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ScreenSaver Install Instructions
Note: The screensaver is NOT a stand alone product.
It requires a full agent install first
1. Unzip the file "D2OLScreenSaver.zip" to a temporary
directory.
2. Copy or move the file "D2OL Screen Saver.scr" into your
Windows Directory.
Note: This directory may be called WinNT on some windows
platforms.
3. Bring up the "Display Properties", click on the "Screen
Saver" tab, and select the "D2OL Screen Saver" from the drop
down list.
4. Click on the "Settings..." button and verify that the
path displayed is the desired path to your Node Agent. If you
have more than one Node installed, you must choose the one
that you want the screen saver to launch (or communicate
with).
5. Select the desired screen saver Mode. If you select
"Full GUI", the screen saver will run the node with a
graphical display of the currently docking candidate (see the
section "Known Issues" for know issues on the "Full GUI"
mode). If you select "Blank Screen", the screen saver will
simply show a blank screen while running the node in the
background.
Note: Running in the "Full GUI" mode may be processor
intensive and will most likely slow down the Candidate
Processing Engine. To avoid this slowdown, run in the "Blank
Screen" mode.
Some Known Issues
1. Due to the fact that the D2OL Screen Saver is a hybrid
(a combination of a true Windows screen saver and the Node
Agent), it is not very responsive on slower machine or
machines with limited available memory. This means that it
might take a few seconds both to launch and to shutdown
(especially when running in the "Full GUI" screen saver mode).
2. On older Windows Operating Systems (Windows 95, Windows
98, and Windows Millennium), using the "Password protected"
option does not seem to work properly. If you are concerned
with restricting access to your computer while it is in Screen
Saver mode, and you are running on one of the above Operating
Systems, we highly suggest to NOT use the D2OL Screen Saver.
Note: While Password Protection seems to work fine on
Windows NT, Windows 2000, and Windows XP, we suggest testing
this if you are concerned with restricting access to your
computer while it is in Screen Saver mode. However, it should
work fine.
3. When running with the "Password protected" option on,
AND if the Node is already running when the D2OL Screen Saver
launches, AND if the desired screen saver mode is "Full GUI",
the Node's GUI window may not be displayed on some version of
Windows. This is due to the fact that some versions of Windows
seem to prevent already running processes from displaying
themselves when in "Password protected" mode. However, even
though the GUI window cannot be seen, it is still running and
potentially slowing down the Candidate Processing Engine (as
noted above, the "Full GUI" Screen Saver mode can slow down
the Candidate Processing Engine). Thus, if this is the case
for you, you can either 1) Run using the "Blank Screen" Screen
Saver Mode, 2) Turn the "Password protected" option off, 3)
Only run the Node with the Screen Saver (i.e. do not have it
running all the time), or 4) Choose not to use the D2OL Screen
Saver at all.
4. In some rare cases, it is possible to shut the D2OL
Screen Saver down before in can successfully communicate with
the running Node Agent. In this case, the Node can be left
running when it should shut down. If this happens, you can
shut the Node Agent down manually from the System Tray icon.
It is also possible, in these cases, for the full screen GUI
window to stay up and not go away on its own (if running in
"Full GUI" Mode). If this happens, simply mouse click on the
black background of the window and the main GUI will be
restored to its normal state. You can then shut the Node down
manually from the System Tray icon or leave it running if you
choose.
Note: This seems to mostly happen when running on newer
versions of Windows (Windows NT, Windows 2000, and Windows XP)
with the "Password protected" option on and when stopping the
screen saver by directly pressing
<CTRL>-<ALT>-<DEL>. If, however, you press
another key or use the mouse to turn off the screen saver
before pressing <CTRL>-<ALT>-<DEL> (and
allowing time for the Screen Saver to shutdown fully before
pressing <CTRL>-<ALT>-<DEL> or entering your
password), then this problem may not occur.
5. If the Node Agent is not running when the D2OL Screen
Saver launches, the Screen Saver will launch the Node using
its default Windows Controller (with the System Tray Icon).
Other controllers (Pure Java, CLI, or File Based) are not
currently supported.
6. If you are using large fonts, or a font scaling other
than the default of small fonts (defined in the Display
Properties), and you run in "Full GUI" Screen Saver mode, the
full-screen GUI window might be sized slightly incorrectly.
The result is that the right and bottom edges of the window
might not cover the entire screen.
The D2OL Screen Saver is meant to be an example
implementation. It is possible for interested users to write
their own screen savers if they choose. For Development
Details please refer to the readme file which comes with
D2OLScreenSaver.zip downloadable package. | 
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