Native File Dialog

Modified to be usable as a dynamic library.

A tiny, neat C library that portably invokes native file open, folder select and save dialogs. Write dialog code once and have it pop up native dialogs on all supported platforms. Avoid linking large dependencies like wxWidgets and qt.

Features:

Lean C API, static library -- no ObjC, no C++, no STL.
Zlib licensed.
Consistent UTF-8 support on all platforms.
Simple universal file filter syntax.
Paid support available.
Multiple file selection support.
64-bit and 32-bit friendly.
GCC, Clang, Xcode, Mingw and Visual Studio supported.
No third party dependencies for building or linking.
Support for Vista's modern IFileDialog on Windows.
Support for non-deprecated Cocoa APIs on OS X.
GTK3 dialog on Linux.
Optional Zenity support on Linux to avoid linking GTK.
Tested, works alongside http://www.libsdl.org on all platforms, for the game developers out there.

Note: I am considering deprecating mingw support on Windows. Please contribute your thoughts at this issue.

Example Usage

#include <nfd.h>
#include <stdio.h>
#include <stdlib.h>

int main( void )
{
    nfdchar_t *outPath = NULL;
    nfdresult_t result = NFD_OpenDialog( NULL, NULL, &outPath );
        
    if ( result == NFD_OKAY ) {
        puts("Success!");
        puts(outPath);
        free(outPath);
    }
    else if ( result == NFD_CANCEL ) {
        puts("User pressed cancel.");
    }
    else {
        printf("Error: %s\n", NFD_GetError() );
    }

    return 0;
}

See NFD.h for more options.

Screenshots

Changelog

release	what's new	date
1.0.0	initial	oct 2014
1.1.0	premake5; scons deprecated	aug 2016
1.1.1	mingw support, build fixes	aug 2016
1.1.2	test_pickfolder() added	aug 2016
1.1.3	zenity linux backend added	nov 2017
1.1.3	fix char type in decls	nov 2017
1.1.4	fix win32 memleaks	dec 2018
1.1.4	improve win32 errorhandling	dec 2018
1.1.4	macos fix focus bug	dec 2018

Building

NFD uses Premake5 generated Makefiles and IDE project files. The generated project files are checked in under build/ so you don't have to download and use Premake in most cases.

If you need to run Premake5 directly, further build documentation is available.

Previously, NFD used SCons to build. It still works, but is now deprecated; updates to it are discouraged. Opt to use the native build system where possible.

nfd.a will be built for release builds, and nfd_d.a will be built for debug builds.

Makefiles

The makefile offers five options, with release_x64 as the default.

make config=release_x86
make config=release_x64
make config=debug_x86
make config=debug_x64

Compiling Your Programs

Add src/include to your include search path.
Add nfd.lib or nfd_d.lib to the list of list of static libraries to link against (for release or debug, respectively).
Add build/<debug|release>/<arch> to the library search path.

Linux GTK

apt-get libgtk-3-dev installs the gtk dependency for library compilation.

On Linux, you have the option of compiling and linking against GTK. If you use it, the recommended way to compile is to include the arguments of pkg-config --cflags --libs gtk+-3.0.

Linux Zenity

Alternatively, you can use the Zenity backend by running the Makefile in build/gmake_linux_zenity. Zenity runs the dialog in its own address space, but requires the user to have Zenity correctly installed and configured on their system.

MacOS

On Mac OS, add AppKit to the list of frameworks.

Windows

On Windows, ensure you are building against comctl32.lib.

Usage

See NFD.h for API calls. See tests/*.c for example code.

After compiling, build/bin contains compiled test programs.

File Filter Syntax

There is a form of file filtering in every file dialog API, but no consistent means of supporting it. NFD provides support for filtering files by groups of extensions, providing its own descriptions (where applicable) for the extensions.

A wildcard filter is always added to every dialog.

Separators

; Begin a new filter.
, Add a separate type to the filter.

Examples

txt The default filter is for text files. There is a wildcard option in a dropdown.

png,jpg;psd The default filter is for png and jpg files. A second filter is available for psd files. There is a wildcard option in a dropdown.

NULL Wildcard only.

Iterating Over PathSets

See test_opendialogmultiple.c.

Known Limitations

I accept quality code patches, or will resolve these and other matters through support. See submitting pull requests for details.

No support for Windows XP's legacy dialogs such as GetOpenFileName.
No support for file filter names -- ex: "Image Files" (*.png, *.jpg). Nameless filters are supported, however.

Copyright and Credit

Native File Dialog by Michael Labbe mike@frogtoss.com

Tomasz Konojacki for microutf8

Denis Kolodin for mingw support.

Tom Mason for Zenity support.

Support

Directed support for this work is available from the original author under a paid agreement.

Contact Frogtoss Games.

dylanmccall/nativefiledialog