X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=man%2Fmenu_driver.3x;h=086381f34be1e85cddbba2da26713728e17c3b51;hp=3643703f8ffc02e04bbf84e299a4d8ac286e075e;hb=b60a2772d9f149d8e900c1d5a09a53a56a0837a8;hpb=661078ddbde3ce0f3b06e95642fbb9b5fef7dca1 diff --git a/man/menu_driver.3x b/man/menu_driver.3x index 3643703f..086381f3 100644 --- a/man/menu_driver.3x +++ b/man/menu_driver.3x @@ -1,7 +1,39 @@ -.'" $Id: menu_driver.3x,v 1.5 1997/12/14 01:28:42 tom Exp $ +.\"*************************************************************************** +.\" Copyright (c) 1998-2018,2019 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, * +.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * +.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * +.\" 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 1.25 2019/01/20 20:32:23 tom Exp $ .TH menu_driver 3X "" +.de bP +.ie n .IP \(bu 4 +.el .IP \(bu 2 +.. .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 +41,19 @@ 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(3X). +.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 +107,101 @@ 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 +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 -System error occurred (see \fBerrno\fR). +.B E_SYSTEM_ERROR +System error occurred (see \fBerrno\fR(3)). .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), \fBmenu\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 +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. .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: +Juergen Pfeifer. +Manual pages and adaptation for new curses by Eric S. Raymond.