The First Scroll To Refresh solution using only AppKit and Public APIs!
ScrollToRefresh is a subclass of NSScrollView that adds a "pull-to-refresh" feel to the "elastic" area of NSScrollview.
How it works
The secret is actually knowing how scroll views work. When you scroll, the clip view offsets the origin of its
-bounds so any subview within the clipview will scroll. It also employs a couple of other methods to check the boundaries of the document view which I override to include the refresh view to get a more natural feel.
ScrollToRefresh is licensed under the MIT license meaning you can do whatever you want with it and I am not responsible for any trouble you get and you must include the license in whatever you use it in.
// ScrollToRefresh // // Copyright (C) 2011 by Alex Zielenski. // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to deal // in the Software without restriction, including without limitation the rights // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN // THE SOFTWARE.