Slint C++ documentation#

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Slint is a toolkit to efficiently develop fluid graphical user interfaces for any display: embedded devices and desktop applications. Slint C++ is the C++ API to interact with a Slint UI from C++.

The .slint Markup Language#

Slint comes with a markup language that is specifically designed for user interfaces. This language provides a powerful way to describe graphical elements, their placement, and the flow of data through the different states. It is a familiar syntax to describe the hierarchy of elements and property bindings. Here’s the obligatory “Hello World”:

export component HelloWorld inherits Window {
    width: 400px;
    height: 400px;

    Text {
       y: parent.width / 2;
       x: parent.x + 200px;
       text: "Hello, world";
       color: blue;
    }
}

Check out the Slint Language Documentation for more details.

Architecture#

An application is composed of the business logic written in C++ and the .slint user interface design markup, which is compiled to native code.

Architecture Overview

Developing#

You can create and edit .slint files using our Slint Visual Studio Code Extension, which features syntax highlighting and live design preview.

For a quick edit and preview cycle, you can also use the slint-viewer command line tool, which can be installed using cargo install slint-viewer, if you have Cargo installed.

In the next section you will learn how to install the Slint C++ library and the CMake build system integration.