There are various ways in which you can transfer data between two objects or applications. Drag and drop is a modern visual technique of transference of data between objects. It enables the user to copy and paste very intuitively. The drag and drop is a combination of two events, namely Dragging and Dropping. The widgets can serve as drag sites, drop sites, or as both. One of the important factors that we should take care of is the MIME type of the object that we would drag or drop. This is to ensure that the information can be transferred safely between applications. The various MIME types that are supported by Qt include plain text, HTML text, URI-list text, image data, and color data. We will explore the Qt classes that are used for this action and shortly test them with an example.

The various classes that are involved in drag and drop and their necessary MIME encoding and decoding are listed in the following table: