Add GetDefaultEditorState to App CustomEvents

public/smartcomponent/svg-layout-designer.ts

@@ -4,6 +4,7 @@
      */
     type IHistoryState = SVGLD.IHistoryState;
     type IEditorState = SVGLD.IEditorState;
+    type IConfiguration = SVGLD.IConfiguration;
 
     export class SVGLayoutDesigner extends Components.ComponentBase {
 
@@ -178,6 +179,20 @@
             const component = this.GetAppComponent();
             component.dispatchEvent(new CustomEvent(eventType, { detail: history }));
         }
+
+        /**
+         * Construct a default EditorState from a given configuration.
+         * This is the same method used when loading the editor
+         * for the first time after fetch the configuration from the API.
+         * @param configuration History to revive
+         * @param callback Callback with the revived state
+         */
+        public GetDefaultEditorState(configuration: IConfiguration, callback: (state: IEditorState) => void) {
+            const eventType = 'getDefaultEditorState';
+            this.app.AddEventListener(eventType, callback);
+            const component = this.GetAppComponent();
+            component.dispatchEvent(new CustomEvent(eventType, { detail: configuration }));
+        }
     }