I wanna use Alert dialog box instead of skinnable container in my mobile application. I imported Alert class like:
import mx.controls.Alert;
and then I wrote the code below in my button click handler:
Alert.show("example","Error!",Alert.OK);
but when I wrote this code I got lots of errors whose codes are 1120 and 1172, e.g.,
"Access of undefined property ButtonSkin".
If I do not write this code, there is no problem. My application works fully.
Any idea about this error?
Thanks.
Alert is not available in a mobile project; how did you import it w/o a compiler error? [I suspect it was one of the many errors you said you got]
You'll probably want to look into using the PopUpManager to position a SkinnablePopUpContainer.
http://www.adobe.com/devnet/flex/articles/flex-mobile-development-tips-tricks-pt4.html
This would be an easier solution, It has skinned Alerts and normal Alerts which can be used in a mobile project.
Related
When I drag an image in react that has draggable set to true, I get not-allowed / no-drop cursor. I can't figure out how to target it with CSS to overwrite. The way I handle the drag is onDragStart then onDragEnd.
Without some reproducable code i just can try a shot in the dark: You have to call at the beginning of your drag handler e.preventDefault();.
I faced the same issue back when I was working on one of my React projects, so I did some research and tested several methods that I found, but nothing worked for me. You see there is a property named DataTransfer.effectAllowed that specifies the effect that is allowed for drag operation, and there is a limitation to this API as you can read here -
https://developer.mozilla.org/en-US/docs/Web/API/DataTransfer/effectAllowed
Changing the styles or attaching an eventListener won't work, you have to use a different backend for this. Use react-dnd and react-dnd-touch-backend or react-dnd-html5-backend npm packages as a custom backend.
https://www.npmjs.com/package/react-dnd
https://www.npmjs.com/package/react-dnd-touch-backend
https://www.npmjs.com/package/react-dnd-html5-backend
I have a main application calling several ViewStack states, each with popup windows. If I don't open any popup windows, I can move between states fine. If I open a popup window then try to change the state using currentState=... I get the error:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at spark.components::Scroller/focusInHandler()[E:\dev\4.y\frameworks\projects\spark\src\spark\components\Scroller.as:2139]
at flash.display::Stage/set focus()
at mx.core::UIComponent/setFocus() [E:\dev\4.y\frameworks\projects\framework\src\mx\core\UIComponent.as:9905]
...
I see others having the same problem, for example here:
http://forums.adobe.com/thread/1031531
http://forums.adobe.com/message/2767130
http://forums.adobe.com/message/3448443
http://forums.adobe.com/thread/655749?tstart=-1
http://forums.adobe.com/thread/801149
http://flex4examples.wordpress.com/2011/05/05/skinnabletextbase-focusmanager-runtime-error-popup/
http://bugs.adobe.com/jira/browse/SDK-32036?page=com.atlassian.jira.plugin.system.issuetabpanels%3Aall-tabpanel
But I haven't figured out how to implement the recommended solution. It sounds like I should just include:
import mx.managers.PopUpManager; PopUpManager;
inside my main application and it should work, but it doesn't work for me.
My application has each view state in a different file, each defined using <views:View>. Also, all of the popups are separate files defined as <s:TitleWindow>. Each file includes this line:
import mx.managers.PopUpManager;
I wonder if this means each file is using a different popup manager(?), when it's a singleton and only one should be used for the whole app (how to set that up?).
The code I use to call a popup is:
var _popupName:MyTitleWindowFileName = MyTitleWindowFileName(
PopUpManager.createPopUp(this, MyTitleWindowFileName, true));
_popupName.addEventListener(MyAppController.CLOSE_POPUP,onClosePopUp);
PopUpManager.centerPopUp(_popupName); // call popup
Note that when the main application (the one defined as <s:Application>) runs, the ViewStack states have not been loaded yet (since they get loaded when they are used the first time). Not sure if that has any cause/effect here.
I've tried to follow Adobe's example code in the "Passing data to and from a Spark pop-up window" section here:
http://help.adobe.com/en_US/flex/using/WS6c678f7b363d5da52e8f1ca1124a0430dcf-8000.html#WS6c678f7b363d5da52e8f1ca1124a0430dcf-7ffe
Any ideas much appreciated.
Based on your comments, it seems like the error occurs because the focus remains in the popup. I would expect the PopUpManager and FocusManager classes to handle this better.
One thing I can think of is that the FocusManager may be trying to handle this. But since the state changes, the item that originally had focus (in the view stack child, before the pop up was opened) may no longer be there when the view state changes. Just a hunch, w/out seeing your code.
Here's some things you can do to either work around the problem (or better) further debug it to understand what is happening:
Use FocusManager.setFocus() to move the focus back to an object in the view stack child before closing the pop up
Use FocusManager.getFocus() to debug and see where it thinks the focus is at various stages (before opening popup, before/after changing state, and before/after closing pop up).
It appears this is the situation I'm experiencing:
Adobe Air: scroller throws error when changes focus between different applications
It's an Adobe bug. Solution from Adobe is:
This bug is easily fixed by changing Scroller to do a null pointer check on focusManager before using it.
which is what the first link above attempts to do.
Another link: http://forums.adobe.com/message/3812805
When I attempt to add an icon to a button like this:
<s:Button icon="#Embed(source='assets/logo.jpg')"/>
I receive this error:
Multiple markers at this line:
-Button
-Cannot resolve attribute 'icon' for component type spark.components.Button.
The documentation specifies that you can add an icon like that. See Button Reference.
It is interesting because I can add other Common Styles with no trouble. For example this compiles fine:
<s:Button color="#998877" fontSize="16"/>
What am I goofing up here? Sure it is pretty simple.
Edit: There is also an example right here. The example uses version 4.6. I am on version 4.
I ran into this when I first started using the spark components. I was too was using the original Flex 4 version. They originally didn't support an icon property. You'd have to skin it to get it to work. See the following link:
http://www.flexer.info/2009/06/12/how-to-skin-a-button-with-icon-in-flex-4-sdk-spark/
However, rather than using skins to just add a image to the button, I'd also suggest moving up to flex 4.5 and up. Those include enhancements along with the addition of the icon property to the spark button.
In Flash Professional CS4, I get "migration issue" warnings when I use mouse/keyboard input handler names such as onMouseDown, onKeyUp, etc., even though I have added event listeners for them. These names are perfectly legal for functions, but since these were automatically fired in ActionScript 2.0, we are now (albeit sensibly) warned that their use is no longer automatic in AS3.
I understand the purpose of the warnings, but they aren't useful for me. I want to suppress these warnings, but without suppressing any other warnings, which I generally do find useful.
E.g., when I use code like this:
/** #constructor */
public function MyClass() {
addEventListener(MouseEvent.MOUSE_DOWN, onMouseDown);
}
protected function onMouseDown(e:MouseEvent):void {
I get an annoying warning like this:
Warning: 1090: Migration issue: The onMouseDown event handler is not triggered automatically by Flash Player at run time in ActionScript 3.0. You must first register this handler for the event using addEventListener ( 'mouseDown', callback_handler).
There are flex compiler (mxmlc) flags (and a Flash Pro setting) which can suppress actionscript warnings, or all warnings, but I don't want that. That's too general.
Ideally I could suppress a specific error/warning number (Warning #1090).
Edit: I've found more "advanced" compiler flags with mxmlc -help advanced, which look promising. Specifically, the following seem like likely candidates:
warn-deprecated-event-handler-error
warn-deprecated-function-error
warn-deprecated-property-error
How do I get Flash to use these?
Edit 2: I found a flex-info.xml style document in the Flash User Data dir.
[userdatafolder]/Adobe/Flash CS4/en/Configuration/ActionScript 3.0/FlexInfo.xml
However, this file contains a disappointing comment: <!-- Flash does not support most flex-config options. -->, and doesn't seem to respond to my directives even after restarting flash.
This is getting sad.
Edit 3: Found an issue "Erroneous, annoying "Migration issue" warnings" on Adobe bug tracker. A fix is confirmed for the Flex SDK, but no mention of Flash...
You can if you edit EnabledWarnings.xml in $Flash/$LOCALE/Configuration/Actionscript 3.0/EnabledWarnings.xml, where $Flash is the path to Flash inside your Applications/Program Files folder and $LOCALE is your language.
e.g.
/Applications/Adobe Flash CS4/en/Configuration/ActionScript 3.0/EnabledWarnings.xml
You will need to edit line 29, setting the enabled attribute to false for warning with id 1090:
<warning id="1090" enabled="false" label="kWarning_DepricatedEventHandlerError">EventHandler was not added as a listener.</warning>
Quick sidenote:
"Flash Builder (CS4)" is a confusing term. After Flex Builder 3, Flex Builder got renamed to Flash Builder, there is no Flash Builder CS4. The regular Flash IDE is known as Flash Professional/Flash Professional CS4, this was to avoid confusion between products with similar names: Flash Catalyst, Flash Builder(was Flex Builder), Flash Professional. Obviously it doesn't always work that great :)
What about changing the name of the function being called from onMouseDown to handlerOnMouseDown. Would it solve the issue?
Are you using Flex Builder?
If so, go to Project -> Properties -> Flex Compiler. There you can add arguments to the compiler.
Why are you overriding that? It never existed in the first place. The error message is actually telling you something useful. Don't suppress it.
If you want to create an event handler called onMouseDown, try something like
private function onMouseDown(e:MouseEvent) : void {
// statements
}
I agree with the previous post; the message is trying to tell you that you need to register that event handler. Just adding a method called onMouseDown() won't do it. What you need to do is to add something like
addEventListener(MouseEvent.MOUSE_DOWN, onMouseDown);
in either your constructor or maybe in the parent component.
You can filter out these warnings using Flash Builder's problems filtering capability:
open problems view
on the right click on the small triangle that opens a drop-down menu
select Configure Contents...
on the left side, create a new configuration, name it as you wish
on the right side adjust its settings:
Scope: On any element in the same project (or anything you want)
Description: choose doesn't contain and type in Migration issue (this will filter out warnings with migration issue in the description)
choose at least Flex problems
You can combine predefined and custom configurations by selecting more then one on the left side.
I'm working on a Flex application that processes and displays small amounts of HTML, sometimes including images. I'm getting the HTML out of third-party RSS feeds. Sometimes, I see this in a pop-up window:
Error #2044: Unhandled IOErrorEvent:. text=Error #2035: URL Not Found.
The RSS URL is just fine, but there's apparently something in the downloaded HTML that's causing a problem. Since the application is meant to run as part of a non-interactive digital sign, anything that requires a click to continue is completely unacceptable. I don't care how useless or malformed a URL is; the app needs to ignore the problem without pestering the user.
Unfortunately, I'm having no luck trapping this event. I'm sprinkling calls like this liberally through the code:
[object].addEventListener(IOErrorEvent.IO_ERROR, handleIOError);
... where [object] is everything from the mx:Text object rendering the HTML to its mx:Canvas parent to the mx:Application top-level app, and handleIOError is a simple function that looks like this:
private function handleIOError(event:IOErrorEvent):void {
trace ("IO error occurred: " + event);
}
But so far, nothing; that bloody error keeps popping up in the Flash player. Does anybody have any insight as to where I'm going wrong?
Make sure you are putting the event on the right object. I haven't done a whole lot of remote loading in Flex, but in Flash, a hilarious and annoying quirk is that when you use the Loader class to load images, the object you need to put event handlers on is NOT the Loader itself, but a property of the loader called contentLoaderInfo.
Read the docs carefully on the objects you are using, a similar pitfall might be at play.
IOErrorEvent is not bubbled so you cant catch or control it if someone else is implementing it.
Please find out which third party component you are using and try to get source if its open source or read some documentation or ask support guys on how to turn off this alert.
For example, if I made RSS component for flex and on error if I displayed the alert, if you use my component, whatever you can do you cant turn off my error alert unless i have provided you a boolean switch to turn it off. So this is really a problem with who has written the code for this alert box. Whatever you do you will not be able to turn this thing off. Except reverse engineer, change the code and recompile it, but it should be legal.