mirror of https://github.com/fltk/fltk
examples/howto-parse-args.cxx: now with added comments and svn:keywords
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@7728 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
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//
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//
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// "$Id:$"
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// "$Id$"
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//
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//
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// How to parse command line arguments - Duncan Gibson 2010-10-23
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// How to parse command line arguments - Duncan Gibson 2010-10-23
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// First posted in http://www.fltk.org/newsgroups.php?gfltk.general+v:31449
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// First posted in http://www.fltk.org/newsgroups.php?gfltk.general+v:31449
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// Shows how to decode additional command line arguments using Fl::args()
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// Shows how to decode additional command line arguments using Fl::args()
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// on top of the "standard" options used by the toolkit itself.
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// on top of the "standard" options used by the toolkit itself.
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//
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//
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// Note that this only handles "option separateValue" rather than the
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// usual *nix idiom of "option=value", and provides no validation nor
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// conversion of the paramter string into ints or floats.
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//
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// Copyright 1998-2010 by Bill Spitzak and others.
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// Copyright 1998-2010 by Bill Spitzak and others.
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//
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//
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// This library is free software; you can redistribute it and/or
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// This library is free software; you can redistribute it and/or
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//
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//
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// http://www.fltk.org/str.php
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// http://www.fltk.org/str.php
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//
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//
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#include <stdio.h>
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#include <string.h>
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#include <FL/Fl.H>
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#include <FL/Fl.H>
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#include <FL/Fl_Box.H>
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#include <FL/Fl_Box.H>
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#include <FL/Fl_Window.H>
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#include <FL/Fl_Window.H>
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#include "stdio.h"
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#include "string.h"
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int helpFlag = 0;
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int helpFlag = 0;
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char *optionString = 0;
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char *optionString = 0;
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/*
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* callback function passed to Fl::args() to parse individual argument.
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* If there is a match, 'i' must be incremented by 2 or 1 as appropriate.
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* If there is no match, Fl::args() will then call Fl::arg() as fallback
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* to try to match the "standard" FLTK parameters.
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*
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* Returns 2 if argv[i] matches with required parameter in argv[i+1],
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* returns 1 if argv[i] matches on its own,
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* returns 0 if argv[i] does not match.
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*/
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int arg(int argc, char **argv, int &i)
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int arg(int argc, char **argv, int &i)
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{
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{
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if (strcmp("-h", argv[i]) == 0 || strcmp("--help", argv[i]) == 0) {
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if (strcmp("-h", argv[i]) == 0 || strcmp("--help", argv[i]) == 0) {
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@ -77,10 +91,12 @@ int main(int argc, char** argv)
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Fl_Box* textBox = new Fl_Box(0, 0, 300, 200);
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Fl_Box* textBox = new Fl_Box(0, 0, 300, 200);
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if (optionString != 0)
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if (optionString != 0)
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textBox->label(optionString);
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textBox->label(optionString);
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else
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textBox->label("re-run with [-o|--option] text");
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mainWin->show(argc, argv);
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mainWin->show(argc, argv);
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return Fl::run();
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return Fl::run();
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}
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}
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//
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//
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// End of "$Id:$".
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// End of "$Id$".
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//
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//
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