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Timeline autoPan implemented #897

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Timeline autoPan implemented #897

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17e4dcf
autoPan implemented
raviagrwl420 Jul 10, 2013
7917f19
Bugs resolved
raviagrwl420 Jul 11, 2013
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37 changes: 36 additions & 1 deletion Source/Widgets/Timeline/Timeline.js
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Original file line number Diff line number Diff line change
Expand Up @@ -102,6 +102,8 @@ define([
this._timeBarSecondsSpan = undefined;
this._clock = clock;
this._scrubJulian = clock.currentTime;
this._lastJulian = clock.currentTime;
this._autoPan = 0;
this._mainTicSpan = -1;
this._mouseMode = timelineMouseMode.none;
this._touchMode = timelineTouchMode.none;
Expand Down Expand Up @@ -484,8 +486,41 @@ define([
this._scrubJulian = this._clock.currentTime;
var scrubElement = this._scrubElement;
if (typeof this._scrubElement !== 'undefined') {
var width = this._topDiv.clientWidth;
var seconds = this._startJulian.getSecondsDifference(this._scrubJulian);
var xPos = Math.round(seconds * this._topDiv.clientWidth / this._timeBarSecondsSpan);
var xPos = Math.round(seconds * width / this._timeBarSecondsSpan);
var drift = 2 * this._lastJulian.getSecondsDifference(this._scrubJulian);
var leftMargin = width / 6;
var rightMargin = 5 * width / 6;

if (this._lastXPos < 0 || this._lastXPos > width) {
seconds = this._startJulian.getSecondsDifference(this._scrubJulian);
this.zoomTo(this._startJulian.addSeconds(seconds), this._endJulian.addSeconds(seconds));
}

if ((this._lastXPos < leftMargin && this._autoPan === 1) || (this._lastXPos > rightMargin && this._autoPan === -1)) {
this._autoPan = 0;
} else if ((this._autoPan === -1 && this._clock.multiplier > 0) || (this._autoPan === 1 && this._clock.multiplier < 0)) {
this._autoPan = 0;
} else if (this._clock.shouldAnimate === true) {
if (xPos < leftMargin && this._clock.multiplier < 0) {
this._autoPan = -1;
} else if (xPos > rightMargin && this._clock.multiplier > 0) {
this._autoPan = 1;
}
} else {
this._autoPan = 0;
}

if (this._autoPan !== 0) {
if ((this._lastXPos > 3 * width / 8) && (this._lastXPos < 5 * width / 8 )) {
drift /= 2;
}
this.zoomTo(this._startJulian.addSeconds(drift), this._endJulian.addSeconds(drift));
seconds = this._startJulian.getSecondsDifference(this._scrubJulian);
xPos = Math.round(seconds * width / this._timeBarSecondsSpan);
}
this._lastJulian = this._clock.currentTime;

if (this._lastXPos !== xPos) {
this._lastXPos = xPos;
Expand Down