Re: Implementing a Slightly Unusual NSTableView

FROM : Peter Zegelin
DATE : Sun Apr 20 12:51:45 2008

On 20/04/2008, at 7:28 PM, Graham Cox wrote:

> Hi Peter,
>
> You'll note my code says nothing about first responder, so you 
> should get whatever the table view is set to do. In my use of this 
> code, my table view is actually in a floating window and I've set it 
> only to become key if needed - and so for changing selection or 
> toggling checkboxes, it doesn't.
>
> Your situation sounds a bit different so I haven't tested for it, 
> but note that for all other columns, I call [super mouseDown:...] so 
> I would think that you should get completely normal behaviour for 
> these columns.
>
> I think what you're saying is that the view is focused before you 
> get the mouseDown: passed to you, so it focuses the table before you 
> get a chance to handle the checkbox (and prevent focusing). That 
> being the case you could turn the problem on its head - set the 
> table view to refuse first responder generally, then in the 
> mouseDown: method deliberately make it the first responder if the 
> mouse hits any of the other columns. No idea if this will work, but 
> worth a try?


Yes thats what I'm after - I tried something like your suggestion and 
it didn't quite work. I'm probably doing something wrong so I will 
experiment further.
>
>
> As an aside: I also use this code for a simple UI to a drawing 
> program's layers - I found that letting the table grab focus unless 
> it's actually editing the layer's name exceedingly annoying - it 
> takes focus away from the drawing content view itself, which gets 
> old very fast. So setting the table to never accept focus (unless 
> editing) is much more usable, I found. If you still want a decent 
> strong highlight for the selected layer rather than a washed-out 
> grey then you can override other bits of the table view to draw it 
> however you want.


Yep thats exactly what I am trying to avoid. However my layer table 
allows cut, copy and paste etc. of the layers themselves as well so I 
need to be able to select the rows when not clicking on a checkbox.

I reckon I'm close - and thanks for your help,

Peter
>
>
> G.
>
>
> On 20 Apr 2008, at 5:06 pm, Peter Zegelin wrote:

>> Hi Graham,
>>
>>     This is great - worked like a charm first time. Many, many thanks!
>>
>> The only thing I think I need to do now is to get the TableView to 
>> become first responder when I don't click on a checkbox. I think 
>> I'm nearly there as well. What I have done is make the tableview 
>> accept firstResponder and then added:
>>
>> [[self window] makeFirstResponder:nil];
>>
>> in the mousDown of the TableView - just before I begin tracking the 
>> cell. This prevents the tableView from becoming first responder 
>> unless I click on a normal column. Only problem of course is that 
>> the view that *was* the first responder now loses the focus. I tried:
>>
>> [[self window] makeFirstResponder: [[self window] firstResponder]];
>>
>> to see if I could set the firstResponder back to what it was, but 
>> by the time I've clicked on the table it is already the first 
>> responder.
>>
>> Any suggestions how I could prevent my table from becoming first 
>> responder when I click on a checkbox using your code?
>>
>> thanks again for your help,
>>
>> Peter
>>

>