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//
// 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:
//
// https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
// https://www.fltk.org/bugs.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 *filechooser) {
filechooser->show();
// deactivate Fl::grab(), because it is incompatible with modal windows
Fl_Window* g = Fl::grab();
if (g) Fl::grab(0);
while (filechooser->shown())
Fl::wait();
if (g) // regrab the previous popup menu, if there was one
Fl::grab(g);
}
/** \addtogroup group_comdlg
@{ */
/**
Set the file chooser callback
\note \#include <FL/Fl_File_Chooser.H>
\relates Fl_File_Chooser
*/
void fl_file_chooser_callback(void (*cb)(const char*)) {
current_callback = cb;
}
/**
Set the "OK" button label
\note \#include <FL/Fl_File_Chooser.H>
\relates Fl_File_Chooser
*/
void fl_file_chooser_ok_label(const char *l) {
if (l) current_label = l;
else current_label = fl_ok;
}
/**
Shows a file chooser dialog and gets a filename.
\note \#include <FL/Fl_File_Chooser.H>
\image html Fl_File_Chooser.jpg
\image latex Fl_File_Chooser.jpg "Fl_File_Chooser" width=12cm
\param[in] message text in title bar
\param[in] pat filename pattern filter
\param[in] fname initial/default filename selection
\param[in] relative 0 for absolute path name, relative path name otherwise
\return the user selected filename, in absolute or relative format
or NULL if user cancels
\relates Fl_File_Chooser
*/
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) {
// first time, so create file chooser, remember pointer,
// and if no filename given, set it to current directory
if (!fname || !*fname) fname = ".";
fc = new Fl_File_Chooser(fname, pat, Fl_File_Chooser::CREATE, message);
fc->callback(callback, 0);
} else {
// file chooser exists, so check old/new directory, pattern, filename
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) {
// new filename is null, so reuse old one if pattern unchanged
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 old filename as "/foo", then 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) {
// new filename is empty, so reuse old directory with empty file
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;
// retname is either old directory, or empty if user cancelled
if (*retname) {
fc->value("");
fc->directory(retname); // reset old directory
} else {
char dirsave[FL_PATH_MAX];
strlcpy(dirsave, fc->directory(), sizeof(dirsave));
fc->value(""); // also resets directory to "system default"
fc->directory(dirsave); // so reset directory back where we were
}
} else {
fc->value(fname);
}
}
// end [re]initialization
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;
}
/** Shows a file chooser dialog and gets a directory.
\note \#include <FL/Fl_File_Chooser.H>
\param[in] message title bar text
\param[in] fname initial/default directory name
\param[in] relative 0 for absolute path return, relative otherwise
\return the directory path string chosen by the user or NULL if user cancels
\relates Fl_File_Chooser
*/
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;
}
/** @} */