BottomAppBar

BottomAppBar control. Build it with the bottom_app_bar helper.

Example

bottom_app_bar(
  content: text("BottomAppBar"),
  bgcolor: :surface_container_high,
  expand: true,
  width: 240,
  on_animation_end: ->(event) {}
)

Properties

• bgcolor — Background color.
• border_radius — Corner radius.
• clip_behavior — How content overflowing the bounds is clipped.
• content — The single child control rendered inside this control.
• elevation — Shadow depth (z-height).
• notch_margin — Sets the notch margin property.
• padding — Inner spacing between the border and the content.
• shadow_color — Color of the drop shadow.
• shape — Shape/border of the control.

Common layout and animation properties

• align — Alignment of the control within its parent.
• animate_align — Animates alignment changes.
• animate_margin — Animates margin changes.
• animate_offset — Animates offset changes.
• animate_opacity — Animates opacity changes.
• animate_position — Animates position changes.
• animate_rotation — Animates rotation changes.
• animate_scale — Animates scale changes.
• animate_size — Animates size changes.
• aspect_ratio — Width-to-height ratio to maintain.
• badge — Badge drawn on the corner of the control.
• bottom — Bottom offset when positioned inside a stack.
• col — Responsive column span (1-12) per breakpoint.
• data — Arbitrary value you can attach to the control and read back in handlers.
• disabled — Disables interaction when true.
• expand — Fills the available space along the parent's main axis when true.
• expand_loose — Like expand, but only grows up to the child's natural size.
• height — Fixed height in logical pixels.
• key — Stable identity used to preserve state across rebuilds.
• left — Left offset when positioned inside a stack.
• margin — Outer spacing around the control.
• offset — Translation offset applied to the control.
• opacity — Opacity from 0.0 (transparent) to 1.0 (opaque).
• right — Right offset when positioned inside a stack.
• rotate — Rotation applied to the control.
• rtl — Renders right-to-left when true.
• scale — Scale transform applied to the control.
• size_change_interval — Throttle interval for on_size_change, in ms.
• tooltip — Text shown on hover/long-press.
• top — Top offset when positioned inside a stack.
• visible — Hides the control when false.
• width — Fixed width in logical pixels.

Events

• on_animation_end — Fired when an animation completes.
• on_size_change — Fired when the control's size changes.

Reference

• Family: materials
• Widget type: bottomappbar
• Helpers: bottom_app_bar, bottomappbar