Release 0.5 — Stabilization of stateless widgets, first-class theming, widget operations, Lazy widget, and more!

[hecrj]

Iced is an experimental cross-platform GUI library for Rust focused on simplicity and type-safety. Inspired by Elm.

This PR marks the end of the 0.5.0 milestone and the launch of a new release 🚀

New features

• Stabilization of stateless widgets (Replace stateful widgets with the new iced_pure API #1393)
  The old widget API has been completely replaced by stateless widgets (introduced in Stateless widgets #1284). Alongside the new API, there are a bunch of new helper functions and macros for easily describing view logic (like row! and column!).

• First-class theming (Theming #1362)
  A complete overhaul of our styling primitives, introducing a Theme as a first-class concept of the library.

• Widget operations (Widget Operations #1399)
  An abstraction that can be used to traverse (and operate on) the widget tree of an application in order to query or update some widget state.

• Lazy widget (Lazy widget #1400)
  A widget that can call some view logic lazily only when some data has changed. Thanks to @nicksenger!

• Linear gradient support for Canvas (Add linear gradient support to canvas widget #1448)
  The Canvas widget can draw linear gradients now. Thanks to @bungoboingo!

• Touch support for Canvas (Expose touch events in canvas widget #1305)
  The Canvas widget now supports touch events. Thanks to @artursapek!

• Image and Svg support for iced_glow (Glow image rendering support; move image/svg code to iced_graphics #1485)
  Our OpenGL renderer now is capable of rendering both the Image and Svg widgets. Thanks to @ids1024!

Showcase

During this year, many users have chosen iced to build their applications! Here are some of the coolest ones:

• Enclone Visual, a graphical user interface (GUI) for enclone.
• icy_term, a BBS terminal program which allows you to connect to BBSes.
• Microlaunch, a FINAL FANTASY XIV Online native launcher for Linux.
• mr3-advanced-viewer, a GUI application to view Monster Rancher 3 data running in PCSX2.
• SlimeVR Wrangler, use Joy-Con's as SlimeVR trackers, enabling you to make a full body system with your existing devices.
• ytdlp-gui, a GUI for yt-dlp written in Rust.

Finally, and deserving a special mention, System76 has decided to use iced instead of GTK for Pop!_OS' desktop environment 🎉 This is one of the most important adoption events since the inception of the library. The engineers at System76 are already contributing a bunch of great improvements to iced, as well as breaking ground in long-standing issues that could benefit the whole GUI ecosystem in Rust (like proper text rendering!).

Thank you! 🎉

As always, I want to say thank you to everyone that has contributed to this release:

• @0x192 exported overlay::menu publicly (Make overlay::menu accessible #1425).
• @13r0ck updated the documentation for the integration examples after a rename (Update docs for renamed integration examples #1433).
• @aentity added an application feature to iced_winit (Add application feature, which allows to build freestanding wgpu app #1196).
• @AlistairKeiller fixed the supported backends listed in the README of iced_wgpu (Fix wgpu README supported backends  #1458).
• @artursapek added touch support for the Canvas widget (Expose touch events in canvas widget #1305).
• @bungoboingo
  • added supported for linear gradients to the Canvas widget (Add linear gradient support to canvas widget #1448), and
  • fixed issues with old OpenGL versions in iced_glow (Fixed issues with old GL versions ( <= 2.1 ) #1518).
• @casperstorm changed the images in the README to have similar height (fix: corrected images in README.md to be similar height. #1356).
• @clarkmoody tweaked the system information queries (Tweak System Information #1445).
• @Cupnfish updated wgpu to 0.13 (update wgpu to 0.13 #1378).
• @daladim added convenience functions for window::Icon (Added convenience functions for window::icon::Icon #1174).
• @derezzedex implemented commands to query system information (feat: fetch system information #1314).
• @fralonra
  • fixed the import path in the documentation example of the pure Canvas widget (Update import path in pure canvas example #1373), and
  • fixed the documentation for running integration_wgpu (Update docs for running integration_wgpu example #1434).
• @icedrocket enabled the application feature in iced_glutin (fix: enable application feature required in iced_glutin #1502).
• @ids1024
  • documented that window::Action::Move is unsupported on Wayland (Document that window::Action::Move is unsupported on Wayland #1440)
  • replaced lazy_static! with once_cell (Use once_cell instead of lazy_static #1497)
  • added support for Cow<'static, [u8]> in the Image and Svg widgets (Use Cow<'static, [u8]> in image/svg, add constructors taking &[u8]` #1453)
  • implemented Image and Svg support for iced_glow (Glow image rendering support; move image/svg code to iced_graphics #1485)
  • fixed wrong conversion to BGRA before passing to image shaders (Don't convert svg to BGRA before passing to shader #1507), and
  • combined the glow_default_system_font and default_system_font features (Combine glow_default_system_font and default_system_font features #1505).
• @jhannyjimenez clarified the position and alignment of text in the documentation of Canvas (Added more clarification as to how the position and alignment of the … #1370).
• @kaimast improved the integration of event processing for custom shells (Pass ignored events to program #1230).
• @LordRatte implemented a color! macro helper (color! macro #1227).
• @Luni-4
  • added a release-opt profile to our Cargo.toml (Add profile release #1346), and
  • improved our GitHub CI workflows (CI improvements #1387).
• @maxwell8888 added a pure version of the color_palette example (add pure version of color_palette example #1326).
• @mmstick introduced additional actions for window controls (feat: Additional actions for window controls #1471).
• @mtkennerly
  • added a note about the resolver requirement (Add note about resolver requirement #1339)
  • added missing version to the issue template (Add missing versions to issue template #1340)
  • changed the title bar of the PaneGrid widget to prevent content and controls from overlapping (Prevent pane grid title bar content and controls from overlapping #1361), and
  • changed the title bar of the PaneGrid widget to still show content until hover when cramped (When pane grid title bar is cramped, still show content until hover and allow dragging where content would've been #1424).
• @nicksenger
  • fixed Component building overlay with stale layout (fix: prevent building component overlay with stale layout #1341)
  • implemented custom border_radius support for pick_list::Menu (Allow specification of border_radius for pick_list::Menu #1396), and
  • implemented the Lazy widget (Lazy widget #1400).
• @pheki removed the old pure feature from docs.rs build metadata (Remove old pure feature from docs.rs build metadata #1429).
• @PolyMeilex addressed a bunch of clippy lints (Address Clippy lints #1379).
• @RamType0 introduced Cow support for the Text widget (Text content by cow #1107).
• @tarkah
  • fixed processing logic of captured events for overlays (Don't process captured overlay statuses #1353)
  • fixed alpha blending for MSAA in iced_wgpu (Fix alpha blending for wgpu msaa #1367)
  • allowed overriding the value of a pure TextInput during draw (Allow overriding pure text_input value during draw #1371)
  • implemented Widget::operate for the Component widget (Impl operate for Component widget #1402)
  • fixed a double translation bug in the text clipping rectangle for the Canvas widget (Don't double translate text clip inside canvas #1411)
  • fixed the Tooltip widget when inside a Scrollable (Fix Tooltip inside Scrollable #1405)
  • changed the Tooltip text layout to not be constricted by the viewport size (Don't constrict tooltip text layout to viewport size #1414)
  • changed the rendering order of the PaneGrid title bar and its body (Render pane grid titlebar after body #1463)
  • fixed some issues with the PaneGrid widget (More pane grid fixes #1480)
  • fixed PickList menu not closing when inside a Scrollable (Fix drop down not closing when inside scrollable #1496)
  • constrained Padding to fit available space during layout (Constrain padding to resolved inner / outer widget sizes #1494), and
  • added pane maximize and restore functionality for the PaneGrid widget (Add pane maximize / restore for PaneGrid #1504).
• @ThatsNoMoon fixed the implementation of arc_to for the Canvas widget (Fix arc_to #1358).
• @thenlevy fixed some issues with the integration_wgpu example (Fix wgpu integration example #1139).
• @ThisIsRex added an is_selected argument to the StyleSheet of a Radio widget (is_selected property for Radio StyleSheet #1331).
• @traxys implemented support to replace an existing DOM element when targeting Wasm (Allow to replace an element instead of append to body for web rendering #1443).
• @xkenmon implemented a sierpinski-triangle example (Implement sierpinski-triangle example #1136).
• @xTekC updated the test badge in the README (update: match test badge #1450).
• @wash2
  • fixed synchronization of window and viewport (fix: sync size of window and viewport #1437), and
  • added a Custom variant to the built-in Theme (Add custom palette to built in theme #1432).
• @wuxianucw relaxed the Fn trait bounds for Command and Action (Relax Fn trait bounds in Command & Action #1409).
• @wyatt-herkamp
  • added an on_paste handler to the TextInput widget (Added a paste Event to TextInput #1350)
  • updated winit to 0.27 and glutin to 0.29 (Update winit to 0.27 and glutin to 0.29 #1410), and
  • updated wgpu to 0.14 and wgpu_glyph to 0.18 (Update wgpu to 0.14 and wgpu_glyph to 0.18 #1462).

Thank you, everyone! 🎉

[aolyang]

Wow, you guys do really amazing things.