Function

Summary

The predicate for whether the interface containing a pane is visible.

Package

capi

Signature

interface-visible-p pane => visiblep

Arguments

pane

A CAPI pane.

Values

visiblep

A boolean.

Description

The function interface-visible-p returns nil if

1. pane is not associated with any interface, or
2. pane is associated with an interface which is not displayed, or
3. pane is associated with an interface which is minimized or iconified, or
4. pane is known to be fully obscured by other windows. This can happen on Motif, but is not detected on Microsoft Windows.

An error is signalled if pane is not a CAPI pane (that is, it is not an instance of a subclass of element, collection or pinboard-object).

Otherwise interface-visible-p returns t.

Notes

On Microsoft Windows, interface-visible-p may return t even though the interface is entirely obscured by another window.