選択したフィーチャから作成したレイヤーの実質範囲を取得

投稿日:2016/9/1 (木) 更新日:

'引数   :IFeatureLayerDefinition  選択したフィーチャから作成したレイヤ
'戻り値 :IEnvelope                実質のレイヤ範囲
Public Function ExtentFromSelectionSet(FeatureLayer As IFeatureLayerDefinition) As IEnvelope
    Dim pFeatureLayer As IFeatureLayer
    Set pFeatureLayer = FeatureLayer
     
    Dim pSelectionSet As ISelectionSet
    Set pSelectionSet = FeatureLayer.DefinitionSelectionSet
     
    '選択したフィーチャから作成したレイヤでなければ引数のFeatureLayer範囲を返す
    If pSelectionSet Is Nothing Then
        Set ExtentFromSelectionSet = pFeatureLayer.AreaOfInterest
        Exit Function
    End If
     
    Dim pEnumGeometry As IEnumGeometry
    Set pEnumGeometry = New EnumFeatureGeometry
     
    Dim EnumGeometryBind As IEnumGeometryBind
    Set EnumGeometryBind = pEnumGeometry
     
    EnumGeometryBind.BindGeometrySource Nothing, pSelectionSet
     
    Dim pGeomFactory As IGeometryFactory
    Set pGeomFactory = New GeometryEnvironment
     
    Dim pGeometry As IGeometry
    Set pGeometry = pGeomFactory.CreateGeometryFromEnumerator(pEnumGeometry)
     
    Set ExtentFromSelectionSet = pGeometry.Envelope
 
End Function

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