Flex :: Why Doesn't ListCollectionView Show New Items Added To The Underlying List
Jun 20, 2011
I have an (empty) ArrayCollection that I wrap with a ListCollectionView. Then I add a series of items to the ArrayCollection, but these are not showing up in the view.
public var transactions : ArrayCollection = new ArrayCollection();
public var filteredTransactions : ListCollectionView = new ListCollectionView(transactions);
transactions contains 150 items, filteredTransactions contains none. I originally thought it was the filter I was applying, but even when I remove the filter, I still get no items in the filtered list.
Do I need to add the items to the view as well as the underlying collection (this would seem to defeat the purpose of using a view though...)?
View 1 Replies
Similar Posts:
Aug 11, 2010
I'm using flex 4.1 to write an application. i read in the documents that has the rowCount property to set how many items to display. the does not have that property. how can I limit the list to display 3 items ?
View 3 Replies
Feb 6, 2009
Is there any way that I can clear all of the previously added items within a List?
View 4 Replies
Nov 3, 2011
I have an object that is instantiated, then placed into a property within a singleton (single instance) object. When a button is clicked an event is dispatched carrying a payload that references the display object that is held within the Singleton. When the event is heard, my view object adds the object to the display list e.g. addChild().The Item shows. Now If I hit another button an event is dispatched, and a new item is added to the display list via the method above and is seen. The 1st object is removed from the display list Here is my problem. When I click the button to load the 1st Object the above process is executed again but the object does not show.
I can run trace statements from the object that is supposed to be visible and they run fine. I even do a check to see if the visible property is set to true, and it is, but not object is on my screen. Code for this process.
//custom event carries the name of the page aka display object. this is a string
dispatchEvent(new MenuEvent(MenuEvent.CHANGE_VIEW_STATE, event.payload));
//When the event is heard, the following condinial is run
[code].....
View 3 Replies
Mar 29, 2012
I am dynamically creating a form on runtime of my application. The content of my form item (lets call it MyFormItemContent) looks like this (simplified):
<?xml version="1.0" encoding="utf-8"?>
<s:BorderContainer xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
width="100%" borderAlpha="0.0">
[code]...
If the validation of MyValidator has errors a red frame apears around the BorderContainer as intended. But unfortunatly the error text that should apear right to the form item doesn't. I'm thinkin it's a layout problem because I define the validator inside the form item content before adding it to the form. I've already debugged this and read documentations a lot.
View 1 Replies
Dec 1, 2009
How to make list items as tool tips for combo box items?
View 2 Replies
Aug 15, 2010
I'm creating a facebook application in flex. I'm actually working on the friends component that shows your friends who are using the application. now, each friend has a profile image.
I created the component using a s:List element.
In the Skin Class of the element i configured the requestedColumnCount to 3, which means it shows 3 friends. i added buttons to scroll left and right in the list.
Whenever I scroll to see a different friend, for a half of a second i see no image because the List component is loading the image in order to view it.
is there a way to make the list preload all the elements so i won't have this kind of problem ?
View 1 Replies
Dec 31, 2009
Here is a snip from within my code:
[Code]...
The 'recommendations' dataProvider is an ArrayCollection of String, which are generally sentences about as long as this one. By setting the variableRowHeight and wordWrap properties as shown, if a sentence is too long to fit on a single line, everything works fine- the row expands and the messages show on two lines, or occasionally three.
The space allocated for this panel within the entire canvas means if the total text size of 'recommendations' exceeds six lines, I need for the entire list scroll. This is also working just fine. The trouble is when using the mouse wheel to do the scrolling- Flex scrolls both the entire list and the single item where the mouse is hovering. Often this results in only the second half of a sentence being visible. Non-programmer friends I have asked to look at this noticed this, and tell me it as a problem. If a user does not notice the dual scrolling, and sees only a fragment of a sentence, it will be perceived as an error in the application.
[Code]....
View 1 Replies
Mar 15, 2011
I am trying to use ContextMenu() to display context menus in Flex 4.
Full Render code here [URL]
The problem is that the context menu does not change when I add items to it.
how to add a custom right click menu to a List box in flex (without using external JS, just using ContextMenu as Adobe intended.
View 2 Replies
Nov 23, 2009
while i using drag & drop from listbox1 to listbox2 ,how can i get all the items of listbox2 in flex
View 1 Replies
Aug 3, 2010
I have a Flex list and a custom ItemRenderer. I'd like to be able to have some items in the list use a different ItemRenderer (say, depending on the class of the item). Is this possible?
E.g.: <s:List dataProvider="{_systems}" itemRenderer="myItemRenderer"/>
Most items in _systems use myItemRenderer. But if element 3 of _systems is "specialSystem" the renderer would be "specialItemRenderer".
View 2 Replies
Apr 20, 2011
When adding/removing elements to/from a VGroup I need it to happen smoothly, resize the item. I believe I have to use transition effects. But how?
At item (element) level? At VGroup level? Should I use a DataGroup instead and do it at ItemRenderer level?
I've been trying to do it at item level but I still didn't manage to make it work and somehow it doesn't feel right. It feels like it should be done at a higher level.
For example, I defined a "death" state which resizes the item to height=0. But then, after it shrunk, it has to somehow notify VGroup in order for it to be removed or remove itself from VGroup. It feels unnecessarily complicated.
way to associate an effect to inserting and removing items from a VGroup?
View 2 Replies
Oct 6, 2010
I have a Spark List (spark.components.List) backed by an ArrayCollection for its dataProvider. The List has a vertical scrollbar when there's too many rows to display. What I want is when a new row is added to the List for it to scroll to the bottom to show that new row.
I've tried calling List's ensureIndexIsVisible from a listener on the ArrayCollection. This doesn't work because the List hasn't yet fully rendered the new row. It will either scroll to the second from the last row, or throw the exception:
[Code]...
View 3 Replies
Nov 12, 2009
I am using a TileList control with an effect sequence linked to the itemsChangeEffect property.[code]...
However, my data provider is a ListCollectionView that I use to filter items. When I set a filter criteria, it will hide a couple of items from the TileList but there is no animation like when I remove an item. Is there a way to animate the TileList when an item is filtered ?
View 1 Replies
Mar 18, 2010
I have a list item with buttons in it like so:
<mx:List contentBackgroundAlpha="0" baseColor="0x333333" leading="10" id="weekButtonList" width="260" borderVisible="false" dataProvider="{_data.mappoints.week.@number}" itemClick="onWeekClick(event);" >
[Code]....
No matter what I do, these buttons have a vertical gap inbetween them. I have tried everything from setting the "vertical-gap" property to negative and positive numbers as well as changing the padding-bottom and padding-top on them. I want the buttons to be right up against eachother vertically. I have also tried "button-height" and padding on the List component...still nothing. How do I control this?
View 3 Replies
Mar 31, 2010
How to enumerate items of Spark List component after setting dataProvider property?
I mean accessing them as DisplayObject instances.
View 1 Replies
Apr 28, 2010
I have a List of items which is based on the contents of the "category" that a user selects
When the user changes selection, I change the dataProvider of the list be be the contents of the current category.
Sometimes the list contains items, sometimes it does not
Is there a way of hiding the list when it has no items?
I know that I could do this when setting the dataProvider, but it seems like there should be an event or something else that I could be using.
View 2 Replies
Aug 26, 2010
Is there any way to get the sum of items based on some filters from sharepoint list? I was trying to access the GetListItems method. But this returns all the items in the list. That makes the data heavy. My requirement is to get only the sum of items. For example items created in a specific year.I am trying to populate a chart in flex from the sharepoint list. Accessing all the items and then calculating the sum in flex will not work always where the list contains more items.
View 1 Replies
Jan 27, 2011
In Flex 4 I have a list where every product in it is rendered through an ItemRenderer. Now, when I filter the list I want to fadeout the products that are removed. I can't add the fadeout effect to the hideEffect of the item renderer since renderers are being reused. Anyone a valid (easy) solution on how the fadeout the products correctly.
View 1 Replies
Jul 19, 2011
I'm sure someone must have accomplished this before, but I couldn't find any article on this.
How can we scroll a List control (with uses an itemrenderer) to the next item, when the user tabs from the current item to the next?
I know that we can use scrollToIndex(i), but how do we notify the List that the itemrenderer has moved to the next index? I couldn't find any such event.
View 1 Replies
Jul 31, 2011
i am using an itemRenderer in mx:list, it has many text fields and combos, i use this item renderer to edit items in array collection, each item in the arrayCollection is of type Action which comes from BlazeDS remoting as a valueObject.my problem is when i add new item of type Action to the list dataProvider (ArrayCollection) by this code
myList.dataProvider.addItem(new Action());
the new item tooks the same data from its previous item.
View 1 Replies
Dec 8, 2011
ListCollectionView is often promoted as a great way to daisy-chain different views of the same data. You have some source collection and then use ListCollectionView + filterFunction to wrap the source data and present a subset of that source collection. When the source collection changes (either adds or removals), the chained LCV gets updated automatically. However, if the filterFunction for the source collection changes, it does not appear to propagate to the chained LCV:
[Code]...
At this point, I would expect justMatts to receive a CollectionChangeEvent and rerun its filter. Since all Matts have been filtered out of the source object, justMatts would be empty as well. However if you look in ListCollectionView code, they don't handle a CollectionEventKind.REFRESH which is what gets fired when source gets a new filter applied. Am I doing something wrong here (using wrong class, etc) or does nothing in Flex support the changes to source filter.
I can get this working as I expect it to by manually dispatching a CollectionEventKind.RESET on source, but I was hoping to not have to subclass anything.
View 1 Replies
Oct 19, 2009
I am trying to display a list of items in a datagrid from a XMLList.
<Series no="1">
<file>
<filenum>1</epnum>
<prodnum>4V01</prodnum>
[code]...
My current code allows me to retrieve every Series into an XMLList and then i have a nesteddatagrid class that allows me to do things like.
<classes:NestedDataGrid width="100%" height="100%" id="gridFiles" dataProvider="{filesList}" >
<classes:columns>
<mx:DataGridColumn headerText="Season" dataField="@no" width="60"/>
[code]...
However this displays the datagrid with two rows, the first row has 1 in the Series column and then the two files crammed into the second cell in the same row. The second row is the same but has the number 2 in the Series column and the two series #2 files crammed into the cell next to it.If i do not use the nested data class i can pull the files using Series.file instead and all 4 of the files list correctly, however i do not get the Series number for each...
View 1 Replies
May 21, 2010
I have a s:List where I've defined my own itemRenderer, and would like to insert a horizontal line separating items, similar to the way the mx:LinkBar works. I don't want to have a line at the top or bottom of the list, so I can't just include an upper or lower border in the itemRenderer. I was hoping the itemRenderer could be made aware of its index in the list, but I don't see how.
View 2 Replies
Mar 2, 2011
I have provided an ArrayCollection to a List, works fine, scroll and sweet.
I am able to access the carretIndex (though not necessarily the ones in view) by
list.caretIndex
Is it possible to access the list of items currently visible in the List.
What I am curious to know, is how can I can access (read) the first (or any of the) item in a given View port of the list.
View 2 Replies
Mar 4, 2011
[code]I want to extend the list with hyperlinks. For example in every node I should have an href attribute also. Then I need to redirect users to the selected item. I know Flash has the URLRequest class. The little problem I have now is to get the selected item. It propably is because of the dataprovider is xml and I haven't done the correct casting.
View 2 Replies
Apr 4, 2011
I have a Spark.List with several items ("folders") each containing an ArrayList of files inside, when I select one of these "folders" it should display the list of "files" on another Spark.List. Its working right now by doing this:
private function onFolderChange (event:*):void {
var list:List = event.currentTarget as List;
if (list.selectedIndex != -1) {
currentFolder = null;
currentFolder = list.selectedItem;
fileListDataProvider = currentFolder.files;
fileList.selectedIndex = -1;
}}
The problem is that when the "file" thumbnails cover more then the List viewport and a scroll is needed sometimes by changing from a "folder" to another "folder" the file List loses files. For example lets say there is a "Folder 1" with 30 "files" in it (10 visible and 20 hidden by the scroller) and "Folder 2" has 5 "files" (all visible), if I switch back and forth between "folders" sometimes it will display everything right. Sometimes it will display a scroll on "Folder 2" when there is no need and sometimes it will only display a few (5 or 10) "files" in "Folder 1" even though it has 30. Something is wrong with the fileList, its updating its items but not really updating well. I've tried setting the itemRenderer to null and reapplying, setting the dataProvider to null and reapplying, doing validateNow().
View 1 Replies
Jun 27, 2011
I just started using Flash Builder 4 (yesterday infact).
I have two lists and a canvas. When dropping a list item onto the canvas, i want to trace what item it is (the label and data) and which list it came from. From there, i want to add an image to the canvas according to the dropped item.
Here's my current code
private function componentDragEnterHandler(event:DragEvent):void {
DragManager.acceptDragDrop(Canvas(event.currentTarget));
DragManager.showFeedback( DragManager.COPY );
}
[Code].....
View 1 Replies
Jul 21, 2011
Highlighted portion in red! How do i remove it? Code to render list is below:
<s:List id="ui_lstIndexList" width="175" height="600" fontFamily="TwinCen"
fontSize="24"
alternatingItemColors="[]" borderVisible="false" downColor="#7fceff"
[code].....
View 3 Replies
Apr 12, 2010
I have:
an ArrayCollection of Numbers;
a List using the above ArrayCollection as it's dataprovider, and virtualLayout=true;
a custom ItemRenderer that shows a label with:
a) the number
b) an y position depending on the number AND the highest number visible
In another words, if I have 10 numbers in the AC, and only 5 appear on the screen, the y position of those 5 will depend on the value of the maximum number for those 5. When the user scrolls, of course those 5 elements change so the position of the label in item renderers will change.
1) How can I get the list of items that are "currently" visible?
2) Which event/method to override will help me know that the List was scrolled/the visible items changed?
View 3 Replies
