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Add similar refPoint validity check to zoomBy

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This commit is contained in:
Jonathan Nielsen 2013-10-04 13:06:25 -06:00
parent fd85ee4f4e
commit ae5acb6547
1 changed files with 1 additions and 1 deletions
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2
src/viewport.js
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@ -536,7 +536,7 @@ $.Viewport.prototype = {
* @return {OpenSeadragon.Viewport} Chainable. * @return {OpenSeadragon.Viewport} Chainable.
*/ */
zoomBy: function( factor, refPoint, immediately ) { zoomBy: function( factor, refPoint, immediately ) {
if( refPoint ) { if (refPoint instanceof $.Point && !isNaN(refPoint.x) && !isNaN(refPoint.y)) {
refPoint = refPoint.rotate( refPoint = refPoint.rotate(
-this.degrees, -this.degrees,
new $.Point( this.centerSpringX.target.value, this.centerSpringY.target.value ) new $.Point( this.centerSpringX.target.value, this.centerSpringY.target.value )