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# Objective Continue improving the user experience of our UI Node API in the direction specified by [Bevy's Next Generation Scene / UI System](https://github.com/bevyengine/bevy/discussions/14437) ## Solution As specified in the document above, merge `Style` fields into `Node`, and move "computed Node fields" into `ComputedNode` (I chose this name over something like `ComputedNodeLayout` because it currently contains more than just layout info. If we want to break this up / rename these concepts, lets do that in a separate PR). `Style` has been removed. This accomplishes a number of goals: ## Ergonomics wins Specifying both `Node` and `Style` is now no longer required for non-default styles Before: ```rust commands.spawn(( Node::default(), Style { width: Val::Px(100.), ..default() }, )); ``` After: ```rust commands.spawn(Node { width: Val::Px(100.), ..default() }); ``` ## Conceptual clarity `Style` was never a comprehensive "style sheet". It only defined "core" style properties that all `Nodes` shared. Any "styled property" that couldn't fit that mold had to be in a separate component. A "real" style system would style properties _across_ components (`Node`, `Button`, etc). We have plans to build a true style system (see the doc linked above). By moving the `Style` fields to `Node`, we fully embrace `Node` as the driving concept and remove the "style system" confusion. ## Next Steps * Consider identifying and splitting out "style properties that aren't core to Node". This should not happen for Bevy 0.15. --- ## Migration Guide Move any fields set on `Style` into `Node` and replace all `Style` component usage with `Node`. Before: ```rust commands.spawn(( Node::default(), Style { width: Val::Px(100.), ..default() }, )); ``` After: ```rust commands.spawn(Node { width: Val::Px(100.), ..default() }); ``` For any usage of the "computed node properties" that used to live on `Node`, use `ComputedNode` instead: Before: ```rust fn system(nodes: Query<&Node>) { for node in &nodes { let computed_size = node.size(); } } ``` After: ```rust fn system(computed_nodes: Query<&ComputedNode>) { for computed_node in &computed_nodes { let computed_size = computed_node.size(); } } ``` |
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| .. | ||
| borders.rs | ||
| box_shadow.rs | ||
| button.rs | ||
| display_and_visibility.rs | ||
| flex_layout.rs | ||
| font_atlas_debug.rs | ||
| ghost_nodes.rs | ||
| grid.rs | ||
| overflow.rs | ||
| overflow_clip_margin.rs | ||
| overflow_debug.rs | ||
| relative_cursor_position.rs | ||
| render_ui_to_texture.rs | ||
| scroll.rs | ||
| size_constraints.rs | ||
| text.rs | ||
| text_debug.rs | ||
| text_wrap_debug.rs | ||
| transparency_ui.rs | ||
| ui.rs | ||
| ui_material.rs | ||
| ui_scaling.rs | ||
| ui_texture_atlas.rs | ||
| ui_texture_atlas_slice.rs | ||
| ui_texture_slice.rs | ||
| ui_texture_slice_flip_and_tile.rs | ||
| viewport_debug.rs | ||
| window_fallthrough.rs | ||
| z_index.rs | ||