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Added zoomInvert option to reverse the order in which zooms are numbered.

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This commit is contained in:
Majiir Paktu 2011-12-23 12:56:56 -05:00
parent ff81ea14f7
commit 1f45ef7348
1 changed files with 11 additions and 2 deletions
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13
src/layer/tile/TileLayer.js
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@ -17,6 +17,7 @@ L.TileLayer = L.Class.extend({
continuousWorld: false,
noWrap: false,
zoomOffset: 0,
zoomReverse: false,
unloadInvisibleTiles: L.Browser.mobile,
updateWhenIdle: L.Browser.mobile
@ -209,7 +210,7 @@ L.TileLayer = L.Class.extend({
var tilePos = this._getTilePos(tilePoint),
zoom = this._map.getZoom(),
key = tilePoint.x + ':' + tilePoint.y,
tileLimit = Math.pow(2, (zoom + this.options.zoomOffset));
tileLimit = Math.pow(2, this._getOffsetZoom(zoom));
// wrap tile coordinates
if (!this.options.continuousWorld) {
@ -240,6 +241,14 @@ L.TileLayer = L.Class.extend({
container.appendChild(tile);
},
_getOffsetZoom: function(zoom) {
if (this.options.zoomReverse) {
return (this.options.maxZoom - zoom) + this.options.zoomOffset;
} else {
return zoom + this.options.zoomOffset;
}
},
_getTilePos: function (tilePoint) {
var origin = this._map.getPixelOrigin(),
@ -256,7 +265,7 @@ L.TileLayer = L.Class.extend({
return L.Util.template(this._url, L.Util.extend({
s: s,
z: zoom + this.options.zoomOffset,
z: this._getOffsetZoom(zoom),
x: tilePoint.x,
y: tilePoint.y
}, this._urlParams));