buildLogPanel method

Implementation

Widget buildLogPanel(
  Widget child, {
  bool showLogPanel = true,
  double? minHeight,
}) {
  if (!showLogPanel) return child;
  return LayoutBuilder(builder: (context, constraints) {
    child = MediaQuery.removePadding(
      context: context,
      removeBottom: true,
      child: child,
    );
    minHeight = minHeight ?? (constraints.maxHeight / 3);
    _maxHeight = _maxHeight ?? minHeight!;
    //Zone.root.print('LayoutBuilder');
    return StatefulBuilder(builder: (context, setState) {
      return Stack(
        children: [
          Positioned(
            top: 0,
            child: AfterLayout(
              callback: (RenderAfterLayout ral) {
                final newMaxLogHeight =
                    constraints.maxHeight - ral.size.height;
                // newMaxLogHeight:274.33333333333326, minHeight:274.3333333333333
                // newMaxLogHeight may less than minHeight a bit.
                if (newMaxLogHeight - minHeight! >= 0 &&
                    _maxHeight != newMaxLogHeight) {
                  setState(() => _maxHeight = newMaxLogHeight);
                }
              },
              child: ConstrainedBox(
                constraints: constraints.copyWith(
                  minHeight: 0,
                  maxHeight: constraints.maxHeight - minHeight!,
                ),
                // 防止绘制阶段调用print显示log而触发重绘导致死循环。
                child: RepaintBoundary(child: child),
              ),
            ),
          ),
          Positioned(
            bottom: 0,
            left: 0,
            right: 0,
            child: RepaintBoundary(
              child: Builder(
                builder: (context) {
                  return MediaQuery.removePadding(
                    removeTop: true,
                    context: context,
                    child: logPanelBuilder(
                      logNotifier,
                      constraints.copyWith(
                        minHeight: minHeight,
                        maxHeight: _maxHeight,
                      ),
                    ),
                  );
                },
              ),
            ),
          ),
        ],
      );
    });
  });
}