get-constraints

get-constraints Function

Summary

Returns the external constraints for an element.

Package

capi

Signature

get-constraints element => min-width, min-height, max-width, max-height

Arguments

element⇩

An instance of simple-pane (or one of its subclasses), or an instance of pinboard-object (or one of its subclasses).

Values

`min-width`, `min-height`	Integers specifying the minimum external dimensions of `element`.
`max-width`, `max-height`	Integers specifying the maximum external dimensions of `element`.

Description

The function get-constraints returns the external constraints for element as multiple values.

The values are the minimum width, the minimum height, the maximum width and the maximum height of the element including borders. A containing layout will use these values when laying out its children.

get-constraints calls the generic function calculate-constraints to calculate these sizes initially, but then just uses the values in the geometry cache for the element. To force an element to take account of its new constraints, call the function invalidate-pane-constraints.