Sorry for the delayed response, it's been a busy day.
It's been a while since I have touched Lingo, so I won't comment
there, but yah it's basically a list of properties. Associative
arrays can be accessed in two ways. First:
listRelationships:Object = new Object();
listRelationships["propertyName"] = "foo";
trace(listRelationships["propertyName"]);
and second:
listRelationships:Object = new Object();
listRelationships.propertyName = "foo";
trace(listRelationships.propertyName);
The two syntaxes are equivalent and interchangeable. I used the first
syntax because it easily allows you to access properties by name,
passed through another variable.
var itemID:String = "itemID1";
trace(listRelationships[itemID]);
You would create your full data structure, each line representing one
list item and containing an array of IDs linked to the given ID.
Ideally you would pull this data in from an external source, such as
through XML or through LoadVars, and build this data structure
dynamically. Also, this is only one way of doing it. Another way may
be more appropriate for you, given your particular requirements.
var listRelationships:Object = new Object();
listRelationships["itemID1"] = ["itemID2", "itemID3"];
listRelationships["itemID2"] = ["itemID1"];
listRelationships["itemID3"] = ["itemID1", "itemID3"];
...
listRelationships["itemIDN"] = ["itemID6", "itemID7", "itemID8"];
When one of the items is selected or moused over, you call a function
that you create, pass in the ID of the item in question, and use that
ID to find the related IDs:
function handleSelect(itemID:String):Void
{
var selectedItemData:Array = listRelationships[itemID];
for (var i:Number = 0; i < selectedItemData.length; i++)
{
// Get each row that should also be highlighted
trace(selectedItemData[i]);
}
}
I hope this helps.
Nathan
http://www.nathanderksen.com
On Jan 30, 2006, at 9:26 AM, Kent Humphrey wrote:
On 30 Jan 2006, at 17:13, Nathan Derksen wrote:
Well, regardless of whether or not you use listeners, you still
need to create the data relationship. I don't think encoding the
relationships into 25 listeners is necessarily a good idea,
either. An associative array, indexed by ID, could store the IDs
of the other list items that are related, all in a single data
structure. So for instance:
listRelationships["itemID1"] = ["itemID2", "itemID3"];
listRelationships["itemID2"] = ["itemID1"];
listRelationships["itemID3"] = ["itemID2"];
This allows you to store arbitrary relationships between each list
item. When a list item is moused over, just grab listRelationships
[itemID] and you will get a corresponding array of list items to
highlight.
Nathan
http://www.nathanderksen.com
That sounds a bit more like where I'm at. Not that I've used
associative arrays before, but they're basically the same as
property lists in Lingo right?
In your above example, wont I still need a listRelationships
["itemID1"] = [whatever] line for each item I'm wanting to
reference? Or have I totally misunderstood what's going on there?
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