Re: Strange problem drawing a custom grid in NSTableView
Re: Strange problem drawing a custom grid in NSTableView
- Subject: Re: Strange problem drawing a custom grid in NSTableView
- From: Corbin Dunn <email@hidden>
- Date: Thu, 10 Feb 2011 15:58:49 -0800
override -drawRect: in NSTableView; just call [super drawRect:] and don't do anything else. Does that fix it?
corbin
On Feb 10, 2011, at 2:51 PM, Eric Gorr wrote:
> I've got a sample project demonstrating the problem:
>
> http://ericgorr.net/cocoadev/TableViewGridDrawing.zip
>
> I've included a screen recording showing the problem as well.
>
> Basically, I need to drawn some vertical column line in a column. Since, in the real case, these lines would be drawn for only some of the columns, I need to completely customize the -drawGridInClipRect: method.
>
> So,, the problem is that the rightmost line is not always drawn while I am resizing a column and it goes off the right edge and comes back.
>
> Whether the last line is drawn or not seems to be dependent upon how fast I am resizing a column.
>
> If I let the mouse button go and start again, the last line is drawn immediately.
>
> As best as I can determine there is some kind of caching of the grid lines going on because I can see my drawing code being called, but not see the complete result appear in the table.
>
> All of the other lines draw as expected.
>
> I thought it might be a clipping issue, but I do not believe that is the case.
>
> If anyone has any thoughts, I would be interested.
>
> Thank you.
>
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