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Option to reuse tiles instead of creating and destroying them continuously

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This commit is contained in:
Morten Ditlevsen 2012-02-02 09:34:55 +01:00
parent 090eae607b
commit de740148a0
1 changed files with 25 additions and 3 deletions
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28
src/layer/tile/TileLayer.js
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@ -17,6 +17,7 @@ L.TileLayer = L.Class.extend({
continuousWorld: false,
noWrap: false,
zoomOffset: 0,
reuseTiles: false,
unloadInvisibleTiles: L.Browser.mobile,
updateWhenIdle: L.Browser.mobile
@ -125,6 +126,10 @@ L.TileLayer = L.Class.extend({
}
this._tiles = {};
if (this.options.reuseTiles) {
this._unusedTiles = [];
}
if (clearOldContainer && this._container) {
this._container.innerHTML = "";
}
@ -145,7 +150,8 @@ L.TileLayer = L.Class.extend({
this._addTilesFromCenterOut(tileBounds);
if (this.options.unloadInvisibleTiles) {
if (this.options.unloadInvisibleTiles ||
this.options.reuseTiles) {
this._removeOtherTiles(tileBounds);
}
},
@ -199,6 +205,9 @@ L.TileLayer = L.Class.extend({
if (tile.parentNode === this._container) {
this._container.removeChild(tile);
}
if (this.options.reuseTiles) {
this._unusedTiles.push(this._tiles[key]);
}
delete this._tiles[key];
}
}
@ -226,8 +235,8 @@ L.TileLayer = L.Class.extend({
}
}
// create tile
var tile = this._createTile();
// get unused tile - or create a new tile
var tile = this._getTile();
L.DomUtil.setPosition(tile, tilePos);
this._tiles[key] = tile;
@ -271,6 +280,19 @@ L.TileLayer = L.Class.extend({
this._tileImg.style.height = tileSize + 'px';
},
_getTile: function () {
if (this.options.reuseTiles && this._unusedTiles.length > 0) {
var tile = this._unusedTiles.pop();
this._resetTile(tile);
return tile;
}
return this._createTile();
},
_resetTile: function (tile) {
// Override if data stored on a tile needs to be cleaned up before reuse
},
_createTile: function () {
var tile = this._tileImg.cloneNode(false);
tile.onselectstart = tile.onmousemove = L.Util.falseFn;