NEW: Welcome to the Rhino 6 version of this page! Looking for the older Rhino 5 version?

Select Objects by Layer

Demonstrates how to select all of the objects on a specified layer.

C/C++

CRhinoCommand::result CCommandTest::RunCommand( const CRhinoCommandContext& context )
{
  // Get a reference to the layer table
  CRhinoLayerTable& layer_table = context.m_doc.m_layer_table;
  // Get the current layer
  const CRhinoLayer& current_layer = layer_table.CurrentLayer();

  // Prompt for a layer name
  CRhinoGetString gs;
  gs.SetCommandPrompt( L"Name of layer to select object" );
  gs.SetDefaultString( current_layer.LayerName() );
  gs.AcceptNothing( TRUE );
  gs.GetString();
  if( gs.CommandResult() != CRhinoCommand::success )
    return gs.CommandResult();

  // Validate the string
  ON_wString layer_name = gs.String();
  layer_name.TrimLeftAndRight();
  if( layer_name.IsEmpty() )
    return CRhinoCommand::cancel;

  // Find the layer
  int layer_index = layer_table.FindLayer( layer_name );
  if( layer_index < 0 )
  {
    RhinoApp().Print( L"\"%s\" does not exists.\n", layer_name );
    return CRhinoCommand::cancel;
  }

  // Get the layer
  const CRhinoLayer& layer = layer_table[layer_index];

  // Get all of the objects on the layer
  ON_SimpleArray<CRhinoObject*> obj_list;
  int i, obj_count = context.m_doc.LookupObject( layer, obj_list );

  // Select all of the layer objects
  for( i = 0; i < obj_count; i++ )
  {
    CRhinoObject* obj = obj_list[i];
    if( obj && obj->IsSelectable() )
      obj->Select();
  }

  if( obj_count )
    context.m_doc.Redraw();
  return CRhinoCommand::success;
}