Re: [flexcoders] Re: Httpservices as3 class
Do I infer correctly that your HTTPService is working properly but that
you're having problems when binding the results to the GUI?
You can see the data that has been returned?
Are you using ResultEvent or AsyncResponder? If you're using
AsyncResponder with the public release of the beta, note below:
// these handlers stubs are necessary because of Adobe bug
http://bugs.adobe.com/jira/browse/SDK-22883
protected function onFaultEventHandler(e:FaultEvent): void{};
protected function onResultEventHandler(e:ResultEvent):void {};
overrideprotected function onResult(e:ResultEvent ,
token:Object=null):void {
var ans: String = decodeURI(e.result.toString());//
UTF-8 to string
// I am using JSON, not XML, and here the results are
converted to an ArrayCollection
// and then an event is dispatched which the GUI is
listening for, passing the ArrayCollection
}
}
Regards
Tim Romano
On 3/9/2010 10:00 AM, valdhor wrote:
Does anybody have a httpservice class, implemented in as3, for flahs
builder
4?
I am trying to create an application in as3, connecting and returnig
dynamic
data from php...
So I need to have my hhtpservice created at runtime and calling my data
functions dynamically...
snip
I tried to created one, but I have some problems when loading and
setting
data to my dataproviders...
Re: [flexcoders] Need to filter UTF-8 characters from string
On 3/9/2010 2:29 AM, flex flex wrote:
I have a string of which contains lots of special characters from
different standerds. I want to filter the string and want only those
characters which are supported by UTF-8.
Does anyone have any idea for this?
I have a sample string as-
!#x22;#$%#38;#x27;()*+,-./0123456789:;#x3C;=#x3E;@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~#x22;#x27;#38;#x3C;#x3E;¡¢£¤¥¦§¨©ª#x22;®¯°±²³´µ·¸¹º#x22;¼½¾¿×÷ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþÿOEoeS(s(Yf^~--#x27;#x27;,#x22;#x22;#x22;+++o...0/00EUR^(TM)
http://en.wikipedia.org/wiki/UTF-8
Regards
Tim Romano
[flexcoders] My Flex app seems to have stopped working in Firefox after installing latest Windows security patches
This morning I installed several Windows XP and IE security patches (list below). The Flex app I've been developing, which uses HTTPService to get JSON-formatted results from a webservice, seems to have stopped working in Firefox 3.6 (yet it still works in IE and in Opera). 2010-03-0408:39:42:234 900 70Agent * Updates to install = 4 2010-03-0408:39:42:625 900 70Agent * Title = Security Update for Windows XP (KB972270) 2010-03-0408:39:42:625 900 70Agent * Title = Update for Microsoft Silverlight (KB979202) 2010-03-0408:39:42:625 900 70Agent * Title = Update for Windows XP (KB955759) 2010-03-0408:39:42:625 900 70Agent * Title = Cumulative Security Update for Internet Explorer 8 for Windows XP (KB978207) Anyone else having similar problems? Thanks Tim Romano
Re: [flexcoders] Strategies for switching between testing and deployment addresses
I'm too new at Flex to do anything fancy like reading files from the O/S
file system, so I use the Project compile option.
-locale en_US -define=CONFIG::debug,true
Then I have me some constants:
public static const DEBUGMODE:Boolean = CONFIG::debug;
public static const DEBUG_BASEURL:String = http://localhost/foo/;
public static const RELEASE_BASEURL:String =
http://www.somedomain.com/foo;;
And then in my wrapper for the HTTPService:
if ( SearchConstants.DEBUGMODE) {
baseURL = SearchConstants.DEBUG_BASEURL ;
}else{
baseURL= SearchConstants.RELEASE_BASEURL ;
}
All you have to do is change the compiler settings to debug, false and
-- voilà -- or wa-la if you like that better. There's still the
forgetting to change the compiler options issue, but it's probably a
good habit to examine the Compiler options before each compile, and this
approach inculcates a good habit.
Take this with a grain of salt; I'm new to Flex; my expertise, if I have
any at all, is not in Flex programming.
Regards
Tim Romano
On 2/21/2010 8:00 PM, David Adams wrote:
I've been writing some small programs that use HTTPService calls to
fetch data from a back-end. During testing, I'm using 127.0.0.1 or an
IP address on my subnet. When I deploy, I update the IP address in
service definitions to the right external address and build the app.
Or at least I mean to. It's all too easy to accidentally change the
addresses for internal testing and then forget to switch them back
before building.
Is there a best practice or simple strategy for putting the IP address
somewhere outside of the source code that it can easily be edited
without a rebuild?
Thanks for any advice.
__
Re: [flexcoders] SQL Question
Hard to know for sure from the way you've put the question, but the IN lists seem malformed to me. Correct: IN (a, b, c) Incorrect: (a, b, c) Regards Tim Romano On 2/20/2010 6:04 PM, Wally Kolcz wrote: I know this is out of the core topic, but I am banging my head on this simple issue..or probably is... I am trying to write a SQL query (in ColdFusion) for my database (MySQL 5) when I am looking for a passed in argument value in the column (which is set as a varchar). I am passing in '0' for the ageGroup and 'kids' for the accountType I have 'kids' My Query is: Select CONCAT(roomDisplay, (National)) as roomDisplay, CONCAT(cfqueryparam value=#arguments.ageGroup#, -, roomDisplay, -, National) as roomID FROM chatrooms WHERE cfqueryparam value=#arguments.accountType# IN (accountType) AND cfqueryparam value=#arguments.ageGroup# cfsqltype=cf_sql_integer / IN (ageGroups) ORDER BY roomDisplay ASC I have a record where 'ageGroups' is '0, 1, 2, 3, 4, 5, 6, 7, 8' and the 'accountType' is 'kids, siblings, parents' I keep getting 0 returns but I know both values exist in at least 1 record What am I doing wrong? No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.435 / Virus Database: 271.1.1/2702 - Release Date: 02/21/10 19:34:00
[flexcoders] best place to make feature requests
Where's the best place to make feature requests for FlashBuilder? Thanks
[flexcoders] ExternalInterface : debugging, DOM, Export Release Build
My browser-deployed Flex app, built in FB4, is using the ExternalInterface. The Flex app gets some search terms from the user, goes out to a webservice for some data, and then pushes some html markup out to a DIV in the HTML document using the ExternalInterface.call() method. I send the content across the bridge as a parameter to javascript function that appends a child to the target DIV. Nice and simple with the EI. However, I have a couple of questions about the logistics of developing this sort of application in FlashBuilder. When Export Release Build is chosen from the Project menu in FB4, it destroys and recreates the HTML deployment wrapper for the SWF. Is there any way for the developer to provide an HTML document template to FB, marked up with comments/metadata tags, such that only the Adobe browser-sniffing code and SWF-embed code gets overwritten but the rest of the HTML document (the user-portion) remains intact? Also, is it possible to set up a project in FB4 that uses the ExternalInterface, where you can step through code in the debugger and also see pushed content being rendered in the HTML document hosting the SWF? In debug mode it seems not possible to work with your actual HTML host document and its javascript functions-- or am I missing something obvious? I am pretty new to FB and that could easily be the case. Finally, will future versions of the ExternalInterface expose the DOM of the hosting document via ActionScript object wrappers? Thanks
Re: [flexcoders] HTTPService token: a bug or by design?
To answer my own dumb question.
var token: AsyncToken;
token = send();
var myResponder : AsyncResponder= new AsyncResponder(onResult, onFault,
token);
token.addResponder(myResponder);
function onResult(e:ResultEvent , token:Object=null):void {}
On 2/8/2010 6:05 PM, Tim Romano wrote:
I've run into one bug in the mx.rpc.http.HTTPService class in FB4 beta
2 -- the AsyncResponder's onResult function fires *twice* unless you
wire up a dummy eventhandler. And so I am wondering if the following is
not also a bug:
var myResponder : AsyncResponder= new AsyncResponder(onResult, onFault);
var token: AsyncToken;
token = send();
token.addResponder(myResponder);
function onResult(e:ResultEvent , token:Object=null):void {}
The token parameter is always null in the onResult function. Isn't that
parameter supposed to contain the token to which the Responder was added?
Thanks
Tim Romano
[flexcoders] HTTPService token: a bug or by design?
I've run into one bug in the mx.rpc.http.HTTPService class in FB4 beta
2 -- the AsyncResponder's onResult function fires *twice* unless you
wire up a dummy eventhandler. And so I am wondering if the following is
not also a bug:
var myResponder : AsyncResponder= new AsyncResponder(onResult, onFault);
var token: AsyncToken;
token = send();
token.addResponder(myResponder);
function onResult(e:ResultEvent , token:Object=null):void {}
The token parameter is always null in the onResult function. Isn't that
parameter supposed to contain the token to which the Responder was added?
Thanks
Tim Romano
Re: [flexcoders] Steve Jobs on Flash .......
If the rumors about Bing are true, then this panning could also have something to do with Silverlight. If I were at MSFT and my role was to ensure that Silverlight succeeded in knocking Flash off (as Word knocked off WordPerfect back in the day, e.g.) then I'd be looking for chinks in Adobe's armor wherever they may be. On 2/1/2010 2:26 PM, Paul Andrews wrote: It's just commercial tactics. You'd never guess he has his own tied-in development system to support. Why wouldn't he knock flash? hworke wrote: http://news.yahoo.com/s/pcworld/20100201/tc_pcworld/stevejobsdissesapplerivalsduringtownhallmeeting http://news.yahoo.com/s/pcworld/20100201/tc_pcworld/stevejobsdissesapplerivalsduringtownhallmeeting Jobs has previously called out Adobe Flash, currently the dominant animation platform on the Web, for being too slow to be useful and Flash Lite, Adobe's versio n of Flash for mobile devices, as not advanced enough for the iPhone. So it's no surprise to hear Jobs called out Flash during Apple's Town Hall, but his language this time sounds a little over the top. Jobs reportedly called Adobe a lazy company, and said that when a Mac crashes it's usually because of Flash. Whether or not that's true, it's clear that Jobs is not a fan of Adobe's multimedia platform. The iPhone is routinely criticized for its inability to render Flash-based Web pages, videos and games, and early criticisms about the iPad also decry the lack of Flash compatibility on Apple's latest device.
[flexcoders] rendering HTML markup in AdvancedDataGrid
I am considering using an AdvancedDataGrid in hierarchical mode but am not sure it can do what my app needs to do, or if it can, whether the approach will be efficient--execute quickly and use up a lot of memory. I haven't worked with the AdvancedDataGrid before. The grid will look like this: [v] Category A [v] Title 1 * passage one blah blah blah * passage two [v] Title 2 [v] Title 3 . . . [v] Title n [v]Category B [v] Title 1 [v] Title 2 [v] Title 3 . . . Title n etc etc When the user clicks on a Title node to expand it, some passages excerpted from the corresponding document would be fetched from the database, already formatted as HTML like this: span class='foo'this is an excerpt span class='abc'100 to 1000/span characters in length/span. A style sheet must control how the css classes in the passage excerpts are rendered. The grid might have as many as 100 rows, and each row could contain a couple of paragraphs of html text. Up to 1K each, but more typically around 100-200 characters. If I create an item-renderer using TextArea, will 100 TextAreas be created if the grid has 100 Title rows even if only 3 titles are expanded by the user? Or are the item renderers created only for the rows that actually get expanded and displayed? Is there another way to render HTML markup in the ADG? Thanks
Re: [SPAM] [flexcoders] rendering HTML markup in AdvancedDataGrid
Thanks for the reply, Tracy, about the ItemRenderers. +1 on the htmlText warning. I've used the htmlText of the TextArea in an AIR app, which I'm converting from local DB to webservice mode now. The html rendering in Flex of the sort of html markup example I gave below is better than bad but is far from rich. Adobe gets a very low passing grade from me on its htmlText + CSS rendering in Flex. I don't need typographic control (kerning, ligatures, etc) but I do want support for basic CSS-- I could never get padding and margins to work. Font-family, bold, italics, font-size do work. Tim On 2/6/2010 2:08 PM, Tracy Spratt wrote: Item Renderers are only created for the visible rows plus a few buffers. Performance is primarily determined by the rendering and item data access. Be aware that htmlText only renders a small subset of html tags. Tracy Spratt, Lariat Services, development services available *From:* flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] *On Behalf Of *Tim Romano *Sent:* Saturday, February 06, 2010 12:36 PM *To:* flexcoders@yahoogroups.com *Subject:* [SPAM] [flexcoders] rendering HTML markup in AdvancedDataGrid I am considering using an AdvancedDataGrid in hierarchical mode but am not sure it can do what my app needs to do, or if it can, whether the approach will be efficient--execute quickly and use up a lot of memory. I haven't worked with the AdvancedDataGrid before. The grid will look like this: [v] Category A [v] Title 1 * passage one blah blah blah * passage two [v] Title 2 [v] Title 3 . . . [v] Title n [v]Category B [v] Title 1 [v] Title 2 [v] Title 3 . . . Title n etc etc When the user clicks on a Title node to expand it, some passages excerpted from the corresponding document would be fetched from the database, already formatted as HTML like this: span class='foo'this is an excerpt span class='abc'100 to 1000/span characters in length/span. A style sheet must control how the css classes in the passage excerpts are rendered. The grid might have as many as 100 rows, and each row could contain a couple of paragraphs of html text. Up to 1K each, but more typically around 100-200 characters. If I create an item-renderer using TextArea, will 100 TextAreas be created if the grid has 100 Title rows even if only 3 titles are expanded by the user? Or are the item renderers created only for the rows that actually get expanded and displayed? Is there another way to render HTML markup in the ADG? Thanks No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.435 / Virus Database: 271.1.1/2671 - Release Date: 02/06/10 07:35:00
[flexcoders] my HTTPService POSTs are showing up as GETs in FB4 beta 2: is POST implemented?
I would be grateful if someone could confirm that HTTPService POST actually works in FB4 beta 2.When I set the method = POST, the header shows up as a GET in the Fiddler traffic monitor, and so the parameters I'm trying to send to the remote server never arrive; only the name/value pairs in the query string arrive at the destination URL. Thanks
[flexcoders] Dog woofs, Cat meows; can the same listener listen to either and how do you remove the eventlistener?
The question is at the very bottom. Here's the scenario:
Let's say I have a base class Animal, and subclasses Dog and Cat that
extend Animal.
Animal has a protected Speak() method which Dog and Cat each override:
when aDog instance and aCat Speak(), they each raise an event, a
CreatureSpeakingEvent.
class Dog extends Animal {
override protected class Speak() {
var sound:String = woof;
var eventObj:CreatureSpeakingEvent = new CreatureSpeaking (
CreatureSpeakingEvent, sound, true, false );
this.dispatchEvent(eventObj);
}
}
class Cat extends Animal {
override protected class Speak() {
var sound:String=meow;
var eventObj:CreatureSpeakingEvent = new CreatureSpeakingEvent (
CreatureSpeakingEvent, sound, true, false );
this.dispatchEvent(eventObj);
}
}
In the main class, which can instantiate either or both of these
animals, a listener is attached to the CreatureSpeakingEvent event:
var aDog = new Dog();
var aCat = new Cat();
aDog.addEventListener(CreatureSpeakingEvent, onCreatureSpeaking);
aCat.addEventListener(CreatureSpeakingEvent, onCreatureSpeaking);
The onCreatureSpeaking() function listens:
private function onCreatureSpeaking(e:CreatureSpeakingEvent) {
// is the following cast to the base-class Animal acceptable?
Animal (e.target).removeEventListener(CreatureSpeakingEvent,
onCreatureSpeaking);
}
Thanks for the help!
Tim
Re: [flexcoders] Problem losing values from query results to RESULT.DATA
What happens if you don't put any quotes around the column aliases? Tim On 1/19/2010 4:55 PM, charliecrystle wrote: Weird issue: I have a query that works fine--produces expected results: SELECT COUNT(tagsLU.tagid) as 'tagcount', tag.tagname as 'tagname' FROM TagsLU Inner Join tag on tag.tagid=tagslu.tagid Group By tag.tagname Order By tagcount DESC
Re: [flexcoders] question about inheritance and events and overriding methods
Thanks very much, Aaron, for taking the time to compile the code on your end. Without your help, I'd have been spinning my wheels on this for days It appears to be a compiler/debugger bug in beta 2. I started commenting out code and recompiling and then uncommenting and recompiling and eventually the error icon jumped to a line with no code on it at all. So I closed FB completely and reopened it and the code compiled and I was able to debug it. I got rid of the calls to super() BTW and moved the params parameter out of the constructor to the execute() function. Tim On 1/18/2010 9:10 PM, Aaron Hardy wrote: I just tried it on my machine and it compiled without any problems after I took out the dependencies I didn't have access to. I never got the error you mentioned. Maybe it's referring to something else? Cut everything out of your project (maybe make a new one) except the onResult function you believe may be the cause and see if you still get the error. I suspect you won't. Good luck! Aaron
Re: [flexcoders] question about inheritance and events and overriding methods
I am having trouble with an override, getting Method marked override
must override another method.
No problem at all doing this:
in the BASE CLASS:
protected function foo(): void{}
in the SUBCLASS
override protected function foo(): void{}
But the error given above occurs here:
in the BASE CLASS
protected function onResult(e:ResultEvent, token:Object=null):void {}
in the SUBCLASS
override protected function onResult(e:ResultEvent,
token:Object=null):void {}
I don't see why it's not working. All of the requirements set out here
seem to be satisfied:
http://livedocs.adobe.com/flex/3/html/help.html?content=04_OO_Programming_11.html
I've included the class implementations below. Is the cause of the
error evident?
Thanks again for the help, it's appreciated doubly because I'm stumped
by this.
Tim
=== BASE CLASS ==
package TESTREST
{
import mx.rpc.http.HTTPService;
import mx.rpc.AsyncResponder;
import mx.rpc.AsyncToken;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
import OEREST.events.*;
import OEUTIL.BindableArrayCollection;
import json.*;
import OEUTIL.SearchConstants;
public class MYHTTPSERVICEBASE extends HTTPService
{
private var _params: Object;
private function get Params(): Object {return _params;}
public function MYHTTPSERVICEBASE(destination: String,
params:Object = null)
{
var _params: Object=params;
var baseURL: String;
if ( SearchConstants.DEBUGMODE) {
baseURL = SearchConstants.DEBUG_BASEURL ;
}else{
baseURL= SearchConstants.RELEASE_BASEURL ;
}
super(baseURL, destination);
}
public function execute(): void {
var myResponder : AsyncResponder= new
AsyncResponder(onResult, onFault);
this.resultFormat= HTTPService.RESULT_FORMAT_TEXT;
var token: AsyncToken;
if ( this.Params == null) {
this.method=GET;
token = this.send();
} else {
this.method=POST;
token = this.send(Params);
}
token.addResponder(myResponder);
}
protected function foo(): void {}
protected function onResult(e:ResultEvent,
token:Object=null):void {}
protected function onFault(evt:FaultEvent, token:
Object=null):void {}
}
}
== SUBCLASS
package TESTREST
{
public class TestService extends TESTREST.MYHTTPSERVICEBASE
{
import mx.rpc.events.ResultEvent;
protected const DEBUGMODE:Boolean = CONFIG::debug;
protected const DEBUG_BASEURL:String =
http://localhost/OESharpDeploy/;
protected const RELEASE_BASEURL:String = ;
import TESTREST.events.*;
import json.JParser;
public function TestService()
{
var dest: String =getServiceURL();
var selTitles : Array =new Array(1,2,3,4,5,6,7,8,9,10,11,12);
var ss:String = JParser.encode(selTitles);
var params:Object = {selectedTitles: ss};
super( dest, params);
}
private function getServiceURL(): String {
if (DEBUGMODE) {
return DEBUG_BASEURL + /SSQ.ashx ;
}else{
return RELEASE_BASEURL + /SSQ.ashx ;
}
}
override protected function foo(): void{}
override protected function onResult(e:ResultEvent,
token:Object=null):void {}
}
}
On 1/17/2010 10:49 PM, Aaron Hardy wrote:
I'm not sure I understand your question clearly but if I assume
correctly I think the answer will be yes, there is no need for each
descendant to instantiate its own responder.
Aaron
On Sun, Jan 17, 2010 at 6:37 PM, Tim Romano tim_rom...@yahoo.com
mailto:tim_rom...@yahoo.com wrote:
Thank you, Aaron, for the helpful answers. My intention would be
to have each of the descendants of MYHTTPSERVICEBASE point to a
different destination and raise an event specific to that
destination, and to have a separate listeners for each kind of
event. If I've understood you correctly, there is no need for each
of the descendants to instantiate their own Responder and no
requirement for them to override the base execute() method too.
Tim
/* this method is in the descendant class and overrides the base
method */
private overrides function onResult(e:ResultEvent,
token:Object=null):void {
// raise a specific event
}
/* these two methods are in the base class */
publicfunction execute() : void {
myResponder = new AsyncResponder(onResult, onFault);
this.resultFormat= HTTPService.RESULT_FORMAT_TEXT;
var token: AsyncToken
[flexcoders] not legal to override a function with an optional parameter, e.g. foo(s: String=null) ?
I've been asking general questions about inheritance and am splitting
this question off as a separate one because it's very specific.
It appears that you cannot override a function with optional parameters?
protected function foo(a:String, s:String=null): void {}
Isn't the signature considered the same if you do this?
override protected function foo(a:String, s:String=null): void{}
Thanks
Tim
[flexcoders] question about inheritance and events and overriding methods
Let's say I have a class MYHTTPSERVICEBASE which extends
mx.rpc.http.HTTPService. This base class of mine checks whether it is
being run in debug mode or release, and sets the base URL to localhost
or the remote host. Then I have individual http service classes that
extend MYHTTPSERVICEBASE.
I want my http service layer to dispatch messages that my GUI layer will
be listening for:
publicfunction execute() : void {
myResponder = new AsyncResponder(onResult, onFault);
this.resultFormat= HTTPService.RESULT_FORMAT_TEXT;
var token: AsyncToken = this.send();
token.addResponder(myResponder);
}
privatefunction onResult(e:ResultEvent, token:Object=null):void {
// Got Data? then instantiate and dispatch a bubbling event
object that encapsulates the data
// the GUI layer will be listening for this event
}
Questions:
Can the event object be dispatched from within the MYHTTPSERVICEBASE?
Will the GUI hear it if it's dispatched from the base class?
In a class that extends MYHTTPSERVICEBASE, can I override the onResult()
method that has been registered with the Responder by the base class?
Thanks for the help!
Re: [flexcoders] question about inheritance and events and overriding methods
Thank you, Aaron, for the helpful answers. My intention would be to have
each of the descendants of MYHTTPSERVICEBASE point to a different
destination and raise an event specific to that destination, and to have
a separate listeners for each kind of event. If I've understood you
correctly, there is no need for each of the descendants to instantiate
their own Responder and no requirement for them to override the base
execute() method too.
Tim
/* this method is in the descendant class and overrides the base method */
private overrides function onResult(e:ResultEvent,
token:Object=null):void {
// raise a specific event
}
/* these two methods are in the base class */
publicfunction execute() : void {
myResponder = new AsyncResponder(onResult, onFault);
this.resultFormat= HTTPService.RESULT_FORMAT_TEXT;
var token: AsyncToken = this.send();
token.addResponder(myResponder);
}
privatefunction onResult(e:ResultEvent, token:Object=null):void {
// this method is overridden by descendants
}
On 1/17/2010 3:38 PM, Aaron Hardy wrote:
I'll take a crack at it.
Can the event object be dispatched from within the MYHTTPSERVICEBASE?
Sure. I think there may be a separate underlying question here
though. Are you asking how? Maybe you can clarify?
Will the GUI hear it if it's dispatched from the base class?
First of all, if the service classes you're talking about aren't on a
display list (it's very likely they are NOT) then an event doesn't
bubble in the traditional sense. Nothing will hear the event unless
it specifically has added an event listener to your service object.
So if you want any view component to hear the event being dispatched
by your service object, the view component will need to add an event
listener to your service object. Depending on the framework you're
using, there may be some other mechanism whereby the view can hear
about a command's completion. Something else you can do (though some
architecture developers will cringe) is dispatch the event off the
stage, the system manager, or the base application from your command
and then the view would add an event listener to whichever object that is.
In a class that extends MYHTTPSERVICEBASE, can I override the
onResult() method that has been registered with the Responder by the
base class?
Yes. In the case of your sample code, if you override onResult in
your class that extends MYHTTPSERVICEBASE, it is the overriding
function that is passed into the responder. That is, when you
reference onResult, you're referencing the most extended onResult
function, not just the onResult function in the class from which
onResult is referenced.
I hope that makes sense. It's very likely I misinterpreted your
questions.
Aaron
Re: [flexcoders] HTTPService Responder ResultEvent -- how to know when the JSON data sent via HTTP are complete?
Tracy, Yes. Thanks for the info. Tim On 1/13/2010 12:51 AM, Tracy Spratt wrote: You are using Firefox, I bet. I have sent this behavior and I think it is just a bug in FF. Tracy Spratt, Lariat Services, development services available The status bar says Transferring data from localhost... and that status message never goes away. sn ip
[flexcoders] HTTPService Responder ResultEvent -- how to know when the JSON data sent via HTTP are complete?
I started learning FlashBuilder/Flex by diving in and writing an AIR application against SQLite with asynchronous connections and Responder objects. The responder's resultsHandler is passed a flash.data.SQLResult object that exposes a complete status property. Lovely. Now I am trying to rewrite that AIR application as a browser-deployed Flex app using an HTTPService against a RESTful webservice that returns JSON data. The webservice is working, and the Flex HTTPService is pulling the JSON string down, but there doesn't seem to be anything analogous to the complete property that was available with the asynch data connection in the AIR app. Not so lovely. The result-handler specified in the HTTPService responder has two parameters, the ResultEvent and the AsyncToken. The ResultEvent exposes a statusCode property. The result-handler can be called more than once. The ResultEvent.statusCode = 200 each time the handler is called. How do you know when the remote data are complete? I will keep googling as I'm sure this question must be commonplace, but so far I haven't found the answer. Thanks for the help.
Re: [flexcoders] HTTPService Responder ResultEvent -- how to know when the JSON data sent via HTTP are complete?
Jeff,
Thanks for the reply. I am confused by the behavior of my Flex app. The status
bar says Transferring data from localhost... and that status message never
goes away. But, as you suggested, the data are complete: I pop the raw JSON
string returned by the webservice into a TextArea, and it's all there, a string
literal representing an array of objects:[{...},{...},{...}], and the
string literal decodes into a well-formed ActionScript array.
Is there something my results-handler has to do to clear that status message?
Tim
Maybe I’m missing something here,
but to my understanding when the result event of your HTTP service fires, your
call IS complete. You should have access to the json string that was
pulled back from the service. Is there something else you need that the
json string doesn’t’ supply?
[flexcoders] Channel.Security.Error : guidance please
If I understand this document correctly: http://kb2.adobe.com/cps/142/tn_14213.html the Channel.Security.Error (Security error accessing url) that I get when trying to access a webservice hosted at www.flash-mx.com from my desktop FlashBuilder (beta 2) development environment is probably the result of there not being a crossdomain.xml policy file at the root of www.flash-mx.com that permits access from *. mx:WebService id=webService wsdl=http://www.flash-mx.com/ws/months.cfc?wsdl; mx:operation name=getMonths resultFormat=object result=getMonths_result(event); fault=getMonths_fault(event); / /mx:WebService Do RESTful webservices avoid cross-domain security issues when the SWF client is running on a domain other than the one hosting the webservice? Thanks
[flexcoders] possible to derive rowIndex from DataGrid's rightClick event?
In an AIR app, I'd like to be able to know what row of a DataGrid the user has right-clicked on.* The rightClick event of the DataGrid is a MouseEvent and does not expose rowIndex (unlike the rowClick event which is of type ListEvent). Is there a way to derive the rowIndex in the grid's rightClick eventhandler? Thanks *I'm hoping to make a CheckBoxDataGrid interactive in two ways -- normal check-box multi-selection mode, which is working fine, but also a right-click-on-single-row mode, where the row is not selected but is temporarily the subject of the user's attention -- possibly for a context-menu.
[flexcoders] padding P element with CSS in htmlText of TextArea
While I've been able to apply some CSS styles (e.g. fontFamily, fontSize, fontWeight, fontStyle, letterSpacing) to the content of p elements and to indidivual class selectors in the htmlText of a TextArea in an AIR application (FB4 beta2), attempts to set other styles, such as padding and margin, have not worked. Are padding and margin not implemented? If not, will they be? CSS + HTML are a powerful duo. I hope Adobe has plans to exploit this capability fully for the TextArea in AIR applications. For many text-presentation purposes CSS support would be entirely adequate, and typographic control would offer far more precision and granularity than is actually needed while introducing unnecessary complexity. Not that typography isn't a very slick feature, but please don't let CSS+HTML fall by the wayside. Regards Tim
Re: [flexcoders] Flex 3: AIR Local Database
The answer to your question about large scale is yes, AIR + SQLite can handle large datasets but with some caveats. I have a SQLite database that is several hundred megabytes. The main tables contain 4 million rows, 275000 rows, and 3500 rows. Queries that join these tables, when the query makes use of indexes, execute in under 100 milliseconds. Snappy. However, some things in the AIR implementation of SQLite are causing index optimizations with the LIKE() operator not to work, both in regular statements and in prepared statements. I am not sure what these things are because the differences between the AIR implementation of SQLite and SQLite proper haven't been documented. They could be things like overloading certain core SQLite functions, or compiling statements/prepared statements with one of the functions that cause the optimizer not to use an index. As a result of these mysterious things, if you run a query like SELECT * from MEMBERSHIP where MEMBER_LASTNAME LIKE 'Johns%' the query will do a full table scan. Do a more complex column value starts-with query that involves joins, and the table scan can translate to very poor performance. For example, when I execute my query at the SQLITE3.EXE command-line, where the index IS used, the query executes in under 100ms but the identical query takes 45-50 seconds in AIR. Also, to keep the front-end responsive when working with large datasets, you will have to use asynchronous data connections not synchronous connections. The coding is somewhat more complicated but also I found the AIR debugger to be less than robust when working with asynchronous connections and data events. However, everything worked OK with Responders, so I'd recommend the use of responder objects over the event-dispatch architecture. I have no experience to offer you with concurrency issues and SQLite. My AIR + local-db application is single-user. Regards TR jwc_wensan wrote: In all the articles I have read and some examples, it only talks about using SQLite as the database on the users' PC/Mac. Is that the only database that can be used locally? Can that database handle a large-scale commercial AIR app with tens of thousands of records? Also, since the AIR app is installed on the users PC/Mac, is there any reason to use mx:Modules? If the user needs/requires that data remain local, is AIR the best solution? Does Flex 4 solve any issues? Thoughts, options, suggestions? Thanks in advance, Jack
[flexcoders] where to get official answer to question about AIR's SQLite implementation and LoadableExtensions mechanism support?
A simple function I need does not exist in the SQLite engine core but the SQLite gurus are telling me to write my own function in C and load it at runtime as a loadable extension. (I have good reasons, BTW, for not wanting the function to execute in the client--it really belongs in the back-end.) http://www.sqlite.org/cvstrac/wiki?p=LoadableExtensions The LoadableExtensions mechanism is disabled by default, and Adobe in its implementation of SQLite may not have enabled the LoadableExtensions mechanism; or if it is enabled, a developer does not know whether it is officially enabled or an undocumented use-at-your-own-risk feature. Where would one get an official answer to the LoadableExtension supported/not-supported question? I've tried the AIR forum at Adobe but my question was not answered there. Thanks
[flexcoders] basic code behind question
It seems a class whose constructor takes arguments cannot be used as the
code-behind class. Is that so? When I try to use this class in the root tag of
my mxml component, there's an error: no default constructor in the base class
TestArgs.
Thanks
package
{
import mx.containers.TitleWindow;
import mx.controls.LinkButton;
public class TestArgs extends TitleWindow
{
public var aLinkButton:LinkButton;
private var _arg1: String;
//public function TestArgs(){}
public function TestArgs(arg1:String)
{
super();
_arg1 = arg1;
}
}
}
[flexcoders] launching popup TitleWindow from a reused mxml component
I posted a question the other day about how to prevent a popup from being dragged outside the bounds of the application window. Since I'm fairly new at Flex, some obvious things are not immediately obvious to me. I think my popup window can be dragged outside the main application window because this in my method call below: PopUpManager.addPopUp(popwin, this, true); actually refers to an isntance of my (reusable) mxml component which is launching the popup, not to the main application window. If the parent DisplayObject referred to by this is not the main application window, is the default behavior that the popup can be dragged outside the main application window? Thanks
[flexcoders] PopupWindow dragging and enforcing main app window bounds
First, thanks to Tracy for answering my question about the columns array of the
DataGrid.
My question relates to dragging popup-windows.
It's possible to drag a popup window outside the main application
window's bounds, and if the user happens to release the
mouse button at the wrong moment, the popup window can no longer be
grabbed.
My popup is defined in ActionScript like this:
public class MyPopupWindow extends TitleWindow { ... }
and is instantiated like this:
var popwin = new MyPopupWindow();
var isModal:Boolean=true;
PopUpManager.addPopUp(popwin, this, isModal);
How would I get a reference to the main application window's bounds?
MyPopupWindow instances could be popped up from deep inside nested containers.
Do I keep getting parents of parents until there are no more parents to get?
If I pass this rectangle to the MyPopupWindow constructor, can MyPopupWindow
use those values to prevent itself from being dropped outside those confines,
in the
stopDragging() method that it inherits from Panel, and relocate itself? What
properties contain its its current location relative to the main window's
bounds?
Or do I need to implement this in the class instance that invokes the
PopUpManager.addPopUp method?
Thanks
