index] = dataGroup.id;
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});
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this._onAdd(ids);
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}
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};
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/**
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* Get groups
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* @return {vis.DataSet | null} groups
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*/
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GroupSet.prototype.getGroups = function getGroups() {
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return this.groups;
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};
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/**
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* Repaint the component
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* @return {Boolean} changed
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*/
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GroupSet.prototype.repaint = function repaint() {
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var changed = 0,
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update = util.updateProperty,
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asSize = util.option.asSize,
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options = this.options,
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frame = this.frame;
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if (!frame) {
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frame = document.createElement('div');
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frame.className = 'groupset';
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if (options.className) {
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util.addClassName(frame, util.option.asString(options.className));
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}
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this.frame = frame;
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changed += 1;
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}
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if (!this.parent) {
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throw new Error('Cannot repaint groupset: no parent attached');
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}
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var parentContainer = this.parent.getContainer();
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if (!parentContainer) {
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throw new Error('Cannot repaint groupset: parent has no container element');
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}
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if (!frame.parentNode) {
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parentContainer.appendChild(frame);
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changed += 1;
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}
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// reposition frame
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changed += update(frame.style, 'height', asSize(options.height, this.height + 'px'));
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changed += update(frame.style, 'top', asSize(options.top, '0px'));
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changed += update(frame.style, 'left', asSize(options.left, '0px'));
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changed += update(frame.style, 'width', asSize(options.width, '100%'));
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var me = this,
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queue = this.queue,
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items = this.items,
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contents = this.contents,
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groups = this.groups,
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dataOptions = {
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fields: ['id', 'content']
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};
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// show/hide added/changed/removed items
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var ids = Object.keys(queue);
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if (ids.length) {
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ids.forEach(function (id) {
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var action = queue[id];
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// find group
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var group = null;
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var groupIndex = -1;
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for (var i = 0; i < contents.length; i++) {
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if (contents[i].id == id) {
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group = contents[i];
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groupIndex = i;
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break;
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}
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}
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//noinspection FallthroughInSwitchStatementJS
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switch (action) {
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case 'add':
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case 'update':
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// group does not yet exist
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if (!group) {
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var itemset = new ItemSet(me);
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itemset.setOptions(util.extend({
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top: function () {
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return 0; // TODO
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}
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}, me.options));
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itemset.setRange(me.range);
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itemset.setItems(me.items);
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me.controller.add(itemset);
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group = {
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id: id,
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data: groups.get(id),
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itemset: itemset
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};
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contents.push(group);
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}
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delete queue[id];
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break;
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case 'remove':
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if (group) {
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// remove DOM of the group
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changed += group.itemset.hide();
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group.itemset.setItems();
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me.controller.remove(group.itemset);
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// remove group itself
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contents.splice(groupIndex, 1);
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}
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// update lists
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delete queue[id];
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break;
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default:
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console.log('Error: unknown action "' + action + '"');
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}
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});
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// update the top position (TODO: optimize, needed only when groups are added/removed/reordered
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var prevGroup = null;
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util.forEach(this.contents, function (group) {
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var prevItemset = prevGroup && prevGroup.itemset;
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if (prevItemset) {
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group.itemset.options.top = function () {
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return prevItemset.top + prevItemset.height;
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}
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}
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else {
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group.itemset.options.top = 0;
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}
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prevGroup = group;
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});
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}
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// reposition all groups
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util.forEach(this.contents, function (group) {
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changed += group.itemset.repaint();
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});
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return (changed > 0);
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};
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/**
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* Get container element
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* @return {HTMLElement} container
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*/
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GroupSet.prototype.getContainer = function getContainer() {
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// TODO: replace later on with container element for holding itemsets
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return this.frame;
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};
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/**
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* Reflow the component
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* @return {Boolean} resized
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*/
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GroupSet.prototype.reflow = function reflow() {
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var changed = 0,
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options = this.options,
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update = util.updateProperty,
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asNumber = util.option.asNumber,
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frame = this.frame;
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if (frame) {
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// reposition all groups
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util.forEach(this.contents, function (group) {
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changed += group.itemset.reflow();
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});
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var maxHeight = asNumber(options.maxHeight);
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var height;
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if (options.height != null) {
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height = frame.offsetHeight;
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}
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else {
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// height is not specified, calculate the sum of the height of all groups
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height = 0;
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util.forEach(this.contents, function (group) {
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height += group.itemset.height;
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});
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}
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if (maxHeight != null) {
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height = Math.min(height, maxHeight);
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}
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changed += update(this, 'height', height);
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changed += update(this, 'top', frame.offsetTop);
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changed += update(this, 'left', frame.offsetLeft);
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changed += update(this, 'width', frame.offsetWidth);
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}
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return (changed > 0);
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};
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/**
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* Hide the component from the DOM
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* @return {Boolean} changed
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*/
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GroupSet.prototype.hide = function hide() {
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if (this.frame && this.frame.parentNode) {
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this.frame.parentNode.removeChild(this.frame);
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return true;
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}
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else {
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return false;
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}
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};
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/**
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* Show the component in the DOM (when not already visible).
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* A repaint will be executed when the component is not visible
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* @return {Boolean} changed
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*/
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GroupSet.prototype.show = function show() {
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if (!this.frame || !this.frame.parentNode) {
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return this.repaint();
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}
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else {
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return false;
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}
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};
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/**
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* Handle updated groups
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* @param {Number[]} ids
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* @private
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*/
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GroupSet.prototype._onUpdate = function _onUpdate(ids) {
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this._toQueue(ids, 'update');
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};
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/**
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* Handle changed groups
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* @param {Number[]} ids
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* @private
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*/
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GroupSet.prototype._onAdd = function _onAdd(ids) {
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this._toQueue(ids, 'add');
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};
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/**
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* Handle removed groups
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* @param {Number[]} ids
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* @private
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*/
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GroupSet.prototype._onRemove = function _onRemove(ids) {
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this._toQueue(ids, 'remove');
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};
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/**
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* Put groups in the queue to be added/updated/remove
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* @param {Number[]} ids
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* @param {String} action can be 'add', 'update', 'remove'
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*/
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GroupSet.prototype._toQueue = function _toQueue(ids, action) {
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var queue = this.queue;
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ids.forEach(function (id) {
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queue[id] = action;
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});
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if (this.controller) {
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//this.requestReflow();
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this.requestRepaint();
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}
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};
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