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