[FLEX-22913] Calling DragManager.doDrag() inside an AIR application Causes a Null Pointer Exception

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: Adobe Flex SDK 4.5 (Release)
• Fix Version/s: Adobe Flex SDK 4.0 (Release)
• Component/s: Drag and Drop
• Environment: Affected OS(s): Windows; Affected OS(s): Windows XP; Language Found: English
• Assignee: Adobe JIRA
• Reporter: Adobe JIRA
• Created: 26/Jan/10 16:46
• Updated: 02/Feb/10 14:27
• Resolved: 27/Jan/10 11:57

Description

Steps to reproduce:
1. Inside an AIR app, inside a MouseEvent handler, call DragManager.doDrag()
2. Start the app, and initiate a drag on your target (mine is an Image)

Actual Results:

An error occurs inside of NativeDragManagerImpl.as:doDrag():

line 314: dragManagerStyleDeclaration object is null, thus a null pointer exception is thrown.

What happens, according to the debugger, is when getStyleDeclaration("DragManager") is called on the line above, it returns null. If I change the string to "mx.managers.DragManager" and then execute the line (line 312), it returns a valid object for dragManagerStyleDeclaration.

Workaround (if any): None