ActionScript 3.0 :: Null Pointer When Using ViewStack?
May 22, 2009Code:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"
[code].....
Code:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"
[code].....
I am creating Dynamic Destinations
MessageBroker broker = MessageBroker.getMessageBroker(null);
MessageService service = (MessageService) broker.getService("message-service");
MessageDestination destination = (MessageDestination) service.createDestination("Group1");
[code].....
But I am getting Null Pointer Exception
MessageBroker broker = MessageBroker.getMessageBroker(null);
i'm using a Rails backend with my App and getting a AsyncToken returned from it (a DB-Call to be specific)As far as i know the AsyncToken returns a result event when done loading all data from the request, this way its possible to make sure all data was loaded before executing some function which uses the data. i tried the following implementation to get the AsyncToken converted into an Array and plotting its objects as strings to the user:
var dataSrv:services.databaseservice.DatabaseService = new services.databaseservice.DatabaseService;
dataSrv.addEventListener(ResultEvent.RESULT, dbListener);
//DBOPERATION returns my AsyncToken
var listData:AsyncToken = dataSrv.DBOPERATION;
But i keep getting a "null object-pointer" error!
I have a problem with an application that uses RobotLegs in a Flex module. I finally managed to load my module successfully, but when I try to add this line of code in the module view's Mediator:view.addElementAt(applicationContainer,0);
I get this error:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at mx.core::UIComponent/getStyle()
[code].....
I've read some previous post by others, and have got the concept of how to make it happen just need to ask a few specific questions, one is the action script for changing the movie to the cursor and telling it how to move as the mouse cursor, next question is how do i get to act as the mouse pointer for the whole page, for instance I'm using frames I've got my buttons in the left frame, with a banner it the nested top and then the pages of course load in the main frame, how when creating the mouse cursor do i get it to work all over the page? I wasn't sure if using the normal method if it acts through out the whole site or just over a flash movie.
View 3 RepliesI have begun on a list: My reference is null!Stage is null! Convert this code from as 2 to as 3 for me! Crossdomain policies are in the way of my cool idea Dynamic property names I need to use stuff on the parent! I don't want my children to scale when I scale the parent! Classes vs instances. Mod note: I do not want this topic pinned, we will use a fresh topic once we have agreed to the content.
View 9 Repliesthe script i wrote is working fine. but the script attached to the flash player which i have no control over is throwing a script error (im using IE8).how can i fix this? if i run it locally there is no error.
'null' is null or not an object
try { document.getElementById("").SetReturnValue(__flash__toXML(function() { return document.location.hostname; }()) ); } catch (e) { document.getElementById("").SetReturnValue("<undefined/>"); }
but this is from flash script and i dont have control over it. it just say JScript - script block.
I have create a menu but when clicking on menu so that it shows, I get an error on the line because of the line "myMenu.show(null,null)". See function below:
private function createAndShowmyMenu():void {
myMenu = Menu.createMenu(null, myMenuDataProvider, false);
myMenu.labelField="@label"[code]........
I'm using a viewStack which have is property resizeToContent set to true. When I'm selecting a child higher than the viewStack, it's correctly resized, but when I'm selecting another child which is smaller, the viewStack isn't resized! What I want is that my viewStack get the height of the selectedChild each time.
though, the Adobe doc say :
If true, the ViewStack container automatically resizes to the size of its current child.
I've got a Flex 3 project.Does deep linking only work on viewStacks? (My project doesn't have any viewStacks). I'd like to use deeplinking based on what was selected in a comboBox. I'd like the user to be able to bookmark or use the back button based on what was selected in the comboBox.The comboBox selection determines which data is pulled from the database.Is this possible? I set-up deeplinking in another project, but it had viewStacks. And all of the deep linking examples that I've seen use viewStacks.
View 1 Repliessometimes I remove child and trace it afterwards and it outputs null although I havent yet set it to null, why is that? and do I need to set it to null also in that case?
Code:
trace(holderArr[loadedThumbs].getChildByName("photo_bg"));
//[object MovieClip]
holderArr[loadedThumbs].removeChild(holderArr[loadedThumbs].getChildByName("photo_bg"));
[Code]....
in main.mxml :
public function init():void
{
PopUpManager.createPopUp(this,login,true);
}
[Code]....
How can i selectchild of main.mxml's Viewstack from login.mxml ?
I have as good as finished a new project I'm working on now for a while, and I have this small problem coming up at the fine tuning.The area of concern is so I believe the ViewStack I'm using, but I'm not sure so here the details.I have several check boxes (4), and only one at all times can be selected to show off associated Radio Buttons as a Group of (6). No RBtn pre selected.With the selection of a check box I also make visible a new Radio Button Group of (4). No RBtn pre selected here either.Now if I select one of the RBtn (6 - each has a different Paper size measurement showing) then I can view through a external Xml data file details as Size, basePrice and the totalPrice which is in this case the same as the basePrice!
This totalPrice is located on the first Canvas/Label in the VStack!Selecting any of the first three (3) of the second RBtn Group (4) No RBtn pre selected either! - it will show me a Paper type description, and by selecting the fourth RBtn it will show me as well a field with the extra costs for a Canvas type, and it should select the second Canvas of the VStack with the totalPrice which is basePrice plus the extrasCost Canvas Price.Now the problem is that my second VStack Canvas/Label = totalPrice (basePrice +extraCost) is not showing up immediately! (It just shows blank canceling the basePrice out), and only if I select another of the six (6) RBtn! then it is showing the second vStack with the totalPrice (basePrice +extraCost). From here on everything works perfectly!I think that I have to mention that my RBtn Group are working in a function If / Else / If /Else configuration where both the Labels on both VStack Canvases are called up at the same time. So therefore both Labels should have data available which than should be viewed when the VStack changes?
I'm trying to figure out how to in as3 (not mxml) add views to a view stack.For example I have a view component like so[code]I've being trying to add it to a viewstack in the following way.[code]I'm aware I have to assign ID's but for now I just want to get the view in there
View 2 RepliesI have a tabbar whose dataprovider is a viewstack and the viewstack contains a group of vbox containers. I am trying to hide one of the vboxes based on a certain condition but the tabbar still shows the corressponding tab for the hidden vbox. I set the visibilty and includeinlayout of the vbox to false but the tab still exists.
View 1 RepliesI want to know if I can use a tree and when and item in the tree is clicked the viewstack changes to that certain item?
View 1 RepliesMy Strucutre is like this.
<mx:ViewStack>
<mx:HBox>
<mx:Form>
[code]......
I have a ViewStack with 2 panels:
<mx:ViewStack id="viewstack1" height="243">
<mx:Panel id="gridPanel">
<mx:DataGrid id="grid" right="10" left="10" top="10" bottom="10" width="300" height="150" itemClick="showDetails(event)">
[Code]....
I want to have the user click a grid item in the first panel and then load the data in a panel in the second panel. I can grab the value of the index for the clicked item in the itemClicked handler, but how do I access the detailsPanel to set the values based on the row info from the Grid?
I want to add a component into a Viewstack dynamically in flex4. Like code below
[Code]....
But the code in comment doesn't play the effect. How can I implement it? Does the canvas have any hideffect or showeffect to Bind
I am trying to show the second index of my ViewStack via ActionScript. Basically a user logs in in the first index and will be "redirected" (for lack of a better word) to the second index of the VewStack. Currently I am just showing a different state (I have attached the code).
Code:
if(evt.result.loginsuccess == "yes")
{
currentState = "Logged In";
}
I'm having problems creating dynamic tabs here's my code:
mxml:
<s:TabBar x="1" y="1" height="32" width="100%" dataProvider="{tabHolder}" chromeColor="#EF8B01"/>
<mx:ViewStack x="2" y="34" id="tabHolder" width="100%" height="214" creationPolicy="all">
<s:NavigatorContent label="Home" width="100%" height="100%">
<mx:Image x="6" y="8" height="181" width="402"/>
[code]....
tab wasn't added, what is wrong?
In my flex project i used one option like Link button . If i like it will be open new page contain more information and components . Which container is suitable one ? Where is used viewstack and stages ?
View 2 RepliesWhat is the main difference Between ViewStack Container and Canvas?
View 1 RepliesSuppose I have a ViewStack like this:
<mx:ViewStack id="s" left="5" right="5" bottom="5" top="0" width="100%" height="100%" creationPolicy="all" minHeight="0">
<mx:Repeater id="repeater" dataProvider="{dp}" height="100%" width="100%" minHeight="0">
<mx:Box id="bx" label="{repeater.currentItem.label}" width="100%" height="100%" minHeight="0">
<mx:Label minHeight="0" width="100%" height="100%" label="bob" />
</mx:Box></mx:Repeater></mx:ViewStack>
With a large number of items in the stack (each having a large number of panels, databinding, etc), this gets extremely slow. The Repeater seems to trigger creation of all children regardless of the creationPolicy of the viewStack itself.
I have a piece of software I'm working on that is using a viewstack with 3 canvases. With the change event I need to look for index 2 which is the last canvas when it changes to this canvas I need it to grab data from inputs from the previous two canvases.Within the viewstack events I've assigned the function change() to the event childIndexChange.
Here is the method:
private function change():void
{
[code].....
I have a viewstack with 3 items in it. Now my problem is that I want all these components to be of the same size. Its simply enough to do this manually but is there any other way of setting the size for all the components at once?
View 2 RepliesI'm trying to create a wizard that will guide a user through a lot of individual containers I have built. I have a main page that has many checkboxes for the user, each checkbox ties to a container. What I would like to have happen is once a checkbox is clicked it makes that container visible, then the next and back buttons when clicked only go to the next visible container; thereby leaving off any containers from the wizard that were not checked on the main page.
View 1 RepliesI'm having problems creating dynamic tabs here's my code:
[Code]...
I have a viewstack with two tabs.In one of them there is a data grid shows a list of notes. The other one is includes a form that can edit notes or crates new note. I want the user to be able to add new note or edit existing note when clicks an item in data grid. I mean when user clicks an item the viewstack must become editor.
View 1 Replieshow I would pass a value to "SelectedChild" in ViewStack:
In the example below, I am trying to set a public property in a form called "register" after I have navigated there from another form called "login".
The result I get seems to be a compilation error:
Error: Access of possibly undefined property pagename through a reference
with static type mx.core:INavigatorContent.
vsMain.selectedChild.pagename = "register page";
[Code]....