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Posted to dev@flex.apache.org by "Carlos Rovira (JIRA)" <ji...@apache.org> on 2013/03/24 13:35:15 UTC
[jira] [Updated] (FLEX-28967) PopUpManagerImpl - centerPopUp method
- TypeError: Error #1009: Cannot access a property or method of a null
object reference
[ https://issues.apache.org/jira/browse/FLEX-28967?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Carlos Rovira updated FLEX-28967:
---------------------------------
Description:
Steps to reproduce:
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600">
<fx:Script>
<![CDATA[
import mx.managers.PopUpManager;
protected function button1_clickHandler(event:MouseEvent):void
{
PopUpManager.centerPopUp(w);
}
]]>
</fx:Script>
<s:Button click="button1_clickHandler(event)"/>
<s:TitleWindow id="w" bottom="10"/>
</s:Application>
1. using PopUpManager
Error in the code:
public function centerPopUp(popUp:IFlexDisplayObject):void
{
if (popUp is IInvalidating)
IInvalidating(popUp).validateNow();
const o:PopUpData = findPopupInfoByOwner(popUp);
// If we don't find the pop owner or if the owner's parent is not specified or is not on the
// stage, then center based on the popUp's current parent.
var popUpParent:DisplayObject = (o && o.parent && o.parent.stage) ? o.parent : popUp.parent;
if (popUpParent)
{
var systemManager:ISystemManager = o.systemManager;
.
.
.
.
If const "o" is null, popUpParent is set to popUp.parent as stated by condition above.
However in next step you assume that const "o" exists because you're asking for o.systemManager, but o is null.
Therefore: TypeError: Error #1009: Cannot access a property or method of a null object reference
Fix:
public function centerPopUp(popUp:IFlexDisplayObject):void
{
if (popUp is IInvalidating)
IInvalidating(popUp).validateNow();
const o:PopUpData = findPopupInfoByOwner(popUp);
var popUpParent:DisplayObject = (o && o.parent && o.parent.stage) ? o.parent : popUp.parent;
if (popUpParent)
{
var systemManager:ISystemManager;
if (o != null) {
systemManager = o.systemManager;
} else if (popUpParent.hasOwnProperty("systemManager")) {
systemManager = popUpParent["systemManager"];
} else if (popUpParent is ISystemManager) {
systemManager = popUpParent as ISystemManager;
}
if (!systemManager)
return; // or throw exception maybe ?
.
.
.
.
was:
Steps to reproduce:
1. using PopUpManager
Error in the code:
public function centerPopUp(popUp:IFlexDisplayObject):void
{
if (popUp is IInvalidating)
IInvalidating(popUp).validateNow();
const o:PopUpData = findPopupInfoByOwner(popUp);
// If we don't find the pop owner or if the owner's parent is not specified or is not on the
// stage, then center based on the popUp's current parent.
var popUpParent:DisplayObject = (o && o.parent && o.parent.stage) ? o.parent : popUp.parent;
if (popUpParent)
{
var systemManager:ISystemManager = o.systemManager;
.
.
.
.
If const "o" is null, popUpParent is set to popUp.parent as stated by condition above.
However in next step you assume that const "o" exists because you're asking for o.systemManager, but o is null.
Therefore: TypeError: Error #1009: Cannot access a property or method of a null object reference
Fix:
public function centerPopUp(popUp:IFlexDisplayObject):void
{
if (popUp is IInvalidating)
IInvalidating(popUp).validateNow();
const o:PopUpData = findPopupInfoByOwner(popUp);
var popUpParent:DisplayObject = (o && o.parent && o.parent.stage) ? o.parent : popUp.parent;
if (popUpParent)
{
var systemManager:ISystemManager;
if (o != null) {
systemManager = o.systemManager;
} else if (popUpParent.hasOwnProperty("systemManager")) {
systemManager = popUpParent["systemManager"];
} else if (popUpParent is ISystemManager) {
systemManager = popUpParent as ISystemManager;
}
if (!systemManager)
return; // or throw exception maybe ?
.
.
.
.
> PopUpManagerImpl - centerPopUp method - TypeError: Error #1009: Cannot access a property or method of a null object reference
> -----------------------------------------------------------------------------------------------------------------------------
>
> Key: FLEX-28967
> URL: https://issues.apache.org/jira/browse/FLEX-28967
> Project: Apache Flex
> Issue Type: Bug
> Components: PopUp Manager
> Affects Versions: Adobe Flex SDK Previous
> Environment: Affected OS(s): All OS Platforms
> Affected OS(s): All OS Platforms
> Browser: Internet Explorer 8.x
> Language Found: English
> Reporter: Adobe JIRA
> Assignee: Carlos Rovira
> Labels: EasyFix
> Fix For: Apache Flex Next
>
>
> Steps to reproduce:
> <?xml version="1.0" encoding="utf-8"?>
> <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
> xmlns:s="library://ns.adobe.com/flex/spark"
> xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600">
>
> <fx:Script>
> <![CDATA[
> import mx.managers.PopUpManager;
> protected function button1_clickHandler(event:MouseEvent):void
> {
> PopUpManager.centerPopUp(w);
> }
> ]]>
> </fx:Script>
>
> <s:Button click="button1_clickHandler(event)"/>
>
> <s:TitleWindow id="w" bottom="10"/>
>
> </s:Application>
> 1. using PopUpManager
>
> Error in the code:
> public function centerPopUp(popUp:IFlexDisplayObject):void
> {
> if (popUp is IInvalidating)
> IInvalidating(popUp).validateNow();
> const o:PopUpData = findPopupInfoByOwner(popUp);
>
> // If we don't find the pop owner or if the owner's parent is not specified or is not on the
> // stage, then center based on the popUp's current parent.
> var popUpParent:DisplayObject = (o && o.parent && o.parent.stage) ? o.parent : popUp.parent;
> if (popUpParent)
> {
> var systemManager:ISystemManager = o.systemManager;
> .
> .
> .
> .
> If const "o" is null, popUpParent is set to popUp.parent as stated by condition above.
> However in next step you assume that const "o" exists because you're asking for o.systemManager, but o is null.
> Therefore: TypeError: Error #1009: Cannot access a property or method of a null object reference
> Fix:
> public function centerPopUp(popUp:IFlexDisplayObject):void
> {
> if (popUp is IInvalidating)
> IInvalidating(popUp).validateNow();
> const o:PopUpData = findPopupInfoByOwner(popUp);
>
> var popUpParent:DisplayObject = (o && o.parent && o.parent.stage) ? o.parent : popUp.parent;
> if (popUpParent)
> {
> var systemManager:ISystemManager;
> if (o != null) {
> systemManager = o.systemManager;
> } else if (popUpParent.hasOwnProperty("systemManager")) {
> systemManager = popUpParent["systemManager"];
> } else if (popUpParent is ISystemManager) {
> systemManager = popUpParent as ISystemManager;
> }
>
> if (!systemManager)
> return; // or throw exception maybe ?
> .
> .
> .
> .
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