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Timeline.js
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Timeline.js
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define([
'../../Core/ClockRange',
'../../Core/defined',
'../../Core/destroyObject',
'../../Core/DeveloperError',
'../../Core/JulianDate',
'../getElement',
'./TimelineHighlightRange',
'./TimelineTrack'
], function(
ClockRange,
defined,
destroyObject,
DeveloperError,
JulianDate,
getElement,
TimelineHighlightRange,
TimelineTrack) {
'use strict';
var timelineWheelDelta = 1e12;
var timelineMouseMode = {
none : 0,
scrub : 1,
slide : 2,
zoom : 3,
touchOnly : 4
};
var timelineTouchMode = {
none : 0,
scrub : 1,
slideZoom : 2,
singleTap : 3,
ignore : 4
};
var timelineTicScales = [0.001, 0.002, 0.005, 0.01, 0.02, 0.05, 0.1, 0.25, 0.5, 1.0, 2.0, 5.0, 10.0, 15.0, 30.0, 60.0, // 1min
120.0, // 2min
300.0, // 5min
600.0, // 10min
900.0, // 15min
1800.0, // 30min
3600.0, // 1hr
7200.0, // 2hr
14400.0, // 4hr
21600.0, // 6hr
43200.0, // 12hr
86400.0, // 24hr
172800.0, // 2days
345600.0, // 4days
604800.0, // 7days
1296000.0, // 15days
2592000.0, // 30days
5184000.0, // 60days
7776000.0, // 90days
15552000.0, // 180days
31536000.0, // 365days
63072000.0, // 2years
126144000.0, // 4years
157680000.0, // 5years
315360000.0, // 10years
630720000.0, // 20years
1261440000.0, // 40years
1576800000.0, // 50years
3153600000.0, // 100years
6307200000.0, // 200years
12614400000.0, // 400years
15768000000.0, // 500years
31536000000.0 // 1000years
];
var timelineMonthNames = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
/**
* The Timeline is a widget for displaying and controlling the current scene time.
* @alias Timeline
* @constructor
*
* @param {Element} container The parent HTML container node for this widget.
* @param {Clock} clock The clock to use.
*/
function Timeline(container, clock) {
//>>includeStart('debug', pragmas.debug);
if (!defined(container)) {
throw new DeveloperError('container is required.');
}
if (!defined(clock)) {
throw new DeveloperError('clock is required.');
}
//>>includeEnd('debug');
container = getElement(container);
/**
* Gets the parent container.
* @type {Element}
*/
this.container = container;
var topDiv = document.createElement('div');
topDiv.className = 'cesium-timeline-main';
container.appendChild(topDiv);
this._topDiv = topDiv;
this._endJulian = undefined;
this._epochJulian = undefined;
this._lastXPos = undefined;
this._scrubElement = undefined;
this._startJulian = undefined;
this._timeBarSecondsSpan = undefined;
this._clock = clock;
this._scrubJulian = clock.currentTime;
this._mainTicSpan = -1;
this._mouseMode = timelineMouseMode.none;
this._touchMode = timelineTouchMode.none;
this._touchState = {
centerX : 0,
spanX : 0
};
this._mouseX = 0;
this._timelineDrag = 0;
this._timelineDragLocation = undefined;
this._lastHeight = undefined;
this._lastWidth = undefined;
this._topDiv.innerHTML = '<div class="cesium-timeline-bar"></div><div class="cesium-timeline-trackContainer">' +
'<canvas class="cesium-timeline-tracks" width="10" height="1">' +
'</canvas></div><div class="cesium-timeline-needle"></div><span class="cesium-timeline-ruler"></span>';
this._timeBarEle = this._topDiv.childNodes[0];
this._trackContainer = this._topDiv.childNodes[1];
this._trackListEle = this._topDiv.childNodes[1].childNodes[0];
this._needleEle = this._topDiv.childNodes[2];
this._rulerEle = this._topDiv.childNodes[3];
this._context = this._trackListEle.getContext('2d');
this._trackList = [];
this._highlightRanges = [];
this.zoomTo(clock.startTime, clock.stopTime);
this._onMouseDown = createMouseDownCallback(this);
this._onMouseUp = createMouseUpCallback(this);
this._onMouseMove = createMouseMoveCallback(this);
this._onMouseWheel = createMouseWheelCallback(this);
this._onTouchStart = createTouchStartCallback(this);
this._onTouchMove = createTouchMoveCallback(this);
this._onTouchEnd = createTouchEndCallback(this);
var timeBarEle = this._timeBarEle;
document.addEventListener('mouseup', this._onMouseUp, false);
document.addEventListener('mousemove', this._onMouseMove, false);
timeBarEle.addEventListener('mousedown', this._onMouseDown, false);
timeBarEle.addEventListener('DOMMouseScroll', this._onMouseWheel, false); // Mozilla mouse wheel
timeBarEle.addEventListener('mousewheel', this._onMouseWheel, false);
timeBarEle.addEventListener('touchstart', this._onTouchStart, false);
timeBarEle.addEventListener('touchmove', this._onTouchMove, false);
timeBarEle.addEventListener('touchend', this._onTouchEnd, false);
timeBarEle.addEventListener('touchcancel', this._onTouchEnd, false);
this._topDiv.oncontextmenu = function() {
return false;
};
clock.onTick.addEventListener(this.updateFromClock, this);
this.updateFromClock();
}
/**
* @private
*/
Timeline.prototype.addEventListener = function(type, listener, useCapture) {
this._topDiv.addEventListener(type, listener, useCapture);
};
/**
* @private
*/
Timeline.prototype.removeEventListener = function(type, listener, useCapture) {
this._topDiv.removeEventListener(type, listener, useCapture);
};
/**
* @returns {Boolean} true if the object has been destroyed, false otherwise.
*/
Timeline.prototype.isDestroyed = function() {
return false;
};
/**
* Destroys the widget. Should be called if permanently
* removing the widget from layout.
*/
Timeline.prototype.destroy = function() {
this._clock.onTick.removeEventListener(this.updateFromClock, this);
document.removeEventListener('mouseup', this._onMouseUp, false);
document.removeEventListener('mousemove', this._onMouseMove, false);
var timeBarEle = this._timeBarEle;
timeBarEle.removeEventListener('mousedown', this._onMouseDown, false);
timeBarEle.removeEventListener('DOMMouseScroll', this._onMouseWheel, false); // Mozilla mouse wheel
timeBarEle.removeEventListener('mousewheel', this._onMouseWheel, false);
timeBarEle.removeEventListener('touchstart', this._onTouchStart, false);
timeBarEle.removeEventListener('touchmove', this._onTouchMove, false);
timeBarEle.removeEventListener('touchend', this._onTouchEnd, false);
timeBarEle.removeEventListener('touchcancel', this._onTouchEnd, false);
this.container.removeChild(this._topDiv);
destroyObject(this);
};
/**
* @private
*/
Timeline.prototype.addHighlightRange = function(color, heightInPx, base) {
var newHighlightRange = new TimelineHighlightRange(color, heightInPx, base);
this._highlightRanges.push(newHighlightRange);
this.resize();
return newHighlightRange;
};
/**
* @private
*/
Timeline.prototype.addTrack = function(interval, heightInPx, color, backgroundColor) {
var newTrack = new TimelineTrack(interval, heightInPx, color, backgroundColor);
this._trackList.push(newTrack);
this._lastHeight = undefined;
this.resize();
return newTrack;
};
/**
* Sets the view to the provided times.
*
* @param {JulianDate} startTime The start time.
* @param {JulianDate} stopTime The stop time.
*/
Timeline.prototype.zoomTo = function(startTime, stopTime) {
//>>includeStart('debug', pragmas.debug);
if (!defined(startTime)) {
throw new DeveloperError('startTime is required.');
}
if (!defined(stopTime)) {
throw new DeveloperError('stopTime is required');
}
if (JulianDate.lessThanOrEquals(stopTime, startTime)) {
throw new DeveloperError('Start time must come before end time.');
}
//>>includeEnd('debug');
this._startJulian = startTime;
this._endJulian = stopTime;
this._timeBarSecondsSpan = JulianDate.secondsDifference(stopTime, startTime);
// If clock is not unbounded, clamp timeline range to clock.
if (this._clock && (this._clock.clockRange !== ClockRange.UNBOUNDED)) {
var clockStart = this._clock.startTime;
var clockEnd = this._clock.stopTime;
var clockSpan = JulianDate.secondsDifference(clockEnd, clockStart);
var startOffset = JulianDate.secondsDifference(clockStart, this._startJulian);
var endOffset = JulianDate.secondsDifference(clockEnd, this._endJulian);
if (this._timeBarSecondsSpan >= clockSpan) {
// if new duration longer than clock range duration, clamp to full range.
this._timeBarSecondsSpan = clockSpan;
this._startJulian = this._clock.startTime;
this._endJulian = this._clock.stopTime;
} else if (startOffset > 0) {
// if timeline start is before clock start, shift right
this._endJulian = JulianDate.addSeconds(this._endJulian, startOffset, new JulianDate());
this._startJulian = clockStart;
this._timeBarSecondsSpan = JulianDate.secondsDifference(this._endJulian, this._startJulian);
} else if (endOffset < 0) {
// if timeline end is after clock end, shift left
this._startJulian = JulianDate.addSeconds(this._startJulian, endOffset, new JulianDate());
this._endJulian = clockEnd;
this._timeBarSecondsSpan = JulianDate.secondsDifference(this._endJulian, this._startJulian);
}
}
this._makeTics();
var evt = document.createEvent('Event');
evt.initEvent('setzoom', true, true);
evt.startJulian = this._startJulian;
evt.endJulian = this._endJulian;
evt.epochJulian = this._epochJulian;
evt.totalSpan = this._timeBarSecondsSpan;
evt.mainTicSpan = this._mainTicSpan;
this._topDiv.dispatchEvent(evt);
};
/**
* @private
*/
Timeline.prototype.zoomFrom = function(amount) {
var centerSec = JulianDate.secondsDifference(this._scrubJulian, this._startJulian);
if ((amount > 1) || (centerSec < 0) || (centerSec > this._timeBarSecondsSpan)) {
centerSec = this._timeBarSecondsSpan * 0.5;
} else {
centerSec += (centerSec - this._timeBarSecondsSpan * 0.5);
}
var centerSecFlip = this._timeBarSecondsSpan - centerSec;
this.zoomTo(JulianDate.addSeconds(this._startJulian, centerSec - (centerSec * amount), new JulianDate()), JulianDate.addSeconds(this._endJulian, (centerSecFlip * amount) - centerSecFlip, new JulianDate()));
};
function twoDigits(num) {
return ((num < 10) ? ('0' + num.toString()) : num.toString());
}
/**
* @private
*/
Timeline.prototype.makeLabel = function(time) {
var gregorian = JulianDate.toGregorianDate(time);
var millisecond = gregorian.millisecond, millisecondString = ' UTC';
if ((millisecond > 0) && (this._timeBarSecondsSpan < 3600)) {
millisecondString = Math.floor(millisecond).toString();
while (millisecondString.length < 3) {
millisecondString = '0' + millisecondString;
}
millisecondString = '.' + millisecondString;
}
return timelineMonthNames[gregorian.month - 1] + ' ' + gregorian.day + ' ' + gregorian.year + ' ' + twoDigits(gregorian.hour) +
':' + twoDigits(gregorian.minute) + ':' + twoDigits(gregorian.second) + millisecondString;
};
/**
* @private
*/
Timeline.prototype.smallestTicInPixels = 7.0;
/**
* @private
*/
Timeline.prototype._makeTics = function() {
var timeBar = this._timeBarEle;
var seconds = JulianDate.secondsDifference(this._scrubJulian, this._startJulian);
var xPos = Math.round(seconds * this._topDiv.clientWidth / this._timeBarSecondsSpan);
var scrubX = xPos - 8, tic;
var widget = this;
this._needleEle.style.left = xPos.toString() + 'px';
var tics = '';
var minimumDuration = 0.01;
var maximumDuration = 31536000000.0; // ~1000 years
var epsilon = 1e-10;
// If time step size is known, enter it here...
var minSize = 0;
var duration = this._timeBarSecondsSpan;
if (duration < minimumDuration) {
duration = minimumDuration;
this._timeBarSecondsSpan = minimumDuration;
this._endJulian = JulianDate.addSeconds(this._startJulian, minimumDuration, new JulianDate());
} else if (duration > maximumDuration) {
duration = maximumDuration;
this._timeBarSecondsSpan = maximumDuration;
this._endJulian = JulianDate.addSeconds(this._startJulian, maximumDuration, new JulianDate());
}
var timeBarWidth = this._timeBarEle.clientWidth;
if (timeBarWidth < 10) {
timeBarWidth = 10;
}
var startJulian = this._startJulian;
// epsilonTime: a small fraction of one pixel width of the timeline, measured in seconds.
var epsilonTime = Math.min((duration / timeBarWidth) * 1e-5, 0.4);
// epochJulian: a nearby time to be considered "zero seconds", should be a round-ish number by human standards.
var epochJulian;
var gregorianDate = JulianDate.toGregorianDate(startJulian);
if (duration > 315360000) { // 3650+ days visible, epoch is start of the first visible century.
epochJulian = JulianDate.fromDate(new Date(Date.UTC(Math.floor(gregorianDate.year / 100) * 100, 0)));
} else if (duration > 31536000) { // 365+ days visible, epoch is start of the first visible decade.
epochJulian = JulianDate.fromDate(new Date(Date.UTC(Math.floor(gregorianDate.year / 10) * 10, 0)));
} else if (duration > 86400) { // 1+ day(s) visible, epoch is start of the year.
epochJulian = JulianDate.fromDate(new Date(Date.UTC(gregorianDate.year, 0)));
} else { // Less than a day on timeline, epoch is midnight of the visible day.
epochJulian = JulianDate.fromDate(new Date(Date.UTC(gregorianDate.year, gregorianDate.month, gregorianDate.day)));
}
// startTime: Seconds offset of the left side of the timeline from epochJulian.
var startTime = JulianDate.secondsDifference(this._startJulian, JulianDate.addSeconds(epochJulian, epsilonTime, new JulianDate()));
// endTime: Seconds offset of the right side of the timeline from epochJulian.
var endTime = startTime + duration;
this._epochJulian = epochJulian;
function getStartTic(ticScale) {
return Math.floor(startTime / ticScale) * ticScale;
}
function getNextTic(tic, ticScale) {
return Math.ceil((tic / ticScale) + 0.5) * ticScale;
}
function getAlpha(time) {
return (time - startTime) / duration;
}
function remainder(x, y) {
//return x % y;
return x - (y * Math.round(x / y));
}
// Width in pixels of a typical label, plus padding
this._rulerEle.innerHTML = this.makeLabel(JulianDate.addSeconds(this._endJulian, -minimumDuration, new JulianDate()));
var sampleWidth = this._rulerEle.offsetWidth + 20;
if (sampleWidth < 30) {
// Workaround an apparent IE bug with measuring the width after going full-screen from inside an iframe.
sampleWidth = 180;
}
var origMinSize = minSize;
minSize -= epsilon;
var renderState = {
startTime : startTime,
startJulian : startJulian,
epochJulian : epochJulian,
duration : duration,
timeBarWidth : timeBarWidth,
getAlpha : getAlpha
};
this._highlightRanges.forEach(function(highlightRange) {
tics += highlightRange.render(renderState);
});
// Calculate tic mark label spacing in the TimeBar.
var mainTic = 0.0, subTic = 0.0, tinyTic = 0.0;
// Ideal labeled tic as percentage of zoom interval
var idealTic = sampleWidth / timeBarWidth;
if (idealTic > 1.0) {
// Clamp to width of window, for thin windows.
idealTic = 1.0;
}
// Ideal labeled tic size in seconds
idealTic *= this._timeBarSecondsSpan;
var ticIndex = -1, smallestIndex = -1;
var i, ticScaleLen = timelineTicScales.length;
for (i = 0; i < ticScaleLen; ++i) {
var sc = timelineTicScales[i];
++ticIndex;
mainTic = sc;
// Find acceptable main tic size not smaller than ideal size.
if ((sc > idealTic) && (sc > minSize)) {
break;
}
if ((smallestIndex < 0) && ((timeBarWidth * (sc / this._timeBarSecondsSpan)) >= this.smallestTicInPixels)) {
smallestIndex = ticIndex;
}
}
if (ticIndex > 0) {
while (ticIndex > 0) // Compute sub-tic size that evenly divides main tic.
{
--ticIndex;
if (Math.abs(remainder(mainTic, timelineTicScales[ticIndex])) < 0.00001) {
if (timelineTicScales[ticIndex] >= minSize) {
subTic = timelineTicScales[ticIndex];
}
break;
}
}
if (smallestIndex >= 0) {
while (smallestIndex < ticIndex) // Compute tiny tic size that evenly divides sub-tic.
{
if ((Math.abs(remainder(subTic, timelineTicScales[smallestIndex])) < 0.00001) && (timelineTicScales[smallestIndex] >= minSize)) {
tinyTic = timelineTicScales[smallestIndex];
break;
}
++smallestIndex;
}
}
}
minSize = origMinSize;
if ((minSize > epsilon) && (tinyTic < 0.00001) && (Math.abs(minSize - mainTic) > epsilon)) {
tinyTic = minSize;
if (minSize <= (mainTic + epsilon)) {
subTic = 0.0;
}
}
var lastTextLeft = -999999, textWidth;
if ((timeBarWidth * (tinyTic / this._timeBarSecondsSpan)) >= 3.0) {
for (tic = getStartTic(tinyTic); tic <= endTime; tic = getNextTic(tic, tinyTic)) {
tics += '<span class="cesium-timeline-ticTiny" style="left: ' + Math.round(timeBarWidth * getAlpha(tic)).toString() + 'px;"></span>';
}
}
if ((timeBarWidth * (subTic / this._timeBarSecondsSpan)) >= 3.0) {
for (tic = getStartTic(subTic); tic <= endTime; tic = getNextTic(tic, subTic)) {
tics += '<span class="cesium-timeline-ticSub" style="left: ' + Math.round(timeBarWidth * getAlpha(tic)).toString() + 'px;"></span>';
}
}
if ((timeBarWidth * (mainTic / this._timeBarSecondsSpan)) >= 2.0) {
this._mainTicSpan = mainTic;
endTime += mainTic;
tic = getStartTic(mainTic);
var leapSecond = JulianDate.computeTaiMinusUtc(epochJulian);
while (tic <= endTime) {
var ticTime = JulianDate.addSeconds(startJulian, tic - startTime, new JulianDate());
if (mainTic > 2.1) {
var ticLeap = JulianDate.computeTaiMinusUtc(ticTime);
if (Math.abs(ticLeap - leapSecond) > 0.1) {
tic += (ticLeap - leapSecond);
ticTime = JulianDate.addSeconds(startJulian, tic - startTime, new JulianDate());
}
}
var ticLeft = Math.round(timeBarWidth * getAlpha(tic));
var ticLabel = this.makeLabel(ticTime);
this._rulerEle.innerHTML = ticLabel;
textWidth = this._rulerEle.offsetWidth;
if (textWidth < 10) {
// IE iframe fullscreen sampleWidth workaround, continued.
textWidth = sampleWidth;
}
var labelLeft = ticLeft - ((textWidth / 2) - 1);
if (labelLeft > lastTextLeft) {
lastTextLeft = labelLeft + textWidth + 5;
tics += '<span class="cesium-timeline-ticMain" style="left: ' + ticLeft.toString() + 'px;"></span>' + '<span class="cesium-timeline-ticLabel" style="left: ' + labelLeft.toString() +
'px;">' + ticLabel + '</span>';
} else {
tics += '<span class="cesium-timeline-ticSub" style="left: ' + ticLeft.toString() + 'px;"></span>';
}
tic = getNextTic(tic, mainTic);
}
} else {
this._mainTicSpan = -1;
}
tics += '<span class="cesium-timeline-icon16" style="left:' + scrubX + 'px;bottom:0;background-position: 0 0;"></span>';
timeBar.innerHTML = tics;
this._scrubElement = timeBar.lastChild;
// Clear track canvas.
this._context.clearRect(0, 0, this._trackListEle.width, this._trackListEle.height);
renderState.y = 0;
this._trackList.forEach(function(track) {
track.render(widget._context, renderState);
renderState.y += track.height;
});
};
/**
* @private
*/
Timeline.prototype.updateFromClock = function() {
this._scrubJulian = this._clock.currentTime;
var scrubElement = this._scrubElement;
if (defined(this._scrubElement)) {
var seconds = JulianDate.secondsDifference(this._scrubJulian, this._startJulian);
var xPos = Math.round(seconds * this._topDiv.clientWidth / this._timeBarSecondsSpan);
if (this._lastXPos !== xPos) {
this._lastXPos = xPos;
scrubElement.style.left = (xPos - 8) + 'px';
this._needleEle.style.left = xPos + 'px';
}
}
if (defined(this._timelineDragLocation)) {
this._setTimeBarTime(this._timelineDragLocation, this._timelineDragLocation * this._timeBarSecondsSpan / this._topDiv.clientWidth);
this.zoomTo(JulianDate.addSeconds(this._startJulian, this._timelineDrag, new JulianDate()), JulianDate.addSeconds(this._endJulian, this._timelineDrag, new JulianDate()));
}
};
/**
* @private
*/
Timeline.prototype._setTimeBarTime = function(xPos, seconds) {
xPos = Math.round(xPos);
this._scrubJulian = JulianDate.addSeconds(this._startJulian, seconds, new JulianDate());
if (this._scrubElement) {
var scrubX = xPos - 8;
this._scrubElement.style.left = scrubX.toString() + 'px';
this._needleEle.style.left = xPos.toString() + 'px';
}
var evt = document.createEvent('Event');
evt.initEvent('settime', true, true);
evt.clientX = xPos;
evt.timeSeconds = seconds;
evt.timeJulian = this._scrubJulian;
evt.clock = this._clock;
this._topDiv.dispatchEvent(evt);
};
function createMouseDownCallback(timeline) {
return function(e) {
if (timeline._mouseMode !== timelineMouseMode.touchOnly) {
if (e.button === 0) {
timeline._mouseMode = timelineMouseMode.scrub;
if (timeline._scrubElement) {
timeline._scrubElement.style.backgroundPosition = '-16px 0';
}
timeline._onMouseMove(e);
} else {
timeline._mouseX = e.clientX;
if (e.button === 2) {
timeline._mouseMode = timelineMouseMode.zoom;
} else {
timeline._mouseMode = timelineMouseMode.slide;
}
}
}
e.preventDefault();
};
}
function createMouseUpCallback(timeline) {
return function(e) {
timeline._mouseMode = timelineMouseMode.none;
if (timeline._scrubElement) {
timeline._scrubElement.style.backgroundPosition = '0 0';
}
timeline._timelineDrag = 0;
timeline._timelineDragLocation = undefined;
};
}
function createMouseMoveCallback(timeline) {
return function(e) {
var dx;
if (timeline._mouseMode === timelineMouseMode.scrub) {
e.preventDefault();
var x = e.clientX - timeline._topDiv.getBoundingClientRect().left;
if (x < 0) {
timeline._timelineDragLocation = 0;
timeline._timelineDrag = -0.01 * timeline._timeBarSecondsSpan;
} else if (x > timeline._topDiv.clientWidth) {
timeline._timelineDragLocation = timeline._topDiv.clientWidth;
timeline._timelineDrag = 0.01 * timeline._timeBarSecondsSpan;
} else {
timeline._timelineDragLocation = undefined;
timeline._setTimeBarTime(x, x * timeline._timeBarSecondsSpan / timeline._topDiv.clientWidth);
}
} else if (timeline._mouseMode === timelineMouseMode.slide) {
dx = timeline._mouseX - e.clientX;
timeline._mouseX = e.clientX;
if (dx !== 0) {
var dsec = dx * timeline._timeBarSecondsSpan / timeline._topDiv.clientWidth;
timeline.zoomTo(JulianDate.addSeconds(timeline._startJulian, dsec, new JulianDate()), JulianDate.addSeconds(timeline._endJulian, dsec, new JulianDate()));
}
} else if (timeline._mouseMode === timelineMouseMode.zoom) {
dx = timeline._mouseX - e.clientX;
timeline._mouseX = e.clientX;
if (dx !== 0) {
timeline.zoomFrom(Math.pow(1.01, dx));
}
}
};
}
function createMouseWheelCallback(timeline) {
return function(e) {
var dy = e.wheelDeltaY || e.wheelDelta || (-e.detail);
timelineWheelDelta = Math.max(Math.min(Math.abs(dy), timelineWheelDelta), 1);
dy /= timelineWheelDelta;
timeline.zoomFrom(Math.pow(1.05, -dy));
};
}
function createTouchStartCallback(timeline) {
return function(e) {
var len = e.touches.length, seconds, xPos, leftX = timeline._topDiv.getBoundingClientRect().left;
e.preventDefault();
timeline._mouseMode = timelineMouseMode.touchOnly;
if (len === 1) {
seconds = JulianDate.secondsDifference(timeline._scrubJulian, timeline._startJulian);
xPos = Math.round(seconds * timeline._topDiv.clientWidth / timeline._timeBarSecondsSpan + leftX);
if (Math.abs(e.touches[0].clientX - xPos) < 50) {
timeline._touchMode = timelineTouchMode.scrub;
if (timeline._scrubElement) {
timeline._scrubElement.style.backgroundPosition = (len === 1) ? '-16px 0' : '0 0';
}
} else {
timeline._touchMode = timelineTouchMode.singleTap;
timeline._touchState.centerX = e.touches[0].clientX - leftX;
}
} else if (len === 2) {
timeline._touchMode = timelineTouchMode.slideZoom;
timeline._touchState.centerX = (e.touches[0].clientX + e.touches[1].clientX) * 0.5 - leftX;
timeline._touchState.spanX = Math.abs(e.touches[0].clientX - e.touches[1].clientX);
} else {
timeline._touchMode = timelineTouchMode.ignore;
}
};
}
function createTouchEndCallback(timeline) {
return function(e) {
var len = e.touches.length, leftX = timeline._topDiv.getBoundingClientRect().left;
if (timeline._touchMode === timelineTouchMode.singleTap) {
timeline._touchMode = timelineTouchMode.scrub;
timeline._onTouchMove(e);
} else if (timeline._touchMode === timelineTouchMode.scrub) {
timeline._onTouchMove(e);
}
timeline._mouseMode = timelineMouseMode.touchOnly;
if (len !== 1) {
timeline._touchMode = (len > 0) ? timelineTouchMode.ignore : timelineTouchMode.none;
} else if (timeline._touchMode === timelineTouchMode.slideZoom) {
timeline._touchState.centerX = e.touches[0].clientX - leftX;
}
if (timeline._scrubElement) {
timeline._scrubElement.style.backgroundPosition = '0 0';
}
};
}
function createTouchMoveCallback(timeline) {
return function(e) {
var dx, x, len, newCenter, newSpan, newStartTime, zoom = 1, leftX = timeline._topDiv.getBoundingClientRect().left;
if (timeline._touchMode === timelineTouchMode.singleTap) {
timeline._touchMode = timelineTouchMode.slideZoom;
}
timeline._mouseMode = timelineMouseMode.touchOnly;
if (timeline._touchMode === timelineTouchMode.scrub) {
e.preventDefault();
if (e.changedTouches.length === 1) {
x = e.changedTouches[0].clientX - leftX;
if ((x >= 0) && (x <= timeline._topDiv.clientWidth)) {
timeline._setTimeBarTime(x, x * timeline._timeBarSecondsSpan / timeline._topDiv.clientWidth);
}
}
} else if (timeline._touchMode === timelineTouchMode.slideZoom) {
len = e.touches.length;
if (len === 2) {
newCenter = (e.touches[0].clientX + e.touches[1].clientX) * 0.5 - leftX;
newSpan = Math.abs(e.touches[0].clientX - e.touches[1].clientX);
} else if (len === 1) {
newCenter = e.touches[0].clientX - leftX;
newSpan = 0;
}
if (defined(newCenter)) {
if ((newSpan > 0) && (timeline._touchState.spanX > 0)) {
// Zoom and slide
zoom = (timeline._touchState.spanX / newSpan);
newStartTime = JulianDate.addSeconds(timeline._startJulian, ((timeline._touchState.centerX * timeline._timeBarSecondsSpan) - (newCenter * timeline._timeBarSecondsSpan * zoom)) / timeline._topDiv.clientWidth, new JulianDate());
} else {
// Slide to newCenter
dx = timeline._touchState.centerX - newCenter;
newStartTime = JulianDate.addSeconds(timeline._startJulian, dx * timeline._timeBarSecondsSpan / timeline._topDiv.clientWidth, new JulianDate());
}
timeline.zoomTo(newStartTime, JulianDate.addSeconds(newStartTime, timeline._timeBarSecondsSpan * zoom, new JulianDate()));
timeline._touchState.centerX = newCenter;
timeline._touchState.spanX = newSpan;
}
}
};
}
/**
* Resizes the widget to match the container size.
*/
Timeline.prototype.resize = function() {
var width = this.container.clientWidth;
var height = this.container.clientHeight;
if (width === this._lastWidth && height === this._lastHeight) {
return;
}
this._trackContainer.style.height = height + 'px';
var trackListHeight = 1;
this._trackList.forEach(function(track) {
trackListHeight += track.height;
});
this._trackListEle.style.height = trackListHeight.toString() + 'px';
this._trackListEle.width = this._trackListEle.clientWidth;
this._trackListEle.height = trackListHeight;
this._makeTics();
this._lastXPos = undefined;
this._lastWidth = width;
this._lastHeight = height;
};
return Timeline;
});