I'm trying to make what should be a fairly simple value transformer. I need to
bind the Enabled state of a control (NSButton in this case, but it could be any
control) to the .isEmpty state of a string. I would think this a common enough
task that an existing value transformer would be supplied, but I guess not.
Unfortunately, the documentation only gives a sample in ObjC, but not Swift.
I have the following:
class MyWindowController : NSWindowController
{
dynamic var message: String
override var windowNibName: String
{
return "MyWindowController"
}
...
}
there's an NSTextField in the window, and it's value is bound to the "message"
variable with bindings; simple enough. There's also a button whose enabled
status I want controlled based on if the value of "message" is the empty
string, so I make:
class IsNotEmptyTransformer : NSValueTransformer
{
}
but the example in the documentation is in ObjC, not Swift, and refers to id,
not to "Bool"s or "String"s. Hints, anyone?
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