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ArcGISRuntimeSDKQt_CppSamples/EditData/SnapGeometryEdits/README.md

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+# Snap geometry edits
+
+Use the Geometry Editor to edit a geometry and align it to existing geometries on a map.
+
+![](screenshot.png)
+
+## Use case
+
+A field worker can create new features by editing and snapping the vertices of a geometry to existing features on a map. In a water distribution network, service line features can be represented with the polyline geometry type. By snapping the vertices of a proposed service line to existing features in the network, an exact footprint can be identified to show the path of the service line and what features in the network it connects to. The feature layer containing the service lines can then be accurately modified to include the proposed line.
+
+## How to use the sample
+
+To create a geometry, press the create button to choose the geometry type you want to create (i.e. points, multipoints, polyline, or polygon) and interactively tap and drag on the map view to create the geometry.
+
+To configure snapping, press the snap settings button to enable or disable snapping and choose which layers to snap to.
+
+To interactively snap a vertex, ensure that snapping is enabled and move the mouse pointer or drag a vertex to nearby an existing feature. When the pointer is close to a feature, the edit position will be adjusted to coincide with (or snap to), edges and vertices of that feature. Click or release the touch pointer to place the vertex at the snapped location.
+
+To edit a geometry, tap the geometry to be edited in the map to select it and then edit the geometry by tapping and dragging its vertices and snapping them to nearby features.
+
+To undo changes made to the geometry, press the undo button.
+
+To delete a geometry or a vertex, tap the geometry or vertex to select it and then press the delete button.
+
+To save your edits, press the save button.
+
+## How it works
+
+1. Create a `Map` from the `URL` and connect it to the `MapView`.
+2. Set the map's `LoadSettings.featureTilingMode` to `enabledWithFullResolutionWhenSupported`.
+3. Create a `GeometryEditor` and connect it to the map view.
+4. Call `syncSourceSettings` after the map's operational layers are loaded and the geometry editor connected to the map view.
+5. Set `SnapSettings.isEnabled` and `SnapSourceSettings.isEnabled` to true for the `SnapSource` of interest.
+6. Start the geometry editor with a `GeometryType`.
+
+## Relevant API
+
+* FeatureLayer
+* Geometry
+* GeometryEditor
+* GeometryEditorStyle
+* MapView
+* SnapSettings
+* SnapSource
+* SnapSourceSettings
+
+## About the data
+
+The [Naperville water distribution network](https://www.arcgis.com/home/item.html?id=b95fe18073bc4f7788f0375af2bb445e) is based on ArcGIS Solutions for Water Utilities and provides a realistic depiction of a theoretical stormwater network.
+
+## Additional information
+
+Snapping is used to maintain data integrity between different sources of data when editing, so it is important that each `SnapSource` provides full resolution geometries to be valid for snapping. This means that some of the default optimizations used to improve the efficiency of data transfer and display of polygon and polyline layers based on feature services are not appropriate for use with snapping.
+
+To snap to polygon and polyline layers, the recommended approach is to set the `FeatureLayer`'s feature tiling mode to `FeatureTilingMode.enabledWithFullResolutionWhenSupported` and use the default `ServiceFeatureTable` feature request mode `FeatureRequestMode.onInteractionCache`. Local data sources, such as geodatabases, always provide full resolution geometries. Point and multipoint feature layers are also always full resolution.
+
+For SDKs which added enhanced feedback at 200.3 (Java, QT, .NET, Swift): Snapping can be used during interactive edits that move existing vertices using the `VertexTool`. It is also supported for adding new vertices for input devices with a hover event (such as a mouse move without a mouse button press). Using the magnifier to perform a vertex move allows users of touch devices to clearly see the visual cues for snapping.
+
+For SDKs which did not add enhanced feedback yet (Kotlin): Snapping can be used during interactive edits that move existing vertices using the `VertexTool`. Using the magnifier to perform the vertex move allows users of touch devices to clearly see the visual cues for snapping.
+
+## Tags
+
+edit, feature, geometry editor, layers, map, snapping

ArcGISRuntimeSDKQt_CppSamples/EditData/SnapGeometryEdits/README.metadata.json

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+{
+    "category": "Edit data",
+    "description": "Use the Geometry Editor to edit a geometry and align it to existing geometries on a map.",
+    "featured": false,
+    "ignore": false,
+    "images": [
+        "screenshot.png"
+    ],
+    "keywords": [
+        "edit",
+        "feature",
+        "geometry editor",
+        "layers",
+        "map",
+        "snapping"
+    ],
+    "redirect_from": "",
+    "relevant_apis": [
+        "FeatureLayer",
+        "Geometry",
+        "GeometryEditor",
+        "GeometryEditorStyle",
+        "MapView",
+        "SnapSettings",
+        "SnapSource",
+        "SnapSourceSettings"
+    ],
+    "snippets": [
+        "SnapGeometryEdits.cpp",
+        "SnapGeometryEdits.h",
+        "GeometryEditorButton.qml",
+        "SnapGeometryEdits.qml"
+    ],
+    "title": "Snap geometry edits"
+}