I've never tried that userCapture=true approach. I was trying to create a full screen app w/ AIR and tried a very similar approach to what you describe to prevent users from escaping out of the app.
The keyboard events would never get caught until something got focus, making it very easy for the user to escape out of the application. Obviously the bar code use case is very different, and you probably won't run into the problem I ran into. Josh VanderBerg wrote: > > > If you call addEventListener with useCapture=true, the listener will > trap events that don't usually bubble. I've verified that it works > even when the focus is on a tab bar. > > The one issue is that after the application starts *nothing* has focus > - but once you click on anything, even a component that doesn't > normally respond to keyboard events, the centralized listener will > start getting key events. > > __ > Josh Vanderberg -- http://vanderblog.typepad.com > <http://vanderblog.typepad.com> > > --- In [email protected] <mailto:flexcoders%40yahoogroups.com>, > Jeffry Houser <[EMAIL PROTECTED]> wrote: > > > > > > Conceptually this sounds good. However, I would expect this method > > would be non-intuitive to users. > > > > Containers will not broadcast keyboard events on their own, so the > > user must have have given focus to a component that will broadcast the > > keyboard events. I believe there are a lot of situations, such as > > changing the selectedIndex of a ViewStack or tabbing through a > > TabNavigator where nothing will be given focus and the bar code scan > > would be ignored. > > > > > > > > Josh VanderBerg wrote: > > > > > > > > > Define a keyDown event handler at the application level. Because of > > > the Flex 2.0 event model, all keydown events, from all controls, > > > should bubble up to the Application. Here is a little application I > > > made to test this. The bottom text area will show all keys typed, no > > > matter the control that has the focus when the key was pressed. > > > > > > <?xml version="1.0" encoding="utf-8"?> > > > <mx:Application keyDown="keyCapture(event)" > > > xmlns:mx="http://www.adobe.com/2006/mxml > <http://www.adobe.com/2006/mxml> > > > <http://www.adobe.com/2006/mxml <http://www.adobe.com/2006/mxml>>" > layout="vertical"> > > > > > > <mx:Script> > > > <![CDATA[ > > > private function keyCapture(event: KeyboardEvent) : void { > > > allKeys.text += String.fromCharCode(event.charCode); > > > } > > > ]]> > > > </mx:Script> > > > > > > <mx:Label text="Text1" /> > > > <mx:TextArea id="textArea" height="200" width="200" /> > > > <mx:Label text="Text2" /> > > > <mx:TextInput id="textInput" /> > > > <mx:Label text="Button:" /> > > > <mx:Button label="Set Focus here" /> > > > > > > <mx:Label text="Key Capture" /> > > > <mx:TextArea selectable="false" id="allKeys" width="400" > height="400" /> > > > > > > </mx:Application> > > > > > > __ > > > Josh Vanderberg -- http://vanderblog.typepad.com > <http://vanderblog.typepad.com> > > > <http://vanderblog.typepad.com <http://vanderblog.typepad.com>> > > > > > > --- In [email protected] <mailto:flexcoders%40yahoogroups.com> > <mailto:flexcoders%40yahoogroups.com>, > > > "Chad Gray" <cgray@> wrote: > > > > > > > > Hello, > > > > > > > > I am just doing research and need some input. > > > > > > > > We would like to make an Air/Flex app that when you scan in a > > > barcode you get product details from a database that CF is serving > out. > > > > > > > > The barcode scanner works like a key board and at the end of a scan > > > I can have it send a carriage return. I don't want the user to have > > > to put focus on a text input field then scan the barcode to get a > > > result. I want them so that any keyboard entry from the scanner will > > > always pull up product details upon the carriage return. > > > > > > > > It does not matter what section of the Appliction they are in. If > > > text entry is present from the barcode scanner then I want to return > > > product details from the database. > > > > > > > > Has anyone built an app that works with a barcode reader in > this way? > > > > > > > > Any quick code suggestions on capturing the text input from the > > > barcode reader? > > > > > > > > Thanks! > > > > > > > > > > > > > > -- > > Jeffry Houser, Technical Entrepreneur, Software Developer, Author, > > Recording Engineer > > AIM: Reboog711 | Phone: 1-203-379-0773 > > -- > > My Company: <http://www.dot-com-it.com <http://www.dot-com-it.com>> > > My Podcast: <http://www.theflexshow.com <http://www.theflexshow.com>> > > My Blog: <http://www.jeffryhouser.com <http://www.jeffryhouser.com>> > > > > -- Jeffry Houser, Technical Entrepreneur, Software Developer, Author, Recording Engineer AIM: Reboog711 | Phone: 1-203-379-0773 -- My Company: <http://www.dot-com-it.com> My Podcast: <http://www.theflexshow.com> My Blog: <http://www.jeffryhouser.com>
