Can I use these patterns for desktop and web applications?

Yes. While developed for the Robius mobile ecosystem, these Makepad patterns are fully compatible with desktop and WASM-based web applications built in Rust.

How does this skill handle asynchronous actions in Makepad?

It implements the Cx::post_action pattern combined with SignalToUI::set_ui_signal() to safely pass data from background tasks to the main UI thread for the next event cycle.

What is the purpose of the DefaultNone derive in Robius actions?

It ensures all action enums have a standard None variant, which is required for Makepad's internal action processing, casting, and avoiding optional wrapping.

What is the difference between widget actions and global actions?

Widget actions are scoped to specific UI components and emitted via cx.widget_action, while global actions are used for app-wide state changes and are usually handled via direct downcasting.

Robius Event & Action Patterns

Name: Robius Event & Action Patterns
Author: ZhangHanDong

byZhangHanDong

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699

Mobile Development

Implements robust event handling and custom action patterns for Makepad-based Rust applications.

About

This skill provides comprehensive guidance for managing events and actions within the Makepad framework, drawing from established patterns in the Robrix and Moly codebases. It enables developers to define domain-specific actions, handle widget-to-widget communication, and centralize application logic using the MatchEvent trait. By streamlining hit testing, keyboard interactions, and async action posting, it ensures responsive and maintainable cross-platform UI architectures for developers building with the Robius ecosystem.

Key Features

Implementing centralized action handling using the MatchEvent trait
Managing widget-to-widget communication and action chaining
699 GitHub stars
Defining domain-specific custom action enums with DefaultNone
Standardizing hit testing for mouse, touch, and keyboard events
Handling asynchronous updates with Cx::post_action and UI signals

Use Cases

Connecting background async tasks to the UI thread for real-time data updates
Refactoring messy event logic into a clean, centralized app-level handler
Building complex interactive widgets like chat lists or navigation menus in Makepad

About

Key Features

Implementing centralized action handling using the MatchEvent trait
Managing widget-to-widget communication and action chaining
699 GitHub stars
Defining domain-specific custom action enums with DefaultNone
Standardizing hit testing for mouse, touch, and keyboard events
Handling asynchronous updates with Cx::post_action and UI signals

Use Cases

Connecting background async tasks to the UI thread for real-time data updates
Refactoring messy event logic into a clean, centralized app-level handler
Building complex interactive widgets like chat lists or navigation menus in Makepad