The generic function ```
calculate-constraints
```

calculates the minimum and maximum size for *
pane*
according to the sizes of its children, and sets these values into *
pane*
's geometry cache.

The CAPI calls ```
calculate-constraints
```

for each pane and layout that it displays.

When creating your own layout, you should define a method for ```
calculate-constraints
```

that sets the values of the following geometry slots based on the constraints of its children.

The minimum width of pane.

The maximum width of pane.

The minimum height of pane.

The maximum height of pane.

(See with-geometry.)

The constraints of any CAPI element can be found by calling get-constraints.

LispWorks CAPI Reference Manual - 21 Dec 2009