IfcDoc.CtlProperties.buttonAttributeType_Click C# (CSharp) Method

        private void buttonAttributeType_Click(object sender, EventArgs e)
        {
            using (FormSelectEntity form = new FormSelectEntity(null, null, this.m_project, SelectDefinitionOptions.Entity | SelectDefinitionOptions.Type))
            {
                if (form.ShowDialog(this) == DialogResult.OK && form.SelectedEntity != null)
                {
                    // find existing type or reference type in schema
                    DocSchema docSchema = (DocSchema)this.m_path[1];
                    DocDefinition docDef = docSchema.GetDefinition(form.SelectedEntity.Name);
                    if (docDef == null)
                    {
                        // generate link to schema
                        foreach(DocSection docSection in this.m_project.Sections)
                        {
                            foreach (DocSchema docOtherSchema in docSection.Schemas)
                            {
                                docDef = docOtherSchema.GetDefinition(form.SelectedEntity.Name);
                                if (docDef is DocType || docDef is DocEntity)
                                {
                                    DocSchemaRef docSchemaReference = null;
                                    foreach(DocSchemaRef docSchemaRef in docSchema.SchemaRefs)
                                    {
                                        if (String.Equals(docSchemaRef.Name, docOtherSchema.Name, StringComparison.OrdinalIgnoreCase))
                                        {
                                            docSchemaReference = docSchemaRef;
                                            break;
                                        }
                                    }

                                    if (docSchemaReference == null)
                                    {
                                        docSchemaReference = new DocSchemaRef();
                                        docSchemaReference.Name = docOtherSchema.Name;
                                        docSchema.SchemaRefs.Add(docSchemaReference);
                                    }

                                    docDef = new DocDefinitionRef();
                                    docDef.Name = form.SelectedEntity.Name;
                                    docSchemaReference.Definitions.Add((DocDefinitionRef)docDef);

                                    break;
                                }
                            }

                            if (docDef != null)
                                break;
                        }
                    }

                    if (this.m_target is DocAttribute)
                    {
                        DocAttribute docAttr = (DocAttribute)this.m_target;

                        if (docAttr.Definition != null && docAttr.Definition.DiagramRectangle != null)
                        {
                            // find page target, make page reference
                            if(docDef is DocDefinitionRef)
                            {
                                DocDefinitionRef ddr = (DocDefinitionRef)docDef;

                                // find existing page target
                                foreach(DocPageTarget docPageTarget in docSchema.PageTargets)
                                {
                                    if(docPageTarget.Definition == ddr)
                                    {
                                        // found it -- make page source
                                        DocPageSource docPageSource = new DocPageSource();
                                        docPageTarget.Sources.Add(docPageSource);
                                        docDef = docPageSource;
                                        break;
                                    }
                                }
                            }

                            if (docDef.DiagramRectangle == null)
                            {
                                docDef.DiagramRectangle = new DocRectangle();
                                docDef.DiagramNumber = docAttr.Definition.DiagramNumber;
                                docDef.DiagramRectangle.X = docAttr.Definition.DiagramRectangle.X;
                                docDef.DiagramRectangle.Y = docAttr.Definition.DiagramRectangle.Y;
                                docDef.DiagramRectangle.Width = docAttr.Definition.DiagramRectangle.Width;
                                docDef.DiagramRectangle.Height = docAttr.Definition.DiagramRectangle.Height;
                            }
                        }

                        docAttr.Definition = docDef;
                        docAttr.DefinedType = form.SelectedEntity.Name;
                        this.textBoxAttributeType.Text = docAttr.DefinedType;
                    }
                    else if(this.m_target is DocDefined)
                    {
                        DocDefined docDefined = (DocDefined)this.m_target;
                        if (docDefined.Definition.DiagramRectangle != null)
                        {
                            docDef.DiagramRectangle = new DocRectangle();
                            docDef.DiagramNumber = docDefined.Definition.DiagramNumber;
                            docDef.DiagramRectangle.X = docDefined.Definition.DiagramRectangle.X;
                            docDef.DiagramRectangle.Y = docDefined.Definition.DiagramRectangle.Y;
                            docDef.DiagramRectangle.Width = docDefined.Definition.DiagramRectangle.Width;
                            docDef.DiagramRectangle.Height = docDefined.Definition.DiagramRectangle.Height;
                        }

                        docDefined.Definition = docDef;
                        docDefined.DefinedType = form.SelectedEntity.Name;
                        this.textBoxAttributeType.Text = docDefined.DefinedType;
                    }
                }
            }
        }