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Add tile-unloaded event.

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This commit is contained in:
Antoine Vandecreme 2015-06-11 13:18:17 -04:00
parent 584daea732
commit 8a6177b729
1 changed files with 23 additions and 3 deletions
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26
src/tilecache.js
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@ -172,6 +172,7 @@ $.TileCache.prototype = /** @lends OpenSeadragon.TileCache.prototype */{
if ( this._imagesLoadedCount > this._maxImageCacheCount ) {
var worstTile = null;
var worstTileIndex = -1;
var worstTileRecord = null;
var prevTile, worstTime, worstLevel, prevTime, prevLevel, prevTileRecord;
for ( var i = this._tilesLoaded.length - 1; i >= 0; i-- ) {
@ -183,6 +184,7 @@ $.TileCache.prototype = /** @lends OpenSeadragon.TileCache.prototype */{
} else if ( !worstTile ) {
worstTile = prevTile;
worstTileIndex = i;
worstTileRecord = prevTileRecord;
continue;
}
@ -195,11 +197,12 @@ $.TileCache.prototype = /** @lends OpenSeadragon.TileCache.prototype */{
( prevTime == worstTime && prevLevel > worstLevel ) ) {
worstTile = prevTile;
worstTileIndex = i;
worstTileRecord = prevTileRecord;
}
}
if ( worstTile && worstTileIndex >= 0 ) {
this._unloadTile(worstTile);
this._unloadTile(worstTileRecord);
insertionIndex = worstTileIndex;
}
}
@ -234,8 +237,11 @@ $.TileCache.prototype = /** @lends OpenSeadragon.TileCache.prototype */{
},
// private
_unloadTile: function(tile) {
$.console.assert(tile, '[TileCache._unloadTile] tile is required');
_unloadTile: function(tileRecord) {
$.console.assert(tileRecord, '[TileCache._unloadTile] tileRecord is required');
var tile = tileRecord.tile;
var tiledImage = tileRecord.tiledImage;
tile.unload();
tile.cacheImageRecord = null;
@ -246,6 +252,20 @@ $.TileCache.prototype = /** @lends OpenSeadragon.TileCache.prototype */{
delete this._imagesLoaded[tile.url];
this._imagesLoadedCount--;
}
/**
* Triggered when a tile has just been unloaded from memory.
*
* @event tile-unloaded
* @memberof OpenSeadragon.Viewer
* @type {object}
* @property {OpenSeadragon.TiledImage} tiledImage - The tiled image of the unloaded tile.
* @property {OpenSeadragon.Tile} tile - The tile which has been unloaded.
*/
tiledImage.viewer.raiseEvent("tile-unloaded", {
tile: tile,
tiledImage: tiledImage
});
}
};