Release 0.3 — Touch support, clipboard write access, image viewer, tooltips, 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 0.3.0 milestone and the launch of a new release!

This is a relatively minor release when compared to the two previous ones: #637 and #253.

At this point, instead of focusing on delivering a lot of new features at once, I believe the library and its community will benefit from more frequent, smaller releases.

That said, this release still has a bunch of new widgets and great improvements and fixes!

Added

• Touch support. Touch support #57 Touch support for PaneGrid and PickList #650 (thanks to @simlay and @discordance!)
• Clipboard write access for
  • TextInput widget. Write clipboard support and TextInput copy and cut behavior #770
  • Application::update. Clipboard access in Application::update #773
• image::Viewer widget. It allows panning and scaling of an image. Add image::Viewer widget #319 (thanks to @tarkah!)
• Tooltip widget. It annotates content with some text on mouse hover. Tooltip widget #465 (thanks to @yusdacra!)
• Support for the smol async runtime. Add smol async runtime support #699 (thanks to @JayceFayne!)
• Support for graceful exiting when using the Application trait. Graceful exiting for Application #804
• Image format features in iced_wgpu to reduce code bloat. Add image format options to reduce code bloat #392 (thanks to @unrelentingtech!)
• Focused and Unfocused variant to window::Event. add focus event #701 (thanks to @cossonleo!)
• WGPU_BACKEND environment variable to configure the internal graphics backend of iced_wgpu. Add WGPU_BACKEND environment variable #789 (thanks to @Cupnfish!)

Changed

• The TitleBar of a PaneGrid now supports generic elements. Generic Element Content in Pane Grid TitleBar #657 (thanks to @clarkmoody!)
• The Error type now implements Send and Sync. Make iced::Error Send + Sync #719 (thanks to @taiki-e!)
• The Style types in iced_style now implement Clone and Copy. impl Clone and Copy for all Style types in iced_style #720 (thanks to @taiki-e!)
• The following dependencies have been updated:
  • font-kit → 0.10 Update resvg and font-kit #669
  • glutin → 0.26 Update winit and glutin #658
  • resvg → 0.12 Update resvg and font-kit #669
  • tokio → 1.0 Update tokio to v1.0 #672 (thanks to @yusdacra!)
  • winit → 0.24 Update winit and glutin #658
  • wgpu → 0.7 Update to wgpu 0.7 #725 (thanks to @PolyMeilex!)
• The following examples were improved:
  • download_progress now showcases multiple file downloads at once. Improve download_progress example #283 (thanks to @Folyd!)
  • solar_system uses the new rand API. Update: rand in solar_system example #760 (thanks to @TriedAngle!)

Fixed

• Button events not being propagated to contents. Propagate Button events to contents #668
• Incorrect overlay implementation for the Button widget. Overwrite overlay method in Widget implementation for Button #764 (thanks to @thenlevy!)
• Viewport::physical_width returning the wrong value. Fix physical_width getter incorrectly returning the height #700 (thanks to @TannerRogalsky!)
• Outdated documentation for the Sandbox trait. update example description at sandbox's documentation #710 (thanks to @GunpowderGuy!)

Thank you to everyone involved! 🎉

Closes #538.
Closes #706.
Closes #805.