GestureDetector

GestureDetector control. Build it with the gesture_detector helper.

Example

gesture_detector(
  content: text("GestureDetector"),
  expand: true,
  width: 240,
  height: 120,
  on_tap: ->(event) {}
)

Properties

• adaptive — Adapts to the platform (Material/Cupertino) when true.
• allowed_devices — Sets the allowed devices property.
• content — The single child control rendered inside this control.
• drag_interval — Sets the drag interval property.
• exclude_from_semantics — Sets the exclude from semantics property.
• hover_interval — Sets the hover interval property.
• mouse_cursor — Cursor shown when hovering the control.
• multi_tap_touches — Sets the multi tap touches property.
• trackpad_scroll_causes_scale — Sets the trackpad scroll causes scale property.

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_double_tap — Fired on a double tap.
• on_double_tap_cancel — Fired on double tap cancel.
• on_double_tap_down — Fired on double tap down.
• on_enter — Fired when the pointer enters the control.
• on_exit — Fired when the pointer leaves the control.
• on_force_press_end — Fired on force press end.
• on_force_press_peak — Fired on force press peak.
• on_force_press_start — Fired on force press start.
• on_force_press_update — Fired on force press update.
• on_horizontal_drag_cancel — Fired on horizontal drag cancel.
• on_horizontal_drag_down — Fired on horizontal drag down.
• on_horizontal_drag_end — Fired on horizontal drag end.
• on_horizontal_drag_start — Fired on horizontal drag start.
• on_horizontal_drag_update — Fired on horizontal drag update.
• on_hover — Fired when the pointer enters/leaves the control.
• on_long_press — Fired on a long press.
• on_long_press_cancel — Fired on long press cancel.
• on_long_press_down — Fired on long press down.
• on_long_press_end — Fired on long press end.
• on_long_press_move_update — Fired on long press move update.
• on_long_press_start — Fired on long press start.
• on_long_press_up — Fired on long press up.
• on_multi_long_press — Fired on multi long press.
• on_multi_tap — Fired on multi tap.
• on_pan_cancel — Fired on pan cancel.
• on_pan_down — Fired on pan down.
• on_pan_end — Fired on pan end.
• on_pan_start — Fired on pan start.
• on_pan_update — Fired on pan update.
• on_right_pan_end — Fired on right pan end.
• on_right_pan_start — Fired on right pan start.
• on_right_pan_update — Fired on right pan update.
• on_scale_end — Fired on scale end.
• on_scale_start — Fired on scale start.
• on_scale_update — Fired on scale update.
• on_scroll — Fired when the scroll position changes.
• on_secondary_long_press — Fired on secondary long press.
• on_secondary_long_press_cancel — Fired on secondary long press cancel.
• on_secondary_long_press_down — Fired on secondary long press down.
• on_secondary_long_press_end — Fired on secondary long press end.
• on_secondary_long_press_move_update — Fired on secondary long press move update.
• on_secondary_long_press_start — Fired on secondary long press start.
• on_secondary_long_press_up — Fired on secondary long press up.
• on_secondary_tap — Fired on secondary tap.
• on_secondary_tap_cancel — Fired on secondary tap cancel.
• on_secondary_tap_down — Fired on secondary tap down.
• on_secondary_tap_up — Fired on secondary tap up.
• on_size_change — Fired when the control's size changes.
• on_tap — Fired on a tap.
• on_tap_cancel — Fired when a tap is cancelled.
• on_tap_down — Fired when a pointer presses down.
• on_tap_move — Fired on tap move.
• on_tap_up — Fired on tap up.
• on_tertiary_long_press — Fired on tertiary long press.
• on_tertiary_long_press_cancel — Fired on tertiary long press cancel.
• on_tertiary_long_press_down — Fired on tertiary long press down.
• on_tertiary_long_press_end — Fired on tertiary long press end.
• on_tertiary_long_press_move_update — Fired on tertiary long press move update.
• on_tertiary_long_press_start — Fired on tertiary long press start.
• on_tertiary_long_press_up — Fired on tertiary long press up.
• on_tertiary_tap_cancel — Fired on tertiary tap cancel.
• on_tertiary_tap_down — Fired on tertiary tap down.
• on_tertiary_tap_up — Fired on tertiary tap up.
• on_vertical_drag_cancel — Fired on vertical drag cancel.
• on_vertical_drag_down — Fired on vertical drag down.
• on_vertical_drag_end — Fired on vertical drag end.
• on_vertical_drag_start — Fired on vertical drag start.
• on_vertical_drag_update — Fired on vertical drag update.

Reference

• Family: shared
• Widget type: gesturedetector
• Helpers: gesture_detector, gesturedetector