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Fix lazy UTFGrid loading

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This commit is contained in:
Andreas Hocevar
2019-11-26 17:33:05 +01:00
parent 7c4c4c47ec
commit 79074d31c1
1 changed files with 7 additions and 4 deletions
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11
src/ol/source/UTFGrid.js
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@@ -143,7 +143,8 @@ export class CustomTile extends Tile {
* The tile data is requested if not yet loaded. * The tile data is requested if not yet loaded.
*/ */
forDataAtCoordinate(coordinate, callback, opt_request) { forDataAtCoordinate(coordinate, callback, opt_request) {
if (this.state == TileState.IDLE && opt_request === true) { if (this.state == TileState.EMPTY && opt_request === true) {
this.state = TileState.IDLE;
listenOnce(this, EventType.CHANGE, function(e) { listenOnce(this, EventType.CHANGE, function(e) {
callback(this.getData(coordinate)); callback(this.getData(coordinate));
}, this); }, this);
@@ -248,6 +249,8 @@ export class CustomTile extends Tile {
load() { load() {
if (this.preemptive_) { if (this.preemptive_) {
this.loadInternal_(); this.loadInternal_();
} else {
this.setState(TileState.EMPTY);
} }
} }
} }
@@ -258,9 +261,9 @@ export class CustomTile extends Tile {
* @property {boolean} [preemptive=true] * @property {boolean} [preemptive=true]
* If `true` the UTFGrid source loads the tiles based on their "visibility". * If `true` the UTFGrid source loads the tiles based on their "visibility".
* This improves the speed of response, but increases traffic. * This improves the speed of response, but increases traffic.
* Note that if set to `false`, you need to pass `true` as `opt_request` * Note that if set to `false` (lazy loading), you need to pass `true` as
* to the `forDataAtCoordinateAndResolution` method otherwise no data * `opt_request` to the `forDataAtCoordinateAndResolution` method otherwise no
* will ever be loaded. * data will ever be loaded.
* @property {boolean} [jsonp=false] Use JSONP with callback to load the TileJSON. * @property {boolean} [jsonp=false] Use JSONP with callback to load the TileJSON.
* Useful when the server does not support CORS.. * Useful when the server does not support CORS..
* @property {import("./TileJSON.js").Config} [tileJSON] TileJSON configuration for this source. * @property {import("./TileJSON.js").Config} [tileJSON] TileJSON configuration for this source.