private bool IsInMemoryLayer(IDatasourceInput layer)
{
return layer != null &&
layer.InputType == Enums.InputType.Layer &&
layer.Datasource is IFeatureSet &&
(layer.Datasource as IFeatureSet).SourceType == FeatureSourceType.InMemory;
}
public InputLayerEventArgs(IDatasourceInput input)
{
if (input == null)
{
throw new ArgumentNullException("layer");
}
Datasource = input;
}
public InputLayerGridAdapter(IDatasourceInput source)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
_source = source;
}
/// <summary>
/// Called when selected layer is changed.
/// </summary>
public void OnLayerChanged(IDatasourceInput input)
{
var vector = input as IVectorInput;
if (vector != null)
{
RebuildFieldList(vector.Datasource);
}
}
/// <summary>
/// Assigns list of fields from particular vector datasource.
/// </summary>
public void OnLayerChanged(IDatasourceInput input)
{
// let the exception be thrown, we are supposed to have only vector datasouce at this stage
_featureSet = (input as IVectorInput).Datasource;
// we can try to preserve the fields that are also present in new datasource
_fields.Clear();
fieldOperationGrid1.DataSource = _fields;
fieldOperationGrid1.UpdateFieldCombo(_featureSet);
RefreshControls();
}
/// <summary>
/// Called when datasource is changed.
/// </summary>
/// <param name="layer">The layer.</param>
public void OnDatasourceChanged(IDatasourceInput layer)
{
_filename = string.Empty;
if (IsInMemoryLayer(layer))
{
_inputFilename = layer.Name;
}
else
{
_inputFilename = layer != null ? layer.Filename : string.Empty;
}
RefreshName();
}
/// <summary>
/// Creates instance of layer input for the specified layer.
/// </summary>
private static IDatasourceInput ReopenLayerInput(ILayer layer, IDatasourceInput oldInput)
{
if (layer == null)
{
return(null);
}
var input = new LayerInput(layer);
var vector = oldInput as IVectorInput;
if (vector != null)
{
input.SelectedOnly = vector.SelectedOnly;
}
return(input);
}
/// <summary>
/// Reopens datasource which served as input for GisTool. The datasource will be searched
/// for among open layers, including in-memory layers and if not present, reoped from the disk.
/// </summary>
private static IDatasourceInput ReopenDatasource(
this DatasourcePointer ds,
IAppContext context,
IDatasourceInput oldInput)
{
int layerHandle = ds.LayerHandle;
if (layerHandle != -1)
{
var layer = context.Layers.ItemByHandle(layerHandle);
return(ReopenLayerInput(layer, oldInput));
}
var identity = ds.LayerIdentity;
if (identity != null)
{
// maybe it opened
var layer = context.Layers.FirstOrDefault(l => l.Identity == identity);
if (layer != null)
{
return(ReopenLayerInput(layer, oldInput));
}
// if not, let's try to open
var source = GeoSource.OpenFromIdentity(identity) as ILayerSource;
if (source != null)
{
return(new DatasourceInput(source));
}
}
return(null);
}
/// <summary>
/// Gets icon index for datasource.
/// </summary>
private int GetImageIndex(IDatasourceInput input)
{
return(LayerIconHelper.GetIcon(input.Datasource));
}
public void OnDatasourceChanged(IDatasourceInput input)
{
// do nothing
}
public InputLayerGridAdapter(string filename)
{
_source = new DatasourceInput(filename);
}
public InputLayerGridAdapter(ILayer layer)
{
_source = new LayerInput(layer);
}
public void OnDatasourceChanged(IDatasourceInput input)
{
_inputFilename = input.Name;
RefreshName();
}
