Bug 780

Summary:	NEWT: EDTUtil: Exposed weakness of EDTUtil usage due to usage of WeakReference, i.e. higher retention of Display instances.
Product:	[JogAmp] Newt	Reporter:	Sven Gothel <sgothel>
Component:	core	Assignee:	Sven Gothel <sgothel>
Status:	RESOLVED FIXED
Severity:	enhancement
Priority:	---
Version:	1
Hardware:	All
OS:	all
Type:	---	SCM Refs:	453ccee8e3ce90956756d1582852b13f45cd2f38
Workaround:	---

Description Sven Gothel 2013-07-11 05:07:20 CEST

- WeakReference Change 99479bf3197cde8e89c5b499d135417863d521c7
    
    - Refines commits:
      feb352145af1643a57eaae99c0342e6f5e0f2a2e
      dec4b02fe4b93028c85de6a56b6af79601042d6e
      433e3914324b90c910b018bb7d9d80e814c67123
    
    Reviews EDTUtil API and usage:
      - less confusing / more determined EDTUtil API
      - EDTUtil's thread shall only be reset and started when required (-> lazy)
      - EDTUtil's instance in Display shall be handled thread safe w/o extra blocking
      - EDTUtil's implementations (Default, SWT and AWT) shall be aligned / similar as much as possible
    
    Further note: SWT's EDTUtil (NewtCanvasSWT) shall not use a reused Display instance due to it's
                  custom SWTEDTUtil. We may need to disable the ref. cache if custom EDTUtil (setEDTUtil)
                  is intended (used).