makepad-animation

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

You are an expert at Makepad animations. Help users by:

• Writing code: Generate animation code following the patterns below
• Answering questions: Explain states, transitions, timelines

Documentation

Refer to the local files for detailed documentation:

• ./references/animation-system.md - Complete animation reference

Advanced Patterns

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

Pattern	Description
06-animator-basics	Animator fundamentals
07-easing-functions	Easing and timing
08-keyframe-animation	Complex keyframes

IMPORTANT: Documentation Completeness Check

Before answering questions, Claude MUST:

1. Read the relevant reference file(s) listed above
2. 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
3. If reference file exists, incorporate its content into the answer

Key Patterns

1. Basic Hover Animation

<Button> {
    text: "Hover Me"

    animator: {
        hover = {
            default: off

            off = {
                from: { all: Forward { duration: 0.15 } }
                apply: {
                    draw_bg: { color: #333333 }
                }
            }

            on = {
                from: { all: Forward { duration: 0.15 } }
                apply: {
                    draw_bg: { color: #555555 }
                }
            }
        }
    }
}

2. Multi-State Animation

<View> {
    animator: {
        hover = {
            default: off
            off = {
                from: { all: Forward { duration: 0.2 } }
                apply: { draw_bg: { color: #222222 } }
            }
            on = {
                from: { all: Forward { duration: 0.2 } }
                apply: { draw_bg: { color: #444444 } }
            }
        }

        pressed = {
            default: off
            off = {
                from: { all: Forward { duration: 0.1 } }
                apply: { draw_bg: { scale: 1.0 } }
            }
            on = {
                from: { all: Forward { duration: 0.1 } }
                apply: { draw_bg: { scale: 0.95 } }
            }
        }
    }
}

3. Focus State Animation

<TextInput> {
    animator: {
        focus = {
            default: off

            off = {
                from: { all: Forward { duration: 0.2 } }
                apply: {
                    draw_bg: {
                        border_color: #444444
                        border_size: 1.0
                    }
                }
            }

            on = {
                from: { all: Forward { duration: 0.2 } }
                apply: {
                    draw_bg: {
                        border_color: #0066CC
                        border_size: 2.0
                    }
                }
            }
        }
    }
}

4. Disabled State

<Button> {
    animator: {
        disabled = {
            default: off

            off = {
                from: { all: Snap }
                apply: {
                    draw_bg: { color: #0066CC }
                    draw_text: { color: #FFFFFF }
                }
            }

            on = {
                from: { all: Snap }
                apply: {
                    draw_bg: { color: #333333 }
                    draw_text: { color: #666666 }
                }
            }
        }
    }
}

Animator Structure

Property	Description
animator	Root animation container
{state} =	State definition (hover, pressed, focus, disabled)
default:	Initial state value
{value} =	State value definition (on, off, custom)
from:	Transition timeline
apply:	Properties to animate

Timeline Types (Play Enum)

Type	Description
Forward { duration: f64 }	Linear forward animation
Snap	Instant change, no transition
Reverse { duration: f64, end: f64 }	Reverse animation
Loop { duration: f64, end: f64 }	Looping animation
BounceLoop { duration: f64, end: f64 }	Bounce loop animation

Easing Functions (Ease Enum)

// Basic
Linear

// Quadratic
InQuad, OutQuad, InOutQuad

// Cubic
InCubic, OutCubic, InOutCubic

// Quartic
InQuart, OutQuart, InOutQuart

// Quintic
InQuint, OutQuint, InOutQuint

// Sinusoidal
InSine, OutSine, InOutSine

// Exponential
InExp, OutExp, InOutExp

// Circular
InCirc, OutCirc, InOutCirc

// Elastic
InElastic, OutElastic, InOutElastic

// Back
InBack, OutBack, InOutBack

// Bounce
InBounce, OutBounce, InOutBounce

// Custom
ExpDecay { d1: f64, d2: f64 }
Bezier { cp0: f64, cp1: f64, cp2: f64, cp3: f64 }
Pow { begin: f64, end: f64 }

Using Easing

from: {
    all: Ease { duration: 0.3, ease: InOutQuad }
}

Common States

State	Values	Trigger
hover	on, off	Mouse enter/leave
pressed / down	on, off	Mouse press/release
focus	on, off	Focus gain/lose
disabled	on, off	Widget enabled/disabled
selected	on, off	Selection change

Animatable Properties

Most draw_* shader uniforms can be animated:

• Colors: color, border_color, shadow_color
• Sizes: border_size, border_radius, shadow_radius
• Transforms: scale, rotation, offset
• Opacity: opacity

When Writing Code

1. Always set default: for initial state
2. Use Forward for smooth transitions
3. Use Snap for instant state changes (like disabled)
4. Keep durations short (0.1-0.3s) for responsive feel
5. Animate shader uniforms in draw_bg, draw_text, etc.

Rust API (AnimatorImpl Trait)

pub trait AnimatorImpl {
    // Animate to state
    fn animator_play(&mut self, cx: &mut Cx, state: &[LiveId; 2]);

    // Cut to state (no animation)
    fn animator_cut(&mut self, cx: &mut Cx, state: &[LiveId; 2]);

    // Check current state
    fn animator_in_state(&self, cx: &Cx, state: &[LiveId; 2]) -> bool;
}

// Usage example
fn handle_event(&mut self, cx: &mut Cx, event: &Event, scope: &mut Scope) {
    match event.hits(cx, self.area()) {
        Hit::FingerHoverIn(_) => {
            self.animator_play(cx, id!(hover.on));
        }
        Hit::FingerHoverOut(_) => {
            self.animator_play(cx, id!(hover.off));
        }
        Hit::FingerDown(_) => {
            self.animator_play(cx, id!(pressed.on));
        }
        Hit::FingerUp(_) => {
            self.animator_play(cx, id!(pressed.off));
        }
        _ => {}
    }
}

When Answering Questions

1. States are independent - multiple can be active simultaneously
2. Animation applies properties when state reaches that value
3. from defines HOW to animate, apply defines WHAT to animate
4. Makepad tweens between old and new values automatically
5. Use id!(state.value) macro to reference animation states in Rust