paintDecoration method

void paintDecoration(Canvas canvas, Rect rect, { TextDirection? textDirection, })

Implementation

void paintDecoration(
  Canvas canvas,
  Rect rect, {
  TextDirection? textDirection,
}) {
  final innerPath = getInnerPath(rect, textDirection: textDirection);

  // Draw background
  if (backgroundGradient != null) {
    final Paint backgroundPaint = Paint()
      ..shader = backgroundGradient!.createShader(rect);
    canvas.drawPath(innerPath, backgroundPaint);
  }

  // Draw inner shadow
  if (innerShadow.isNotEmpty) {
    canvas.save();
    final outerPath = getOuterPath(rect, textDirection: textDirection);
    canvas.clipPath(outerPath);

    for (final BoxShadow boxShadow in innerShadow) {
      final Paint paint = boxShadow is GradientShadow
          ? boxShadow.toPaintRect(rect, textDirection: textDirection)
          : boxShadow.toPaint();
      final Rect bounds =
          rect.shift(boxShadow.offset).deflate(boxShadow.spreadRadius);
      final outerPath = getOuterPath(bounds, textDirection: textDirection)
        ..addRect(
          bounds.inflate(
            boxShadow.blurRadius +
                boxShadow.spreadRadius +
                max(boxShadow.offset.dx, boxShadow.offset.dy),
          ),
        )
        ..fillType = PathFillType.evenOdd;
      canvas.drawPath(outerPath, paint);
    }
    canvas.restore();
  }

  if (shadow.isNotEmpty) {
    // Clip inner
    if (clipInner) {
      double maxSpreadDistance = 0;
      for (final BoxShadow boxShadow in shadow) {
        final curSpreadDistane = (boxShadow.blurRadius +
                boxShadow.spreadRadius +
                max(boxShadow.offset.dx, boxShadow.offset.dy)) *
            2;
        maxSpreadDistance = max(maxSpreadDistance, curSpreadDistane);
      }

      if (maxSpreadDistance > 0) {
        final clipPath = Path()
          // ..addRect(const Rect.fromLTWH(-1000, -1000, 2000, 2000))
          ..addRect(rect.inflate(maxSpreadDistance))
          ..addPath(innerPath, Offset.zero)
          ..fillType = PathFillType.evenOdd;
        canvas.clipPath(clipPath);
      }
    }

    // Draw shadow
    for (final BoxShadow boxShadow in shadow) {
      final Paint paint = boxShadow is GradientShadow
          ? boxShadow.toPaintRect(rect, textDirection: textDirection)
          : boxShadow.toPaint();
      final Rect bounds =
          rect.shift(boxShadow.offset).inflate(boxShadow.spreadRadius);
      canvas.drawPath(
        getOuterPath(bounds, textDirection: textDirection),
        paint,
      );
    }
  }
}