helios/engine/modules/ui/widgets/systems/README.md File

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namespace	systems
	UI widget processing systems. More...

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 # helios::engine::modules::ui::widgets::systems

 

 UI widget processing systems.

 

 This namespace contains systems that process UI widget components, handling tasks such as navigation, styling, and bounds updates.

 

 ## Systems

 

 | System | Description |

 |--------|-------------|

 | `MenuNavigationSystem` | Handles gamepad input for menu navigation |

 | `UiStyleUpdateSystem` | Applies visual styles based on interaction state |

 | `UiTextBoundsUpdateSystem` | Updates AABB bounds when text content changes |

 

 ## MenuNavigationSystem

 

 Processes gamepad Up/Down input to change menu selection and A button to activate items. Updates `UiStateComponent` selection state and issues `UiActionCommand` on activation.

 

 ## UiStyleUpdateSystem

 

 Queries entities with `UiTextComponent`, `UiStyleComponent`, and `UiStateComponent`. Applies appropriate colors and scales based on the current interaction state (normal, selected, disabled).

 

 ## UiTextBoundsUpdateSystem

 

 Queries entities with `UiTextComponent` and `ModelAabbComponent`. When the text component signals `needsResize()`, the system retrieves the new AABB from the underlying `TextRenderable` and updates `ModelAabbComponent`.

 

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 <details>

 <summary>Doxygen</summary><p>

 @namespace helios::engine::modules::ui::widgets::systems

 @brief UI widget processing systems.

 @details Contains systems for processing UI widget state changes including menu navigation, style application, and AABB bounds synchronization with text content.

 </p></details>

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