10000 [Example] Remove layer before adding layer if layer is added in place source example by Chaoba · Pull Request #766 · flutter-mapbox-gl/maps · GitHub
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[Example] Remove layer before adding layer if layer is added in place source example #766

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Merged
merged 2 commits into from
Nov 20, 2021
Merged

[Example] Remove layer before adding layer if layer is added in place source example #766

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[Example] Remove layer before adding layer if layer is added in place…
Nov 16, 2021
8cda007
Apply setState to change layerAdded value
Nov 17, 2021
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100 changes: 52 additions & 48 deletions example/lib/place_source.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,7 @@ class PlaceSymbolBodyState extends State<PlaceSymbolBody> {
static const LAYER_ID = 'sydney_layer';

bool sourceAdded = false;
bool layerAdded = false;
late MapboxMapController controller;

void _onMapCreated(MapboxMapController controller) {
Expand Down Expand Up @@ -68,16 +69,24 @@ class PlaceSymbolBodyState extends State<PlaceSymbolBody> {
}

Future<void> addLayer(String imageLayerId, String imageSourceId) {
if(layerAdded) {
removeLayer(imageLayerId);
}
setState(() => layerAdded = true);
return controller.addImageLayer(imageLayerId, imageSourceId);
}

Future<void> addLayerBelow(
String imageLayerId, String imageSourceId, String belowLayerId) {
return controller.addImageLayerBelow(
imageLayerId, imageSourceId, belowLayerId);
if(layerAdded) {
removeLayer(imageLayerId);
}
setState(() => layerAdded = true);
return controller.addImageLayerBelow(imageLayerId, imageSourceId, belowLayerId);
}

Future<void> removeLayer(String imageLayerId) {
setState(() => layerAdded = false);
return controller.removeLayer(imageLayerId);
}

Expand Down Expand Up @@ -106,55 +115,50 @@ class PlaceSymbolBodyState extends State<PlaceSymbolBody> {
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
Row(
Column(
children: <Widget>[
Column(
children: <Widget>[
TextButton(
child: const Text('Add source (asset image)'),
onPressed: sourceAdded
? null
: () {
addImageSourceFromAsset(
SOURCE_ID, 'assets/sydney.png')
.then((value) {
setState(() => sourceAdded = true);
});
},
),
TextButton(
child: const Text('Remove source (asset image)'),
onPressed: sourceAdded
? () async {
await removeLayer(LAYER_ID);
removeImageSource(SOURCE_ID).then((value) {
setState(() => sourceAdded = false);
});
}
: null,
),
TextButton(
child: const Text('Show layer'),
onPressed: sourceAdded
? () => addLayer(LAYER_ID, SOURCE_ID)
: null,
),
TextButton(
child: const Text('Show layer below water'),
onPressed: sourceAdded
? () =>
addLayerBelow(LAYER_ID, SOURCE_ID, 'water')
: null,
),
TextButton(
child: const Text('Hide layer'),
onPressed:
sourceAdded ? () => removeLayer(LAYER_ID) : null,
),
],
TextButton(
child: const Text('Add source (asset image)'),
onPressed: sourceAdded
? null
: () {
addImageSourceFromAsset(
SOURCE_ID, 'assets/sydney.png')
.then((value) {
setState(() => sourceAdded = true);
});
},
),
TextButton(
child: const Text('Remove source (asset image)'),
onPressed: sourceAdded
? () async {
await removeLayer(LAYER_ID);
removeImageSource(SOURCE_ID).then((value) {
setState(() => sourceAdded = false);
});
}
: null,
),
TextButton(
child: const Text('Show layer'),
onPressed: sourceAdded
? () => addLayer(LAYER_ID, SOURCE_ID)
: null,
),
TextButton(
child: const Text('Show layer below water'),
onPressed: sourceAdded
? () => addLayerBelow(LAYER_ID, SOURCE_ID, 'water')
: null,
),
TextButton(
child: const Text('Hide layer'),
onPressed:
sourceAdded ? () => removeLayer(LAYER_ID) : null,
),
],
)
),
],
),
),
Expand Down
0