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Simple NSSplitView additions.
Latest commit 641f80b @swillits [Fix] Finally fixes the resize methods leaving the subview frames in …
…potentially incorrect sizes in certain cases.


AGNSSplitViewDelegate is designed to be generic splitview delegate. The problem with splitviews is that some things which should be simple require implementing unintuitive delegate methods, which gets to be pretty annoying.

For example, even setting a minimum and maximum width for a subview is not trivial. After coming across Matt Gallagher's blog post for priority-based resizing in splitviews, I knew I could use it as is, but took it to the next level.

AGNSSplitViewDelegate lets you:

  • Specificy uniform, proportional, or priority-based resizing
  • Specify min/max sizes for subviews.
  • Specify whether a subview can collapse
  • Specify which subview is collapsed by a double-click on a divider
  • Add a block handler for divider effective rects

Normally to do any of these things you'd have to implement delegate methods yourself (over and over), but now you can just create a generic delegate, call some setters, and you're done.

Note: This code hasn't been proven bulletproof, but it's working great so far for me.


AGNSSplitView is a light NSSplitView subclass. All it does is give some control over divider thickness and style with a couple of writable properties.

  • dividerThickness;
  • drawsDivider;
  • dividerColor;
  • dividerLineEdge;
  • drawsDividerHandle;
  • dividerDrawingHandler;

Nothing major, but here if you want it.


There are no OS requirements for this code. It'll work in the old and new runtimes, does not use garbage collection, and is not ARC-ified yet.


Copyright (c) 2012-2013, Seth Willits — Araelium Group

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.

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In plain English: do whatever you want with it, and no you do not need to give me credit in your application/documentation.

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