///// <summary>
///// snapping specific for a tool. Called before layer specific snappping is applied.
///// </summary>
///// <param name="sourceLayer"></param>
///// <param name="snapSource"></param>
///// <param name="worldPos"></param>
///// <param name="Envelope"></param>
///// <returns></returns>
public void Snap(ILayer sourceLayer, IGeometry snapSource, ICoordinate worldPos, IEnvelope Envelope)
{
SnapResult = null;
IFeature sourceFeature = MapControl.SelectTool.FeatureEditors[0].SourceFeature;
if (sourceFeature.Geometry != snapSource)
return;
SnapRole snapRole = SnapRole.FreeAtObject;
if ((Control.ModifierKeys & Keys.Control) == Keys.Control)
snapRole = SnapRole.Free;
ISnapRule snapRule = new SnapRule
{
SourceLayer = sourceLayer,
TargetLayer = sourceLayer,
Obligatory = true,
SnapRole = snapRole,
PixelGravity = 4
};
SnapResult = MapControl.SnapTool.ExecuteSnapRule(
snapRule,
sourceFeature,
sourceFeature.Geometry,
new List<IFeature>
{
sourceFeature
},
worldPos,
-1);
}
public void SnapToLineStringUsingFreeAtObject()
{
MockRepository mockRepository = new MockRepository();
IFeature feature = mockRepository.CreateMock<IFeature>();
using (mockRepository.Record())
{
Expect.Call(feature.Geometry).Return(lineString).Repeat.Any();
}
using (mockRepository.Playback())
{
VectorLayer lineStringLayer = new VectorLayer
{
DataSource = new FeatureCollection
{
Features = new List<IFeature> { feature }
}
};
IPoint snapSource = new Point(5, 5);
SnapRule snapRule = new SnapRule
{
TargetLayer = lineStringLayer,
SnapRole = SnapRole.FreeAtObject,
Obligatory = true,
PixelGravity = 40
};
ISnapResult snapResults = snapRule.Execute(null, snapSource, null,
snapSource.Coordinates[0],
CreateEnvelope(snapSource, 10),
0);
Assert.IsNotNull(snapResults);
Assert.IsNotNull(snapResults.Location);
Assert.AreEqual(0, snapResults.Location.Y);
Assert.AreEqual(5, snapResults.Location.X);
}
}
