Hi Raul,
I noticed you’re now listening to the model bead and not the strand. I’m not
sure now why that’s not working (we should check), but if the old way was
working, you can simply replace:
_model.addEventListener("selectionChanged", selectionChangedHandler);
With
(_strand as IEventDispatcher).addEventListener("selectionChanged",
selectionChangedHandler);
Thanks,
Yishay
From: Raúl Núñez<mailto:[email protected]>
Sent: Thursday, June 18, 2020 2:29 PM
To: [email protected]<mailto:[email protected]>
Subject: Problem with standardization of the new Bead ComboBoxItemByField
Hi:
I commited a PR (869) with a new Bead for ComboBox: ComboBoxItemByField.
Yishay said me that it could be very interesting to make some changes in
order to use the bead in a more generic way.
I've tried apply those changes but I haven't got it to work.
My problem is selectionChangedHandler never launches. I have checked with
another events as selectedItemChanged and selectedIndexChanged. Since the
handler is never launched, the selectedValue variable is not updated.
ComboBoxItemByField changes:
////////////////////////////////////////////////////////////////////////////////
//
// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You under the Apache License, Version 2.0
// (the "License"); you may not use this file except in compliance with
// the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
////////////////////////////////////////////////////////////////////////////////
package org.apache.royale.jewel.beads.controls.combobox
{
import org.apache.royale.core.IBead;
import org.apache.royale.core.IStrand;
import org.apache.royale.collections.CollectionUtils;
import org.apache.royale.events.Event;
import org.apache.royale.collections.ICollectionView;
import org.apache.royale.core.ISelectionModel;
/**
* The _modelItemByField class is a specialty bead that can be used with
* any _model control. This bead allows to select an item by field
*
* @langversion 3.0
* @playerversion Flash 10.2
* @playerversion AIR 2.6
* @productversion Royale 0.9.4
*/
public class ComboBoxItemByField implements IBead{
protected var _model:ISelectionModel;
protected var _strand:IStrand;
/**
* constructor.
*
* @langversion 3.0
* @playerversion Flash 10.2
* @playerversion AIR 2.6
* @productversion Royale 0.9.4
*/
public function ComboBoxItemByField()
{
}
/**
* @copy org.apache.royale.core.IBead#strand
*
* @langversion 3.0
* @playerversion Flash 10.2
* @playerversion AIR 2.6
* @productversion Royale 0.9.7
*/
public function set strand(value:IStrand):void
{
_strand = value;
_model = _strand.getBeadByType(ISelectionModel) as
ISelectionModel;
_model.addEventListener("selectionChanged"
, selectionChangedHandler);
updateHost();
}
private var _valueField:String;
/**
* The string that will be used for comparison field name
*
* @langversion 3.0
* @playerversion Flash 10.2
* @playerversion AIR 2.6
* @productversion Royale 0.9.4
*/
public function get valueField():String
{
return _valueField;
}
public function set valueField(value:String):void
{
_valueField = value;
updateHost();
}
private var _selectedValue:*;
/**
* Any kind of object to perform the comparison or select
* the item with this value in the field.
*
* @langversion 3.0
* @playerversion Flash 10.2
* @playerversion AIR 2.6
* @productversion Royale 0.9.4
*/
public function get selectedValue():*{
return _selectedValue;
}
public function set selectedValue(value:*):void{
_selectedValue = value;
updateHost();
}
/**
* This bead allows update the selected item of the _model
through the entered field
*/
protected function updateHost():void
{
if(_model && valueField != "" && selectedValue != null){
var aux:* = CollectionUtils
.getItemByField(_model.dataProvider as ICollectionView
,valueField,selectedValue);
if(aux == null){
_model.selectedItem = null;
_model.selectedIndex = -1;
} else if (aux!==_model.selectedItem){
_model.selectedItem = aux;
}
}
}
/**
* Select the right item for the _model.
*
* @param event
*/
protected function selectionChangedHandler(event:Event):void{
if(valueField != "" && _model){
var selectedItem:Object = _model.selectedItem;
if(selectedItem != null
&& selectedValue !== selectedItem[valueField])
selectedValue = selectedItem[valueField];
}
}
}
}
Componente example:
<j:ComboBox percentWidth="90" localId="comboCenter" labelField="displaytext"
dateprovider="{centers}">
<j:beads>
<j:ComboBoxItemByField valueField="code" localId=
"comboCenterItemByField" />
</j:beads>
</j:ComboBox>
Thanks!!
