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180 lines
4.8 KiB
180 lines
4.8 KiB
var Item = require('./Item');
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/**
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* @constructor PointItem
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* @extends Item
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* @param {Object} data Object containing parameters start
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* content, 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 PointItem (data, conversion, options) {
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this.props = {
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dot: {
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top: 0,
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width: 0,
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height: 0
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},
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content: {
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height: 0,
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marginLeft: 0
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}
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};
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// validate data
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if (data) {
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if (data.start == undefined) {
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throw new Error('Property "start" missing in item ' + data);
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}
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}
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Item.call(this, data, conversion, options);
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}
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PointItem.prototype = new Item (null, null, null);
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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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PointItem.prototype.isVisible = function(range) {
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// determine visibility
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// TODO: account for the real width of the item. Right now we just add 1/4 to the window
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var interval = (range.end - range.start) / 4;
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return (this.data.start > range.start - interval) && (this.data.start < range.end + interval);
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};
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/**
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* Repaint the item
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*/
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PointItem.prototype.redraw = function() {
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var dom = this.dom;
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if (!dom) {
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// create DOM
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this.dom = {};
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dom = this.dom;
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// background box
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dom.point = document.createElement('div');
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// className is updated in redraw()
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// contents box, right from the dot
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dom.content = document.createElement('div');
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dom.content.className = 'vis-item-content';
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dom.point.appendChild(dom.content);
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// dot at start
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dom.dot = document.createElement('div');
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dom.point.appendChild(dom.dot);
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// attach this item as attribute
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dom.point['timeline-item'] = this;
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this.dirty = true;
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}
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// append DOM to parent DOM
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if (!this.parent) {
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throw new Error('Cannot redraw item: no parent attached');
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}
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if (!dom.point.parentNode) {
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var foreground = this.parent.dom.foreground;
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if (!foreground) {
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throw new Error('Cannot redraw item: parent has no foreground container element');
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}
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foreground.appendChild(dom.point);
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}
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this.displayed = true;
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// Update DOM when item is marked dirty. An item is marked dirty when:
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// - the item is not yet rendered
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// - the item's data is changed
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// - the item is selected/deselected
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if (this.dirty) {
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this._updateContents(this.dom.content);
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this._updateTitle(this.dom.point);
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this._updateDataAttributes(this.dom.point);
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this._updateStyle(this.dom.point);
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// update class
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var className = (this.data.className ? ' ' + this.data.className : '') +
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(this.selected ? ' vis-selected' : '');
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dom.point.className = 'vis-item vis-point' + className;
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dom.dot.className = 'vis-item vis-dot' + className;
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// recalculate size
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this.width = dom.point.offsetWidth;
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this.height = dom.point.offsetHeight;
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this.props.dot.width = dom.dot.offsetWidth;
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this.props.dot.height = dom.dot.offsetHeight;
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this.props.content.height = dom.content.offsetHeight;
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// resize contents
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dom.content.style.marginLeft = 2 * this.props.dot.width + 'px';
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//dom.content.style.marginRight = ... + 'px'; // TODO: margin right
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dom.dot.style.top = ((this.height - this.props.dot.height) / 2) + 'px';
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dom.dot.style.left = (this.props.dot.width / 2) + 'px';
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this.dirty = false;
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}
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this._repaintDeleteButton(dom.point);
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};
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/**
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* Show the item in the DOM (when not already visible). The items DOM will
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* be created when needed.
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*/
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PointItem.prototype.show = function() {
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if (!this.displayed) {
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this.redraw();
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}
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};
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/**
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* Hide the item from the DOM (when visible)
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*/
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PointItem.prototype.hide = function() {
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if (this.displayed) {
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if (this.dom.point.parentNode) {
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this.dom.point.parentNode.removeChild(this.dom.point);
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}
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this.displayed = false;
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}
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};
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/**
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* Reposition the item horizontally
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* @Override
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*/
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PointItem.prototype.repositionX = function() {
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var start = this.conversion.toScreen(this.data.start);
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this.left = start - this.props.dot.width;
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// reposition point
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this.dom.point.style.left = this.left + 'px';
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};
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/**
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* Reposition the item vertically
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* @Override
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*/
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PointItem.prototype.repositionY = function() {
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var orientation = this.options.orientation.item;
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var point = this.dom.point;
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if (orientation == 'top') {
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point.style.top = this.top + 'px';
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}
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else {
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point.style.top = (this.parent.height - this.top - this.height) + 'px';
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}
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};
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module.exports = PointItem;
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