PANEL_ABOVE(3)

PANEL_ABOVE(3) | Library Functions Manual | PANEL_ABOVE(3)

# NAME

`top_panel`, `bottom_panel`, `panel_above`, `panel_below` —
z-order of panels

# LIBRARY

Z-order for curses windows (libpanel, -lpanel)

# SYNOPSIS

`#include <panel.h>`

int
`top_panel`(PANEL *p);

int
`bottom_panel`(PANEL *p);

PANEL *
`panel_above`(PANEL *p);

PANEL *
`panel_below`(PANEL *p);

# DESCRIPTION

Newly created panels are placed at the top of the deck. The z-order of a visible panel can be changed with the functions `top_panel`() and `bottom_panel`() that move it to the top and bottom of the deck respectively.

For a visible panel its neighbors in the deck can be obtained with `panel_above`() and `panel_below`(). The bottom and top panels can be obtained by passing a `NULL` argument to `panel_above`() and `panel_below`(), respectively.

# IMPLEMENTATION NOTES

The `top_panel`() function will return an error if the panel is currently hidden. Use show_panel(3) to make a hidden panel visible again and put it at the top of the deck. 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

Functions returning pointers will return `NULL` if an error is detected. The functions that return an int will return one of the following values:

`OK`
  The function completed successfully.
`ERR`
  An error occurred in the function.

# SEE ALSO

panel(3)

October 28, 2015 | NetBSD 9.0