private void UnloadLayer(IEntityDesignerLayer layer)
{
if (_artifact != null &&
_artifact.ConceptualModel() != null)
{
layer.OnBeforeLayerUnloaded(_artifact.ConceptualModel().XObject);
}
foreach (var command in GetCommands(layer))
{
RemoveCommand(command);
}
layer.ChangeEntityDesignerSelection -= layer_EntityDesignerSelectionChanged;
if (_selectionContainer != null)
{
_selectionContainer.Dispose();
_selectionContainer = null;
}
}
private void LoadLayer(IEntityDesignerLayer layer, XObject selectedXObject)
{
if (_artifact != null &&
_artifact.ConceptualModel() != null)
{
if (selectedXObject != null)
{
layer.OnAfterLayerLoaded(selectedXObject);
}
else
{
layer.OnAfterLayerLoaded(_artifact.ConceptualModel().XObject);
}
}
if (layer.ServiceProvider != null &&
PackageManager.Package.DocumentFrameMgr != null &&
PackageManager.Package.DocumentFrameMgr.EditingContextManager != null)
{
if (PackageManager.Package.DocumentFrameMgr.EditingContextManager.DoesContextExist(_artifact.Uri))
{
var editingContext = PackageManager.Package.DocumentFrameMgr.EditingContextManager.GetNewOrExistingContext(
_artifact.Uri);
Debug.Assert(editingContext != null, "EditingContext must not be null if we found that a context exists");
if (editingContext != null)
{
// TODO there should be one independent selection container for each layer.
_selectionContainer = new EntityDesignSelectionContainer <LayerSelection>(layer.ServiceProvider, editingContext);
}
}
}
layer.ChangeEntityDesignerSelection += layer_EntityDesignerSelectionChanged;
foreach (var command in GetCommands(layer))
{
AddCommand(command);
}
}
