An array of blocks that provide the dragging image components.
- macOS 10.7+
The dragging image is the composite of an array of
The dragging image components are not set directly. Instead, a block is used to generate the components and the block is called if necessary.
The block may be set to
nil, meaning that this drag item has no image. Generally, only dragging destinations do this, and only if there is at least one valid item in the drop, and the receiver is not that object.
The components are composited in painting order. That is, each component in the array is painted on top of the previous components in the array.