Van De Velde:
I tried you example to get the singleton pattern down of creating some
global static variables. Of course
I created my package and class for my own set-up and I'm getting compile
errors.
Thanks for your help, being a relative newcomer, I appreciate your time
and patience,
Patrick
com.yourProject.config.AppSettings.getInstance().getWhatever();
(of course I renamed this to package, etc...)
Severity Description Resource In Folder Location Creation
Time Id
2 1120: Access of undefined property com. p1.mxml polls line
57 November 18, 2006 10:12:59 PM 4099
var myAppSettings:AppSettings =
com.yourProject.config.AppSettings.getInstance();
myAppSettings.getWhatever();
Severity Description Resource In Folder Location Creation
Time Id
2 1046: Type was not found or was not a compile-time constant:
AppSettings. p1.mxml polls line 56 November 18, 2006
10:14:26 PM 4102
Van De Velde Hans wrote:
>
> A good practice to keep global variables is by creating a class with
> *public static variables*
> and *access those properties *directly *via the class*, for example
> via com.yourProject.Globals.globalParam1,
>
> or if you want something more advanced, create a singleton class :
> like for example :
>
> package com.yourProject.config
> {
> public class AppSettings
> {
> // self-reference
> private static var appSettings:AppSettings;
>
> public var _whateverVariable:String;
>
> // please note the private constructor
> private function AppSettings(){
> }
>
> public static function getInstance():AppSettings
> {
> if(!appSettings){
> appSettings = new AppSettings();
> }
>
> return appSettings;
> }
>
> public function getWhatever():String
> {
> return "whatever";
> }
>
> // implicit getter
> public function get whatever():String
> {
> return _whateverVariable;
> }
>
> // implicit setter
> public function set whatever(_whateverVariable:String):void
> {
> this._whateverVariable = _whateverVariable;
> }
> }
> }
>
> ////////////////////////////
>
> then, use it like this:
>
> com.yourProject.config.AppSettings.getInstance().getWhatever();
>
> or directly access a property:
>
> com.yourProject.config.AppSettings.getInstance().whatever
>
> to simplify the reading of your code, you can also store the returned
> instance in a local variablen like this:
>
> var myAppSettings:AppSettings =
> com.yourProject.config.AppSettings.getInstance();
> myAppSettings.getWhatever();
>
>
>
>
>
> -----Original Message-----
> *From:* [email protected]
> [mailto:[EMAIL PROTECTED] *On Behalf Of *Gordon Smith
> *Sent:* zaterdag 11 november 2006 6:29
> *To:* [email protected]
> *Subject:* RE: [flexcoders] OK, seriously. Why can't I make a
> global var?
>
> <pedantry>This is not technically a global variable. It is simply
> an instance var of the Application object.</pedantry>.
>
> - Gordon
>
> ------------------------------------------------------------------------
>
> *From:* [email protected]
> [mailto:[EMAIL PROTECTED] *On Behalf Of *Karl Johnson
> *Sent:* Friday, November 10, 2006 12:57 PM
> *To:* [email protected]
> *Subject:* RE: [flexcoders] OK, seriously. Why can't I make a
> global var?
>
> You can use mx.core.Application.application.myVar = "hooray!"; if
> you really want to access a global variable like that.
>
> |<
>
> Karl Johnson
>
> Cynergy Systems
>
> ------------------------------------------------------------------------
>
> *From:* [email protected]
> [mailto:[EMAIL PROTECTED] *On Behalf Of *poolpcs
> *Sent:* Friday, November 10, 2006 1:13 PM
> *To:* [email protected]
> *Subject:* [flexcoders] OK, seriously. Why can't I make a global var?
>
> After years (and years and years) of programming Flash, I'm used
> to being able to simply say:
>
> _root.myVar = "hooray!"
>
> and being able to see that variable anywhere.
>
> Why in God's green earth can't I do the same in Flex? I have a
> custom login component which
> is currently a child of the base app, sitting in a view state. All
> I want to do is grab one of the
> returned values that the login gets (emailaddress) and let other
> sections of my program see
> that.
>
> I cannot for the life of me figure this out. I see stuff about
> making static members of classes,
> referencing "parentApplication" etc.
>
> I am in no way a newbie to interactive development, and this is
> just insane. Within my first
> two days of using Flex I figured out how to create a complete
> login/registration system that
> talks to a DB, and figured out how to use the socket class to
> directly talk to my mail server
> and format a proper SMTP message, but I can't do this.
>
> Clear guidance would be appreciated before i pitch my G5 out the
> window.
>
>
