public bool AddVertex(Point worldPosition)
{
if (EditMode == EditMode.AddPoint)
{
Layer.Add(new Feature {
Geometry = worldPosition
});
}
else if (EditMode == EditMode.AddLine)
{
var firstPoint = worldPosition.Clone();
// Add a second point right away. The second one will be the 'hover' vertex
var secondPoint = worldPosition.Clone();
_addInfo.Vertex = secondPoint;
_addInfo.Feature = new Feature {
Geometry = new LineString(new[] { firstPoint, secondPoint })
};
_addInfo.Vertices = _addInfo.Feature.Geometry.MainVertices();
Layer.Add(_addInfo.Feature);
Layer.DataHasChanged();
EditMode = EditMode.DrawingLine;
}
else if (EditMode == EditMode.DrawingLine)
{
var lineString = (LineString)_addInfo.Feature.Geometry;
// Set the final position of the 'hover' vertex (that was already part of the geometry)
SetPointXY(_addInfo.Vertex, worldPosition.Clone());
_addInfo.Vertex = worldPosition.Clone(); // and create a new hover vertex
lineString.Vertices.Add(_addInfo.Vertex); // and add it to the geometry
_addInfo.Feature.RenderedGeometry?.Clear();
Layer.DataHasChanged();
}
else if (EditMode == EditMode.AddPolygon)
{
var firstPoint = worldPosition.Clone();
// Add a second point right away. The second one will be the 'hover' vertex
var secondPoint = worldPosition.Clone();
_addInfo.Vertex = secondPoint;
_addInfo.Feature = new Feature
{
Geometry = new Polygon
{
ExteriorRing = new LinearRing(new[] { firstPoint, secondPoint })
}
};
_addInfo.Vertices = _addInfo.Feature.Geometry.MainVertices();
Layer.Add(_addInfo.Feature);
Layer.DataHasChanged();
EditMode = EditMode.DrawingPolygon;
}
else if (EditMode == EditMode.DrawingPolygon)
{
var polygon = (Polygon)_addInfo.Feature.Geometry;
// Set the final position of the 'hover' vertex (that was already part of the geometry)
SetPointXY(_addInfo.Vertex, worldPosition.Clone());
_addInfo.Vertex = worldPosition.Clone(); // and create a new hover vertex
polygon.ExteriorRing.Vertices.Add(_addInfo.Vertex); // and add it to the geometry
_addInfo.Feature.RenderedGeometry?.Clear();
Layer.DataHasChanged();
}
return(false);
}
