Getting started

This tutorial shows you how to use the languages that Slint supports as the host programming language.

We recommend using our editor integrations for Slint ↗ for following this tutorial.

Slint has application templates you can use to create a project with dependencies already set up that follows recommended best practices.

Prerequisites

C++

Before using the template, you need a C++ compiler that supports C++ 20 and to install CMake ↗ 3.21 or newer.

1. Download and extract the ZIP archive ↗ of the C++ Template ↗.
2. Rename the extracted directory and change into it:

mv slint-cpp-template-main memory
cd memory

bash

Configure the project

The CMakeLists.txt uses the line add_executable(my_application src/main.cpp) to set src/main.cpp as the main C++ code file.

Replace the content of src/main.cpp with the following:

main_initial.cpp

#include "app-window.h" // generated header from ui/app-window.slint

int main(int argc, char **argv)
{
    auto main_window = MainWindow::create();
    main_window->run();
}

C++

Also in CMakeLists.txt the line slint_target_sources(my_application ui/app-window.slint) is a Slint function used to add the app-window.slint file to the target.

Replace the contents of ui/app-window.slint with the following:

app-window.slint

export component MainWindow inherits Window {
    Text {
        text: "hello world";
        color: green;
    }
}

slint

Configure with CMake:

cmake -B build

bash

Tip

When configuring with CMake, the FetchContent module fetches the source code of Slint via git. This may take some time when building for the first time, as the process needs to build the Slint runtime and compiler.

Build with CMake:

cmake --build build

bash

Run the application

Run the application binary on Linux or macOS:

./build/my_application

bash

Or on Windows:

build\my_application.exe

bash

This opens a window with a green “Hello World” greeting.

If you are stepping through this tutorial on a Windows machine, you can run the application at each step with:

my_application

bash

NodeJS

1. Download and extract the ZIP archive ↗ of the Node.js Template ↗.
2. Rename the extracted directory and change into it:

mv slint-nodejs-template-main memory
cd memory

bash

3. Install dependencies with npm:

npm install

bash

Configure the project

The package.json file references src/main.js as the entry point for the application and src/main.js references memory.slint as the UI file.

Replace the contents of src/main.js with the following:

main_initial.js

import * as slint from "slint-ui";

const ui = slint.loadFile(new URL("./ui/app-window.slint", import.meta.url));
const mainWindow = new ui.MainWindow();
await mainWindow.run();

js

The slint.loadFile method resolves files from the process’s current working directory, so from the package.json file’s location.

Replace the contents of ui/app-window.slint with the following:

memory.slint

export component MainWindow inherits Window {
    Text {
        text: "hello world";
        color: green;
    }
}

slint

Run the application

Run the example with npm start and a window appears with the green “Hello World” greeting.

Rust

We recommend using rust-analyzer ↗ and our editor integrations for Slint ↗ for following this tutorial.

1. Download and extract the ZIP archive ↗ of the Rust Template ↗.
2. Rename the extracted directory and change into it:

mv slint-rust-template-main memory
cd memory

bash

Configure the project

Replace the contents of src/main.rs with the following:

slint::include_modules!();

fn main() -> Result<(), slint::PlatformError> {
    let main_window = MainWindow::new()?;

    main_window.run()
}

rust

Replace the contents of ui/app-window.slint with the following:

memory.slint

export component MainWindow inherits Window {
    Text {
        text: "hello world";
        color: green;
    }
}

slint

Run the application

Run the example with cargo run and a window appears with the green “Hello World” greeting.

Python

1. Download and extract the ZIP archive ↗ of the Python Template ↗.
2. Rename the extracted directory and change into it:

mv slint-python-template-main memory
cd memory

bash

3. Install dependencies with uv:

uv sync

bash

Configure the project

The entry point for the application is main.py, the UI file is app-window.slint.

Replace the contents of main.py with the following:

main.py

import slint


class MainWindow(slint.loader.ui.app_window.MainWindow):
    pass


main_window = MainWindow()
main_window.show()
main_window.run()

python

The slint.loadFile method resolves files from the process’s current working directory, so from the package.json file’s location.

Replace the contents of ui/app-window.slint with the following:

memory.slint

export component MainWindow inherits Window {
    Text {
        text: "hello world";
        color: green;
    }
}

slint

Run the application

Run the example with uv run main.py and a window appears with the green “Hello World” greeting.