func (e DropEffect) String() string {
	if int(e) < len(dropEffectNames) {
		return dropEffectNames[e]
	}
	return dropEffectUnknownStr
}

type DragData struct {
	// Kind is a type identifier for the dragged data (e.g., "text", "widget", "file").
	Kind	string

	// Payload is the actual data being dragged. The concrete type depends on Kind.
	Payload	any
}

type Feedback struct {
	// Effect is the current drop effect at the cursor position.
	Effect	DropEffect

	// Label is optional text displayed near the cursor during drag.
	Label	string
}

type DragSource interface {
	// DragStart is called when a drag operation begins (after the mouse
	// moves beyond the drag threshold). It returns the drag data and
	// whether the drag should be allowed.
	DragStart(pos geometry.Point) (DragData, bool)

	// DragEnd is called when a drag operation completes. The accepted
	// parameter is true if a DropTarget accepted the data, false if the
	// drag was canceled or no target accepted it.
	DragEnd(accepted bool)
}

type DropTarget interface {
	// CanAccept returns true if this target accepts data of the given kind.
	// This is called before DragEnter to quickly filter incompatible targets.
	CanAccept(data DragData) bool

	// DragEnter is called when the drag cursor enters the target's bounds.
	DragEnter(data DragData)

	// DragOver is called while the drag cursor moves over the target.
	// Returns the DropEffect to display as visual feedback.
	DragOver(data DragData, pos geometry.Point) DropEffect

	// DragLeave is called when the drag cursor leaves the target's bounds.
	DragLeave()

	// Drop is called when the data is released over the target.
	// Returns true if the target accepted the data.
	Drop(data DragData, pos geometry.Point) bool
}