david bel created FLEX-33685:
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Summary: Using keyboard selection in combobox ignores custom text
Key: FLEX-33685
URL: https://issues.apache.org/jira/browse/FLEX-33685
Project: Apache Flex
Issue Type: Bug
Components: Spark: ComboBox
Affects Versions: Apache Flex 4.9.0, Apache Flex 4.10.0
Environment: Windows 7, Intel i5, 4GB RAM
Reporter: david bel
When using keyboard navigation and selection the spark ComboBox control ignores
custom text entered by the user.
Steps to reproduce:
Compile and run the following simple application:
<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009";
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx">
<s:Group>
<s:layout><s:HorizontalLayout /></s:layout>
<s:ComboBox id="myCombo" width="200" >
<s:dataProvider>
<mx:ArrayList>
<fx:String>test1</fx:String>
<fx:String>test2</fx:String>
<fx:String>test3</fx:String>
</mx:ArrayList>
</s:dataProvider>
</s:ComboBox>
<s:TextInput id="myText" width="200" />
</s:Group>
</s:WindowedApplication>
Click in the combo box and type "abc"
Press shift + home
Actual: The selected text is "test1"
Expected: The selected text should be "abc"
I wrote a quick patch for this:
public class TestComboOverride extends ComboBox
{
public function TestComboOverride()
{
super();
}
override mx_internal function
keyDownHandlerHelper(event:KeyboardEvent):void
{
if ((event.keyCode == Keyboard.LEFT) || (event.keyCode
== Keyboard.RIGHT)
|| (event.keyCode == Keyboard.HOME) ||
(event.keyCode == Keyboard.END))
{
_proposedSelectedIndex = CUSTOM_SELECTED_ITEM;
}
super.keyDownHandlerHelper(event);
}
}
The problem appears to be that the _proposedSelectedIndex property remains set
to -2 [NO_PROPOSED_SELECTION] while entering the text, where it really should
have been -3 [CUSTOM_SELECTED_ITEM] unless the user happened to type a label
from the data provider in which case it should have the index of that item.
The DropDownListBase class maintains a "userProposedSelectedIndex" property
which appears to overlap in purpose with the proposedSelectedIndex property,
but does contain the correct value.
Unfortunately I have not yet been able to identify the exact place where the
value of _proposedSelectedIndex affects the selected item in the given scenario.
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