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[AppStudio for ArcGIS] Disable cache on a WebTiledLayer

JorgeFrade_Martínez

When i perform a zoom if i dont have tiles for that area, the upper level tiles was shown instead of disappear...

How i can disable that feature?

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ErwinSoekianto

Jorge,

I don't see any property or method to disable cache on the WebTiledLayer documentation of ArcGIS Runtime SDK for Qt/QML.

I am including ArcGIS Runtime SDK for Qt‌ to see anyone in this group know the answer to this.

Thank you,

Erwin

LucasDanzinger

I don't have good data to test if this works or not, but can you try setting the noDataTileBehavior property (inherited from ImageTiledLayer) to Enums.NoDataTileBehaviorBlank - https://developers.arcgis.com/qt/latest/qml/api-reference/enums-nodatatilebehavior.html

JorgeFrade_Martínez

Lucas Danzinger I have the same behavior with every one of the enum options.

There you have a good data to test it. (attached)

A greeting!

topofire.7z.zip

LucasDanzinger

Can you share your code please?

JorgeFrade_Martínez

WebTiledLayer{
   visible: map.layerVisibilityOfflineTopoFire;
   templateUrl: AppFramework.userHomeFolder.filePath("ArcGIS/AppStudio/Data/MyMarvelousApp/") + "/topofire/{level}/{col}/{row}.jpg;

   noDataTileBehavior: Enums.NoDataTileBehaviorBlank;

LucasDanzinger

Hi Jorge-

It seems like the no data behavior is not working on WebTiledLayer. This seems like a bug. As a workaround, could you try implementing a custom basemap with ServiceImageTiledLayer instead? It is more code but very customizable and works as you describe your requirements:

<SPAN class="comment token">// add a mapView component</SPAN>
MapView <SPAN class="punctuation token">{</SPAN>
    anchors<SPAN class="punctuation token">.</SPAN>fill<SPAN class="punctuation token">:</SPAN> parent
    <SPAN class="comment token">// set focus to enable keyboard navigation</SPAN>
    focus<SPAN class="punctuation token">:</SPAN> <SPAN class="keyword token">true</SPAN>

    <SPAN class="comment token">// add a map to the mapview</SPAN>
    Map <SPAN class="punctuation token">{</SPAN>
        Basemap <SPAN class="punctuation token">{</SPAN>
            id<SPAN class="punctuation token">:</SPAN> basemapOSM

            ServiceImageTiledLayer <SPAN class="punctuation token">{</SPAN>
                noDataTileBehavior<SPAN class="punctuation token">:</SPAN> Enums<SPAN class="punctuation token">.</SPAN>NoDataTileBehaviorBlank

                fullExtent<SPAN class="punctuation token">:</SPAN> Envelope <SPAN class="punctuation token">{</SPAN>
                    spatialReference<SPAN class="punctuation token">:</SPAN> SpatialReference <SPAN class="punctuation token">{</SPAN> wkid<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">3857</SPAN> <SPAN class="punctuation token">}</SPAN>
                    xMin<SPAN class="punctuation token">:</SPAN> <SPAN class="operator token">-</SPAN><SPAN class="number token">20037508.342789244</SPAN>
                    xMax<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">20037285.703807656</SPAN>
                    yMin<SPAN class="punctuation token">:</SPAN> <SPAN class="operator token">-</SPAN><SPAN class="number token">20037471.205137063</SPAN>
                    yMax<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">20037471.205137063</SPAN>
                <SPAN class="punctuation token">}</SPAN>

                tileInfo<SPAN class="punctuation token">:</SPAN> declaredTileInfo

                <SPAN class="comment token">// use callback function to request tiles</SPAN>
                tileUrlCallback<SPAN class="punctuation token">:</SPAN> <SPAN class="keyword token">function</SPAN><SPAN class="punctuation token">(</SPAN>level<SPAN class="punctuation token">,</SPAN> row<SPAN class="punctuation token">,</SPAN> col<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
                    <SPAN class="keyword token">var</SPAN> requestUrl <SPAN class="operator token">=</SPAN> <SPAN class="string token">"/Users/luca6804/Downloads/topofire/topofire/"</SPAN> <SPAN class="operator token">+</SPAN> level <SPAN class="operator token">+</SPAN><SPAN class="string token">"/"</SPAN> <SPAN class="operator token">+</SPAN> col <SPAN class="operator token">+</SPAN> <SPAN class="string token">"/"</SPAN> <SPAN class="operator token">+</SPAN> row <SPAN class="operator token">+</SPAN> <SPAN class="string token">".jpg"</SPAN><SPAN class="punctuation token">;</SPAN>
                    <SPAN class="keyword token">return</SPAN> requestUrl<SPAN class="punctuation token">;</SPAN>
                <SPAN class="punctuation token">}</SPAN>
            <SPAN class="punctuation token">}</SPAN>
        <SPAN class="punctuation token">}</SPAN>
    <SPAN class="punctuation token">}</SPAN>
<SPAN class="punctuation token">}</SPAN>


TileInfo <SPAN class="punctuation token">{</SPAN>
    id<SPAN class="punctuation token">:</SPAN> declaredTileInfo
    dpi<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">96</SPAN>
    format<SPAN class="punctuation token">:</SPAN> Enums<SPAN class="punctuation token">.</SPAN>TileImageFormatPNG
    origin<SPAN class="punctuation token">:</SPAN> Point <SPAN class="punctuation token">{</SPAN>
        spatialReference<SPAN class="punctuation token">:</SPAN>  SpatialReference <SPAN class="punctuation token">{</SPAN> wkid<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">3857</SPAN> <SPAN class="punctuation token">}</SPAN>
        x<SPAN class="punctuation token">:</SPAN> <SPAN class="operator token">-</SPAN><SPAN class="number token">20037508.342789244</SPAN>
        y<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">20037508.368847027</SPAN>
    <SPAN class="punctuation token">}</SPAN>
    spatialReference<SPAN class="punctuation token">:</SPAN> SpatialReference <SPAN class="punctuation token">{</SPAN> wkid<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">3857</SPAN> <SPAN class="punctuation token">}</SPAN>
    tileHeight<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">256</SPAN>
    tileWidth<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">256</SPAN>

    LevelOfDetail <SPAN class="punctuation token">{</SPAN>
        level<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">0</SPAN>
        scale<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">591657527.591555</SPAN>
        resolution<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">56543.03392800014</SPAN>
    <SPAN class="punctuation token">}</SPAN>
    LevelOfDetail <SPAN class="punctuation token">{</SPAN>
        level<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">1</SPAN>
        scale<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">295828763.795777</SPAN>
        resolution<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">78271.51696399994</SPAN>
    <SPAN class="punctuation token">}</SPAN>
    LevelOfDetail <SPAN class="punctuation token">{</SPAN>
        level<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">2</SPAN>
        scale<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">147914381.897889</SPAN>
        resolution<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">39135.75848200009</SPAN>
    <SPAN class="punctuation token">}</SPAN>
    LevelOfDetail <SPAN class="punctuation token">{</SPAN>
        level<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">3</SPAN>
        scale<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">73957190.948944</SPAN>
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        resolution<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">4891.96981024998</SPAN>
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    LevelOfDetail <SPAN class="punctuation token">{</SPAN>
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8-AdvancedEditing.png

JorgeFrade_Martínez

Can you try this on a SceneView?
It seems that this dosent work at all, at least for me.

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