makepad-event-action

"|"

Aller à l'installation

Dépôt: BEKO2210/Firstbrain
Dernière activité de la source: 17 mai 2026 à 12:40
Langue détectée de SKILL.md: anglais
Étoiles: 15
Forks: 2

Options d'installation

Le prompt qui vérifie d'abord la source est sélectionné par défaut. Vous pouvez passer à une commande directe ou télécharger une copie locale.

Vérifiez les fichiers source

Lisez SKILL.md et les fichiers associés affichés par SkillsMP avant de décider de l'installer.

Retour à la recherche Retour à l’installation

name	makepad-event-action
description	\|
type	skill
created	2026-02-27T00:00:00.000Z
domain	software-development
category	frontend
risk	safe
source	community
tags	["skill","software-development","frontend","makepad","event","action"]

Makepad Event/Action Skill

Version: makepad-widgets (dev branch) | Last Updated: 2026-01-19

Check for updates: https://crates.io/crates/makepad-widgets

You are an expert at Makepad event and action handling. Help users by:

Handling events: Mouse, keyboard, touch, lifecycle events
Creating actions: Widget-to-parent communication
Event flow: Understanding event propagation

When to Use

You need to handle input, lifecycle, or UI interaction events in Makepad.
The task involves handle_event, Event variants, Hit processing, or widget action propagation.
You need to design or debug Makepad event/action flow between widgets and parents.

Documentation

Refer to the local files for detailed documentation:

./references/event-system.md - Event enum and handling
./references/action-system.md - Action trait and patterns

IMPORTANT: Documentation Completeness Check

Before answering questions, Claude MUST:

Read the relevant reference file(s) listed above
If file read fails or file is empty:
- Inform user: "本地文档不完整，建议运行 /sync-crate-skills makepad --force 更新文档"
- Still answer based on SKILL.md patterns + built-in knowledge
If reference file exists, incorporate its content into the answer

Event Enum (Key Variants)

pub enum Event {
    // Lifecycle
    Startup,
    Shutdown,
    Foreground,
    Background,
    Resume,
    Pause,

    // Drawing
    Draw(DrawEvent),
    LiveEdit,

    // Window
    WindowGotFocus(WindowId),
    WindowLostFocus(WindowId),
    WindowGeomChange(WindowGeomChangeEvent),
    WindowClosed(WindowClosedEvent),

    
    (MouseDownEvent),
    (MouseMoveEvent),
    (MouseUpEvent),
    (ScrollEvent),

    
    (TouchUpdateEvent),

    
    (KeyEvent),
    (KeyEvent),
    (TextInputEvent),
    (TextClipboardEvent),

    
    (TimerEvent),
    (NextFrameEvent),

    
    (HttpResponse),

    
    (ActionsBuf),
}

impl Widget for MyWidget {
    fn handle_event(&mut self, cx: &mut Cx, event: &Event, scope: &mut Scope) {
        // Check if event hits this widget's area
        match event.hits(cx, self.area()) {
            Hit::FingerDown(fe) => {
                // Mouse/touch down on this widget
                cx.action(MyWidgetAction::Pressed);
            }
            Hit::FingerUp(fe) => {
                if fe.is_over {
                    // Released while still over widget = click
                    cx.action(MyWidgetAction::Clicked);
                }
            }
            Hit::FingerHoverIn(_) => {
                self.animator_play(cx, id!(hover.on));
            }
            Hit::FingerHoverOut(_) => {
                self.animator_play(cx, id!(hover.off));
            }
            Hit::KeyDown(ke) => {
                if ke.key_code == KeyCode::Return {
                    cx.action(MyWidgetAction::Submitted);
                }
            }
            _ => {}
        }
    }
}

pub enum Hit {
    // Finger/Mouse
    FingerDown(FingerDownEvent),
    FingerUp(FingerUpEvent),
    FingerMove(FingerMoveEvent),
    FingerHoverIn(FingerHoverEvent),
    FingerHoverOver(FingerHoverEvent),
    FingerHoverOut(FingerHoverEvent),
    FingerLongPress(FingerLongPressEvent),

    // Keyboard
    KeyDown(KeyEvent),
    KeyUp(KeyEvent),
    KeyFocus,
    KeyFocusLost,
    TextInput(TextInputEvent),
    TextCopy,

    // Nothing
    Nothing,
}

#[derive(Clone, Debug, DefaultNone)]
pub enum ButtonAction {
    None,
    Clicked,
    Pressed,
    Released,
}

// DefaultNone derives Default returning None variant

// From main thread (in handle_event)
cx.action(ButtonAction::Clicked);

// From any thread (thread-safe)
Cx::post_action(MyAction::DataLoaded(data));

fn handle_event(&mut self, cx: &mut Cx, event: &Event, scope: &mut Scope) {
    // Handle child widget actions
    let actions = cx.capture_actions(|cx| {
        self.button.handle_event(cx, event, scope);
    });

    // Check for specific action
    if self.button(id!(my_button)).clicked(&actions) {
        // Button was clicked
    }

    // Or iterate actions
    for action in actions.iter() {
        if let Some(ButtonAction::Clicked) = action.downcast_ref() {
            // Handle click
        }
    }
}

// Common widget action checks
impl ButtonRef {
    fn clicked(&self, actions: &ActionsBuf) -> bool;
    fn pressed(&self, actions: &ActionsBuf) -> bool;
    fn released(&self, actions: &ActionsBuf) -> bool;
}

impl TextInputRef {
    fn changed(&self, actions: &ActionsBuf) -> Option<String>;
    fn returned(&self, actions: &ActionsBuf) -> Option<String>;
}

// Start a timer
let timer = cx.start_timer(1.0); // 1 second

// In handle_event
if let Event::Timer(te) = event {
    if te.timer_id == self.timer {
        // Timer fired
    }
}

// Request next frame callback
let next_frame = cx.new_next_frame();

// In handle_event
if let Event::NextFrame(ne) = event {
    if ne.frame_id == self.next_frame {
        // Next frame arrived
    }
}