PreplannedMapArea Class

Member Function Documentation

[explicit] PreplannedMapArea::PreplannedMapArea(Esri::ArcGISRuntime::PortalItem *portalItem, QObject *parent = nullptr)

Constructor that accepts a PortalItem (portalItem) and an optional parent.

Use this constructor to create an offline map area instance with a portal item that is of type map area.

[override virtual noexcept] PreplannedMapArea::~PreplannedMapArea()

Destructor.

Esri::ArcGISRuntime::Geometry PreplannedMapArea::areaOfInterest() const

Returns the area of interest bounding the offline map area.

The area of interest is returned as a Geometry, which can be either an Envelope or a Polygon depending on how the online map was created.

[override virtual] void PreplannedMapArea::cancelLoad()

Reimplements: Loadable::cancelLoad().

See Loadable.

[signal] void PreplannedMapArea::doneLoading(const Esri::ArcGISRuntime::Error &loadError)

Signal emitted when this object is done loading.

• loadError - Details about any error that may have occurred.

See also Loadable and Object.

[override virtual] void PreplannedMapArea::load()

Reimplements: Loadable::load().

See Loadable.

[override virtual] Esri::ArcGISRuntime::Error PreplannedMapArea::loadError() const

Reimplements: Loadable::loadError() const.

See Loadable.

[override virtual] Esri::ArcGISRuntime::LoadStatus PreplannedMapArea::loadStatus() const

Reimplements: Loadable::loadStatus() const.

See Loadable.

[signal] void PreplannedMapArea::loadStatusChanged(Esri::ArcGISRuntime::LoadStatus loadStatus)

Signal emitted when the loadStatus changes for this object.

See also Loadable.

[since Esri::ArcGISRuntime 100.14] Esri::ArcGISRuntime::ImmutablePortalItemListModel *PreplannedMapArea::packageItems() const

Returns the portal items for packages related to this preplanned map area.

When the offline map area has successfully loaded, this collection contains the portal items for the packages (tile packages or geodatabases) holding the offline data for the preplanned map area.

This function was introduced in Esri::ArcGISRuntime 100.14.

[since Esri::ArcGISRuntime 100.9] Esri::ArcGISRuntime::PreplannedPackagingStatus PreplannedMapArea::packagingStatus() const

Returns the publishing status of the online map area.

This property allows you to check whether an online PreplannedMapArea is in a PreplannedPackagingStatus::Complete state and ready to be downloaded.

If you attempt to load a PreplannedMapArea that is not PreplannedPackagingStatus::Complete the PreplannedMapArea will fail to load with an error of ErrorType::CommonIllegalState.

There are four possible values:

• PreplannedPackagingStatus::Complete indicates the map area is ready for download and the data has been packaged.
• PreplannedPackagingStatus::Processing indicates that the online map area is not yet ready to be downloaded. The packages required for the map area have not been packaged yet. This status will be available after the PreplannedMapArea fails to load.
• PreplannedPackagingStatus::Failed indicates that an error was encountered while preparing the online map area or its packages. In this scenario, the map area cannot be downloaded until the web map author has resolved the errors. This status will be available after the PreplannedMapArea fails to load.
• PreplannedPackagingStatus::Unknown indicates that the metadata for the map area has not been fetched. This will be the value when the map area is LoadStatus::NotLoaded.

If the packaging status is PreplannedPackagingStatus::Processing you can check it again following these steps:

• 1. Create a new PortalItem instance using the PortalItem::url in the portalItem.
• 2. Create a new PreplannedMapArea using the portal item PreplannedMapArea(Esri::ArcGISRuntime::PortalItem*, QObject*).
• 3. Load the PreplannedMapArea and check packagingStatus.

This function was introduced in Esri::ArcGISRuntime 100.9.

Esri::ArcGISRuntime::PortalItem *PreplannedMapArea::portalItem() const

Returns the portal item that this offline map area was created from.

[override virtual] void PreplannedMapArea::retryLoad()

Reimplements: Loadable::retryLoad().

See Loadable.

[since Esri::ArcGISRuntime 100.6.0] Esri::ArcGISRuntime::OfflineMapUpdateCapabilities *PreplannedMapArea::updateCapabilities() const

Returns the methods for obtaining updates that are supported for this preplanned map area.

There are two approaches for updating the features in a preplanned offline map area:

• Syncing directly with feature services.
• Downloading scheduled updates (or update packages) from the online map area.

Choose the approach that best suits your workflow, then select the appropriate DownloadPreplannedOfflineMapParameters::updateMode. For more details on how to update an offline map, see the OfflineMapSyncTask.

If OfflineMapUpdateCapabilities::isSupportsSyncWithFeatureServices is true, you can sync directly with feature services. This mode gives you full control over when you upload and download changes. However, performing a download sync places significant load on the backing feature service, so this approach does not scale well for very large deployments. Set the DownloadPreplannedOfflineMapParameters::updateMode to PreplannedUpdateMode::SyncWithFeatureServices to use this approach.

If OfflineMapUpdateCapabilities::isSupportsScheduledUpdatesForFeatures is true, you can download read-only update packages from the online map area. Updates are prepared on a regular schedule and cached for download by all users of the offline map area. Sharing a single set of cached updates, rather than performing individual sync operations, reduces the load on the back-end services. This approach is scalable for large deployments but does not support offline editing. Set the DownloadPreplannedOfflineMapParameters::updateMode to PreplannedUpdateMode::DownloadScheduledUpdates to use this approach.

Note that scheduled updates is an optimization that must be enabled by the web map author when the map area is created.

If both of the above OfflineMapUpdateCapabilities are true, and the feature services in your online map support creating new features, you can adopt a hybrid update model where you download read-only update packages while uploading new features directly to the feature service. This approach combines the scalability of downloading scheduled updates with the ability to collect data in the field. However, note that this approach is strictly add only, meaning that you cannot delete or edit features once they have been uploaded to the feature service. Set the DownloadPreplannedOfflineMapParameters::updateMode to PreplannedUpdateMode::DownloadScheduledUpdatesAndUploadNewFeatures to use this approach.

This property will return nullptr until the offline map area is loaded.

This function was introduced in Esri::ArcGISRuntime 100.6.0.