X-Git-Url: https://ncurses.scripts.mit.edu/?a=blobdiff_plain;f=man%2Fmenu_driver.3x;h=1fe5001fec056e8cb6a362fb2fb0caf53283f868;hb=cdbe3d3df7ca08989c4aaead5164309466e519eb;hp=d64853563a218bf78fbf05793b449859eb2427ce;hpb=3a9b6a3bf0269231bef7de74757a910dedd04e0c;p=ncurses.git
diff --git a/man/menu_driver.3x b/man/menu_driver.3x
index d6485356..1fe5001f 100644
--- a/man/menu_driver.3x
+++ b/man/menu_driver.3x
@@ -1,7 +1,38 @@
-'\" t
+.\"***************************************************************************
+.\" Copyright (c) 1998-2008,2010 Free Software Foundation, Inc. *
+.\" *
+.\" Permission is hereby granted, free of charge, to any person obtaining a *
+.\" copy of this software and associated documentation files (the *
+.\" "Software"), to deal in the Software without restriction, including *
+.\" without limitation the rights to use, copy, modify, merge, publish, *
+.\" distribute, distribute with modifications, sublicense, and/or sell *
+.\" copies of the Software, and to permit persons to whom the Software is *
+.\" furnished to do so, subject to the following conditions: *
+.\" *
+.\" The above copyright notice and this permission notice shall be included *
+.\" in all copies or substantial portions of the Software. *
+.\" *
+.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
+.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
+.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
+.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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+.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
+.\" *
+.\" Except as contained in this notice, the name(s) of the above copyright *
+.\" holders shall not be used in advertising or otherwise to promote the *
+.\" sale, use or other dealings in this Software without prior written *
+.\" authorization. *
+.\"***************************************************************************
+.\"
+.\" $Id: menu_driver.3x,v 1.20 2010/12/04 18:38:55 tom Exp $
.TH menu_driver 3X ""
+.de bP
+.IP \(bu 4
+..
.SH NAME
-\fBmenu_driver\fR - command-processing loop of the menu system
+\fBmenu_driver\fR \- command-processing loop of the menu system
.SH SYNOPSIS
\fB#include
\fR
.br
@@ -9,8 +40,18 @@ int menu_driver(MENU *menu, int c);
.br
.SH DESCRIPTION
Once a menu has been posted (displayed), you should funnel input events to it
-through \fBmenu_driver\fR. This routine has two major input cases; either
-the input is a menu navigation request or it's a printable ASCII character.
+through \fBmenu_driver\fR. This routine has three major input cases:
+.bP
+The input is a form navigation request.
+Navigation request codes are constants defined in \fB\fP,
+which are distinct from the key- and character codes returned by \fBwgetch\fP.
+.bP
+The input is a printable character.
+Printable characters (which must be positive, less than 256) are
+checked according to the program's locale settings.
+.bP
+The input is the KEY_MOUSE special key associated with an mouse event.
+.PP
The menu driver requests are as follows:
.TP 5
REQ_LEFT_ITEM
@@ -64,59 +105,96 @@ Move to the next item matching the pattern match.
REQ_PREV_MATCH
Move to the previous item matching the pattern match.
.PP
-If the second argument is a printable ASCII character, the code appends
+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, \fBmenu_driver\fR returns
\fBE_NO_MATCH\fR and deletes the appended character from the buffer.
.PP
If the second argument is one of the above pre-defined requests, the
corresponding action is performed.
+.SS MOUSE HANDLING
+.PP
+If the second argument is the KEY_MOUSE special key, the associated
+mouse event is translated into one of the above pre-defined requests.
+Currently only clicks in the user window (e.g., inside the menu display
+area or the decoration window) are handled.
+.PP
+If you click above the display region of the menu:
+.bP
+a REQ_SCR_ULINE is generated for a single click,
+.bP
+a REQ_SCR_UPAGE is generated for a double-click and
+.bP
+a REQ_FIRST_ITEM is generated for a triple-click.
+.PP
+If you click below the display region of the menu:
+.bP
+a REQ_SCR_DLINE is generated for a single click,
+.bP
+a REQ_SCR_DPAGE is generated for a double-click and
+.bP
+a REQ_LAST_ITEM is generated for a triple-click.
+.PP
+If you click at an item inside the display area of the menu:
+.bP
+the menu cursor is positioned to that item.
+.bP
+If you double-click an item a REQ_TOGGLE_ITEM
+is generated and \fBE_UNKNOWN_COMMAND\fR 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.
+.bP
+If a translation
+into a request was done, \fBmenu_driver\fR returns the result of this request.
+.PP
+If you clicked outside the user window or the mouse event could not be translated
+into a menu request an \fBE_REQUEST_DENIED\fR is returned.
+.SS APPLICATION-DEFINED COMMANDS
.PP
-If the second argument is neither printable ASCII nor one of the above
-pre-defined menu requests, the drive assumes it is an application-specific
+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 application-specific
command and returns \fBE_UNKNOWN_COMMAND\fR. Application-defined commands
should be defined relative to \fBMAX_COMMAND\fR, the maximum value of these
pre-defined requests.
.SH RETURN VALUE
\fBmenu_driver\fR return one of the following error codes:
.TP 5
-\fBE_OK\fR
+.B E_OK
The routine succeeded.
.TP 5
-\fBE_SYSTEM_ERROR\fR
+.B E_SYSTEM_ERROR
System error occurred (see \fBerrno\fR).
.TP 5
-\fBE_BAD_ARGUMENT\fR
+.B E_BAD_ARGUMENT
Routine detected an incorrect or out-of-range argument.
.TP 5
-\fBE_BAD_STATE\fR
+.B E_BAD_STATE
Routine was called from an initialization or termination function.
.TP 5
-\fBE_NOT_POSTED\fR
+.B E_NOT_POSTED
The menu has not been posted.
.TP 5
-\fBE_UNKNOWN_COMMAND\fR
+.B E_UNKNOWN_COMMAND
The menu driver code saw an unknown request code.
.TP 5
-\fBE_NO_MATCH\fR
+.B E_NO_MATCH
Character failed to match.
.TP 5
-\fBE_REQUEST_DENIED\fR
+.B E_REQUEST_DENIED
The menu driver could not process the request.
.SH SEE ALSO
-\fBcurses\fR(3X), \fBmenus\fR(3x).
+\fBcurses\fR(3X),
+\fBmenu\fR(3X),
+\fBgetch\fR(3X).
.SH NOTES
The header file \fB\fR automatically includes the header files
\fB\fR.
.SH PORTABILITY
These routines emulate the System V menu library. They were not supported on
-Version 7 or BSD versions.
+Version 7 or BSD versions. The support for mouse events is ncurses specific.
.SH AUTHORS
Juergen Pfeifer. Manual pages and adaptation for new curses by Eric
S. Raymond.
-.\"#
-.\"# The following sets edit modes for GNU EMACS
-.\"# Local Variables:
-.\"# mode:nroff
-.\"# fill-column:79
-.\"# End: