Dragging on with AppleScriptObjC

摘要

Many mainstream products interact with their users through drag-and-drop. So, for today, we look at the drag-and-drop mechanism and learn how it works with text data. We will examine the parts of a drag-and-drop event and the Cocoa protocols that correspond to each part. Then we focus on the NSTextView class and see how it implements drag-and-drop. We will also study how it behaves in three drag-and-drop scenarios.