Dragging file paths cocoa

What A Drag! Stone All Rights Reserved The richness of the user interface in Macintosh OS X is due, in part, to the abundance of elements that allow dragging and dropping of data within and between applications. For example, Cocoa uses drag and drop for applying color swatches to text selections and objects. A library of resources allows users to drag in components, pages, effects, blends, images, and patterns. The user can quickly save a selection of graphics to one of many image formats with Create's "Image Well".

This article will cover the basics of creating a custom control which allows a user to drag in a file, and then allows the user to drag out the file. First, a bit of article administrivia.

Because of the changes introduced with each release and the several month lag time between penning articles and when MacTech hits the stands, there are times when what I've written doesn't jive with the current reality.

To address this, I've added a section to the Stone Design website for MacTech article updates and errata. So if you get confused, check out www. It's actually quite simple to create new types of user interface controls using Cocoa because of the well designed hierarchy of classes that comprise the Application framework.

However, you will have to override the methods to respond to entering your view with a drag, or releasing a drag, etc. So if you have a view that needs to accept drops of type MyCustomDropType , then you do:. Then your dragging methods will only fire if the drag has been declared to offer MyCustomDropType data. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

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Asked 11 years, 7 months ago. Active 9 years, 9 months ago. Viewed 2k times. Should I use the first responder? A init method or what? Improve this question. Add a comment. Active Oldest Votes. Links Link Colors Link Bookmarks. Report Error. Your message has been sent to W3Schools. W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning.

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