RTL (Right-to-Left) reading order for Old Chinese Books

[lin1270]

I want to render Chinese old books which use rtl mode.
So..how could i do.

[espresso3389]

pdfrx still does not have enough controll for page snapping or such.
But if you want to do horizontal scrolling, see Horizontal Scroll View.

Basically, for R-to-L reading order, you may change the layout logic to run oppsite order.

layoutPages: (pages, params) {
  final height =
      pages.fold(0.0, (prev, page) => max(prev, page.height)) +
          params.margin * 2;
  final width = pages.fold(params.margin * 2, (prev, page) => prev + page.width;
  final pageLayouts = <Rect>[];
  double x = width;
  for (var page in pages) {
    x -= page.width + params.margin;
    pageLayouts.add(
      Rect.fromLTWH(
        x,
        (height - page.height) / 2, // center vertically
        page.width,
        page.height,
      ),
    );
  }
  return PdfPageLayout(
    pageLayouts: pageLayouts,
    documentSize: Size(width, height),
  );
},

Disclaimer: I've not tested the code :(