Flex :: Scroll An Mx:List By Tabbing Through Items?

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.

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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]....

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[Code]....

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[code]...

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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.

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[Code].....

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Highlighted portion in red! How do i remove it? Code to render list is below:

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[code].....

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I have:

an ArrayCollection of Numbers;

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I'm trying to create a nested list in Flex which will dynamically resize to display all children when the data provider changes.

Here's a simplified example which illustrates the problem:

<mx:Script>
<![CDATA[
import mx.collections.ArrayCollection;

[Code].....

The list sizes remain static when items are added.

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I seem to have is that the Autocomplete component that seems to be part of flex extras is not displaying the list of items in the dropdown list. Basically, I get a list of blank items. I know they are there and they are the right items because as soon as I click on one, I get the right text in the combobox.

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<mx:FormItem label="Company:" width="750" fontSize="20" horizontalAlign="right" color="#000000" required="true">
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[Code]....

Again, when I type "T" in the text box I see a dropdown list with 3 empty items. Clicking on the third item puts "Test3" in the textbox. But the items themselves are not visible.

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[Code]....

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