definev / widget_canvas Goto Github PK

There is a problem that I encountered in the last update. When I want to move the widgets with the mouse, both the screen and the widget move, and at the same time, the widget moves much faster than the screen and goes out of the mouse's range. It may be useful to review and edit the constantly updated values ​​of the widgets in the x and y plane.

Subclasses of RenderTwoDimensionalViewport will typically use firstChild to traverse children in a standard paint order that follows row or column major ordering. so we can customize the paint order. like this.

  @override
  void paint(PaintingContext context, Offset offset) {
    // Paint as wish
    var item = _visibleElements!.removeAt(0);
    _visibleElements!.add(item);

    for (final element in _visibleElements!) {
      if (getChildFor(element.vicinity) case final child?) {
        context.paintChild(child, parentDataOf(child).layoutOffset! + offset);
      }
    }
  }

Hi there! super work. Thank you for keeping it as open-source. I saw your post on Twitter. it seems very performant and also better than InteractiveViewer. It would be great if it could support scaling too. then it would be a perfect replacement for the InteractiveViewer. been trying to do this on my own by using a fork but it is maybe a little complicated for me.