TemporaryConnection class

Represents a temporary connection during a drag-and-drop operation.

A TemporaryConnection is created when a user starts dragging from a port and is updated as the mouse/pointer moves. It becomes a permanent connection when dropped on a valid target port, or is discarded if the drag is cancelled.

Immutable Properties (Set at Start)

• startPoint: Where the connection starts (source port position)
• sourceNodeId: ID of the source node
• sourcePortId: ID of the source port

Observable Properties (Change During Drag)

• currentPoint: Current pointer position
• targetNodeId: ID of the target node (null until hovering over valid target)
• targetPortId: ID of the target port (null until hovering over valid target)

Usage Example

// Create when drag starts
final tempConnection = TemporaryConnection(
  startPoint: portPosition,
  sourceNodeId: 'node-1',
  sourcePortId: 'port-out',
  initialCurrentPoint: portPosition,
);

// Update as pointer moves
tempConnection.currentPoint = newPointerPosition;

// Set target when hovering over a valid port
tempConnection.targetNodeId = 'node-2';
tempConnection.targetPortId = 'port-in';

See also:

• Connection for permanent connections
• NodeFlowController for managing temporary connections