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POView-based NSTableView with rows that have dynamic heights
 

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  1. POView-based NSTableView with rows that have dynamic heights
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    <p>I have an application with a view-based <code>NSTableView</code> in it. Inside this table view, I have rows that have cells that have content consisting of a multi-row <code>NSTextField</code> with word-wrap enabled. Depending on the textual content of the <code>NSTextField</code>, the size of the rows needed to display the cell will vary. </p> <p>I know that I can implement the <code>NSTableViewDelegate</code> method -<code>tableView:heightOfRow:</code> to return the height, but the height will be determined based on the word wrapping used on the <code>NSTextField</code>. The word wrapping of the <code>NSTextField</code> is similarly based on how wide the <code>NSTextField</code> is… which is determined by the width of the <code>NSTableView</code>.</p> <p>Soooo… I guess my question is… what is a good design pattern for this? It seems like everything I try winds up being a convoluted mess. Since the TableView requires knowledge of the height of the cells to lay them out... and the <code>NSTextField</code> needs knowledge of it's layout to determine the word wrap… and the cell needs knowledge of the word wrap to determine it's height… it's a circular mess… and it's driving me <em>insane</em>.</p> <p>Suggestions?</p> <p>If it matters, the end result will also have editable <code>NSTextFields</code> that will resize to adjust to the text within them. I already have this working on the view level, but the tableview does not yet adjust the heights of the cells. I figure once I get the height issue worked out, I'll use the -<code>noteHeightOfRowsWithIndexesChanged</code> method to inform the table view the height changed… but it's still then going to ask the delegate for the height… hence, my quandry.</p> <p>Thanks in advance!</p>
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    1. USAndriy
    1. USJiva DeVoe
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      1. USJoshua Nozzi
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    1. COIf both the width and height of the view can change with their contents, then defining them is complicated because you have to iterate (but then you can cache). But your case seems to have a changing height for a constant width. If the width is known (i.e. based on the width of the window or view), then nothing here is complicated. I'm missing why the width is varible?
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      1. USRob Napier
    2. COOnly the height can change with the contents. And I've already solved that problem. I have an NSTextField subclass that adjusts it's height automatically. The problem is in getting knowledge of that adjustment back to the table view's delegate, so it can update the height accordingly.
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      1. USJiva DeVoe
    3. CO@Jiva: Wondering if you've solved this yet.
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      1. USJoshua Nozzi
 

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