IntrinsicWidth class

A widget that sizes its child to the child's maximum intrinsic width.

This class is useful, for example, when unlimited width is available and you would like a child that would otherwise attempt to expand infinitely to instead size itself to a more reasonable width.

The constraints that this widget passes to its child will adhere to the parent's constraints, so if the constraints are not large enough to satisfy the child's maximum intrinsic width, then the child will get less width than it otherwise would. Likewise, if the minimum width constraint is larger than the child's maximum intrinsic width, the child will be given more width than it otherwise would.

If stepWidth is non-null, the child's width will be snapped to a multiple of the stepWidth. Similarly, if stepHeight is non-null, the child's height will be snapped to a multiple of the stepHeight.

This class is relatively expensive, because it adds a speculative layout pass before the final layout phase. Avoid using it where possible. In the worst case, this widget can result in a layout that is O(N²) in the depth of the tree.

See also:

• Align, a widget that aligns its child within itself. This can be used to loosen the constraints passed to the RenderIntrinsicWidth, allowing the RenderIntrinsicWidth's child to be smaller than that of its parent.
• Row, which when used with CrossAxisAlignment.stretch can be used to loosen just the width constraints that are passed to the RenderIntrinsicWidth, allowing the RenderIntrinsicWidth's child's width to be smaller than that of its parent.
• The catalog of layout widgets.