///<summary> This gets called when when the user runs this command.</summary>
public override IRhinoCommand.result RunCommand(IRhinoCommandContext context)
{
// Prompt for the instance (block) name
MRhinoGetString gs = new MRhinoGetString();
gs.SetCommandPrompt("Name of block to delete");
gs.GetString();
if (gs.CommandResult() != IRhinoCommand.result.success)
{
return(gs.CommandResult());
}
string idef_name = gs.String().Trim();
if (string.IsNullOrEmpty(idef_name))
{
return(IRhinoCommand.result.nothing);
}
// Find the instance definition by name
int idef_index = context.m_doc.m_instance_definition_table.FindInstanceDefinition(idef_name, true);
if (idef_index < 0 || idef_index >= context.m_doc.m_instance_definition_table.InstanceDefinitionCount())
{
RhUtil.RhinoApp().Print(string.Format("Block definition \"{0}\" not found.\n", idef_name));
return(IRhinoCommand.result.nothing);
}
// Verify the instance definition can be deleted
IRhinoInstanceDefinition idef = context.m_doc.m_instance_definition_table[idef_index];
if (idef.IsReference())
{
RhUtil.RhinoApp().Print(string.Format("Block definition \"{0}\" is from a reference file.\n", idef_name));
return(IRhinoCommand.result.nothing);
}
// Get all of instance references
IRhinoInstanceObject[] iref_object_list = null;
int iref_count = idef.GetReferences(out iref_object_list);
// Try deleting the instance references
int num_deleted = 0;
for (int i = 0; i < iref_count; i++)
{
IRhinoInstanceObject iref = iref_object_list[i];
if (null == iref)
{
continue;
}
if (iref.IsDeleted() || iref.IsReference())
{
continue;
}
MRhinoObjRef obj_ref = new MRhinoObjRef(iref_object_list[i]);
if (context.m_doc.DeleteObject(obj_ref, true))
{
num_deleted++;
}
}
if (num_deleted > 0)
{
context.m_doc.Redraw();
}
RhUtil.RhinoApp().Print(string.Format("{0} \"{1}\" block(s) found, {2} deleted.\n", iref_count, idef_name, num_deleted));
// Try deleting the instance definition
bool iref_deleted = false;
if (num_deleted == iref_count)
{
if (context.m_doc.m_instance_definition_table.DeleteInstanceDefinition(idef_index, true, false))
{
iref_deleted = true;
}
}
if (iref_deleted)
{
RhUtil.RhinoApp().Print(string.Format("Block definition \"{0}\" deleted.\n", idef_name));
}
else
{
RhUtil.RhinoApp().Print(string.Format("Block definition \"{0}\" not deleted.\n", idef_name));
}
return(IRhinoCommand.result.success);
}