October 6, 2021 by Olivier Goffart and Simon Hausmann

SixtyFPS 0.1.3 and Cargo UI 0.2 Released

Today we're releasing SixtyFPS version 0.1.3, and Cargo UI version 0.2. This blog post highlights some of the new features in these releases.

SixtyFPS 0.1.3

SixtyFPS is a framework to develop graphical user interfaces for desktop and embedded platforms. The release version 0.1.3 contains new features and bug fixes. Applications developed with previous releases in the 0.1.x series continue to run with version 0.1.3.

Dialog and StandardButton

Use the new Dialog element and StandardButton widget to display dialogs. The buttons in the dialog are ordered according to established platform conventions. For example, on Windows, the OK button is always placed to the left of the Cancel button; it's the opposite on macOS. On Linux the desktop environment determines the order.

import { StandardButton, GridBox,
    LineEdit }
    from "sixtyfps_widgets.60";

export MyDialog := Dialog {
    property name <=> name-le.text;
    property address <=> address-le.text;
    StandardButton { kind: ok; }
    StandardButton { kind: cancel; }
    preferred-width: 300px;
    GridBox {
        Row {
            Text {
                text: "Enter Your name";
            name-le := LineEdit { }
        Row {
            Text {
                text: "Address";
            address-le := LineEdit { }

Dialog on macOS:

Screenshot of a simple dialog on macOS

Dialog on Windows:

Screenshot of a simple dialog on Windows

New callbacks on the TouchArea element

Use the new moved callback to continuously track pointer movements. With the pointer-event callback you can customize the behavior of your controls based on which buttons were pressed or released. The Fluent style uses these callbacks now to improve the feel of the scrollbars.

Next steps

We hope that you'll enjoy upgrading to this new version. If you're using SixtyFPS with Rust and Cargo, just run cargo update to update your application to the latest release. If you're using our CMake integration with FetchContent, update the GIT_TAG entry in your CMakeLists.txt to specify v0.1.3.

For our C++ users it's worth noting that we now require CMake version 3.19 or newer.

For a detailed list of all changes, check out the CHANGELOG.md

Cargo UI 0.2

Cargo UI is the graphical frontend for cargo that we are developing. It supports building and running your programs.

In this release, we added a few features such as the dependency tree widget to visualize the dependencies and the feature selection to view and toggle cargo features for your project. We also added a tab showing the list of available Rust toolchains.

Cargo UI 0.2 screenshot
Cargo UI 0.2 screenshot

Get this update

Run the following command to install Cargo UI:

cargo install --force cargo-ui

Use the same command to upgrade a previous installation to the latest version.

We're happy to receive feedback, ideas and suggestions at any time. Please file them in the Cargo UI Github repository.


Slint is a declarative GUI toolkit to build native user interfaces for desktop and embedded applications written in Rust, C++, JavaScript, and Python. Find more information at https://slint.dev/ or check out the source code at https://github.com/slint-ui/slint