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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