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FTXUI

Functional Terminal (X) User interface

A simple C++ library for terminal based user interfaces!

Feature

  • Functional style. Inspired by [1] and React
  • Simple and elegant syntax (in my opinion)
  • Keyboard & mouse navigation.
  • Support for UTF8 and fullwidth chars (โ†’ ๆต‹่ฏ•)
  • Support for animations. Demo 1, Demo 2
  • Support for drawing. Demo
  • No dependencies
  • Cross platform: Linux/MacOS (main target), WebAssembly, Windows (Thanks to contributors!).
  • Learn by examples, and tutorials
  • Multiple packages: CMake FetchContent (preferred), vcpkg, pkgbuild, conan.
  • Good practises: documentation, tests, fuzzers, performance tests, automated CI, automated packaging, etc...

Documentation

Operating systems

This is expected to be cross platform. This supports / tests:

  • WebAssembly
  • Linux
  • MacOS
  • Windows

Example

  vbox({
    hbox({
      text("left") | border,
      text("middle") | border | flex,
      text("right") | border,
    }),
    gauge(0.5) | border,
  });
โ”Œโ”€โ”€โ”€โ”€โ”โ”Œโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”โ”Œโ”€โ”€โ”€โ”€โ”€โ”
โ”‚leftโ”‚โ”‚middle                                                         โ”‚โ”‚rightโ”‚
โ””โ”€โ”€โ”€โ”€โ”˜โ””โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”˜โ””โ”€โ”€โ”€โ”€โ”€โ”˜
โ”Œโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”
โ”‚โ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆ                                      โ”‚
โ””โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”˜

Short gallery

DOM

This module defines a hierarchical set of Element. An element manages layout and can be responsive to the terminal dimensions.

They are declared in <ftxui/dom/elements.hpp>

Layout

Element can be arranged together:

  • horizontally with hbox
  • vertically with vbox
  • inside a grid with gridbox
  • wrap along one direction using the flexbox.

Element can become flexible using the the flex decorator.

Example using hbox, vbox and filler.

image

Example using gridbox:

image

Example using flexbox:

image

See also this demo.

Style

An element can be decorated using the functions:

  • bold
  • dim
  • inverted
  • underlined
  • blink
  • color
  • bgcolor

Example

image

FTXUI supports the pipe operator. It means: decorator1(decorator2(element)) and element | decorator1 | decorator2 can be used.

Colors

FTXUI support every color palette:

Color gallery: image

Border and separator

Use decorator border and element separator() to subdivide your UI:

auto document = vbox({
    text("top"),
    separator(),
    text("bottom"),
}) | border;

Demo:

image

Text and paragraph

A simple piece of text is represented using text("content").

To support text wrapping following spaces the following functions are provided:

Element paragraph(std::string text);
Element paragraphAlignLeft(std::string text);
Element paragraphAlignRight(std::string text);
Element paragraphAlignCenter(std::string text);
Element paragraphAlignJustify(std::string text);

Paragraph example

ezgif com-gif-maker (4)

Table

A class to easily style a table of data.

Example:

image

Canvas

Drawing can be made on a Canvas, using braille, block, or simple characters:

Simple example:

image

Complex examples:

ezgif com-gif-maker (3)

Component

The ftxui/component is needed when you want to produce dynamic UI, reactive to the user's input. It defines a set of ftxui::Component. A component reacts to Events (keyboard, mouse, resize, ...) and Render Element (see previous section).

Prebuilt components are declared in <ftxui/component/component.hpp>

Gallery

Gallery of multiple components. (demo)

image

Radiobox

Example:

image

Checkbox

Example:

image

Input

Example:

image

Toggle

Example:

image

Slider

Example:

image

Menu

Example:

image

ResizableSplit

Example:

ezgif com-gif-maker

Dropdown

Example:

youtube-video-gif (3)

Tab

Vertical:

ezgif com-gif-maker (1)

Horizontal:

ezgif com-gif-maker (2)

Project using FTXUI

Feel free to add your projects here:

cpp-best-practices/game_jam

Several games using the FTXUI have been made during the Game Jam:

External package

It is highly recommended to use CMake FetchContent to depend on FTXUI. This way you can specify which commit you would like to depend on.

include(FetchContent)

FetchContent_Declare(ftxui
  GIT_REPOSITORY https://github.com/ArthurSonzogni/ftxui
  GIT_TAG v3.0.0
)

FetchContent_GetProperties(ftxui)
if(NOT ftxui_POPULATED)
  FetchContent_Populate(ftxui)
  add_subdirectory(${ftxui_SOURCE_DIR} ${ftxui_BINARY_DIR} EXCLUDE_FROM_ALL)
endif()

If you don't, the following packages have been created:

Contributors

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