var Hammer = require('../../../module/hammer'); var util = require('../../../util'); /** * @constructor Item * @param {Object} data Object containing (optional) parameters type, * start, end, content, group, className. * @param {{toScreen: function, toTime: function}} conversion * Conversion functions from time to screen and vice versa * @param {Object} options Configuration options * // TODO: describe available options */ function Item (data, conversion, options) { this.id = null; this.parent = null; this.data = data; this.dom = null; this.conversion = conversion || {}; this.options = options || {}; this.selected = false; this.displayed = false; this.dirty = true; this.top = null; this.left = null; this.width = null; this.height = null; } Item.prototype.stack = true; /** * Select current item */ Item.prototype.select = function() { this.selected = true; this.dirty = true; if (this.displayed) this.redraw(); }; /** * Unselect current item */ Item.prototype.unselect = function() { this.selected = false; this.dirty = true; if (this.displayed) this.redraw(); }; /** * Set data for the item. Existing data will be updated. The id should not * be changed. When the item is displayed, it will be redrawn immediately. * @param {Object} data */ Item.prototype.setData = function(data) { var groupChanged = data.group != undefined && this.data.group != data.group; if (groupChanged) { this.parent.itemSet._moveToGroup(this, data.group); } this.data = data; this.dirty = true; if (this.displayed) this.redraw(); }; /** * Set a parent for the item * @param {ItemSet | Group} parent */ Item.prototype.setParent = function(parent) { if (this.displayed) { this.hide(); this.parent = parent; if (this.parent) { this.show(); } } else { this.parent = parent; } }; /** * Check whether this item is visible inside given range * @returns {{start: Number, end: Number}} range with a timestamp for start and end * @returns {boolean} True if visible */ Item.prototype.isVisible = function(range) { // Should be implemented by Item implementations return false; }; /** * Show the Item in the DOM (when not already visible) * @return {Boolean} changed */ Item.prototype.show = function() { return false; }; /** * Hide the Item from the DOM (when visible) * @return {Boolean} changed */ Item.prototype.hide = function() { return false; }; /** * Repaint the item */ Item.prototype.redraw = function() { // should be implemented by the item }; /** * Reposition the Item horizontally */ Item.prototype.repositionX = function() { // should be implemented by the item }; /** * Reposition the Item vertically */ Item.prototype.repositionY = function() { // should be implemented by the item }; /** * Repaint a delete button on the top right of the item when the item is selected * @param {HTMLElement} anchor * @protected */ Item.prototype._repaintDeleteButton = function (anchor) { if (this.selected && this.options.editable.remove && !this.dom.deleteButton) { // create and show button var me = this; var deleteButton = document.createElement('div'); deleteButton.className = 'vis-delete'; deleteButton.title = 'Delete this item'; // TODO: be able to destroy the delete button new Hammer(deleteButton).on('tap', function (event) { event.stopPropagation(); me.parent.removeFromDataSet(me); }); anchor.appendChild(deleteButton); this.dom.deleteButton = deleteButton; } else if (!this.selected && this.dom.deleteButton) { // remove button if (this.dom.deleteButton.parentNode) { this.dom.deleteButton.parentNode.removeChild(this.dom.deleteButton); } this.dom.deleteButton = null; } }; /** * Set HTML contents for the item * @param {Element} element HTML element to fill with the contents * @private */ Item.prototype._updateContents = function (element) { var content; if (this.options.template) { var itemData = this.parent.itemSet.itemsData.get(this.id); // get a clone of the data from the dataset content = this.options.template(itemData); } else { content = this.data.content; } var changed = this._contentToString(this.content) !== this._contentToString(content); if (changed) { // only replace the content when changed if (content instanceof Element) { element.innerHTML = ''; element.appendChild(content); } else if (content != undefined) { element.innerHTML = content; } else { if (!(this.data.type == 'background' && this.data.content === undefined)) { throw new Error('Property "content" missing in item ' + this.id); } } this.content = content; } }; /** * Set HTML contents for the item * @param {Element} element HTML element to fill with the contents * @private */ Item.prototype._updateTitle = function (element) { if (this.data.title != null) { element.title = this.data.title || ''; } else { element.removeAttribute('vis-title'); } }; /** * Process dataAttributes timeline option and set as data- attributes on dom.content * @param {Element} element HTML element to which the attributes will be attached * @private */ Item.prototype._updateDataAttributes = function(element) { if (this.options.dataAttributes && this.options.dataAttributes.length > 0) { var attributes = []; if (Array.isArray(this.options.dataAttributes)) { attributes = this.options.dataAttributes; } else if (this.options.dataAttributes == 'all') { attributes = Object.keys(this.data); } else { return; } for (var i = 0; i < attributes.length; i++) { var name = attributes[i]; var value = this.data[name]; if (value != null) { element.setAttribute('data-' + name, value); } else { element.removeAttribute('data-' + name); } } } }; /** * Update custom styles of the element * @param element * @private */ Item.prototype._updateStyle = function(element) { // remove old styles if (this.style) { util.removeCssText(element, this.style); this.style = null; } // append new styles if (this.data.style) { util.addCssText(element, this.data.style); this.style = this.data.style; } }; /** * Stringify the items contents * @param {string | Element | undefined} content * @returns {string | undefined} * @private */ Item.prototype._contentToString = function (content) { if (typeof content === 'string') return content; if (content && 'outerHTML' in content) return content.outerHTML; return content; }; /** * Return the width of the item left from its start date * @return {number} */ Item.prototype.getWidthLeft = function () { return 0; }; /** * Return the width of the item right from the max of its start and end date * @return {number} */ Item.prototype.getWidthRight = function () { return 0; }; module.exports = Item;