> I'm still getting my head around the whole > 'public get/set variableName():blah' construct It's the reason that Flash and Flex APIs can be property-centric instead of method-centric. You can make lots of things happen simply by assigning new values to properties, because the setter method can have all kinds of interesting side effects. In Flex, the typical thing that happens is that the setter of a property (at least on visual components) calls various invalidation methods which cause the component to undergo relayout via the LayoutManager. Setters also generally dispatch various (undocumented) event to cause binding expressions to re-evaluate. - Gordon
________________________________ From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Peter Connolly Sent: Friday, August 24, 2007 3:46 PM To: flexcoders@yahoogroups.com Subject: Re: [flexcoders] Re: Overriding getters/setters getting compile error That makes sense. I'm still getting my head around the whole 'public get/set variableName():blah' construct, which doesn't exist in Java-land. pc On 8/24/07, Doug Lowder < [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > wrote: Please pardon my jumping in here, but I think it may just be more a case of duplicate names than scoping issues. The compiler identifies a getter function by its name, and the same with a variable. If you have both a getter and a variable named "widget", how would the compiler be able to tell them apart and know when you wanted just the variable as opposed to executing the getter function? Prefixing the "_" to the variable name is typical convention for mking the variable and getter/setter distinguishable from each other (e.g., "_widget" is the variable, "widget" is the getter/setter). Doug --- In flexcoders@yahoogroups.com <mailto:flexcoders%40yahoogroups.com> , "Peter Connolly" <[EMAIL PROTECTED]> wrote: > > Thanks Tony, although I must admit that I don't understand why this now > works. Why can't the variable and the getter/setter methods be in the same > scope? I don't remember reading anything about that kind of restriction... > > > On 8/23/07, Tony Alves <[EMAIL PROTECTED]> wrote: > > > > Your private variable and getter/setter are in the same scope. > > try: > > private var _widget:String; > > override public function get widget():String { > > return _widget; > > } > > override public function set widget(value:String):void { > > _widget = value; > > } > > Peter Connolly wrote: > > > > > > I get the following compiler errors: > > > > > > 1021: Duplicate function definition Base.as < http://Base.as <http://Base.as> > > > > line 11 > > > 1021: Duplicate function definition Base.as < http://Base.as <http://Base.as> > > > > line 14 > > > 1023: Incompatible override Base.as < http://Base.as <http://Base.as> > > > > line 11 > > > 1023: Incompatible override Base.as < http://Base.as <http://Base.as> > > > > line 14 > > > > > > If my parent class is: > > > > > > package > > > { > > > public class Base > > > { > > > private var widget:String; > > > > > > public function Base(value:String = "base-level widget") { > > > trace("'Base.as <http://Base.as <http://Base.as> >' - value of widget is: " > > > + this.widget); > > > } > > > > > > public function get widget():String { > > > return this.widget; > > > } > > > public function set widget(value:String):void { > > > this.widget = value; > > > } > > > } > > > } > > > > > > and the class with overriden getters/setters is: > > > > > > package > > > { > > > public class OverridenClass extends Base > > > { > > > public function OverridenClass(value:String = "overriden > > > widget value") { > > > super(value); > > > trace("value of widget is: " + widget); > > > } > > > > > > override public function get widget():String { > > > return widget; > > > } > > > override public function set widget(value:String):void { > > > this.widget = value; > > > } > > > > > > } > > > } > > > > > > The lines that are highlighted are the ones marked as errors by the > > > compiler under Hotfix3, Flex 2.0.1. > > > > > > I thought I was following the examples shown on p. 135 "Overriding > > > getters and setters" in the Programming ActionScript 3.0 manual. > > > > > > Can anyone point out to me why this is not working? > > > > > > __._,_ > > > > > > > >
