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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 (→ 测试)
• 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

• Starter example project
• Documentation
• Examples (WebAssembly)
• Build using CMake

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,
  });

┌────┐┌───────────────────────────────────────────────────────────────┐┌─────┐
│left││middle                                                         ││right│
└────┘└───────────────────────────────────────────────────────────────┘└─────┘
┌────────────────────────────────────────────────────────────────────────────┐
│██████████████████████████████████████                                      │
└────────────────────────────────────────────────────────────────────────────┘

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.

Example using gridbox:

Example using flexbox:

See also this demo.

Style

An element can be decorated using the functions:

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

Example

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:

Border and separator

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

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

Demo:

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

Table

A class to easily style a table of data.

Example:

Canvas

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

Simple example:

Complex examples:

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)

Radiobox

Example:

Checkbox

Example:

Input

Example:

Toggle

Example:

Slider

Example:

Menu

Example:

ResizableSplit

Example:

Dropdown

Example:

Tab

Vertical:

Horizontal:

Project using FTXUI

Feel free to add your projects here:

• json-tui
• git-tui
• rgb-tui
• chrome-log-beautifier
• x86-64 CPU Architecture Simulation
• ltuiny
• i3-termdialogs
• Just-Fast
• simpPRU
• Pigeon ROS TUI
• hastur
• CryptoCalculator
• todoman
• TimeAccumulator
• vantage
• tabdeeli
• tiles
• cachyos-cli-installer
• beagle-config
• turing_cmd

cpp-best-practices/game_jam

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

• TermBreaker [Play web version]
• Minesweeper Marathon [Play web version]
• Grand Rounds
• LightsRound
• DanteO
• Sumo
• Drag Me aROUND
• DisarmSelfDestruct
• TheWorld
• smoothlife
• Consu

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 v2.0.0
)

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:

• vcpkg
• Arch Linux PKGBUILD.
• conan.io

Contributors