Nsarraycontroller selection not updating

Posted by / 04-Nov-2017 09:32

To be able to display our information in the view, the view needs to maintain its own store of the data.We’ll maintain one array of segment names and one array of segment values.There are many different ways to go about displaying such a chart; what follows is the path I decided to take.

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In this post I’ll walk through writing a custom subclass of NSView that can bind to an NSArray Controller to display information either from some generic array connected to the array controller, or from a Core Data object model.

The view we’ll be creating is a custom view to display a pie-chart; in the sample app the pie-chart will be drawn from data entered in an NSTable View.

The segments on our pie-chart have both a ‘name’ and a numeric ‘value’ so, in the same way that you can bind a model’s keys to different column tables in an NSTable View, we’ll make it possible to bind a model’s keys to the names and values on the pie-chart.

This would allow us to bind, for example, a department’s employees’ ‘full Names’ and their ‘salaries’ to view relative salaries, or in a file-viewing application, ‘file Names’ and ‘file Sizes’ etc.

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