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+<!--
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- * Copyright (c) 1998-2018,2019 Free Software Foundation, Inc. *
+ * Copyright 2018-2019,2020 Thomas E. Dickey *
+ * Copyright 1998-2010,2017 Free Software Foundation, Inc. *
* *
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- * @Id: menu_driver.3x,v 1.25 2019/01/20 20:32:23 tom Exp @
+ * @Id: menu_driver.3x,v 1.28 2020/12/19 21:33:37 tom Exp @
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-<H1 class="no-header">menu_driver 3x</H1>
+<H1 class="no-header">menu_driver 3X</H1>
<PRE>
-<STRONG><A HREF="menu_driver.3x.html">menu_driver(3x)</A></STRONG> <STRONG><A HREF="menu_driver.3x.html">menu_driver(3x)</A></STRONG>
+<B><A HREF="menu_driver.3X.html">menu_driver(3X)</A></B> <B><A HREF="menu_driver.3X.html">menu_driver(3X)</A></B>
</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
- <STRONG>menu_driver</STRONG> - command-processing loop of the menu system
+ <B>menu_driver</B> - command-processing loop of the menu system
</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
- <STRONG>#include</STRONG> <STRONG><menu.h></STRONG>
- int menu_driver(MENU *menu, int c);
+ <B>#include</B> <B><menu.h></B>
+
+ <B>int</B> <B>menu_driver(MENU</B> <B>*</B><I>menu</I><B>,</B> <B>int</B> <I>c</I><B>);</B>
</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
Once a menu has been posted (displayed), you should funnel input events
- to it through <STRONG>menu_driver</STRONG>. This routine has three major input cases:
+ to it through <B>menu_driver</B>. This routine has three major input cases:
- <STRONG>o</STRONG> The input is a form navigation request. Navigation request codes
- are constants defined in <STRONG><form.h></STRONG>, which are distinct from the key-
- and character codes returned by <STRONG><A HREF="curs_getch.3x.html">wgetch(3x)</A></STRONG>.
+ <B>o</B> The input is a form navigation request. Navigation request codes
+ are constants defined in <B><form.h></B>, which are distinct from the key-
+ and character codes returned by <B><A HREF="curs_getch.3X.html">wgetch(3X)</A></B>.
- <STRONG>o</STRONG> The input is a printable character. Printable characters (which
- must be positive, less than 256) are checked according to the pro-
- gram's locale settings.
+ <B>o</B> The input is a printable character. Printable characters (which
+ must be positive, less than 256) are checked according to the
+ program's locale settings.
- <STRONG>o</STRONG> The input is the KEY_MOUSE special key associated with an mouse
+ <B>o</B> The input is the KEY_MOUSE special key associated with an mouse
event.
The menu driver requests are as follows:
If the second argument is a printable character, the code appends it to
the pattern buffer and attempts to move to the next item matching the
- new pattern. If there is no such match, <STRONG>menu_driver</STRONG> returns <STRONG>E_NO_MATCH</STRONG>
+ new pattern. If there is no such match, <B>menu_driver</B> returns <B>E_NO_MATCH</B>
and deletes the appended character from the buffer.
If the second argument is one of the above pre-defined requests, the
If you click above the display region of the menu:
- <STRONG>o</STRONG> a REQ_SCR_ULINE is generated for a single click,
+ <B>o</B> a REQ_SCR_ULINE is generated for a single click,
- <STRONG>o</STRONG> a REQ_SCR_UPAGE is generated for a double-click and
+ <B>o</B> a REQ_SCR_UPAGE is generated for a double-click and
- <STRONG>o</STRONG> a REQ_FIRST_ITEM is generated for a triple-click.
+ <B>o</B> a REQ_FIRST_ITEM is generated for a triple-click.
If you click below the display region of the menu:
- <STRONG>o</STRONG> a REQ_SCR_DLINE is generated for a single click,
+ <B>o</B> a REQ_SCR_DLINE is generated for a single click,
- <STRONG>o</STRONG> a REQ_SCR_DPAGE is generated for a double-click and
+ <B>o</B> a REQ_SCR_DPAGE is generated for a double-click and
- <STRONG>o</STRONG> a REQ_LAST_ITEM is generated for a triple-click.
+ <B>o</B> a REQ_LAST_ITEM is generated for a triple-click.
If you click at an item inside the display area of the menu:
- <STRONG>o</STRONG> the menu cursor is positioned to that item.
+ <B>o</B> the menu cursor is positioned to that item.
- <STRONG>o</STRONG> If you double-click an item a REQ_TOGGLE_ITEM is generated and
- <STRONG>E_UNKNOWN_COMMAND</STRONG> is returned. This return value makes sense,
+ <B>o</B> If you double-click an item a REQ_TOGGLE_ITEM is generated and
+ <B>E_UNKNOWN_COMMAND</B> is returned. This return value makes sense,
because a double click usually means that an item-specific action
should be returned. It is exactly the purpose of this return value
to signal that an application specific command should be executed.
- <STRONG>o</STRONG> If a translation into a request was done, <STRONG>menu_driver</STRONG> returns the
+ <B>o</B> If a translation into a request was done, <B>menu_driver</B> returns the
result of this request.
If you clicked outside the user window or the mouse event could not be
- translated into a menu request an <STRONG>E_REQUEST_DENIED</STRONG> is returned.
+ translated into a menu request an <B>E_REQUEST_DENIED</B> is returned.
</PRE><H3><a name="h3-APPLICATION-DEFINED-COMMANDS">APPLICATION-DEFINED COMMANDS</a></H3><PRE>
If the second argument is neither printable nor one of the above pre-
- defined menu requests or KEY_MOUSE, the drive assumes it is an applica-
- tion-specific command and returns <STRONG>E_UNKNOWN_COMMAND</STRONG>. Application-
- defined commands should be defined relative to <STRONG>MAX_COMMAND</STRONG>, the maximum
- value of these pre-defined requests.
+ defined menu requests or KEY_MOUSE, the drive assumes it is an
+ application-specific command and returns <B>E_UNKNOWN_COMMAND</B>.
+ Application-defined commands should be defined relative to <B>MAX_COMMAND</B>,
+ the maximum value of these pre-defined requests.
</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
- <STRONG>menu_driver</STRONG> return one of the following error codes:
+ <B>menu_driver</B> return one of the following error codes:
- <STRONG>E_OK</STRONG> The routine succeeded.
+ <B>E_OK</B> The routine succeeded.
- <STRONG>E_SYSTEM_ERROR</STRONG>
- System error occurred (see <STRONG>errno(3)</STRONG>).
+ <B>E_SYSTEM_ERROR</B>
+ System error occurred (see <B>errno(3)</B>).
- <STRONG>E_BAD_ARGUMENT</STRONG>
+ <B>E_BAD_ARGUMENT</B>
Routine detected an incorrect or out-of-range argument.
- <STRONG>E_BAD_STATE</STRONG>
+ <B>E_BAD_STATE</B>
Routine was called from an initialization or termination function.
- <STRONG>E_NOT_POSTED</STRONG>
+ <B>E_NOT_POSTED</B>
The menu has not been posted.
- <STRONG>E_UNKNOWN_COMMAND</STRONG>
+ <B>E_UNKNOWN_COMMAND</B>
The menu driver code saw an unknown request code.
- <STRONG>E_NO_MATCH</STRONG>
+ <B>E_NO_MATCH</B>
Character failed to match.
- <STRONG>E_REQUEST_DENIED</STRONG>
+ <B>E_REQUEST_DENIED</B>
The menu driver could not process the request.
</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
- <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="menu.3x.html">menu(3x)</A></STRONG>, <STRONG><A HREF="curs_getch.3x.html">getch(3x)</A></STRONG>.
+ <B><A HREF="curses.3X.html">curses(3X)</A></B>, <B><A HREF="curs_getch.3X.html">getch(3X)</A></B>, <B><A HREF="menu.3X.html">menu(3X)</A></B>.
</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
- The header file <STRONG><menu.h></STRONG> automatically includes the header files
- <STRONG><curses.h></STRONG>.
+ The header file <B><menu.h></B> automatically includes the header files
+ <B><curses.h></B>.
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
- These routines emulate the System V menu library. They were not sup-
- ported on Version 7 or BSD versions. The support for mouse events is
- ncurses specific.
+ These routines emulate the System V menu library. They were not
+ supported on Version 7 or BSD versions. The support for mouse events
+ is ncurses specific.
</PRE><H2><a name="h2-AUTHORS">AUTHORS</a></H2><PRE>
- <STRONG><A HREF="menu_driver.3x.html">menu_driver(3x)</A></STRONG>
+ <B><A HREF="menu_driver.3X.html">menu_driver(3X)</A></B>
</PRE>
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