Custom Property Data Limit?

dunbarx at aol.com dunbarx at aol.com
Thu Dec 1 18:42:42 CST 2011


Just for the hell of it, I made a custom property of a button with one billion chars, 100,000,000 lines of ten chars. If I ask it for line, say, 28455999, it gives it instantly.


Craig Newman



-----Original Message-----
From: Michael Doub <mike at doub.com>
To: How to use LiveCode <use-livecode at lists.runrev.com>
Sent: Thu, Dec 1, 2011 2:27 pm
Subject: Re: Custom Property Data Limit?


Bob, 

Using the GetDataForLine Callback is the technique that I was referring to that 
forces you to have a fixed row height.  

See:
http://lessons.runrev.com/s/lessons/m/datagrid/l/7341-Displaying-Large-Amounts-of-Data


-= Mike



On 2011-12-01, at 6:45 PM, Bob Sneidar wrote:

> I do not know what that means. At any rate, let me remind everyone that 
sqlYoga produces arrays that are compatible with datagrids, so that a simple 
query for all the records or even a subset of records, and then set the dgData 
of group "myDataGrid" to theDataA or something of the sort. 
> 
> for updates, you could do something like trap selectionChanged in the datagrid 
script (and I think there is also a way to determine what the last selected row 
was) so that you can put together an update query whenever the selection 
changes. Just make sure your datagrid and sql columns match up. 
> 
> But even without sqlYoga a loop can be written to parse the cursor out to an 
array. That is what sqlYoga does internally anyway. But you would also have to 
get a list of the columns in the table so you could set the keys of the array 
properly. It's a bit more complicated that way. 
> 
> Bob
> 
> 
> On Dec 1, 2011, at 1:26 PM, mike at doub.com wrote:
> 
>> I found that when going to the database approach and directly feeding the 
database you are limited to a fixed row height datagrid. 
>> 
>> -= Mike
> 
> 
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