Multi-monitor: popup dialogs are opened in the wrong place

[GoogleCodeExporter]

What steps will reproduce the problem?
1. multi-monitor environment, laptop (right) with external monitor (left)
2. open any dialog: Load/Save/About

What is the expected output? What do you see instead?
Expected: the dialog should appear centered on the UMLet window, irrespective 
of which monitor it's on
Instead: the dialog appears centered on the wrong monitor or centered on the 
combined workspace

What version of the product are you using? On what operating system?
UMLet 12.2
Ubuntu 12.04.3 LTS

Java(TM) SE Runtime Environment (build 1.6.0_45-b06)
or
OpenJDK Runtime Environment (IcedTea 2.3.10) (7u25-2.3.10-1ubuntu0.12.04.2)

Please provide any additional information below.

The behaviour varies between JDKs:
- with Sun JDK 1.6 the dialogs appear centered on the laptop monitor, even 
though the window is on the external monitor
- with OpenJDK 1.7 it's even worse: it wants to open the dialog centered on the 
combined workspace of the two monitors, but fails to realize that the built-in 
(laptop) monitor is to the right and opens the popup half-way off the 
right-hand edge!

Original issue reported on code.google.com by u.hertl...@gmail.com on 3 Dec 2013 at 2:37

[GoogleCodeExporter]

All popups are now centered on the main program frame
fixed in r806

Original comment by AFDiaX on 11 Dec 2013 at 8:56

• Changed state: Fixed
• Added labels: UMLet-12.3

[GoogleCodeExporter]

Original comment by AFDiaX on 3 May 2014 at 11:11

• Added labels: UMLet-13
• Removed labels: UMLet-12.3