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Merge pull request #715 from LarissaSmith/master

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Added autoRefigureSizes flag for disabling calls to _figureSizes …
This commit is contained in:
Ian Gilman 2015-09-15 10:22:35 -07:00
commit 4ac34b1190
1 changed files with 25 additions and 1 deletions
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24
src/world.js
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@ -52,8 +52,14 @@ $.World = function( options ) {
this.viewer = options.viewer;
this._items = [];
this._needsDraw = false;
this._autoRefigureSizes = true;
this._needsSizesFigured = false;
this._delegatedFigureSizes = function(event) {
if (_this._autoRefigureSizes) {
_this._figureSizes();
} else {
_this._needsSizesFigured = true;
}
};
this._figureSizes();
@ -275,6 +281,21 @@ $.extend( $.World.prototype, $.EventSource.prototype, /** @lends OpenSeadragon.W
return this._contentFactor;
},
/**
* As a performance optimization, setting this flag to false allows the bounds-change event handler
* on tiledImages to skip calculations on the world bounds. If a lot of images are going to be positioned in
* rapid succession, this is a good idea. When finished, setAutoRefigureSizes should be called with true
* or the system may behave oddly.
* @param {Boolean} [value] The value to which to set the flag.
*/
setAutoRefigureSizes: function(value) {
this._autoRefigureSizes = value;
if (value & this._needsSizesFigured) {
this._figureSizes();
this._needsSizesFigured = false;
}
},
/**
* Arranges all of the TiledImages with the specified settings.
* @param {Object} options - Specifies how to arrange.
@ -304,6 +325,8 @@ $.extend( $.World.prototype, $.EventSource.prototype, /** @lends OpenSeadragon.W
var x = 0;
var y = 0;
var item, box, width, height, position;
this.setAutoRefigureSizes(false);
for (var i = 0; i < this._items.length; i++) {
if (i && (i % wrap) === 0) {
if (layout === 'horizontal') {
@ -336,6 +359,7 @@ $.extend( $.World.prototype, $.EventSource.prototype, /** @lends OpenSeadragon.W
y += increment;
}
}
this.setAutoRefigureSizes(true);
},
// private