robius-widget-patterns

zhanghandong

CRITICAL: Use for Robius widget patterns. Triggers on: apply_over, TextOrImage, modal, 可复用, 模态, collapsible, drag drop, reusable widget, widget design, pageflip, 组件设计, 组件模式

Quick Install

bunx add-skill zhanghandong/makepad-skills -s robius-widget-patterns

appclaudeclaude-codecross-platformmakepadrust

Instructions

Robius Widget Patterns Skill

Best practices for designing reusable Makepad widgets based on Robrix and Moly codebase patterns.

Source codebases:

Robrix: Matrix chat client - Avatar, RoomsList, RoomScreen widgets
Moly: AI chat application - Slot, ChatLine, PromptInput, AdaptiveView widgets

Triggers

Use this skill when:

Creating reusable Makepad widgets
Designing widget component APIs
Implementing text/image toggle patterns
Dynamic styling in Makepad
Keywords: robrix widget, makepad component, reusable widget, widget design pattern

Production Patterns

For production-ready widget patterns, see the _base/ directory:

Pattern	Description
01-widget-extension	Add helper methods to widget references
02-modal-overlay	Popups, dialogs using DrawList2d overlay
03-collapsible	Expandable/collapsible sections
04-list-template

Loading…

Related Skills

flow

Use when you need to run Flow type checking, or when seeing Flow type errors in React code.

242,585

verify

Use when you want to validate changes before committing, or when you need to check all React contribution requirements.

242,585

feature-flags

Use when feature flag tests fail, flags need updating, understanding @gate pragmas, debugging channel-specific test failures, or adding new flags to React.

242,585

flags

Use when you need to check feature flag states, compare channels, or debug why a feature behaves differently across release channels.

242,582

use makepad_widgets::*;

live_design! {
    use link::theme::*;
    use link::widgets::*;

    pub MyWidget = {{MyWidget}} {
        width: Fill, height: Fit,
        flow: Down,

        // Child widgets defined in DSL
        inner_view = <View> {
            // ...
        }
    }
}

#[derive(Live, LiveHook, Widget)]
pub struct MyWidget {
    #[deref] view: View,              // Delegate to inner View

    #[live] some_property: f64,       // DSL-configurable property
    #[live(100.0)] default_val: f64,  // With default value

    #[rust] internal_state: State,    // Rust-only state (not in DSL)

    #[animator] animator: Animator,   // For animations
}

impl Widget for MyWidget {
    fn handle_event(&mut self, cx: &mut Cx, event: &Event, scope: &mut Scope) {
        self.view.handle_event(cx, event, scope);
        // Custom event handling...
    }

    fn draw_walk(&mut self, cx: &mut Cx2d, scope: &mut Scope, walk: Walk) -> DrawStep {
        self.view.draw_walk(cx, scope, walk)
    }
}

live_design! {
    pub Avatar = {{Avatar}} {
        width: 36.0, height: 36.0,
        align: { x: 0.5, y: 0.5 }
        flow: Overlay,  // Stack views on top of each other

        text_view = <View> {
            visible: true,  // Default visible
            show_bg: true,
            draw_bg: {
                uniform background_color: #888888
                fn pixel(self) -> vec4 {
                    let sdf = Sdf2d::viewport(self.pos * self.rect_size);
                    let c = self.rect_size * 0.5;
                    sdf.circle(c.x, c.x, c.x)
                    sdf.fill_keep(self.background_color);
                    return sdf.result
                }
            }
            text = <Label> {
                text: "?"
            }
        }

        img_view = <View> {
            visible: false,  // Hidden by default
            img = <Image> {
                fit: Stretch,
                width: Fill, height: Fill,
            }
        }
    }
}

#[derive(LiveHook, Live, Widget)]
pub struct Avatar {
    #[deref] view: View,
    #[rust] info: Option<UserInfo>,
}

impl Avatar {
    /// Show text content, hiding the image
    pub fn show_text<T: AsRef<str>>(
        &mut self,
        cx: &mut Cx,
        bg_color: Option<Vec4>,
        info: Option<AvatarTextInfo>,
        username: T,
    ) {
        self.info = info.map(|i| i.into());

        // Get first character
        let first_char = utils::first_letter(username.as_ref())
            .unwrap_or("?").to_uppercase();
        self.label(ids!(text_view.text)).set_text(cx, &first_char);

        // Toggle visibility
        self.view(ids!(text_view)).set_visible(cx, true);
        self.view(ids!(img_view)).set_visible(cx, false);

        // Apply optional background color
        if let Some(color) = bg_color {
            self.view(ids!(text_view)).apply_over(cx, live! {
                draw_bg: { background_color: (color) }
            });
        }
    }

    /// Show image content, hiding the text
    pub fn show_image<F, E>(
        &mut self,
        cx: &mut Cx,
        info: Option<AvatarImageInfo>,
        image_set_fn: F,
    ) -> Result<(), E>
    where
        F: FnOnce(&mut Cx, ImageRef) -> Result<(), E>
    {
        let img_ref = self.image(ids!(img_view.img));
        let res = image_set_fn(cx, img_ref);

        if res.is_ok() {
            self.view(ids!(img_view)).set_visible(cx, true);
            self.view(ids!(text_view)).set_visible(cx, false);
            self.info = info.map(|i| i.into());
        }
        res
    }

    /// Check current display status
    pub fn status(&mut self) -> DisplayStatus {
        if self.view(ids!(img_view)).visible() {
            DisplayStatus::Image
        } else {
            DisplayStatus::Text
        }
    }
}

// Apply single property
self.view(ids!(content)).apply_over(cx, live! {
    draw_bg: { color: #ff0000 }
});

// Apply multiple properties
self.view(ids!(message)).apply_over(cx, live! {
    padding: { left: 20, right: 20 }
    margin: { top: 10 }
});

// Apply with variables
let highlight_color = if is_selected { vec4(1.0, 0.0, 0.0, 1.0) } else { vec4(0.5, 0.5, 0.5, 1.0) };
self.view(ids!(item)).apply_over(cx, live! {
    draw_bg: { color: (highlight_color) }
});

impl AvatarRef {
    /// See [`Avatar::show_text()`].
    pub fn show_text<T: AsRef<str>>(
        &self,
        cx: &mut Cx,
        bg_color: Option<Vec4>,
        info: Option<AvatarTextInfo>,
        username: T,
    ) {
        if let Some(mut inner) = self.borrow_mut() {
            inner.show_text(cx, bg_color, info, username);
        }
    }

    /// See [`Avatar::show_image()`].
    pub fn show_image<F, E>(
        &self,
        cx: &mut Cx,
        info: Option<AvatarImageInfo>,
        image_set_fn: F,
    ) -> Result<(), E>
    where
        F: FnOnce(&mut Cx, ImageRef) -> Result<(), E>
    {
        if let Some(mut inner) = self.borrow_mut() {
            inner.show_image(cx, info, image_set_fn)
        } else {
            Ok(())
        }
    }
}

live_design! {
    pub CollapsibleSection = {{CollapsibleSection}} {
        flow: Down,

        header = <View> {
            cursor: Hand,
            icon = <Icon> { }
            title = <Label> { text: "Section" }
        }

        content = <View> {
            visible: false,
            // Expandable content here
        }
    }
}

#[derive(Live, LiveHook, Widget)]
pub struct CollapsibleSection {
    #[deref] view: View,
    #[rust] is_expanded: bool,
}

impl CollapsibleSection {
    pub fn toggle(&mut self, cx: &mut Cx) {
        self.is_expanded = !self.is_expanded;
        self.view(ids!(content)).set_visible(cx, self.is_expanded);

        // Rotate icon
        let rotation = if self.is_expanded { 90.0 } else { 0.0 };
        self.view(ids!(header.icon)).apply_over(cx, live! {
            draw_icon: { rotation: (rotation) }
        });

        self.redraw(cx);
    }
}

live_design! {
    pub LoadableContent = {{LoadableContent}} {
        flow: Overlay,

        content = <View> {
            visible: true,
            // Main content
        }

        loading_overlay = <View> {
            visible: false,
            show_bg: true,
            draw_bg: { color: #00000088 }
            align: { x: 0.5, y: 0.5 }
            <BouncingDots> { }
        }

        error_view = <View> {
            visible: false,
            error_label = <Label> { }
        }
    }
}

#[derive(Live, LiveHook, Widget)]
pub struct LoadableContent {
    #[deref] view: View,
    #[rust] state: LoadingState,
}

pub enum LoadingState {
    Idle,
    Loading,
    Loaded,
    Error(String),
}

impl LoadableContent {
    pub fn set_state(&mut self, cx: &mut Cx, state: LoadingState) {
        self.state = state;
        match &self.state {
            LoadingState::Idle | LoadingState::Loaded => {
                self.view(ids!(content)).set_visible(cx, true);
                self.view(ids!(loading_overlay)).set_visible(cx, false);
                self.view(ids!(error_view)).set_visible(cx, false);
            }
            LoadingState::Loading => {
                self.view(ids!(content)).set_visible(cx, true);
                self.view(ids!(loading_overlay)).set_visible(cx, true);
                self.view(ids!(error_view)).set_visible(cx, false);
            }
            LoadingState::Error(msg) => {
                self.view(ids!(content)).set_visible(cx, false);
                self.view(ids!(loading_overlay)).set_visible(cx, false);
                self.view(ids!(error_view)).set_visible(cx, true);
                self.label(ids!(error_view.error_label)).set_text(cx, msg);
            }
        }
        self.redraw(cx);
    }
}

live_design! {
    pub ItemsList = {{ItemsList}} {
        list = <PortalList> {
            keep_invisible: false,
            auto_tail: false,
            width: Fill, height: Fill,
            flow: Down,

            // Item templates
            item_entry = <ItemEntry> {}
            header = <SectionHeader> {}
            empty = <View> {}
        }
    }
}

impl Widget for ItemsList {
    fn draw_walk(&mut self, cx: &mut Cx2d, scope: &mut Scope, walk: Walk) -> DrawStep {
        while let Some(item) = self.view.draw_walk(cx, scope, walk).step() {
            if let Some(mut list) = item.as_portal_list().borrow_mut() {
                list.set_item_range(cx, 0, self.items.len());

                while let Some(item_id) = list.next_visible_item(cx) {
                    let item = list.item(cx, item_id, live_id!(item_entry));
                    // Populate item with data
                    self.populate_item(cx, item, &self.items[item_id]);
                    item.draw_all(cx, scope);
                }
            }
        }
        DrawStep::done()
    }
}

robius-widget-patterns

Robius Widget Patterns Skill

Triggers

Production Patterns

Related Skills

flow

verify

feature-flags

flags

Robius Widget Patterns Skill

Triggers

Production Patterns

Standard Widget Structure

Text/Image Toggle Pattern

Dynamic Styling with apply_over

Widget Reference Pattern

Collapsible/Expandable Pattern

Loading State Pattern

PortalList Item Pattern

Best Practices

Reference Files

Related Skills

flow

verify

feature-flags

flags