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With tileQueue, we need a different way of handling loadstart/loadend.

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This commit is contained in:
ahocevar
2012-03-17 16:10:10 +01:00
parent de9716564f
commit 99f116ee98
1 changed files with 10 additions and 2 deletions
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12
lib/OpenLayers/Layer/Grid.js
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@@ -138,6 +138,12 @@ OpenLayers.Layer.Grid = OpenLayers.Class(OpenLayers.Layer.HTTPRequest, {
*/
tileQueue: null,
/**
* Property: loading
* {Boolean} Indicates if tiles are being loaded.
*/
loading: false,
/**
* Property: backBuffer
* {DOMElement} The back buffer.
@@ -1050,7 +1056,8 @@ OpenLayers.Layer.Grid = OpenLayers.Class(OpenLayers.Layer.HTTPRequest, {
tile.onLoadStart = function() {
//if that was first tile then trigger a 'loadstart' on the layer
if (this.numLoadingTiles == 0) {
if (this.loading === false) {
this.loading = true;
this.events.triggerEvent("loadstart");
}
this.events.triggerEvent("tileloadstart", {tile: tile});
@@ -1061,7 +1068,8 @@ OpenLayers.Layer.Grid = OpenLayers.Class(OpenLayers.Layer.HTTPRequest, {
this.numLoadingTiles--;
this.events.triggerEvent("tileloaded", {tile: tile});
//if that was the last tile, then trigger a 'loadend' on the layer
if (this.numLoadingTiles === 0) {
if (this.tileQueue.length === 0 && this.numLoadingTiles === 0) {
this.loading = false;
this.events.triggerEvent("loadend");
if(this.backBuffer) {
// the removal of the back buffer is delayed to prevent flash