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880 lines
27 KiB
880 lines
27 KiB
var util = require('../util');
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var moment = require('../module/moment');
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var Component = require('./component/Component');
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var DateUtil = require('./DateUtil');
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/**
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* @constructor Range
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* A Range controls a numeric range with a start and end value.
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* The Range adjusts the range based on mouse events or programmatic changes,
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* and triggers events when the range is changing or has been changed.
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* @param {{dom: Object, domProps: Object, emitter: Emitter}} body
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* @param {Object} [options] See description at Range.setOptions
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*/
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function Range(body, options) {
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var now = moment().hours(0).minutes(0).seconds(0).milliseconds(0);
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var start = now.clone().add(-3, 'days').valueOf();
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var end = now.clone().add(3, 'days').valueOf();
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this.millisecondsPerPixelCache = undefined;
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if(options === undefined) {
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this.start = start;
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this.end = end;
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} else {
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this.start = options.start || start;
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this.end = options.end || end
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}
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this.rolling = false;
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this.body = body;
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this.deltaDifference = 0;
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this.scaleOffset = 0;
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this.startToFront = false;
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this.endToFront = true;
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// default options
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this.defaultOptions = {
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rtl: false,
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start: null,
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end: null,
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moment: moment,
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direction: 'horizontal', // 'horizontal' or 'vertical'
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moveable: true,
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zoomable: true,
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min: null,
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max: null,
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zoomMin: 10, // milliseconds
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zoomMax: 1000 * 60 * 60 * 24 * 365 * 10000, // milliseconds
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rollingMode: {
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follow: false,
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offset: 0.5
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}
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};
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this.options = util.extend({}, this.defaultOptions);
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this.props = {
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touch: {}
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};
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this.animationTimer = null;
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// drag listeners for dragging
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this.body.emitter.on('panstart', this._onDragStart.bind(this));
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this.body.emitter.on('panmove', this._onDrag.bind(this));
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this.body.emitter.on('panend', this._onDragEnd.bind(this));
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// mouse wheel for zooming
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this.body.emitter.on('mousewheel', this._onMouseWheel.bind(this));
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// pinch to zoom
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this.body.emitter.on('touch', this._onTouch.bind(this));
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this.body.emitter.on('pinch', this._onPinch.bind(this));
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// on click of rolling mode button
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this.body.dom.rollingModeBtn.addEventListener('click', this.startRolling.bind(this));
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this.setOptions(options);
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}
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Range.prototype = new Component();
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/**
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* Set options for the range controller
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* @param {Object} options Available options:
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* {Number | Date | String} start Start date for the range
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* {Number | Date | String} end End date for the range
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* {Number} min Minimum value for start
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* {Number} max Maximum value for end
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* {Number} zoomMin Set a minimum value for
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* (end - start).
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* {Number} zoomMax Set a maximum value for
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* (end - start).
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* {Boolean} moveable Enable moving of the range
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* by dragging. True by default
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* {Boolean} zoomable Enable zooming of the range
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* by pinching/scrolling. True by default
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*/
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Range.prototype.setOptions = function (options) {
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if (options) {
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// copy the options that we know
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var fields = [
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'animation', 'direction', 'min', 'max', 'zoomMin', 'zoomMax', 'moveable', 'zoomable',
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'moment', 'activate', 'hiddenDates', 'zoomKey', 'rtl', 'showCurrentTime', 'rollingMode', 'horizontalScroll'
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];
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util.selectiveExtend(fields, this.options, options);
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if (options.rollingMode && options.rollingMode.follow) {
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this.startRolling();
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}
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if ('start' in options || 'end' in options) {
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// apply a new range. both start and end are optional
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this.setRange(options.start, options.end);
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}
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}
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};
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/**
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* Test whether direction has a valid value
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* @param {String} direction 'horizontal' or 'vertical'
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*/
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function validateDirection (direction) {
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if (direction != 'horizontal' && direction != 'vertical') {
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throw new TypeError('Unknown direction "' + direction + '". ' +
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'Choose "horizontal" or "vertical".');
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}
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}
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/**
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* Start auto refreshing the current time bar
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*/
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Range.prototype.startRolling = function() {
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var me = this;
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function update () {
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me.stopRolling();
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me.rolling = true;
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var interval = me.end - me.start;
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var t = util.convert(new Date(), 'Date').valueOf();
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var start = t - interval * (me.options.rollingMode.offset);
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var end = t + interval * (1 - me.options.rollingMode.offset);
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var options = {
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animation: false
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};
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me.setRange(start, end, options);
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// determine interval to refresh
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var scale = me.conversion(me.body.domProps.center.width).scale;
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interval = 1 / scale / 10;
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if (interval < 30) interval = 30;
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if (interval > 1000) interval = 1000;
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me.body.dom.rollingModeBtn.style.visibility = "hidden";
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// start a renderTimer to adjust for the new time
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me.currentTimeTimer = setTimeout(update, interval);
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}
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update();
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};
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/**
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* Stop auto refreshing the current time bar
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*/
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Range.prototype.stopRolling = function() {
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if (this.currentTimeTimer !== undefined) {
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clearTimeout(this.currentTimeTimer);
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this.rolling = false;
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this.body.dom.rollingModeBtn.style.visibility = "visible";
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}
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};
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/**
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* Set a new start and end range
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* @param {Date | Number | String} [start]
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* @param {Date | Number | String} [end]
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* @param {Object} options Available options:
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* {Boolean | {duration: number, easingFunction: string}} [animation=false]
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* If true, the range is animated
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* smoothly to the new window. An object can be
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* provided to specify duration and easing function.
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* Default duration is 500 ms, and default easing
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* function is 'easeInOutQuad'.
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* {Boolean} [byUser=false]
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* {Event} event Mouse event
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* {Function} a callback funtion to be executed at the end of this function
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*
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*/
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Range.prototype.setRange = function(start, end, options, callback) {
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if (!options) {
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options = {};
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}
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if (options.byUser !== true) {
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options.byUser = false;
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}
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var me = this;
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var finalStart = start != undefined ? util.convert(start, 'Date').valueOf() : null;
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var finalEnd = end != undefined ? util.convert(end, 'Date').valueOf() : null;
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this._cancelAnimation();
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this.millisecondsPerPixelCache = undefined;
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if (options.animation) { // true or an Object
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var initStart = this.start;
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var initEnd = this.end;
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var duration = (typeof options.animation === 'object' && 'duration' in options.animation) ? options.animation.duration : 500;
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var easingName = (typeof options.animation === 'object' && 'easingFunction' in options.animation) ? options.animation.easingFunction : 'easeInOutQuad';
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var easingFunction = util.easingFunctions[easingName];
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if (!easingFunction) {
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throw new Error('Unknown easing function ' + JSON.stringify(easingName) + '. ' +
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'Choose from: ' + Object.keys(util.easingFunctions).join(', '));
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}
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var initTime = new Date().valueOf();
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var anyChanged = false;
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var next = function () {
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if (!me.props.touch.dragging) {
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var now = new Date().valueOf();
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var time = now - initTime;
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var ease = easingFunction(time / duration);
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var done = time > duration;
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var s = (done || finalStart === null) ? finalStart : initStart + (finalStart - initStart) * ease;
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var e = (done || finalEnd === null) ? finalEnd : initEnd + (finalEnd - initEnd) * ease;
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changed = me._applyRange(s, e);
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DateUtil.updateHiddenDates(me.options.moment, me.body, me.options.hiddenDates);
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anyChanged = anyChanged || changed;
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var params = {
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start: new Date(me.start),
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end: new Date(me.end),
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byUser: options.byUser,
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event: options.event
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};
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if (changed) {
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me.body.emitter.emit('rangechange', params);
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}
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if (done) {
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if (anyChanged) {
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me.body.emitter.emit('rangechanged', params);
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if (callback) { return callback() }
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}
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}
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else {
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// animate with as high as possible frame rate, leave 20 ms in between
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// each to prevent the browser from blocking
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me.animationTimer = setTimeout(next, 20);
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}
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}
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};
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return next();
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}
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else {
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var changed = this._applyRange(finalStart, finalEnd);
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DateUtil.updateHiddenDates(this.options.moment, this.body, this.options.hiddenDates);
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if (changed) {
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var params = {
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start: new Date(this.start),
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end: new Date(this.end),
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byUser: options.byUser,
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event: options.event
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};
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this.body.emitter.emit('rangechange', params);
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clearTimeout( me.timeoutID );
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me.timeoutID = setTimeout( function () {
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me.body.emitter.emit('rangechanged', params);
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}, 200 );
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if (callback) { return callback() }
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}
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}
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};
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/**
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* Get the number of milliseconds per pixel.
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*/
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Range.prototype.getMillisecondsPerPixel = function() {
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if (this.millisecondsPerPixelCache === undefined) {
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this.millisecondsPerPixelCache = (this.end - this.start) / this.body.dom.center.clientWidth;
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}
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return this.millisecondsPerPixelCache;
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};
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/**
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* Stop an animation
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* @private
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*/
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Range.prototype._cancelAnimation = function () {
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if (this.animationTimer) {
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clearTimeout(this.animationTimer);
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this.animationTimer = null;
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}
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};
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/**
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* Set a new start and end range. This method is the same as setRange, but
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* does not trigger a range change and range changed event, and it returns
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* true when the range is changed
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* @param {Number} [start]
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* @param {Number} [end]
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* @return {Boolean} changed
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* @private
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*/
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Range.prototype._applyRange = function(start, end) {
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var newStart = (start != null) ? util.convert(start, 'Date').valueOf() : this.start,
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newEnd = (end != null) ? util.convert(end, 'Date').valueOf() : this.end,
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max = (this.options.max != null) ? util.convert(this.options.max, 'Date').valueOf() : null,
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min = (this.options.min != null) ? util.convert(this.options.min, 'Date').valueOf() : null,
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diff;
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// check for valid number
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if (isNaN(newStart) || newStart === null) {
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throw new Error('Invalid start "' + start + '"');
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}
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if (isNaN(newEnd) || newEnd === null) {
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throw new Error('Invalid end "' + end + '"');
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}
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// prevent end < start
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if (newEnd < newStart) {
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newEnd = newStart;
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}
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// prevent start < min
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if (min !== null) {
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if (newStart < min) {
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diff = (min - newStart);
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newStart += diff;
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newEnd += diff;
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// prevent end > max
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if (max != null) {
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if (newEnd > max) {
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newEnd = max;
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}
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}
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}
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}
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// prevent end > max
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if (max !== null) {
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if (newEnd > max) {
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diff = (newEnd - max);
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newStart -= diff;
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newEnd -= diff;
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// prevent start < min
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if (min != null) {
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if (newStart < min) {
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newStart = min;
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}
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}
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}
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}
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// prevent (end-start) < zoomMin
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if (this.options.zoomMin !== null) {
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var zoomMin = parseFloat(this.options.zoomMin);
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if (zoomMin < 0) {
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zoomMin = 0;
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}
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if ((newEnd - newStart) < zoomMin) {
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// compensate for a scale of 0.5 ms
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var compensation = 0.5;
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if ((this.end - this.start) === zoomMin && newStart >= this.start - compensation && newEnd <= this.end) {
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// ignore this action, we are already zoomed to the minimum
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newStart = this.start;
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newEnd = this.end;
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}
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else {
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// zoom to the minimum
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diff = (zoomMin - (newEnd - newStart));
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newStart -= diff / 2;
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newEnd += diff / 2;
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}
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}
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}
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// prevent (end-start) > zoomMax
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if (this.options.zoomMax !== null) {
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var zoomMax = parseFloat(this.options.zoomMax);
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if (zoomMax < 0) {
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zoomMax = 0;
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}
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if ((newEnd - newStart) > zoomMax) {
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if ((this.end - this.start) === zoomMax && newStart < this.start && newEnd > this.end) {
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// ignore this action, we are already zoomed to the maximum
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newStart = this.start;
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newEnd = this.end;
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}
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else {
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// zoom to the maximum
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diff = ((newEnd - newStart) - zoomMax);
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newStart += diff / 2;
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newEnd -= diff / 2;
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}
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}
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}
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var changed = (this.start != newStart || this.end != newEnd);
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// if the new range does NOT overlap with the old range, emit checkRangedItems to avoid not showing ranged items (ranged meaning has end time, not necessarily of type Range)
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if (!((newStart >= this.start && newStart <= this.end) || (newEnd >= this.start && newEnd <= this.end)) &&
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!((this.start >= newStart && this.start <= newEnd) || (this.end >= newStart && this.end <= newEnd) )) {
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this.body.emitter.emit('checkRangedItems');
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}
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this.start = newStart;
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this.end = newEnd;
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return changed;
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};
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/**
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* Retrieve the current range.
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* @return {Object} An object with start and end properties
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*/
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Range.prototype.getRange = function() {
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return {
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start: this.start,
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end: this.end
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};
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};
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/**
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* Calculate the conversion offset and scale for current range, based on
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* the provided width
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* @param {Number} width
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* @returns {{offset: number, scale: number}} conversion
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*/
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Range.prototype.conversion = function (width, totalHidden) {
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return Range.conversion(this.start, this.end, width, totalHidden);
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};
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/**
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* Static method to calculate the conversion offset and scale for a range,
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* based on the provided start, end, and width
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* @param {Number} start
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* @param {Number} end
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* @param {Number} width
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* @returns {{offset: number, scale: number}} conversion
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*/
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Range.conversion = function (start, end, width, totalHidden) {
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if (totalHidden === undefined) {
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totalHidden = 0;
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}
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if (width != 0 && (end - start != 0)) {
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return {
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offset: start,
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scale: width / (end - start - totalHidden)
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}
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}
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else {
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return {
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offset: 0,
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scale: 1
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};
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}
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};
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/**
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* Start dragging horizontally or vertically
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* @param {Event} event
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* @private
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*/
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Range.prototype._onDragStart = function(event) {
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this.deltaDifference = 0;
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this.previousDelta = 0;
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// only allow dragging when configured as movable
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if (!this.options.moveable) return;
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// only start dragging when the mouse is inside the current range
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if (!this._isInsideRange(event)) return;
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// refuse to drag when we where pinching to prevent the timeline make a jump
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// when releasing the fingers in opposite order from the touch screen
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if (!this.props.touch.allowDragging) return;
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this.stopRolling();
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this.props.touch.start = this.start;
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this.props.touch.end = this.end;
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this.props.touch.dragging = true;
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if (this.body.dom.root) {
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this.body.dom.root.style.cursor = 'move';
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}
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};
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/**
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* Perform dragging operation
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* @param {Event} event
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* @private
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*/
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Range.prototype._onDrag = function (event) {
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if (!event) return;
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if (!this.props.touch.dragging) return;
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// only allow dragging when configured as movable
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if (!this.options.moveable) return;
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// TODO: this may be redundant in hammerjs2
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// refuse to drag when we where pinching to prevent the timeline make a jump
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// when releasing the fingers in opposite order from the touch screen
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if (!this.props.touch.allowDragging) return;
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var direction = this.options.direction;
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validateDirection(direction);
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var delta = (direction == 'horizontal') ? event.deltaX : event.deltaY;
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delta -= this.deltaDifference;
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var interval = (this.props.touch.end - this.props.touch.start);
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// normalize dragging speed if cutout is in between.
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var duration = DateUtil.getHiddenDurationBetween(this.body.hiddenDates, this.start, this.end);
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interval -= duration;
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var width = (direction == 'horizontal') ? this.body.domProps.center.width : this.body.domProps.center.height;
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var diffRange;
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if (this.options.rtl) {
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diffRange = delta / width * interval;
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} else {
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diffRange = -delta / width * interval;
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}
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var newStart = this.props.touch.start + diffRange;
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var newEnd = this.props.touch.end + diffRange;
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// snapping times away from hidden zones
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var safeStart = DateUtil.snapAwayFromHidden(this.body.hiddenDates, newStart, this.previousDelta-delta, true);
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var safeEnd = DateUtil.snapAwayFromHidden(this.body.hiddenDates, newEnd, this.previousDelta-delta, true);
|
|
if (safeStart != newStart || safeEnd != newEnd) {
|
|
this.deltaDifference += delta;
|
|
this.props.touch.start = safeStart;
|
|
this.props.touch.end = safeEnd;
|
|
this._onDrag(event);
|
|
return;
|
|
}
|
|
|
|
this.previousDelta = delta;
|
|
this._applyRange(newStart, newEnd);
|
|
|
|
|
|
var startDate = new Date(this.start);
|
|
var endDate = new Date(this.end);
|
|
|
|
// fire a rangechange event
|
|
this.body.emitter.emit('rangechange', {
|
|
start: startDate,
|
|
end: endDate,
|
|
byUser: true,
|
|
event: event
|
|
});
|
|
|
|
// fire a panmove event
|
|
this.body.emitter.emit('panmove');
|
|
};
|
|
|
|
/**
|
|
* Stop dragging operation
|
|
* @param {event} event
|
|
* @private
|
|
*/
|
|
Range.prototype._onDragEnd = function (event) {
|
|
if (!this.props.touch.dragging) return;
|
|
|
|
// only allow dragging when configured as movable
|
|
if (!this.options.moveable) return;
|
|
|
|
// TODO: this may be redundant in hammerjs2
|
|
// 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.props.touch.allowDragging) return;
|
|
|
|
this.props.touch.dragging = false;
|
|
if (this.body.dom.root) {
|
|
this.body.dom.root.style.cursor = 'auto';
|
|
}
|
|
|
|
// fire a rangechanged event
|
|
this.body.emitter.emit('rangechanged', {
|
|
start: new Date(this.start),
|
|
end: new Date(this.end),
|
|
byUser: true,
|
|
event: event
|
|
});
|
|
};
|
|
|
|
/**
|
|
* Event handler for mouse wheel event, used to zoom
|
|
* Code from http://adomas.org/javascript-mouse-wheel/
|
|
* @param {Event} event
|
|
* @private
|
|
*/
|
|
Range.prototype._onMouseWheel = function(event) {
|
|
// retrieve delta
|
|
var delta = 0;
|
|
if (event.wheelDelta) { /* IE/Opera. */
|
|
delta = event.wheelDelta / 120;
|
|
} else if (event.detail) { /* Mozilla case. */
|
|
// In Mozilla, sign of delta is different than in IE.
|
|
// Also, delta is multiple of 3.
|
|
delta = -event.detail / 3;
|
|
}
|
|
|
|
// don't allow zoom when the according key is pressed and the zoomKey option or not zoomable but movable
|
|
if ((this.options.zoomKey && !event[this.options.zoomKey] && this.options.zoomable)
|
|
|| (!this.options.zoomable && this.options.moveable)) {
|
|
return;
|
|
}
|
|
|
|
// only allow zooming when configured as zoomable and moveable
|
|
if (!(this.options.zoomable && this.options.moveable)) return;
|
|
|
|
// only zoom when the mouse is inside the current range
|
|
if (!this._isInsideRange(event)) return;
|
|
|
|
// If delta is nonzero, handle it.
|
|
// Basically, delta is now positive if wheel was scrolled up,
|
|
// and negative, if wheel was scrolled down.
|
|
if (delta) {
|
|
// perform the zoom action. Delta is normally 1 or -1
|
|
|
|
// adjust a negative delta such that zooming in with delta 0.1
|
|
// equals zooming out with a delta -0.1
|
|
var scale;
|
|
if (delta < 0) {
|
|
scale = 1 - (delta / 5);
|
|
}
|
|
else {
|
|
scale = 1 / (1 + (delta / 5)) ;
|
|
}
|
|
|
|
// calculate center, the date to zoom around
|
|
var pointerDate;
|
|
if (this.rolling) {
|
|
pointerDate = this.start + ((this.end - this.start) * this.options.rollingMode.offset);
|
|
} else {
|
|
var pointer = this.getPointer({x: event.clientX, y: event.clientY}, this.body.dom.center);
|
|
pointerDate = this._pointerToDate(pointer);
|
|
}
|
|
this.zoom(scale, pointerDate, delta, event);
|
|
|
|
// Prevent default actions caused by mouse wheel
|
|
// (else the page and timeline both scroll)
|
|
event.preventDefault();
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Start of a touch gesture
|
|
* @private
|
|
*/
|
|
Range.prototype._onTouch = function (event) { // eslint-disable-line no-unused-vars
|
|
this.props.touch.start = this.start;
|
|
this.props.touch.end = this.end;
|
|
this.props.touch.allowDragging = true;
|
|
this.props.touch.center = null;
|
|
this.scaleOffset = 0;
|
|
this.deltaDifference = 0;
|
|
// Disable the browser default handling of this event.
|
|
util.preventDefault(event);
|
|
};
|
|
|
|
/**
|
|
* Handle pinch event
|
|
* @param {Event} event
|
|
* @private
|
|
*/
|
|
Range.prototype._onPinch = function (event) {
|
|
// only allow zooming when configured as zoomable and moveable
|
|
if (!(this.options.zoomable && this.options.moveable)) return;
|
|
|
|
// Disable the browser default handling of this event.
|
|
util.preventDefault(event);
|
|
|
|
this.props.touch.allowDragging = false;
|
|
|
|
if (!this.props.touch.center) {
|
|
this.props.touch.center = this.getPointer(event.center, this.body.dom.center);
|
|
}
|
|
|
|
this.stopRolling();
|
|
|
|
var scale = 1 / (event.scale + this.scaleOffset);
|
|
var centerDate = this._pointerToDate(this.props.touch.center);
|
|
|
|
var hiddenDuration = DateUtil.getHiddenDurationBetween(this.body.hiddenDates, this.start, this.end);
|
|
var hiddenDurationBefore = DateUtil.getHiddenDurationBefore(this.options.moment, this.body.hiddenDates, this, centerDate);
|
|
var hiddenDurationAfter = hiddenDuration - hiddenDurationBefore;
|
|
|
|
// calculate new start and end
|
|
var newStart = (centerDate - hiddenDurationBefore) + (this.props.touch.start - (centerDate - hiddenDurationBefore)) * scale;
|
|
var newEnd = (centerDate + hiddenDurationAfter) + (this.props.touch.end - (centerDate + hiddenDurationAfter)) * scale;
|
|
|
|
// snapping times away from hidden zones
|
|
this.startToFront = 1 - scale <= 0; // used to do the right auto correction with periodic hidden times
|
|
this.endToFront = scale - 1 <= 0; // used to do the right auto correction with periodic hidden times
|
|
|
|
var safeStart = DateUtil.snapAwayFromHidden(this.body.hiddenDates, newStart, 1 - scale, true);
|
|
var safeEnd = DateUtil.snapAwayFromHidden(this.body.hiddenDates, newEnd, scale - 1, true);
|
|
if (safeStart != newStart || safeEnd != newEnd) {
|
|
this.props.touch.start = safeStart;
|
|
this.props.touch.end = safeEnd;
|
|
this.scaleOffset = 1 - event.scale;
|
|
newStart = safeStart;
|
|
newEnd = safeEnd;
|
|
}
|
|
|
|
var options = {
|
|
animation: false,
|
|
byUser: true,
|
|
event: event
|
|
};
|
|
this.setRange(newStart, newEnd, options);
|
|
|
|
this.startToFront = false; // revert to default
|
|
this.endToFront = true; // revert to default
|
|
};
|
|
|
|
/**
|
|
* Test whether the mouse from a mouse event is inside the visible window,
|
|
* between the current start and end date
|
|
* @param {Object} event
|
|
* @return {boolean} Returns true when inside the visible window
|
|
* @private
|
|
*/
|
|
Range.prototype._isInsideRange = function(event) {
|
|
// calculate the time where the mouse is, check whether inside
|
|
// and no scroll action should happen.
|
|
var clientX = event.center ? event.center.x : event.clientX;
|
|
var x;
|
|
if (this.options.rtl) {
|
|
x = clientX - util.getAbsoluteLeft(this.body.dom.centerContainer);
|
|
} else {
|
|
x = util.getAbsoluteRight(this.body.dom.centerContainer) - clientX;
|
|
}
|
|
var time = this.body.util.toTime(x);
|
|
|
|
return time >= this.start && time <= this.end;
|
|
};
|
|
|
|
/**
|
|
* Helper function to calculate the center date for zooming
|
|
* @param {{x: Number, y: Number}} pointer
|
|
* @return {number} date
|
|
* @private
|
|
*/
|
|
Range.prototype._pointerToDate = function (pointer) {
|
|
var conversion;
|
|
var direction = this.options.direction;
|
|
|
|
validateDirection(direction);
|
|
|
|
if (direction == 'horizontal') {
|
|
return this.body.util.toTime(pointer.x).valueOf();
|
|
}
|
|
else {
|
|
var height = this.body.domProps.center.height;
|
|
conversion = this.conversion(height);
|
|
return pointer.y / conversion.scale + conversion.offset;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Get the pointer location relative to the location of the dom element
|
|
* @param {{x: Number, y: Number}} touch
|
|
* @param {Element} element HTML DOM element
|
|
* @return {{x: Number, y: Number}} pointer
|
|
* @private
|
|
*/
|
|
Range.prototype.getPointer = function (touch, element) {
|
|
if (this.options.rtl) {
|
|
return {
|
|
x: util.getAbsoluteRight(element) - touch.x,
|
|
y: touch.y - util.getAbsoluteTop(element)
|
|
};
|
|
} else {
|
|
return {
|
|
x: touch.x - util.getAbsoluteLeft(element),
|
|
y: touch.y - util.getAbsoluteTop(element)
|
|
};
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Zoom the range the given scale in or out. Start and end date will
|
|
* be adjusted, and the timeline will be redrawn. You can optionally give a
|
|
* date around which to zoom.
|
|
* For example, try scale = 0.9 or 1.1
|
|
* @param {Number} scale Scaling factor. Values above 1 will zoom out,
|
|
* values below 1 will zoom in.
|
|
* @param {Number} [center] Value representing a date around which will
|
|
* be zoomed.
|
|
*/
|
|
Range.prototype.zoom = function(scale, center, delta, event) {
|
|
// if centerDate is not provided, take it half between start Date and end Date
|
|
if (center == null) {
|
|
center = (this.start + this.end) / 2;
|
|
}
|
|
|
|
var hiddenDuration = DateUtil.getHiddenDurationBetween(this.body.hiddenDates, this.start, this.end);
|
|
var hiddenDurationBefore = DateUtil.getHiddenDurationBefore(this.options.moment, this.body.hiddenDates, this, center);
|
|
var hiddenDurationAfter = hiddenDuration - hiddenDurationBefore;
|
|
|
|
// calculate new start and end
|
|
var newStart = (center-hiddenDurationBefore) + (this.start - (center-hiddenDurationBefore)) * scale;
|
|
var newEnd = (center+hiddenDurationAfter) + (this.end - (center+hiddenDurationAfter)) * scale;
|
|
|
|
// snapping times away from hidden zones
|
|
this.startToFront = delta > 0 ? false : true; // used to do the right autocorrection with periodic hidden times
|
|
this.endToFront = -delta > 0 ? false : true; // used to do the right autocorrection with periodic hidden times
|
|
var safeStart = DateUtil.snapAwayFromHidden(this.body.hiddenDates, newStart, delta, true);
|
|
var safeEnd = DateUtil.snapAwayFromHidden(this.body.hiddenDates, newEnd, -delta, true);
|
|
if (safeStart != newStart || safeEnd != newEnd) {
|
|
newStart = safeStart;
|
|
newEnd = safeEnd;
|
|
}
|
|
|
|
var options = {
|
|
animation: false,
|
|
byUser: true,
|
|
event: event
|
|
};
|
|
this.setRange(newStart, newEnd, options);
|
|
|
|
this.startToFront = false; // revert to default
|
|
this.endToFront = true; // revert to default
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
* Move the range with a given delta to the left or right. Start and end
|
|
* value will be adjusted. For example, try delta = 0.1 or -0.1
|
|
* @param {Number} delta Moving amount. Positive value will move right,
|
|
* negative value will move left
|
|
*/
|
|
Range.prototype.move = function(delta) {
|
|
// zoom start Date and end Date relative to the centerDate
|
|
var diff = (this.end - this.start);
|
|
|
|
// apply new values
|
|
var newStart = this.start + diff * delta;
|
|
var newEnd = this.end + diff * delta;
|
|
|
|
// TODO: reckon with min and max range
|
|
|
|
this.start = newStart;
|
|
this.end = newEnd;
|
|
};
|
|
|
|
/**
|
|
* Move the range to a new center point
|
|
* @param {Number} moveTo New center point of the range
|
|
*/
|
|
Range.prototype.moveTo = function(moveTo) {
|
|
var center = (this.start + this.end) / 2;
|
|
|
|
var diff = center - moveTo;
|
|
|
|
// calculate new start and end
|
|
var newStart = this.start - diff;
|
|
var newEnd = this.end - diff;
|
|
|
|
var options = {
|
|
animation: false,
|
|
byUser: true,
|
|
event: null
|
|
};
|
|
this.setRange(newStart, newEnd, options);
|
|
};
|
|
|
|
module.exports = Range;
|