focusNodesById method

Implementation

/// This method is used to focus the viweport on a set of nodes by their IDs.
///
/// The method calculates the encompassing rectangle of the nodes and then
/// centers the viewport on the center of the rectangle. The method also
/// calculates the zoom level required to fit all the nodes in the viewport.
///
/// See [calculateEncompassingRect], [selectNodesById], [setViewportOffset], and [setViewportZoom] for more information.
void focusNodesById(Set<String> ids) {
  final encompassingRect = calculateEncompassingRect(
    ids,
    nodes,
    margin: 256,
  );

  selectNodesById(ids, holdSelection: false);

  final nodeEditorSize = getSizeFromGlobalKey(kNodeEditorWidgetKey)!;

  setViewportOffset(
    -encompassingRect.center,
    animate: true,
    absolute: true,
  );

  final fitZoom = min(
    nodeEditorSize.width / encompassingRect.width,
    nodeEditorSize.height / encompassingRect.height,
  );

  setViewportZoom(fitZoom, animate: true);
}