fl_file_dir.cxx

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//
// "$Id$"
//
// File chooser widget for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2015 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file.  If this
// file is missing or damaged, see the license at:
//
//     http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
//     http://www.fltk.org/str.php
//
 
#include "flstring.h"
#include <FL/filename.H>
#include <FL/Fl_File_Chooser.H>
#include <FL/fl_ask.H>
 
 
static Fl_File_Chooser  *fc = (Fl_File_Chooser *)0;
static void     (*current_callback)(const char*) = 0;
static const char   *current_label = fl_ok;
 
 
// Do a file chooser callback...
static void callback(Fl_File_Chooser *, void*) {
  if (current_callback && fc->value())
    (*current_callback)(fc->value());
}
 
// Pop up a file chooser dialog window and wait until it is closed...
static void popup(Fl_File_Chooser *fc) {
  fc->show();
 
  // deactivate Fl::grab(), because it is incompatible with modal windows
  Fl_Window* g = Fl::grab();
  if (g) Fl::grab(0);
 
  while (fc->shown())
    Fl::wait();
 
  if (g) // regrab the previous popup menu, if there was one
    Fl::grab(g);
}
 
 
void fl_file_chooser_callback(void (*cb)(const char*)) {
  current_callback = cb;
}
 
 
void fl_file_chooser_ok_label(const char *l) {
  if (l) current_label = l;
  else current_label = fl_ok;
}
 
char *                  // O - Filename or NULL
fl_file_chooser(const char *message,    // I - Message in titlebar
                const char *pat,    // I - Filename pattern
        const char *fname,  // I - Initial filename selection
        int        relative) {  // I - 0 for absolute path
  static char   retname[FL_PATH_MAX];       // Returned filename
 
  if (!fc) {
    if (!fname || !*fname) fname = ".";
 
    fc = new Fl_File_Chooser(fname, pat, Fl_File_Chooser::CREATE, message);
    fc->callback(callback, 0);
  } else {
    fc->type(Fl_File_Chooser::CREATE);
    // see, if we use the same pattern between calls
    char same_pattern = 0;
    const char *fcf = fc->filter();
    if ( fcf && pat && strcmp(fcf, pat)==0)
      same_pattern = 1;
    else if ( (fcf==0L || *fcf==0) && (pat==0L || *pat==0) )
      same_pattern = 1;
    // now set the pattern to the new pattern (even if they are the same)
    fc->filter(pat);
    fc->label(message);
 
    if (!fname) { // null pointer reuses same filename if pattern didn't change
      if (!same_pattern && fc->value()) {
    // if pattern is different, remove name but leave old directory:
    strlcpy(retname, fc->value(), sizeof(retname));
 
    char *p = strrchr(retname, '/');
 
        if (p) {
      // If the filename is "/foo", then the directory will be "/", not
      // ""...
      if (p == retname)
        retname[1] = '\0';
      else
        *p = '\0';
    }
    // Set the directory...
    fc->value(retname);
      } else {
        // re-use the previously selected name
      }
    } else if (!*fname) { // empty filename reuses directory with empty name
      const char *fcv = fc->value();
      if (fcv) 
        strlcpy(retname, fc->value(), sizeof(retname));
      else 
        *retname = 0;
      const char *n = fl_filename_name(retname);
      if (n) *((char*)n) = 0;
      fc->value("");
      fc->directory(retname);
    } else {
       fc->value(fname);
    }
  }
 
  fc->ok_label(current_label);
  popup(fc);
  if (fc->value() && relative) {
    fl_filename_relative(retname, sizeof(retname), fc->value());
 
    return retname;
  } else if (fc->value()) return (char *)fc->value();
  else return 0;
}
 
char *                  // O - Directory or NULL
fl_dir_chooser(const char *message, // I - Message for titlebar
               const char *fname,   // I - Initial directory name
           int        relative) // I - 0 for absolute
{
  static char   retname[FL_PATH_MAX];       // Returned directory name
 
  if (!fc) {
    if (!fname || !*fname) fname = ".";
 
    fc = new Fl_File_Chooser(fname, "*", Fl_File_Chooser::CREATE |
                                         Fl_File_Chooser::DIRECTORY, message);
    fc->callback(callback, 0);
  } else {
    fc->type(Fl_File_Chooser::CREATE | Fl_File_Chooser::DIRECTORY);
    fc->filter("*");
    if (fname && *fname) fc->value(fname);
    fc->label(message);
  }
 
  popup(fc);
 
  if (fc->value() && relative) {
    fl_filename_relative(retname, sizeof(retname), fc->value());
 
    return retname;
  } else if (fc->value()) return (char *)fc->value();
  else return 0;
}
//
// End of "$Id$".
//