> Any ideas anyone?
About what? My previous reply explained that an <mx:Application> in MXML autogenerates CSS selector setup code that you don't get when you simply subclass Application in AS3. That's why this works and your previous code didn't. Turn on -keep-autogenerated-actionscript to see this code. - Gordon ________________________________ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Greg McCreath Sent: Thursday, November 16, 2006 8:06 PM To: [email protected] Subject: RE: [flexcoders] Newbie: Why can't I add a button! Thanks. It works fine as a MXML app. Here it is. Any ideas anyone? .... <?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"; layout="vertical" creationComplete="startMe()"> <mx:Script> <![CDATA[ import mx.core.*; import mx.events.*; import mx.skins.halo.*; import mx.styles.*; import mx.controls.*; import flash.display.*; [Embed(source="connected_multiple_big.jpg")] private var ImageClass:Class; public function startMe():void { var img:Image = new Image(); img.setStyle("verticalAlign","top"); img.source = ImageClass; addChild(img); var button:Button = new Button(); button.label = "label"; addChild(button); } ]]> </mx:Script> </mx:Application> Greg McCreath Chief Technical Officer TAFMO Limited ABN: 94 109 766 592 Level 8, 342 Flinders Street Melbourne Victoria, 3000 Australia http://www.tafmo.com Ph <http://www.tafmo.comPh> : +61 (0) 3 9018 6824 Fax : +61 (0) 3 9018 6899 Mobile : +61 (0) 401 988 957 ________________________________ From: Matt Chotin [mailto:[EMAIL PROTECTED] Sent: Friday, 17 November 2006 2:35 PM To: [email protected] Subject: RE: [flexcoders] Newbie: Why can't I add a button! Looks like the style code may not be loading correctly. What happens if you use an MXML file for your application instead of AS? Matt ________________________________ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of bookymcnuggett Sent: Thursday, November 16, 2006 5:49 PM To: [email protected] Subject: [flexcoders] Newbie: Why can't I add a button! Hi All, This is my first posting to this forum. I have taken my first newbie steps to creating a stand-alone AS3 Application and have come across something I cannot understand. I have an Application, and add an Image to it and it is fine. I add a Button to it and it blows up with the AS3 equivalent of a null pointer exception. The code is below. The error is below that. If I comment out the line that does the "addChild(button)" it correctly adds and displays the Image. What am I doing wrong? What is wrong with how I am adding a button? Both Button and Image descend from UIComponent. package { import mx.core.*; import mx.events.*; import mx.skins.halo.*; import mx.styles.*; import mx.controls.*; import flash.display.*; public class FirstApp extends Application { [Embed(source="connected_multiple_big.jpg")] private var ImageClass:Class; public function FirstApp() { super(); this.layout = "vertical"; this.setStyle("borderSkin",mx.skins.halo.HaloBorder); this.addEventListener(FlexEvent.APPLICATION_COMPLETE, doInit); } private function doInit(e:FlexEvent):void { var img:Image = new Image(); img.setStyle("verticalAlign","top"); img.source = ImageClass; addChild(img); // the troublesome test button. addChild() here causes a null object reference exception var button:Button = new Button(); button.label = "label"; addChild(button); } } } /// **************************** TypeError: Error #1009: Cannot access a property or method of a null object reference. at mx.core::UIComponent/getStyle() at mx.controls::Button/http://www.adobe.com/2006/flex/mx/internal::viewS <http://www.adobe.com/2006/flex/mx/internal::viewS> kinForPhase() at mx.controls::Button/http://www.adobe.com/2006/flex/mx/internal::viewS <http://www.adobe.com/2006/flex/mx/internal::viewS> kin() at mx.controls::Button/mx.controls:Button::commitProperties() at mx.core::UIComponent/validateProperties() at mx.managers::LayoutManager/::validateProperties() at mx.managers::LayoutManager/::doPhasedInstantiation() at Function/http://adobe.com/AS3/2006/builtin::apply <http://adobe.com/AS3/2006/builtin::apply> () at mx.core::UIComponent/::callLaterDispatcher2() at mx.core::UIComponent/::callLaterDispatcher() at flash.events::EventDispatcher/flash.events:EventDispatcher::dispatchE ventFunction() at flash.events::EventDispatcher/dispatchEvent() at mx.managers::SystemManager/::preloader_preloaderDoneHandler() at flash.events::EventDispatcher/flash.events:EventDispatcher::dispatchE ventFunction() at flash.events::EventDispatcher/dispatchEvent() at mx.preloaders::Preloader/::displayClassCompleteHandler() at flash.events::EventDispatcher/flash.events:EventDispatcher::dispatchE ventFunction() at flash.events::EventDispatcher/dispatchEvent() at mx.preloaders::DownloadProgressBar/::timerHandler() at mx.preloaders::DownloadProgressBar/::initCompleteHandler() at flash.events::EventDispatcher/flash.events:EventDispatcher::dispatchE ventFunction() at flash.events::EventDispatcher/dispatchEvent() at mx.preloaders::Preloader/::dispatchAppEndEvent() at mx.preloaders::Preloader/::appCreationCompleteHandler() at flash.events::EventDispatcher/flash.events:EventDispatcher::dispatchE ventFunction() at flash.events::EventDispatcher/dispatchEvent() at mx.core::UIComponent/set initialized() at mx.managers::LayoutManager/::doPhasedInstantiation() at Function/http://adobe.com/AS3/2006/builtin::apply <http://adobe.com/AS3/2006/builtin::apply> () at mx.core::UIComponent/::callLaterDispatcher2() at mx.core::UIComponent/::callLaterDispatcher() ________________________________ This email and any files transmitted with it may be confidential and are intended solely for the use of the individual or entity to whom they are addressed. This email may contain personal information of individuals, and be subject to Commonwealth and/or State privacy laws in Australia. This email is also subject to copyright. If you are not the intended recipient, you must not read, print, store, copy, forward or use this email for any reason, in accordance with privacy and copyright laws. If you have received this email in error, please notify the sender by return email, and delete this email from your inbox.
