The ASDoc for ArrayCollection lists removeItemAt() as an inherited method. Gordon Smith Adobe Flex SDK Team
From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On Behalf Of veena_kris2003 Sent: Tuesday, July 28, 2009 10:59 AM To: flexcoders@yahoogroups.com Subject: [flexcoders] Re: Question about a flex component How do I remove a specific item from a HorizontalList whose dataprovider is an ArrayCollection? Thanks, --- In flexcoders@yahoogroups.com<mailto:flexcoders%40yahoogroups.com>, Gordon Smith <gosm...@...> wrote: > > You add child components which are UIComponents to a container like HBox. > > But you add data items to a list-based control like HorizontalList. These > data items then get displayed by item renderers, which are children which get > automatically created to display data items. The children are managed by the > list, not by you... you manage the data, not the renderers. > > By default, data items are expected to have a 'label' property to display, > unless you set the labelField or labelFunction of the list component. They > can be plain Objects, or instances of data classes, or anything else, but > typically they aren't visual components. > > Here's an example of adding two data items to a list using ActionScript. > > myList.dataProvider = new ArrayCollection(); > var item:Object; > item = { label: "One", data: 1 }; > myList.dataProvider.addItem(item); > item = { label: "Two", data: 2 }; > myList.dataProvider.addItem(item); > > Gordon Smith > Adobe Flex SDK Team > > From: flexcoders@yahoogroups.com<mailto:flexcoders%40yahoogroups.com> > [mailto:flexcoders@yahoogroups.com<mailto:flexcoders%40yahoogroups.com>] On > Behalf Of veena_kris2003 > Sent: Friday, July 24, 2009 3:19 PM > To: flexcoders@yahoogroups.com<mailto:flexcoders%40yahoogroups.com> > Subject: [flexcoders] Re: Question about a flex component > > > > Please help. The items are being added dynamically to the <mx:HorizontalList > id="test" bottom="0" width="100%" > backgroundColor="0x000000" horizontalScrollPolicy="on" > verticalScrollPolicy="off"/> I debugged the code and the > items are being added, but I can't see them in the UI. > If I change mx:HorizontalList to mx:HBox I can see the items > in the UI. What am I doing wrong? > > --- In > flexcoders@yahoogroups.com<mailto:flexcoders%40yahoogroups.com><mailto:flexcoders%40yahoogroups.com>, > Gordon Smith <gosmith@> wrote: > > > > No, I don't have an example and don't have time to create one for you since > > I'm a development engineer, not a support engineer. But here is what you > > should try, learning as you go: > > > > 1. Create an app with an <mx:HorizontalList>. > > 2. Make it show data items by assigning its dataProvider. Put in more data > > items that will fit. > > 3. Turn off its scrollbar by setting horizontalScrollPolicy="off". > > 4. Create <mx:Button>s for "Previous" and "Next", positioned to the left > > and right of the HorizontalList. > > 5. In their 'click' handlers, put code like > > horizontalList.horizontalScrollPosition += 1. Use -= for the Previous > > button. > > > > Gordon Smith > > Adobe Flex SDK Team > > > > From: > > flexcoders@yahoogroups.com<mailto:flexcoders%40yahoogroups.com><mailto:flexcoders%40yahoogroups.com> > > > > [mailto:flexcoders@yahoogroups.com<mailto:flexcoders%40yahoogroups.com><mailto:flexcoders%40yahoogroups.com>] > > On Behalf Of veena_kris2003 > > Sent: Thursday, July 23, 2009 4:42 PM > > To: > > flexcoders@yahoogroups.com<mailto:flexcoders%40yahoogroups.com><mailto:flexcoders%40yahoogroups.com> > > Subject: [flexcoders] Re: Question about a flex component > > > > > > > > Do you mind posting an example. It sounds like this is what I was looking > > for. I need a horizontal list component with an icon at the right end of > > the component that I can click and scroll to more items. > > > > Thanks, > > > > Veena > > > > --- In > > flexcoders@yahoogroups.com<mailto:flexcoders%40yahoogroups.com><mailto:flexcoders%40yahoogroups.com><mailto:flexcoders%40yahoogroups.com>, > > Gordon Smith <gosmith@> wrote: > > > > > > Why not just allow scrolling instead of paging? Scrolling components can > > > scroll through thousands of items quickly. > > > > > > Suppose there are 100 items and you can only see 10 at a time. So first > > > you see 0-9. When you click the icon you see 10-19. When you click it > > > again you'd see 20-29. So you'd need another icon ("previous page" > > > instead of "next page") to go back to 10-19 and then 0-9. > > > > > > Gordon Smith > > > Adobe Flex SDK Team > > > > > > From: > > > flexcoders@yahoogroups.com<mailto:flexcoders%40yahoogroups.com><mailto:flexcoders%40yahoogroups.com><mailto:flexcoders%40yahoogroups.com> > > > > > > [mailto:flexcoders@yahoogroups.com<mailto:flexcoders%40yahoogroups.com><mailto:flexcoders%40yahoogroups.com><mailto:flexcoders%40yahoogroups.com>] > > > On Behalf Of veena pandit > > > Sent: Thursday, July 23, 2009 10:22 AM > > > To: > > > flexcoders@yahoogroups.com<mailto:flexcoders%40yahoogroups.com><mailto:flexcoders%40yahoogroups.com><mailto:flexcoders%40yahoogroups.com> > > > Subject: [flexcoders] Question about a flex component > > > > > > > > > Hi, > > > > > > I am new to Flex. I am looking for help on designing a custom component > > > that will > > > hold a lot of items. When the items exceed the number that are visible in > > > the ui > > > of this horizontal component on the webpage an icon appears, which if you > > > click > > > will show a list of the other components you can click again and restore > > > the ui with > > > that item. Hope you understand what I am talking about. If not please > > > post for clarification. > > > > > > Thanks in advance, > > > > > > Veena > > > > > >
