New

• Window layouts! You can create subplots with arbitrary rects/extents on the canvas, move and resize them! From #740.
  See the Examples Gallery to learn how to create them.

• Bidirectional events are supported! No changes in the API, just add event handlers as you normally would without worrying about recursion if you end up with cycles in your event graph. 😄 #744
• #771 , not officially documented for now, the way in which you access this might change in the future but we plan to keep this because it's very useful

Breaking

• Subplot.set_title no longer exists, use Subplot.title = "new_title_text". Subplot.title will return a TextGraphic that you can further format.
• The prototype video recorder (which wasn't really exposed) has been removed since it was very wonky. Once #765 is done we will have a proper way to create a video.

What's Changed

• Update governance by @clewis7 in #719
• removes size attribute use for histogram component of imagewidget by @apasarkar in #712
• fit old rtd links in faq by @kushalkolar in #720
• bump version to 0.4.0 by @kushalkolar in #713
• Update WGPU_FORCE_OFFSCREEN to RENDERCANVAS_FORCE_OFFSCREEN by @kushalkolar in #723
• Get nearest graphics indices by @FlynnOConnell in #699
• replace weird quotes, update GraphicMethodsMixin by @kushalkolar in #735
• move viewport rect logic from subplot and docks to Figure by @kushalkolar in #724
• remove old video writer code by @kushalkolar in #736
• Update CONTRIBUTING.md by @kushalkolar in #737
• add kmeans clustering example by @clewis7 in #734
• implemenet @block_reentrance decorator by @kushalkolar in #744
• docs via ssh by @kushalkolar in #751
• Rectangle/bbox layouts in a Figure by @kushalkolar in #740
• fix comment, fix doc example readme file by @kushalkolar in #769
• Imgui stats by @kushalkolar in #771
• update gov and CoC about LLM spam by @kushalkolar in #774
• soft pin to pygfx~=0.9.0 for fpl release v04.0 by @kushalkolar in #775

Full Changelog: v0.3.0...v0.4.0