Create a Non-Database-Driven Lookup - containers

Question

Lots of references for creating lookups out there, but all seem to draw their values from a query.
I want to add a lookup to a field that will add items from a list of values that do not come from a table, query, or any other data source.
Such as from a string: "Bananas, Apples, Oranges"
..or a container ["Bananas", "Apples", "Oranges"]
Assume the string/container is a dynamic object. Drawing from an static enum is not a choice.
Is there a way to create lookups on the fly from something other than a data source?
Example code would be a great help, but I'll take hints as well.

Answer 1

There is the color picker.
Also in the Global you will find pickXxxx such as pickList.
There are others, pickUser, pickUserGroup etc.
Take a look on the implementation. I guess they build a temporary table then displays that. Tables are great!
Update:
To go on you own follow the rules.
For the advanced user, see also: Lookup form returning more than one value.

Answer 2

public void lookup()
{
SysTableLookup sysTableLookup;
TmpTableFieldLookup tmpTableFieldLookup;
Enumerator en;
List entitylist = new list(types::String);
entitylist.addend("Banana");
entitylist.addend("Apple");
en = entityList.getEnumerator();
while (en.moveNext())
{
tmpTableFieldLookup.TableName = en.current();
tmpTableFieldLookup.insert();
}
sysTableLookup = SysTableLookup::newParameters(tableNum(tmpTableFieldLookup), this);
sysTableLookup.addLookupfield(fieldNum(TmpTableFieldLookup, TableName));
//BP Deviation documented
sysTableLookup.parmTmpBuffer(tmpTableFieldLookup);
sysTableLookup.performFormLookup();
}
The above code helps in displaying strings as lookup.

Answer 3

I'm also guessing there's no way to perform a lookup without a table. I say that because a lookup is simply a form with one or more datasources that is displayed in a different way.
I've also blogged about this, so you can get some info on how to perform a lookup, even with a temporary table, here:
http://devexpp.blogspot.com.br/2012/02/dynamics-ax-custom-lookup.html

Answer 4

Example from global::PickEnumValue:
static int pickEnumValue(EnumId _enumId, boolean _omitZero = false)
{
Object formRun;
container names;
container values;
int i,value = -1,valueIndex;
str name;
#ResAppl
DictEnum dictEnum = new DictEnum(_enumId);
;
if (!dictEnum)
return -1;
for (i=1;i<=dictEnum.values();i++)
{
value = dictEnum.index2Value(i);
if (!(_omitZero && (value == 0)))
{
names += dictEnum.index2Label(i);
values += value;
}
}
formRun = classfactory.createPicklist();
formRun.init();
formRun.choices(names, #ImageClass);
formRun.caption(dictEnum.label());
formRun.run();
formRun.wait();
name = formRun.choice();
value = formRun.choiceInt();
if (value>=0) // the picklist form returns -1 if a choice has not been made
{
valueIndex = -1;
for (i=1;i<=conLen(names);i++)
{
if (name == conPeek(names,i))
{
valueIndex = i;
break;
}
}
if (valueIndex>=0)
return conPeek(values,valueIndex);
}
return value;
}

Answer 5

It isn't the most graceful solution, but this does work, and it doesn't override or modify any native AX 2012 objects:
Copy the sysLookup form from AX2009 (rename it) and import it into AX 2012.
We'll call mine myLookupFormCopy.
I did a find/replace of "sysLookup" in the XPO file to rename it.
Create this class method:
public static client void lookupList(FormStringControl _formStringControl, List _valueList, str _columnLabel = '')
{
Args args;
FormRun formRun;
;
if (_formStringControl && _valueList && _valueList.typeId() == Types::String)
{
args = new Args(formstr(myLookupFormCopy));
args.parmObject(_valueList);
args.parm(_columnLabel);
formRun = classFactory.formRunClass(args);
_formStringControl.performFormLookup(formRun);
}
}
In the lookup method for your string control, use:
public void lookup()
{
List valueList = new List(Types::String);
;
...build your valueList here...
MyClass::lookupList(this, valueList, "List Title");
super();
}