createOverlayEntries method

@override Iterable<OverlayEntry> createOverlayEntries()

Creates the overlay entries for this route.

Subclasses must implement this to define what layers the route contributes to the overlay stack.

Implementation

@override
Iterable<OverlayEntry> createOverlayEntries() {
  return [
    // Barrier entry
    _createBarrierEntry(),
    // Content entry
    OverlayEntry(
      opaque: false,
      maintainState: true,
      builder: (context) {
        Widget content = builder(context);

        // Apply size constraints if specified.
        if (width != null || height != null) {
          content = SizedBox(width: width, height: height, child: content);
        }

        return Align(alignment: alignment, child: content);
      },
    ),
  ];
}