var Emitter = require('emitter-component'); var Hammer = require('../module/hammer'); var hammerUtil = require('../hammerUtil'); var util = require('../util'); var DataSet = require('../DataSet'); var DataView = require('../DataView'); var Range = require('./Range'); var ItemSet = require('./component/ItemSet'); var TimeAxis = require('./component/TimeAxis'); var Activator = require('../shared/Activator'); var DateUtil = require('./DateUtil'); var CustomTime = require('./component/CustomTime'); /** * Create a timeline visualization * @constructor */ function Core () {} // turn Core into an event emitter Emitter(Core.prototype); /** * Create the main DOM for the Core: a root panel containing left, right, * top, bottom, content, and background panel. * @param {Element} container The container element where the Core will * be attached. * @protected */ Core.prototype._create = function (container) { this.dom = {}; this.dom.root = document.createElement('div'); this.dom.background = document.createElement('div'); this.dom.backgroundVertical = document.createElement('div'); this.dom.backgroundHorizontal = document.createElement('div'); this.dom.centerContainer = document.createElement('div'); this.dom.leftContainer = document.createElement('div'); this.dom.rightContainer = document.createElement('div'); this.dom.center = document.createElement('div'); this.dom.left = document.createElement('div'); this.dom.right = document.createElement('div'); this.dom.top = document.createElement('div'); this.dom.bottom = document.createElement('div'); this.dom.shadowTop = document.createElement('div'); this.dom.shadowBottom = document.createElement('div'); this.dom.shadowTopLeft = document.createElement('div'); this.dom.shadowBottomLeft = document.createElement('div'); this.dom.shadowTopRight = document.createElement('div'); this.dom.shadowBottomRight = document.createElement('div'); this.dom.root.className = 'vis-timeline'; this.dom.background.className = 'vis-panel vis-background'; this.dom.backgroundVertical.className = 'vis-panel vis-background vis-vertical'; this.dom.backgroundHorizontal.className = 'vis-panel vis-background vis-horizontal'; this.dom.centerContainer.className = 'vis-panel vis-center'; this.dom.leftContainer.className = 'vis-panel vis-left'; this.dom.rightContainer.className = 'vis-panel vis-right'; this.dom.top.className = 'vis-panel vis-top'; this.dom.bottom.className = 'vis-panel vis-bottom'; this.dom.left.className = 'vis-content'; this.dom.center.className = 'vis-content'; this.dom.right.className = 'vis-content'; this.dom.shadowTop.className = 'vis-shadow vis-top'; this.dom.shadowBottom.className = 'vis-shadow vis-bottom'; this.dom.shadowTopLeft.className = 'vis-shadow vis-top'; this.dom.shadowBottomLeft.className = 'vis-shadow vis-bottom'; this.dom.shadowTopRight.className = 'vis-shadow vis-top'; this.dom.shadowBottomRight.className = 'vis-shadow vis-bottom'; this.dom.root.appendChild(this.dom.background); this.dom.root.appendChild(this.dom.backgroundVertical); this.dom.root.appendChild(this.dom.backgroundHorizontal); this.dom.root.appendChild(this.dom.centerContainer); this.dom.root.appendChild(this.dom.leftContainer); this.dom.root.appendChild(this.dom.rightContainer); this.dom.root.appendChild(this.dom.top); this.dom.root.appendChild(this.dom.bottom); this.dom.centerContainer.appendChild(this.dom.center); this.dom.leftContainer.appendChild(this.dom.left); this.dom.rightContainer.appendChild(this.dom.right); this.dom.centerContainer.appendChild(this.dom.shadowTop); this.dom.centerContainer.appendChild(this.dom.shadowBottom); this.dom.leftContainer.appendChild(this.dom.shadowTopLeft); this.dom.leftContainer.appendChild(this.dom.shadowBottomLeft); this.dom.rightContainer.appendChild(this.dom.shadowTopRight); this.dom.rightContainer.appendChild(this.dom.shadowBottomRight); this.on('rangechange', this.redraw.bind(this)); this.on('touch', this._onTouch.bind(this)); this.on('pan', this._onDrag.bind(this)); var me = this; this.on('change', function (properties) { if (properties && properties.queue == true) { // redraw once on next tick if (!me._redrawTimer) { me._redrawTimer = setTimeout(function () { me._redrawTimer = null; me._redraw(); }, 0) } } else { // redraw immediately me._redraw(); } }); // create event listeners for all interesting events, these events will be // emitted via emitter this.hammer = new Hammer(this.dom.root); this.hammer.get('pinch').set({enable: true}); this.listeners = {}; var events = [ 'tap', 'doubletap', 'press', 'pinch', 'pan', 'panstart', 'panmove', 'panend' // TODO: cleanup //'touch', 'pinch', //'tap', 'doubletap', 'hold', //'dragstart', 'drag', 'dragend', //'mousewheel', 'DOMMouseScroll' // DOMMouseScroll is needed for Firefox ]; events.forEach(function (type) { var listener = function (event) { if (me.isActive()) { me.emit(type, event); } }; me.hammer.on(type, listener); me.listeners[type] = listener; }); // emulate a touch event (emitted before the start of a pan, pinch, tap, or press) hammerUtil.onTouch(this.hammer, function (event) { me.emit('touch', event); }.bind(this)); // emulate a release event (emitted after a pan, pinch, tap, or press) hammerUtil.onRelease(this.hammer, function (event) { me.emit('release', event); }.bind(this)); function onMouseWheel(event) { if (me.isActive()) { me.emit('mousewheel', event); } } this.dom.root.addEventListener('mousewheel', onMouseWheel); this.dom.root.addEventListener('DOMMouseScroll', onMouseWheel); // size properties of each of the panels this.props = { root: {}, background: {}, centerContainer: {}, leftContainer: {}, rightContainer: {}, center: {}, left: {}, right: {}, top: {}, bottom: {}, border: {}, scrollTop: 0, scrollTopMin: 0 }; this.customTimes = []; // store state information needed for touch events this.touch = {}; this.redrawCount = 0; // attach the root panel to the provided container if (!container) throw new Error('No container provided'); container.appendChild(this.dom.root); }; /** * Set options. Options will be passed to all components loaded in the Timeline. * @param {Object} [options] * {String} orientation * Vertical orientation for the Timeline, * can be 'bottom' (default) or 'top'. * {String | Number} width * Width for the timeline, a number in pixels or * a css string like '1000px' or '75%'. '100%' by default. * {String | Number} height * Fixed height for the Timeline, a number in pixels or * a css string like '400px' or '75%'. If undefined, * The Timeline will automatically size such that * its contents fit. * {String | Number} minHeight * Minimum height for the Timeline, a number in pixels or * a css string like '400px' or '75%'. * {String | Number} maxHeight * Maximum height for the Timeline, a number in pixels or * a css string like '400px' or '75%'. * {Number | Date | String} start * Start date for the visible window * {Number | Date | String} end * End date for the visible window */ Core.prototype.setOptions = function (options) { if (options) { // copy the known options var fields = ['width', 'height', 'minHeight', 'maxHeight', 'autoResize', 'start', 'end', 'clickToUse', 'dataAttributes', 'hiddenDates']; util.selectiveExtend(fields, this.options, options); if ('orientation' in options) { if (typeof options.orientation === 'string') { this.options.orientation = { item: options.orientation, axis: options.orientation }; } else if (typeof options.orientation === 'object') { if ('item' in options.orientation) { this.options.orientation.item = options.orientation.item; } if ('axis' in options.orientation) { this.options.orientation.axis = options.orientation.axis; } } } if (this.options.orientation.axis === 'both') { if (!this.timeAxis2) { var timeAxis2 = this.timeAxis2 = new TimeAxis(this.body); timeAxis2.setOptions = function (options) { var _options = options ? util.extend({}, options) : {}; _options.orientation = 'top'; // override the orientation option, always top TimeAxis.prototype.setOptions.call(timeAxis2, _options); }; this.components.push(timeAxis2); } } else { if (this.timeAxis2) { var index = this.components.indexOf(this.timeAxis2); if (index !== -1) { this.components.splice(index, 1); } this.timeAxis2.destroy(); this.timeAxis2 = null; } } if ('hiddenDates' in this.options) { DateUtil.convertHiddenOptions(this.body, this.options.hiddenDates); } if ('clickToUse' in options) { if (options.clickToUse) { if (!this.activator) { this.activator = new Activator(this.dom.root); } } else { if (this.activator) { this.activator.destroy(); delete this.activator; } } } if ('showCustomTime' in options) { throw new Error('Option `showCustomTime` is deprecated. Create a custom time bar via timeline.addCustomTime(time [, id])'); } // enable/disable autoResize this._initAutoResize(); } // propagate options to all components this.components.forEach(component => component.setOptions(options)); // enable/disable configure if (this.configurator) { this.configurator.setOptions(options.configure); // collect the settings of all components, and pass them to the configuration system var appliedOptions = util.deepExtend({}, this.options); this.components.forEach(function (component) { util.deepExtend(appliedOptions, component.options); }); this.configurator.setModuleOptions({global: appliedOptions}); } // redraw everything this._redraw(); }; /** * Returns true when the Timeline is active. * @returns {boolean} */ Core.prototype.isActive = function () { return !this.activator || this.activator.active; }; /** * Destroy the Core, clean up all DOM elements and event listeners. */ Core.prototype.destroy = function () { // unbind datasets this.setItems(null); this.setGroups(null); // remove all event listeners this.off(); // stop checking for changed size this._stopAutoResize(); // remove from DOM if (this.dom.root.parentNode) { this.dom.root.parentNode.removeChild(this.dom.root); } this.dom = null; // remove Activator if (this.activator) { this.activator.destroy(); delete this.activator; } // cleanup hammer touch events for (var event in this.listeners) { if (this.listeners.hasOwnProperty(event)) { delete this.listeners[event]; } } this.listeners = null; this.hammer = null; // give all components the opportunity to cleanup this.components.forEach(component => component.destroy()); this.body = null; }; /** * Set a custom time bar * @param {Date} time * @param {number} [id=undefined] Optional id of the custom time bar to be adjusted. */ Core.prototype.setCustomTime = function (time, id) { var customTimes = this.customTimes.filter(function (component) { return id === component.options.id; }); if (customTimes.length === 0) { throw new Error('No custom time bar found with id ' + JSON.stringify(id)) } if (customTimes.length > 0) { customTimes[0].setCustomTime(time); } }; /** * Retrieve the current custom time. * @param {number} [id=undefined] Id of the custom time bar. * @return {Date | undefined} customTime */ Core.prototype.getCustomTime = function(id) { var customTimes = this.customTimes.filter(function (component) { return component.options.id === id; }); if (customTimes.length === 0) { throw new Error('No custom time bar found with id ' + JSON.stringify(id)) } return customTimes[0].getCustomTime(); }; /** * Add custom vertical bar * @param {Date | String | Number} [time] A Date, unix timestamp, or * ISO date string. Time point where * the new bar should be placed. * If not provided, `new Date()` will * be used. * @param {Number | String} [id=undefined] Id of the new bar. Optional * @return {Number | String} Returns the id of the new bar */ Core.prototype.addCustomTime = function (time, id) { var timestamp = time !== undefined ? util.convert(time, 'Date').valueOf() : new Date(); var exists = this.customTimes.some(function (customTime) { return customTime.options.id === id; }); if (exists) { throw new Error('A custom time with id ' + JSON.stringify(id) + ' already exists'); } var customTime = new CustomTime(this.body, { time : timestamp, id : id }); this.customTimes.push(customTime); this.components.push(customTime); this.redraw(); return id; }; /** * Remove previously added custom bar * @param {int} id ID of the custom bar to be removed * @return {boolean} True if the bar exists and is removed, false otherwise */ Core.prototype.removeCustomTime = function (id) { var customTimes = this.customTimes.filter(function (bar) { return (bar.options.id === id); }); if (customTimes.length === 0) { throw new Error('No custom time bar found with id ' + JSON.stringify(id)) } customTimes.forEach(function (customTime) { this.customTimes.splice(this.customTimes.indexOf(customTime), 1); this.components.splice(this.components.indexOf(customTime), 1); customTime.destroy(); }.bind(this)) }; /** * Get the id's of the currently visible items. * @returns {Array} The ids of the visible items */ Core.prototype.getVisibleItems = function() { return this.itemSet && this.itemSet.getVisibleItems() || []; }; /** * Set Core window such that it fits all items * @param {Object} [options] Available options: * `animation: boolean | {duration: number, easingFunction: string}` * If true (default), the range is animated * smoothly to the new window. An object can be * provided to specify duration and easing function. * Default duration is 500 ms, and default easing * function is 'easeInOutQuad'. */ Core.prototype.fit = function(options) { var range = this.getDataRange(); // skip range set if there is no min and max date if (range.min === null && range.max === null) { return; } // apply a margin of 1% left and right of the data var interval = range.max - range.min; var min = new Date(range.min.valueOf() - interval * 0.01); var max = new Date(range.max.valueOf() + interval * 0.01); var animation = (options && options.animation !== undefined) ? options.animation : true; this.range.setRange(min, max, animation); }; /** * Calculate the data range of the items start and end dates * @returns {{min: Date | null, max: Date | null}} * @protected */ Core.prototype.getDataRange = function() { // must be implemented by Timeline and Graph2d throw new Error('Cannot invoke abstract method getDataRange'); }; /** * Set the visible window. Both parameters are optional, you can change only * start or only end. Syntax: * * TimeLine.setWindow(start, end) * TimeLine.setWindow(start, end, options) * TimeLine.setWindow(range) * * Where start and end can be a Date, number, or string, and range is an * object with properties start and end. * * @param {Date | Number | String | Object} [start] Start date of visible window * @param {Date | Number | String} [end] End date of visible window * @param {Object} [options] Available options: * `animation: boolean | {duration: number, easingFunction: string}` * If true (default), the range is animated * smoothly to the new window. An object can be * provided to specify duration and easing function. * Default duration is 500 ms, and default easing * function is 'easeInOutQuad'. */ Core.prototype.setWindow = function(start, end, options) { var animation; if (arguments.length == 1) { var range = arguments[0]; animation = (range.animation !== undefined) ? range.animation : true; this.range.setRange(range.start, range.end, animation); } else { animation = (options && options.animation !== undefined) ? options.animation : true; this.range.setRange(start, end, animation); } }; /** * Move the window such that given time is centered on screen. * @param {Date | Number | String} time * @param {Object} [options] Available options: * `animation: boolean | {duration: number, easingFunction: string}` * If true (default), the range is animated * smoothly to the new window. An object can be * provided to specify duration and easing function. * Default duration is 500 ms, and default easing * function is 'easeInOutQuad'. */ Core.prototype.moveTo = function(time, options) { var interval = this.range.end - this.range.start; var t = util.convert(time, 'Date').valueOf(); var start = t - interval / 2; var end = t + interval / 2; var animation = (options && options.animation !== undefined) ? options.animation : true; this.range.setRange(start, end, animation); }; /** * Get the visible window * @return {{start: Date, end: Date}} Visible range */ Core.prototype.getWindow = function() { var range = this.range.getRange(); return { start: new Date(range.start), end: new Date(range.end) }; }; /** * Force a redraw. Can be overridden by implementations of Core */ Core.prototype.redraw = function() { this._redraw(); }; /** * Redraw for internal use. Redraws all components. See also the public * method redraw. * @protected */ Core.prototype._redraw = function() { var resized = false; var options = this.options; var props = this.props; var dom = this.dom; if (!dom) return; // when destroyed DateUtil.updateHiddenDates(this.body, this.options.hiddenDates); // update class names if (options.orientation == 'top') { util.addClassName(dom.root, 'vis-top'); util.removeClassName(dom.root, 'vis-bottom'); } else { util.removeClassName(dom.root, 'vis-top'); util.addClassName(dom.root, 'vis-bottom'); } // update root width and height options dom.root.style.maxHeight = util.option.asSize(options.maxHeight, ''); dom.root.style.minHeight = util.option.asSize(options.minHeight, ''); dom.root.style.width = util.option.asSize(options.width, ''); // calculate border widths props.border.left = (dom.centerContainer.offsetWidth - dom.centerContainer.clientWidth) / 2; props.border.right = props.border.left; props.border.top = (dom.centerContainer.offsetHeight - dom.centerContainer.clientHeight) / 2; props.border.bottom = props.border.top; var borderRootHeight= dom.root.offsetHeight - dom.root.clientHeight; var borderRootWidth = dom.root.offsetWidth - dom.root.clientWidth; // workaround for a bug in IE: the clientWidth of an element with // a height:0px and overflow:hidden is not calculated and always has value 0 if (dom.centerContainer.clientHeight === 0) { props.border.left = props.border.top; props.border.right = props.border.left; } if (dom.root.clientHeight === 0) { borderRootWidth = borderRootHeight; } // calculate the heights. If any of the side panels is empty, we set the height to // minus the border width, such that the border will be invisible props.center.height = dom.center.offsetHeight; props.left.height = dom.left.offsetHeight; props.right.height = dom.right.offsetHeight; props.top.height = dom.top.clientHeight || -props.border.top; props.bottom.height = dom.bottom.clientHeight || -props.border.bottom; // TODO: compensate borders when any of the panels is empty. // apply auto height // TODO: only calculate autoHeight when needed (else we cause an extra reflow/repaint of the DOM) var contentHeight = Math.max(props.left.height, props.center.height, props.right.height); var autoHeight = props.top.height + contentHeight + props.bottom.height + borderRootHeight + props.border.top + props.border.bottom; dom.root.style.height = util.option.asSize(options.height, autoHeight + 'px'); // calculate heights of the content panels props.root.height = dom.root.offsetHeight; props.background.height = props.root.height - borderRootHeight; var containerHeight = props.root.height - props.top.height - props.bottom.height - borderRootHeight; props.centerContainer.height = containerHeight; props.leftContainer.height = containerHeight; props.rightContainer.height = props.leftContainer.height; // calculate the widths of the panels props.root.width = dom.root.offsetWidth; props.background.width = props.root.width - borderRootWidth; props.left.width = dom.leftContainer.clientWidth || -props.border.left; props.leftContainer.width = props.left.width; props.right.width = dom.rightContainer.clientWidth || -props.border.right; props.rightContainer.width = props.right.width; var centerWidth = props.root.width - props.left.width - props.right.width - borderRootWidth; props.center.width = centerWidth; props.centerContainer.width = centerWidth; props.top.width = centerWidth; props.bottom.width = centerWidth; // resize the panels dom.background.style.height = props.background.height + 'px'; dom.backgroundVertical.style.height = props.background.height + 'px'; dom.backgroundHorizontal.style.height = props.centerContainer.height + 'px'; dom.centerContainer.style.height = props.centerContainer.height + 'px'; dom.leftContainer.style.height = props.leftContainer.height + 'px'; dom.rightContainer.style.height = props.rightContainer.height + 'px'; dom.background.style.width = props.background.width + 'px'; dom.backgroundVertical.style.width = props.centerContainer.width + 'px'; dom.backgroundHorizontal.style.width = props.background.width + 'px'; dom.centerContainer.style.width = props.center.width + 'px'; dom.top.style.width = props.top.width + 'px'; dom.bottom.style.width = props.bottom.width + 'px'; // reposition the panels dom.background.style.left = '0'; dom.background.style.top = '0'; dom.backgroundVertical.style.left = (props.left.width + props.border.left) + 'px'; dom.backgroundVertical.style.top = '0'; dom.backgroundHorizontal.style.left = '0'; dom.backgroundHorizontal.style.top = props.top.height + 'px'; dom.centerContainer.style.left = props.left.width + 'px'; dom.centerContainer.style.top = props.top.height + 'px'; dom.leftContainer.style.left = '0'; dom.leftContainer.style.top = props.top.height + 'px'; dom.rightContainer.style.left = (props.left.width + props.center.width) + 'px'; dom.rightContainer.style.top = props.top.height + 'px'; dom.top.style.left = props.left.width + 'px'; dom.top.style.top = '0'; dom.bottom.style.left = props.left.width + 'px'; dom.bottom.style.top = (props.top.height + props.centerContainer.height) + 'px'; // update the scrollTop, feasible range for the offset can be changed // when the height of the Core or of the contents of the center changed this._updateScrollTop(); // reposition the scrollable contents var offset = this.props.scrollTop; if (options.orientation.item != 'top') { offset += Math.max(this.props.centerContainer.height - this.props.center.height - this.props.border.top - this.props.border.bottom, 0); } dom.center.style.left = '0'; dom.center.style.top = offset + 'px'; dom.left.style.left = '0'; dom.left.style.top = offset + 'px'; dom.right.style.left = '0'; dom.right.style.top = offset + 'px'; // show shadows when vertical scrolling is available var visibilityTop = this.props.scrollTop == 0 ? 'hidden' : ''; var visibilityBottom = this.props.scrollTop == this.props.scrollTopMin ? 'hidden' : ''; dom.shadowTop.style.visibility = visibilityTop; dom.shadowBottom.style.visibility = visibilityBottom; dom.shadowTopLeft.style.visibility = visibilityTop; dom.shadowBottomLeft.style.visibility = visibilityBottom; dom.shadowTopRight.style.visibility = visibilityTop; dom.shadowBottomRight.style.visibility = visibilityBottom; // redraw all components this.components.forEach(function (component) { resized = component.redraw() || resized; }); if (resized) { // keep repainting until all sizes are settled var MAX_REDRAWS = 3; // maximum number of consecutive redraws if (this.redrawCount < MAX_REDRAWS) { this.redrawCount++; this._redraw(); } else { console.log('WARNING: infinite loop in redraw?'); } this.redrawCount = 0; } }; // TODO: deprecated since version 1.1.0, remove some day Core.prototype.repaint = function () { throw new Error('Function repaint is deprecated. Use redraw instead.'); }; /** * Set a current time. This can be used for example to ensure that a client's * time is synchronized with a shared server time. * Only applicable when option `showCurrentTime` is true. * @param {Date | String | Number} time A Date, unix timestamp, or * ISO date string. */ Core.prototype.setCurrentTime = function(time) { if (!this.currentTime) { throw new Error('Option showCurrentTime must be true'); } this.currentTime.setCurrentTime(time); }; /** * Get the current time. * Only applicable when option `showCurrentTime` is true. * @return {Date} Returns the current time. */ Core.prototype.getCurrentTime = function() { if (!this.currentTime) { throw new Error('Option showCurrentTime must be true'); } return this.currentTime.getCurrentTime(); }; /** * Convert a position on screen (pixels) to a datetime * @param {int} x Position on the screen in pixels * @return {Date} time The datetime the corresponds with given position x * @protected */ // TODO: move this function to Range Core.prototype._toTime = function(x) { return DateUtil.toTime(this, x, this.props.center.width); }; /** * Convert a position on the global screen (pixels) to a datetime * @param {int} x Position on the screen in pixels * @return {Date} time The datetime the corresponds with given position x * @protected */ // TODO: move this function to Range Core.prototype._toGlobalTime = function(x) { return DateUtil.toTime(this, x, this.props.root.width); //var conversion = this.range.conversion(this.props.root.width); //return new Date(x / conversion.scale + conversion.offset); }; /** * Convert a datetime (Date object) into a position on the screen * @param {Date} time A date * @return {int} x The position on the screen in pixels which corresponds * with the given date. * @protected */ // TODO: move this function to Range Core.prototype._toScreen = function(time) { return DateUtil.toScreen(this, time, this.props.center.width); }; /** * Convert a datetime (Date object) into a position on the root * This is used to get the pixel density estimate for the screen, not the center panel * @param {Date} time A date * @return {int} x The position on root in pixels which corresponds * with the given date. * @protected */ // TODO: move this function to Range Core.prototype._toGlobalScreen = function(time) { return DateUtil.toScreen(this, time, this.props.root.width); //var conversion = this.range.conversion(this.props.root.width); //return (time.valueOf() - conversion.offset) * conversion.scale; }; /** * Initialize watching when option autoResize is true * @private */ Core.prototype._initAutoResize = function () { if (this.options.autoResize == true) { this._startAutoResize(); } else { this._stopAutoResize(); } }; /** * Watch for changes in the size of the container. On resize, the Panel will * automatically redraw itself. * @private */ Core.prototype._startAutoResize = function () { var me = this; this._stopAutoResize(); this._onResize = function() { if (me.options.autoResize != true) { // stop watching when the option autoResize is changed to false me._stopAutoResize(); return; } if (me.dom.root) { // check whether the frame is resized // Note: we compare offsetWidth here, not clientWidth. For some reason, // IE does not restore the clientWidth from 0 to the actual width after // changing the timeline's container display style from none to visible if ((me.dom.root.offsetWidth != me.props.lastWidth) || (me.dom.root.offsetHeight != me.props.lastHeight)) { me.props.lastWidth = me.dom.root.offsetWidth; me.props.lastHeight = me.dom.root.offsetHeight; me.emit('change'); } } }; // add event listener to window resize util.addEventListener(window, 'resize', this._onResize); this.watchTimer = setInterval(this._onResize, 1000); }; /** * Stop watching for a resize of the frame. * @private */ Core.prototype._stopAutoResize = function () { if (this.watchTimer) { clearInterval(this.watchTimer); this.watchTimer = undefined; } // remove event listener on window.resize util.removeEventListener(window, 'resize', this._onResize); this._onResize = null; }; /** * Start moving the timeline vertically * @param {Event} event * @private */ Core.prototype._onTouch = function (event) { this.touch.allowDragging = true; this.touch.initialScrollTop = this.props.scrollTop; }; /** * Start moving the timeline vertically * @param {Event} event * @private */ Core.prototype._onPinch = function (event) { this.touch.allowDragging = false; }; /** * Move the timeline vertically * @param {Event} event * @private */ Core.prototype._onDrag = function (event) { // refuse to drag when we where pinching to prevent the timeline make a jump // when releasing the fingers in opposite order from the touch screen if (!this.touch.allowDragging) return; var delta = event.deltaY; var oldScrollTop = this._getScrollTop(); var newScrollTop = this._setScrollTop(this.touch.initialScrollTop + delta); if (newScrollTop != oldScrollTop) { this._redraw(); // TODO: this causes two redraws when dragging, the other is triggered by rangechange already this.emit("verticalDrag"); } }; /** * Apply a scrollTop * @param {Number} scrollTop * @returns {Number} scrollTop Returns the applied scrollTop * @private */ Core.prototype._setScrollTop = function (scrollTop) { this.props.scrollTop = scrollTop; this._updateScrollTop(); return this.props.scrollTop; }; /** * Update the current scrollTop when the height of the containers has been changed * @returns {Number} scrollTop Returns the applied scrollTop * @private */ Core.prototype._updateScrollTop = function () { // recalculate the scrollTopMin var scrollTopMin = Math.min(this.props.centerContainer.height - this.props.center.height, 0); // is negative or zero if (scrollTopMin != this.props.scrollTopMin) { // in case of bottom orientation, change the scrollTop such that the contents // do not move relative to the time axis at the bottom if (this.options.orientation.item != 'top') { this.props.scrollTop += (scrollTopMin - this.props.scrollTopMin); } this.props.scrollTopMin = scrollTopMin; } // limit the scrollTop to the feasible scroll range if (this.props.scrollTop > 0) this.props.scrollTop = 0; if (this.props.scrollTop < scrollTopMin) this.props.scrollTop = scrollTopMin; return this.props.scrollTop; }; /** * Get the current scrollTop * @returns {number} scrollTop * @private */ Core.prototype._getScrollTop = function () { return this.props.scrollTop; }; module.exports = Core;