PopoverPositionDelegate class

A delegate for computing the layout of a tooltip to be displayed above or below a target specified in the global coordinate system.

Inheritance

Constructors

PopoverPositionDelegate({required Offset position, required Size boxSize, required Offset? clickPosition, OffsetCalculator? offsetCalculator, ValueChanged<Size>? onSizeFind, OverflowAlgorithm? overflowAlgorithm, required double gap, required EdgeInsets? margin, required Placement placement, required ValueChanged<PlacementShift> onPlacementShift}): Creates a delegate for computing the layout of a tooltip.

boxSize → Size: final
clickPosition → Offset?: final
gap → double: The amount of vertical distance between the target and the displayed tooltip.
final
hashCode → int: The hash code for this object.
no setterinherited
margin → EdgeInsets?: final
offsetCalculator → OffsetCalculator?: final
onPlacementShift → ValueChanged<PlacementShift>: final
onSizeFind → ValueChanged<Size>?: final
overflowAlgorithm → OverflowAlgorithm?: final
placement → Placement: final
position → Offset: The offset of the target the tooltip is positioned near in the global coordinate system.
final
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited

clickOffset(double childHeight, double areaHeight) → Offset
getConstraintsForChild(BoxConstraints constraints) → BoxConstraints: The constraints for the child given the incoming constraints.
override
getPositionForChild(Size areaSize, Size overlaySize) → Offset: areaSize 容器尺寸 overlaySize 浮层尺寸 boxSize 目标组件尺寸 position 目标组件中心的坐标
override
getSize(BoxConstraints constraints) → Size: The size of this object given the incoming constraints.
override
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
shouldRelayout(covariant PopoverPositionDelegate oldDelegate) → bool: Called whenever a new instance of the custom layout delegate class is provided to the RenderCustomSingleChildLayoutBox object, or any time that a new CustomSingleChildLayout object is created with a new instance of the custom layout delegate class (which amounts to the same thing, because the latter is implemented in terms of the former).
override
toString() → String: A string representation of this object.
inherited