SubmenuButton

SubmenuButton control. Build it with the submenu_button helper.

Example

submenu_button(
  content: text("SubmenuButton"),
  leading: icon("menu"),
  trailing: icon("chevron_right"),
  expand: true,
  on_animation_end: ->(event) {}
)

Properties

• alignment_offset — Sets the alignment offset property.
• clip_behavior — How content overflowing the bounds is clipped.
• content — The single child control rendered inside this control.
• controls — The list of child controls.
• leading — Control placed before the main content (e.g. an icon or avatar).
• menu_style — Menu style.
• style — Style overrides for the control.
• trailing — Control placed after the main content.

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_blur — Fired when the control loses focus.
• on_close — Fired on close.
• on_focus — Fired when the control gains focus.
• on_hover — Fired when the pointer enters/leaves the control.
• on_open — Fired when the control opens.
• on_size_change — Fired when the control's size changes.

Reference

• Family: materials
• Widget type: submenubutton
• Helpers: submenu_button, submenubutton