Sortix cross-volatile manual

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NAME

hide_panel, show_panel, panel_hidden — visibility of panels

LIBRARY

library “libpanel”

SYNOPSIS

#include <panel.h>

int
hide_panel(PANEL *p);

int
show_panel(PANEL *p);

int
panel_hidden(PANEL *p);

DESCRIPTION

Panels are initially created visible. The function hide_panel() can be used to hide a panel. The panel is removed from the deck.

A panel can be made visible again with a call to show_panel(). The panel is returned to the top of the deck.

The current visibility status of a panel can be queried with panel_hidden().

IMPLEMENTATION NOTES

The show_panel() function will return an error if the panel is already visible. Use top_panel(3) to change z-order of an already visible panel. This is the behaviour specified by the original AT&T System V UNIX panel library.

In the ncurses implementation of the panel library show_panel() and top_panel() are identical and handle both visible and hidden panels. This may be a source of bugs in programs tested only against ncurses.

RETURN VALUES

The panel_hidden() function returns TRUE or FALSE. It will return ERR if passed a null pointer.

Other functions will return one of the following values: