Class MarginPlacement

Namespace

Icy.Design.Editor.Placement

Assembly

IcyUI.Design.dll

The fallback placement: an element moves by its margin, alignment-aware, and resizes by its size (or, on a stretched axis, by the margin on the dragged side). Used for any container without a registered strategy.

public class MarginPlacement : IPlacementStrategy

Inheritance

object

MarginPlacement

Implements

IPlacementStrategy

Derived

GridPlacement

StackPanelPlacement

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Extension Methods

PropertyReferencesExtensions.ContainsProperty(object, IPropertyReference)

Remarks

A container whose markup content is a single slot (a Border's child, a ContentControl's content) accepts a dropped element only when the slot is empty.

Properties

OwnedAttributes

Gets the attributes that only mean something inside this kind of container, such as Grid.Row. They're removed from an element that moves into a different container.

public virtual IReadOnlyList<string> OwnedAttributes { get; }

Property Value

IReadOnlyList<string>

Methods

AcceptsDrop(PlacementContext)

Decides whether the container can take a dropped element at all.

protected virtual bool AcceptsDrop(PlacementContext context)

Parameters

context PlacementContext

The container and the dragged element.

Returns

bool

true for list containers and for an empty single slot; false for a filled single slot that doesn't already hold the element.

BeginResize(PlacementContext, ResizeHandle)

Starts resizing an element of this container from handle.

public virtual IResizeOperation BeginResize(PlacementContext context, ResizeHandle handle)

Parameters

context PlacementContext

The container and the element, as they were when the gesture started.

handle ResizeHandle

The dragged handle.

Returns

IResizeOperation

The operation to update while the pointer moves.

CurrentIndex(PlacementContext)

Gets the element's current content index, so a move inside the same container keeps its order.

protected static int CurrentIndex(PlacementContext context)

Parameters

context PlacementContext

The container and the element.

Returns

int

The index MoveElement(NodeId, NodeId, int) would leave unchanged.

GetDropTarget(PlacementContext, Vector2)

Decides where an element dropped at point lands.

public virtual PlacementTarget? GetDropTarget(PlacementContext context, Vector2 point)

Parameters

context PlacementContext

The container and the dragged element.

point Vector2

Where the dragged element's top-left corner would be, in the container's local space.

Returns

PlacementTarget

The target, or null when the container can't take the element.