getPreferredRect method

Rect getPreferredRect(RenderBox parentBox, SfSliderThemeData themeData, Offset offset, { bool? isActive, })

Returns the size based on the values passed to it.

Implementation

Rect getPreferredRect(
  RenderBox parentBox,
  SfSliderThemeData themeData,
  Offset offset, {
  bool? isActive,
}) {
  final Size overlayPreferredSize = (parentBox as RenderBaseSlider)
      .overlayShape
      .getPreferredSize(themeData);
  final Size thumbPreferredSize = parentBox.thumbShape.getPreferredSize(
    themeData,
  );
  final Size tickPreferredSize = parentBox.tickShape.getPreferredSize(
    themeData,
  );
  double maxRadius;
  if (_isVertical(parentBox)) {
    maxRadius = math.max(
      overlayPreferredSize.height / 2,
      math.max(thumbPreferredSize.height / 2, tickPreferredSize.height / 2),
    );
  } else {
    maxRadius = math.max(
      overlayPreferredSize.width / 2,
      math.max(thumbPreferredSize.width / 2, tickPreferredSize.width / 2),
    );
  }
  final double maxTrackHeight = math.max(
    themeData.activeTrackHeight,
    themeData.inactiveTrackHeight,
  );
  // ignore: avoid_as
  if (_isVertical(parentBox)) {
    double left = offset.dx;
    if (isActive != null) {
      left +=
          isActive
              ? (maxTrackHeight - themeData.activeTrackHeight) / 2
              : (maxTrackHeight - themeData.inactiveTrackHeight) / 2;
    }
    final double right =
        left +
        (isActive == null
            ? maxTrackHeight
            : (isActive
                ? themeData.activeTrackHeight
                : themeData.inactiveTrackHeight));
    final double top = offset.dy + maxRadius;
    final double bottom = top + parentBox.size.height - (2 * maxRadius);
    return Rect.fromLTRB(
      math.min(left, right),
      top,
      math.max(left, right),
      bottom,
    );
  } else {
    final double left = offset.dx + maxRadius;
    double top = offset.dy;
    if (isActive != null) {
      top +=
          isActive
              ? (maxTrackHeight - themeData.activeTrackHeight) / 2
              : (maxTrackHeight - themeData.inactiveTrackHeight) / 2;
    }
    final double right = left + parentBox.size.width - (2 * maxRadius);
    final double bottom =
        top +
        (isActive == null
            ? maxTrackHeight
            : (isActive
                ? themeData.activeTrackHeight
                : themeData.inactiveTrackHeight));
    return Rect.fromLTRB(
      math.min(left, right),
      top,
      math.max(left, right),
      bottom,
    );
  }
}