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Spark list ItemRenderer 'data' is null.
I use the same code in one place that I use in another, and still the event creationComplete that they prepare in the itemRenderer, the first line of code, trace("data") returns "null".
This code has been fine for months of work and suddenly stopped working with no explanation. I lost two days within period of fixation which should not be broken and I'm no closer to a solution. Very frustrated. Any help appreciated - greatly.
Puddleglum.
= Component relevant code containing spark list = Output from the console displayed in the form of comments
[Bindable]
public var itemArray:ArrayCollection = new ArrayCollection();
[Bindable]
private var gap: uint = 6;
private var file:File;
private var fileStream:FileStream;
private var toolXML:XML;
protected function creationCompleteHandler (): void
{
trace ("FUNCTION MyLibraryToolsPanel creationCompleteHandler()");
file = parentApplication.getFileOperations () .getToolFilepath ();
trace ("file:" + file.url);
}
private void loadTool(xmlFilepath:File,_xmlFilename:String):void
{
trace ("MyLibraryToolsPanel FUNCTION loadTool ("+ xmlFilepath.url +"," + xmlFilename + ")"); / / MyLibraryToolsPanel FUNCTION loadTool (app-storage: / Tools/User000000, 000000Tool1371827886983.xml)
var xmlFile:File = xmlFilepath.resolvePath (xmlFilename);
If (xmlFile.Exists)
{
fileStream = new FileStream();
fileStream.open (xmlFile, FileMode.READ);
toolXML = XML (fileStream.readUTFBytes (fileStream.bytesAvailable));
fileStream.close ();
var obj:Object = new Object();
obj.xmlFilepath = xmlFilepath;
obj.xmlFilename = xmlFilename;
obj.XML = toolXML;
trace ("obj:" + obj); / / obj: [object Object]
trace ("FUNCTION MyLibraryToolsPanel loadTool\n"+obj.xml.toXMLString ()); / / returns the XML when uncommented
itemArray.addItemAt (obj, itemArray.length);
}
on the other
{
trace ("MyLibraryToolsPanel FUNCTION loadTool XMLFILE does NOT EXIST"); / / This will trigger never
}
< s:List id = "itemList".
useVirtualLayout = "false".
Changing = "listChangingHandler (Event)" "
Click = "Event.stopPropagation (); »
touchTap = "event.stopPropagation (); »
scrollSnappingMode = "tip".
Height = "height of {}.
interactionMode = 'touch '.
explicitHeight = "{height}".
dropEnabled = "false".
dragEnabled = "false".
dragMoveEnabled = "false".
allowMultipleSelection = "false".
alternatingItemColors = "[0xe6e6fa, 0xF0F8ff].
dataProvider = "{itemArray}.
itemRenderer = "converters. MyLibraryToolsPanelListItemRenderer ".
horizontalScrollPolicy = "off".
verticalScrollPolicy = "on".
borderVisible = "false".
visible = "{ItemArray.Length > 0} '"
includeInLayout = "{itemList.visible}" "
Width = "100%" >
< s:layout >
< s:VerticalLayout id = "itemListVerticalLayout" variableRowHeight = "false" gap = "0" / >
< / s:layout >
< / s:List >
< s:Label id = "noToolsMsg" text = "no tool saved available." horizontalCenter = "0" verticalAlign = "middle" red = "0" visible = "{itemArray.length == 0} ' includeInLayout ="{noToolsMsg.visible}"/ >"
< / s:Group >
= Renderer code that contains relevant sections =.
protected function creationCompleteHandler (): void
{
trace ("FUNCTION MyLibraryToolsPanelListItemRenderer creationCompleteHandler"); / / MyLibraryToolsPanelListItemRenderer FUNCTION creationCompleteHandler
trace ("data:" + data); / / data: null
dataProxy = new ObjectProxy (data);
...
Looks like I'll change to use instead of the creationComplete dataChange in all my custom converters. I can't believe I lost 2 days and more hair because of something so trivial as multithreading.
Really... You cannot MAKE something before that data is passed and the rendering engine is INSTANTIATED ONLY when an element is added to the dataProvider... Then... the procedure. Data added to dataProvider-online Insantiate WITH object relevant-Online Layout/rendering/upgrade to day-online THEN creationComplete(); Duh. creationComplete is a misnomer if you don't even have the relevant data that you use to CREATE the instance.
No doubt this would be avoided if the BUG that places the dummy rendering engine IN the dataProvider have been set, but as it is - not, been resolved, I have no choice but to disable put in virtual. Sage, grumble, winge winge winge-grouse.
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need help with change in spark list itemRenderer
Hey guys... so I have a spark list, where I've made available to tileLayout and I use the converter component to display an image and two buttons in each tile... what im trying to do is when you hover over each tile I want buttons fade in and out... and by default... I need to no visible buttons...
I had pimples fade in and out when you hover over the point... but the problem is that I have when I initialize the application buttons are all visible... If there is no sence...
any help is greatly appretiated!
Here is the code I have... can you tell me what changes I need to make...
<s:List id="searchResultImages" borderVisible="false" dataProvider="{searchImages}" width="100%" height="100%">
<s:layout>
<s:TileLayout requestedColumnCount="6" horizontalGap="30" columnWidth="100" rowHeight="85" />
</s:layout>
<s:itemRenderer>
<fx:Component>
<s:ItemRenderer>
<s:states>
<s:State name="hovered" />
<s:State name="normal" />
</s:states>
<s:transitions>
<s:Transition fromState="normal" toState="hovered">
<s:Fade id="hoveredFade" targets="{[delBtn, editBtn]}" alphaFrom="0.0" alphaTo="1.0" duration="1000" />
</s:Transition>
<s:Transition fromState="hovered" toState="normal">
<s:Fade id="normalFade" targets="{[delBtn, editBtn]}" alphaFrom="1.0" alphaTo="0.0" duration="1000" />
</s:Transition>
</s:transitions>
<s:VGroup>
<mx:Image source="{data.fileLoc}" width="100" height="50" useHandCursor="true" buttonMode="true" verticalCenter="0" />
<s:HGroup>
<mx:LinkButton id="delBtn" label="DEL" skin="{null}" color="#0184C7" rollOverColor="#333333" useHandCursor="true"
buttonMode="true" />
<mx:LinkButton id="editBtn" label="EDIT" skin="{null}" color="#0184C7" rollOverColor="#333333" useHandCursor="true"
buttonMode="true" />
</s:HGroup>
</s:VGroup>
</s:ItemRenderer>
</fx:Component>
</s:itemRenderer>
</s:List>
Hello
With a lot of intelligence are already integrated into state transitions, when for example the transition fading knows when to fade in or fade out, get your components placed in the States you want is all that is necessary.
This is a simple example, but as you can see there is almost no code involved...
http://gumbo.flashhub.NET/Cyber/ source included
David.
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Extend a component that extends already a spark list ItemRenderer
Hi all
I have the following situation: Im showing lists of very similar data objects (they extend the same parent) so to avoid many many itemrenderers changes (if I need to change something in common properties) when displaying of these data, I've defined a list of spark ItemRenderer (in MXML) that displays common properties (file called BaseRenderer.mxml):
< s:ItemRenderer >
in the Scripting section I override the property data set
some MXML, checkboxes, labels etc.
< / s:ItemRenderer >
Then, I created a specific itemrenderer which extended it (file SpecificRenderer.mxml):
< model: BaseRenderer >
Yet once I override the property data set
some labels ADITIONAL MXML, checkboxes, etc.
< / template: BaseRenderer >
When I run the application, and the specific rendering engine is used, it works (no errors are thrown), but it shows that the content of the specific rendering engine, nothing base converter is visible. What is the right way to do it, or do I have to replace some extra stuff in my specific converters?
Thank you.
One last thing, I just noticed, if I delete all the specific rendering MXML tags, basic converter content becomes visible, that it seems as if a specific content replaces content base. Is it possible to add mxml tags in the specificrenderer?
Yes I suspected them to be merged, and you gave me a good idea. As you say this behavior is worth between all components defined mxml, not only itemrenderers. I want to avoid actionscript converters because I don't (and used) have problems of performance anyway and I like the flexibility in design mode, to remedy this, I found another solution that I slightly modified. Some spark components inherit the mxmlContent property, which you can override. That's what I came up with in the end: I added the override of the property in the specific renderer and everything is shown as expected (because the basic elements are merged with those of the extended component).
override public function set mxmlContent(value:Array):void {}
var added: Boolean = true;
var int index = 0;
so that {(addition)
var element: IVisualElement = null;
try {element = super.getElementAt (index) ;} catch(e:Error) {}
If (element! = null) {}
value.push (element);
index += 1;
}
on the other
Add = false;
}
value. Reverse();
super.mxmlContent = value;
}
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How to dynamically add data in a Spark list control
Hi, I have a spark list in one of my custom components() control(id="Cclist") and a text input control. When a value is entered in the entry of the texts, I want to dynamically add the same in the list control. I tried to do the following:
protected function Cc_selectHandler(event:CustomEvent):void
{
var cctext:DisplayObject = event.data as DisplayObject
CcList.enabled = true;
CcListButton.enabled = true;
CcList.addChild(cctext);
}
But I get an error saying "addChild() is not available in this category. "Instead, use addElement(), or change the skin. So I tried to use addElement, but apparently it is not available at all. No idea what im doing wrong?
Add the text entered in the textinput to the dataProvider of the list in the appropriate format.
A simple example:
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Custom spark list control
I have a spark list control that displays a dynamically imported Images tilelayout. Basically, a bunch of thumbnail Images that appear in a tile layout. I slipped active so that I can reorganize these thumbnails and everything works great except for one thing, the who. In my itemrenderer I included Image in the State "dragging", but the image does not appear in the who. I'm basically just has a square semi transparent like my, but I want to be able to actually drag my sticker. Any ideas how to do this?
Here is my list:
< s:List id = "ImageList1" x = "77" y = "95" width = "858" height = "412" dataProvider = "{imageAC}".
itemRenderer = "converters. ImageACSmallItemRenderer"contentBackgroundColor ="0x000000 ".
borderVisible = 'false' dragEnabled = "true" dropEnabled = "true" dragMoveEnabled = "true".
allowMultipleSelection = "true" skinClass = 'skins. General.ListSkin' focusAlpha = '0' mouseMove = "getImageProxy (event)" >
< s:layout >
< s:TileLayout columnWidth = rowHeight = "76" "76" horizontalAlign = "center" verticalAlign = "middle".
horizontalGap = "8" verticalGap = "8" / >
< / s:layout >
< / s:List >
Here's my Itemrenderer:
< fx:Script >
<! [CDATA]
import mx.utils.ObjectProxy;
[Bindable]
public var dataProxy:ObjectProxy;
private function init (): void {}
dataProxy = new ObjectProxy (data);
}
]]>
< / fx:Script >
< s: states >
< s: State name = "normal" / >
< s: State name = "flat" / >
< s: State name = "selected" / >
< s: State name = 'slide' / >
< / s: states >
< mx:Image source = "{dataProxy.pathSmall}" horizontalCenter = red "0" = "0" includeIn = "normal, hovered, selected, dragging" / > "
< / s:ItemRenderer >
Thanks for any idea!
Hi Bill,
Looks like you create a new object for each ItemRenderer ContentCache, to create a single instance shared, add "static" like this:
static public var contentCache:ContentCache = new ContentCache();
This will ensure that the contentCache variable is shared between all of the ItemRenderers.
In addition, in my view, there is no need to explicitly call the contentCache like this:
contentCache.load(dataProxy.pathSmall);
Fixing the contentCache just the contentLoader on the Image property, the way you have done should be sufficient.
I just do a quick experiment and here is an example with an ItemRenderer that exposes the problem:
And here's workaround with contentCache (works well for me in the AIR):
See you soon,.
Evtim
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Spark list component Icon property?
in Flex 3.x the VBox property was property of the icon that you can use to set the images in the elements of the list as well as the label property. How can I get the same thing in a Flex 4 spark list component?
I would like something like 'iconField' property set to the list item, so that my itemrenderer can be generic and not worry for a specific type of object is passed in.
Thank you!
~ Mike
I have the subclass would list, add an iconField property and change the default
renderer a converter custom will check data [iconField] for a
icon and display it.
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How to refresh a Spark list manually?
Hello
I'll build a News Module, which consists of a DataGrid and a spark with a customItemRenderer list.
When I click on the item in the DataGrid control, I get the 'newsID' of the item clicked and receive the newsDetails associate my data in an ArrayCollection collection.
This table Collection is the dataprovider for my spark list.
Okay, well, when I click on the first point, nothing works like it supposed to be.
But when I click the second entry, for example, the list of the spark is not following and display the changed data but the ArrayCollections are updating of data.
I checked in the binder to an another DataGrid that owns the ArrayCollection as a DataProvider collection.
So my question now is to know how to manually refresh a list of Spark.
On google I found that someone suggested to set the ItemRenderer of the spark to null list and re - declare.
http://www.mail-archive.com/[email protected]/msg132923.html
How would I do this programmatically?
= null myList.itemRenderer and that?
My custom item converter is called HListRenderer.mxml
Any help is very appreciated
Marc
Try:
myList.itemRenderer = null;
Group1.itemRenderer = new ClassFactory (HListRenderer);
See the latest example of code here:
http://flexponential.com/2009/11/02/different-ways-of-assigning-an-item-renderer-in-Flex-4 /.
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Sharing data in a list
Hi all!
I apologize for this brings one more time, but I still can't understand how to SHARE data in a list item by clicking a button (not an element of action invoke). I think I'm close, but at the moment it does not work
I found some help on code 'share whatever it is' topics, but I can't get it work in the main.qml, the List.qml
any ideas?
Thank you
-Ali
hand. QML
import bb.cascades 1.0
import "common"
Page {
Container {
Container { // START WORKING CONTAINER
Label {
id:goodFruit
text: "Orange"
}
Label {
id:goodweight
text: "12oz"
}
Button {
text: "This works!"
onClicked: {
_app.share("I eat " + goodFruit.text + " that weigh " + goodweight.text);
}
}
} // END WORKING CONTAINER
Container { // START NON-WORKING ListView
ListView {
id: fruitList
dataModel: XmlDataModel {
source: "models/fruitModel.xml"
}
listItemComponents: [
ListItemComponent {
type: "header"
Header {
}
},
ListItemComponent {
type: "entry"
FruitListItem {
}
}
]
}
} // END NON-WORKING ListView
}
}
FruitListItem:
import bb.system 1.0
import bb.cascades 1.0
Container {
Label {
id: badfruit
text: ListItemData.FRUIT
}
Label {
id: badcolor
text: ListItemData.COLOR
}
Label {
id: badweight
text: ListItemData.WEIGHT
}
Button {
text: "Does NOT Work"
horizontalAlignment: HorizontalAlignment.Center
onClicked: {
_app.share("I can NOT share" + ListItemData.Fruit + ListItemData.COLOR + ListItemData.WEIGHT + "...Do you know why?");
}
}
}
I get the following error:
Asset:///common/FruitListItem.QML:26: ReferenceError: can't find variable: _app
Hello
It's all about context ListItem.
Give an id to fruitListItem, for example:
FruitListItem {
id: fruitListItem
}
Declare a function in the ListView:
ListView {
function getApp() {
return _app
}
Instead of _app.xxx () call fruitListItem.ListItem.view.getApp (.xxx ())
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Check the name of the class to list ItemRenderer
Hello
I'll put the itemRenderer of a Mobile spark list as follows:
var ir:ClassFactory = new ClassFactory (MyItemRenderer);
IR. Properties = {etc. etc..};
list.itemRenderer = ir;
How can I check if the list itemRenderer is MyItemRenderer or at least a class name string comparison?
Thank you.
The following should draw true:
var ir:ClassFactory = new ClassFactory (MyItemRenderer);
IR. Properties = {etc. etc..};
list.itemRenderer = ir;
Trace (.generator ClassFactory (list.itemRenderer) == MyItemRenderer)
-
Updated Kaspersky and have been asked to deny/allow the following "Setup of Kaspersky Safari Extension wants to use your confidential data stored in 'List of extensions Safari' in your keychain"-is it safe?
Update of Kaspersky, it asks me to deny/allow what follows - "Installer Kaspersky Safari Extension wants to use your confidential data stored in 'List of extensions Safari' in your keychain"-is it safe?
# Kaspersky is one of the worst AV packages that you can install on your Mac. I suggest that uninstall you it. All he will do on your Mac is causing problems and offer no addition protection what so ever.
Once you think you have managed to get rid of it, please download and install EtreCheck from http://etrecheck.com/
Run it and post the report here. From the snapshot of your Mac, we say if you missed any bit and pieces during the uninstallation of Kaspersky.
-
The data in the list scrolling
Hello world
I use the normal list in my app, bt the problem is that the width of the list item.
I have no problem with the list in landscape bt from potrait extra mode "".. "". are coming instead of data,
Is it possible to scroll through the data in the list, (average is the width exceed then automatically the data in the list will scroll,)
someone can help me. urgnt iam waitng...
Thanks in advance
I found the solution which equavalent to scroll.
I'm overiding method of label in the cell renderer class and applying the marquee event it is great it possible to scroll.
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Windows Media Player-how preventing "return to the previous list" to play?
Avoid "Return to the previous list" to play?
When the media player is opened & I right click, I have the previous choice of the "CV list." When I click it, it immediately starts playback of videos watched online. How I either (A) prevent to play, or (B) remove the previously posted videos before they are recovered? Thanks for the help.
Hello
You may need to click the button clear history, under the tab privacy see the article below for the procedure to do the same.
You can also choose the items to be stored, or disable the option to record any story completely. (Uncheck options under "store and view a list of frequently played")
Thanks and greetings
Umesh P - Microsoft technical support.
Visit our Microsoft answers feedback Forum and let us know what you think.
[If this post can help solve your problem, please click the 'Mark as answer' or 'Useful' at the top of this message.] [Marking a post as answer, or relatively useful, you help others find the answer more quickly.]
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Maps JSON data with two data in the list
Hey all,.
Been working with JSON data and informing the lists for a some time now, but im stuck now on a single set of data.
The data structure is the following:
[
{
data: {
children: [ {
{}
{}
{}
} ]
}
}
{
data: {
children: [ {
{}
{}
{}
} ]
}
}
]
The data that I take care of normally contains one of these structures and not 2 as in the above data. So what follows could could work:
const QByteArray response(reply->readAll());
ArrayDataModel *model = new ArrayDataModel();
bb::data::JsonDataAccess jda;
QVariantMap results = jda.loadFromBuffer(response).toMap();
QVariantList children = results["data"].toMap()["children"].toList();
model->append(children);
mListView->setDataModel(model);
However, it is now giving me an empty list. So how can I limit the above code to analyze and insert only the 2nd set of JSON data in the list?
Please let me know if it needs to be clarified. Any help is appreciated. Thank you!
Hello
It contains a list of maps. Have you tried something like the following:
bb::data::JsonDataAccess jda;
QVariantList results = jda.loadFromBuffer(response).toList();if (results.size() >= 2){
QVariantMap secondSet = results.at(1).toMap(); // to get the second map
QVariantList children = secondSet["data"].toMap()["children"].toList();
model->append(children);}
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On the forms send us and receive in return, data in the form of fields will be not print. We can view the data, but the fields to print Virgin. How can I fix it?
On the forms send us and receive in return, data in the form of fields will be not print. We can view the data, but the fields to print Virgin. How can I fix it?
OK, it's different. These text boxes are (at least engineering point of view) not considered form data, they are annotations (or markup). On your print dialogue box, you will see a group of "Comments & Form". Make sure that the first control is set to "Document and annotations:
After this change, you should see the markup of your impressions.
