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Add documentation for opacity-change and composite-operation-change

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- Add early exit to setOpacity/setCompositeOperation when new value is
   the same as current
This commit is contained in:
Sean Nichols 2017-05-30 14:52:45 -04:00
parent 035f35a26a
commit 1fb25f3e41
1 changed files with 34 additions and 2 deletions
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36
src/tiledimage.js
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@ -774,9 +774,25 @@ $.extend($.TiledImage.prototype, $.EventSource.prototype, /** @lends OpenSeadrag
* @fires OpenSeadragon.TiledImage.event:opacity-change
*/
setOpacity: function(opacity) {
if (opacity === this.opacity) {
return;
}
this.opacity = opacity;
this._needsDraw = true;
this.raiseEvent('opacity-change');
/**
* Raised when the TiledImage's opacity is changed.
* @event opacity-change
* @memberOf OpenSeadragon.TiledImage
* @type {object}
* @property {Number} opacity - The new opacity value.
* @property {OpenSeadragon.TiledImage} eventSource - A reference to the
* TiledImage which raised the event.
* @property {?Object} userData - Arbitrary subscriber-defined object.
*/
this.raiseEvent('opacity-change', {
opacity: this.opacity
});
},
/**
@ -833,9 +849,25 @@ $.extend($.TiledImage.prototype, $.EventSource.prototype, /** @lends OpenSeadrag
* @fires OpenSeadragon.TiledImage.event:composite-operation-change
*/
setCompositeOperation: function(compositeOperation) {
if (compositeOperation === this.compositeOperation) {
return;
}
this.compositeOperation = compositeOperation;
this._needsDraw = true;
this.raiseEvent('composite-operation-change');
/**
* Raised when the TiledImage's opacity is changed.
* @event composite-operation-change
* @memberOf OpenSeadragon.TiledImage
* @type {object}
* @property {String} compositeOperation - The new compositeOperation value.
* @property {OpenSeadragon.TiledImage} eventSource - A reference to the
* TiledImage which raised the event.
* @property {?Object} userData - Arbitrary subscriber-defined object.
*/
this.raiseEvent('composite-operation-change', {
compositeOperation: this.compositeOperation
});
},
// private