Single-header file picker Windows library for ImGui. 

# How to use

int renderFilePicker(wchar_t* userPath, bool* windowOpen, int windowFlags = 0) {

  Call `int fp::renderFilePicker(wchar_t* userPath, bool* windowOpen, int windowFlags = 0);` within the render loop providing a pre-allocated C-string buffer of MAX_PATH characters in `userPath`. `windowOpen` must be initially set to `true`, and will set itself to `false` when execution is done. If succesful, your buffer will contain a valid path. You can check the file picker state each frame by parsing this function's return value. You can provide `windowFlags` to customize its appearance.

## Window states

```
	- fp::ExitFlags::EXIT_CONTINUE : Window will render next frame. 
	- fp::ExitFlags::EXIT_SELECTED : A path has been successfully returned, window will close.
	- fp::ExitFlags::EXIT_CLOSED   : User has closed the window. No path is returned.
	- fp::ExitFlags::EXIT_ERROR    : An unexpected error has ocurred. No path is returned.
```

## Valid window flags
```
   - fp::WindowFlags::FP_FULLSCREEN`: Render window in full screen, without decorations.
```

# Library dependencies

  - **C++ STL**: This library uses `vector` and `w\string`.

## Build considerations

   Define `DEBUG` to print relevant information to the console.

# Demo build instructions

## Build requirements

  - [**GLFW v3**](https://github.com/glfw/glfw/releases): used as rendering backend. Executable in releases is compiled with version [`3.3.8`](https://github.com/glfw/glfw/releases/tag/3.3.8).
  - Compiled with `clang` using [**llvm-mingw 20220906**](https://github.com/mstorsjo/llvm-mingw/releases/tag/20220906).

## How to compile

   Download GLFW and pick your libraries according to your toolchain(`mingw-w64` in this example).

   Then, call your compiler directly (`clang` is demonstrated here) specifying both libs needed and your paths to the necessary header and lib files:
   
   ```
   clang++ demo/main.cpp -o demo/demo.exe -L C:/pathtollvmmingw/x86_64-w64-mingw32/bin -I C:\pathtollvmmingw\include -L C:/pathtoglfw/lib-mingw-w64 -I C:\pathtoglfw\include -lglfw3 -l libc++
   ```

   If you want to statically link:
   
   ```
	clang++ demo/main.cpp -o demo/si.exe -DDEBUG -L C:\capybara\libclang\x86_64-w64-mingw32\bin -L C:\capybara\libclang\x86_64-w64-mingw32\lib -I C:\capybara\libclang\include -std=c++17 -lglfw3 -l opengl32 -l gdi32 -l user32 -l kernel32 -l imm32 -static-libstdc++  --verbose
   ```

   Add `-DDEBUG` to print filepicker's debug information, if you so desire.
   
# To-Dos

  - Implement a file watcher to check for changes on the current directory.
  - Add Linux support.
  - Allow users to provide their own memory allocations as an option.