Select a dataProvider with a ComboBox

[ZenAndy]

When the user makes a selection from a ComboBox (of a list of subjects), how do
I tell the dataProvider of the display element that the dataProvider has
changed?

e.g. <local:DisplayShelf id="shelf" dataProvider="{what_goes_here?}" />

[dietmar.paulus]

hey

just the id of the dataProvider should be placed.

e.g.:

<mx:ArrayCollection id="arcDP">
...
</mx:ArrayCollection>
<local:DisplayShelf id="shelf" dataProvider="{arcDP}" />

[ZenAndy]

hi

ok so far. but I want something like {arcDP.selectedItem} but that doesn't work.

Can you help me figure out how to just display the images by subject please?

[dietmar.paulus]

right this can't work, because an ArrayCollection has no selectedItem, just a
list or a datagrid can have a selectedItem, and these lists and datagrids are
based on your dataprovider so you can say.

<Your List>.selectedItem

or

<Your DataGrid>.selectedItem

A ComboBox has a selectedItem too.

[ZenAndy]

Logically I should be able to use the selectedItem of the ComboBox to tell the
Display which data to use. Do I have to filter my ArrayCollection to a new
ArrayCollection with just the data about the selected single subject and make
that the dataProvider?

[dietmar.paulus]

Hey

can you please specifiy your aim of the application and maybe post some code?

cheers

dietmar

[dietmar.paulus]

Hey this is a short example:

I have a comboBox with a dataprovider and a textAreat which displays the data
of the selectedItem of the combobox, if you change the comboBox also the
display data is changed.

Hope you search for something like this

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="absolute"
backgroundColor="white">

<mx:ComboBox id="cb" dataProvider="{_arcDP}" labelField="name"/>

<mx:TextArea top="40" width="100%" height="80"
text="{cb.selectedItem.field1 + ';;;' + cb.selectedItem.field2 + ';;;' +
cb.selectedItem.field3 + ';;;' + cb.selectedItem.field4}"/>

<mx:ArrayCollection id="_arcDP">
<mx:Object name="obj1" field1="Test 1 - Field 1" field2="Test 1 - Field 2"
field3="Test 1 - Field 3" field4="Test 1 - Field 4"/>
<mx:Object name="obj2" field1="Test 2 - Field 1" field2="Test 2 - Field 2"
field3="Test 2 - Field 3" field4="Test 2 - Field 4"/>
<mx:Object name="obj3" field1="Test 3 - Field 1" field2="Test 3 - Field 2"
field3="Test 3 - Field 3" field4="Test 3 - Field 4"/>
<mx:Object name="obj4" field1="Test 4 - Field 1" field2="Test 4 - Field 2"
field3="Test 4 - Field 3" field4="Test 4 - Field 4"/>
</mx:ArrayCollection>

<mx:Script>
<![CDATA[

]]>
</mx:Script>


</mx:Application>

cheers

dietmar

[Phread]

I get lots of error messages.....

warning: unable to bind to property 'field4' on class 'Object' (class is not an IEventDispatcher)

[dietmar.paulus]

Okay, these are not error messages, these are warnings, and this is just a
test-application,

if I would programm it in a real appliaction, I would use Objects of a self
written class where I have getter and setter methods for my object-fields, so I
wouldn't have these error messages.

[Phread]

Thank you for your help and advice. I missed your earlier question about the
application and sample code.
See [url]http://demo.quietlyscheming.com/displayShelf/index.html[/url]

I have hundreds of images which I want to display. I want the user to be able
to select a small group of images (by "subject") from a ComboBox. I have tried
many solutions but none have worked so far.

I have an XML file with the image data.
<pre>
<photolibrary>
<!-- Table images -->
<images>
<idx>1</idx>
<subject>Aerial Views</subject>
<date>1820</date>
<caption>plan</caption>
<filename>di_001.jpg</filename>
</images>
<images>
<idx>2</idx>
<subject>Aerial Views</subject>
<date>1950s</date>
<filename>di_002.jpg</filename>
</images>
</pre>

Does that help?

[Phread]

Thank you for your help and advice. I missed your earlier question about the
application and sample code.
See [url]http://demo.quietlyscheming.com/displayShelf/index.html[/url]

I have hundreds of images which I want to display. I want the user to be able
to select a small group of images (by "subject") from a ComboBox. I have tried
many solutions but none have worked so far.

I have an XML file with the image data.
<pre>
<photolibrary>
<!-- Table images -->
<images>
<idx>1</idx>
<subject>Aerial Views</subject>
<date>1820</date>
<caption>plan</caption>
<filename>di_001.jpg</filename>
</images>
<images>
<idx>2</idx>
<subject>Aerial Views</subject>
<date>1950s</date>
<filename>di_002.jpg</filename>
</images>
</pre>

Does that help?

[Phread]

Thank you for your help and advice. I missed your earlier question about the
application and sample code.
See [url]http://demo.quietlyscheming.com/displayShelf/index.html[/url]

I have hundreds of images which I want to display. I want the user to be able
to select a small group of images (by "subject") from a ComboBox. I have tried
many solutions but none have worked so far.

I have an XML file with the image data.
<pre>
<photolibrary>
<!-- Table images -->
<images>
<idx>1</idx>
<subject>Aerial Views</subject>
<date>1820</date>
<caption>plan</caption>
<filename>di_001.jpg</filename>
</images>
<images>
<idx>2</idx>
<subject>Aerial Views</subject>
<date>1950s</date>
<filename>di_002.jpg</filename>
</images>
</pre>

Does that help?

[Phread]

Thank you for your help and advice. I missed your earlier question about the
application and sample code.
See [url]http://demo.quietlyscheming.com/displayShelf/index.html[/url]

I have hundreds of images which I want to display. I want the user to be able
to select a small group of images (by "subject") from a ComboBox. I have tried
many solutions but none have worked so far.

I have an XML file with the image data.
<pre>
<photolibrary>
<!-- Table images -->
<images>
<idx>1</idx>
<subject>Aerial Views</subject>
<date>1820</date>
<caption>plan</caption>
<filename>di_001.jpg</filename>
</images>
<images>
<idx>2</idx>
<subject>Aerial Views</subject>
<date>1950s</date>
<filename>di_002.jpg</filename>
</images>
</pre>

Does that help?

[Phread]

Thank you for your help and advice. I missed your earlier question about the
application and sample code.
See [url]http://demo.quietlyscheming.com/displayShelf/index.html[/url]

I have hundreds of images which I want to display. I want the user to be able
to select a small group of images (by "subject") from a ComboBox. I have tried
many solutions but none have worked so far.

I have an XML file with the image data.
<pre>
<photolibrary>
<!-- Table images -->
<images>
<idx>1</idx>
<subject>Aerial Views</subject>
<date>1820</date>
<caption>plan</caption>
<filename>di_001.jpg</filename>
</images>
<images>
<idx>2</idx>
<subject>Aerial Views</subject>
<date>1950s</date>
<filename>di_002.jpg</filename>
</images>
</pre>

Does that help?

[Phread]

Thank you for your help and advice. I missed your earlier question about the
application and sample code.
See [url]http://demo.quietlyscheming.com/displayShelf/index.html[/url]

I have hundreds of images which I want to display. I want the user to be able
to select a small group of images (by "subject") from a ComboBox. I have tried
many solutions but none have worked so far.

I have an XML file with the image data.
<pre>
<photolibrary>
<!-- Table images -->
<images>
<idx>1</idx>
<subject>Aerial Views</subject>
<date>1820</date>
<caption>plan</caption>
<filename>di_001.jpg</filename>
</images>
<images>
<idx>2</idx>
<subject>Aerial Views</subject>
<date>1950s</date>
<filename>di_002.jpg</filename>
</images>
</pre>

Does that help?

[Phread]

Thank you for your help and advice. I missed your earlier question about the
application and sample code.
See [url]http://demo.quietlyscheming.com/displayShelf/index.html[/url]

I have hundreds of images which I want to display. I want the user to be able
to select a small group of images (by "subject") from a ComboBox. I have tried
many solutions but none have worked so far.

I have an XML file with the image data.
<pre>
<photolibrary>
<!-- Table images -->
<images>
<idx>1</idx>
<subject>Aerial Views</subject>
<date>1820</date>
<caption>plan</caption>
<filename>di_001.jpg</filename>
</images>
<images>
<idx>2</idx>
<subject>Aerial Views</subject>
<date>1950s</date>
<filename>di_002.jpg</filename>
</images>
</pre>

Does that help?