CommunityTSC
Screensaver
Note: The screensaver is an ADD-ON to the existing client,
it is not stand alone.
Please follow these installation
instructions:
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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