1. Flash Upload
I found a really nice und usefull class this morning. you can capture a bitmap image from a movieclip or from webcam and send it t othe server. it is possible to add other parameters. the class creates a request like the FileReference class would do. on server side it looks the same.

ow-to-take-a-snapshot-of-a-flash-movie-and-automatically-upload-the-jpg-to-a-server-in-three-easy-steps

2. save image in rails
i’m totally new to RubyOnRails but my first impression is really great. you can do everything in few lines of code. for upload und processing of images i found the paperclip gem and this two great tutorials:

http://jimneath.org/2008/05/15/swfupload-paperclip-and-ruby-on-rails.html

http://jetpackweb.com/blog/2009/10/21/rails-2-3-4-and-swfupload-rack-middleware-for-flash-uploads-that-degrade-gracefully/

3. deal with the session problem

rails uses a cookie based session and if you upload files with flash this cookie is not send. the solution for this problem is this gem:
flash_cookie_session.

for more information you can read here:
rails 3 or
rails 2.3

all together works like a charm.

For using another theme you have to add a additional compiler argument to your project.

The old Flex3 Halo Theme:

-theme=D:\compiler\flex_sdk_4.5.0.17689\frameworks\themes\Halo\halo.swc

A new Cobalt theme in the samples folder of the sdk

-theme=D:\compiler\flex_sdk_4.5.0.17689\samples\themes\cobalt\cobalt.swc

Maybe you will get some css warnings and the project won’t compile, in this case turn of these warnings:

-show-invalid-css-property-warnings=false
-show-unused-type-selector-warnings=false

For using another CSS-styled theme copy the css file to your project und add this in your main-mxml:

<fx :Style source="spark_cobalt.css" />

A full list of all sample themes with images you can see here:
http://devgirl.org/2010/01/06/flex-4-sample-themes/

All this themes looks very nice – yeah, if there would be no big BUT! I really like the Cobalt-theme. But if you use the theme all scollbars are fucked up, they will not scroll down to the bottom. The problem occurs at all sample themes. I think without a scroller all these themes are completely useless. Again Flex4 sucks, arrgghhhh. PLEASE Adobe, please fix the problem. I’m not a designer and have not the time to create my own theme and i think i’m not the only one.

[Fault] exception, information=ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller.
bzw.
[Fault] exception, information=ArgumentError: Error #2025: Das angegebene DisplayObject muss ein untergeordnetes Element des Aufrufers sein.

the error is totally nonsense because both elements are childs of the canvas. here is a little bit code to show the problem:

trace( this.getChildIndex( _currentDisplay ) ); // output: 0
trace( this.getChildIndex( _lastDisplay ) ); // output: 1
 
//-- doesn't work. throws exeption
//this.swapChildren( _currentDisplay, _lastDisplay );
 
//-- solution: 
this.removeChild( _currentDisplay );
this.addChild( _currentDisplay );

i got only 2 displayobjects in my canvas. if you got more than 2 you have to rewrite swapChildren by yourself. remove all childs and add it in the new order.

p.s.: everytime i use flex i’m feeling uncomfortable again because of some shit that doesn’t work like expected. i like flex but it seems to me that pure AS3 feels much more stable and reliable. if a have the choice i always prefer AS3.

http://www.adrianparr.com/?p=83

Loaded movies also, in most cases, inherit the parent movie’s frame rate. For example, a SWF file whose frame rate is 12 fps, when loaded into a movie whose frame rate is 24 fps, will play back at 24 fps. The only exception is if the movie being loaded contains a sound on the timeline whose sync is set to “stream”. Only then will the main movie then inherit the frame rate of the loaded movie as to assure the correct playback of that sound.

TextEvent.LINK
Textevent werden nur gefeuert, wenn das Textfeld selectable ist.
Quelle

FlashDevelop Programming AS3 Flex