Changes between Initial Version and Version 1 of ScreenshotRecorder

Timestamp:

09/17/08 15:38:06 (17 years ago)

Author:

schwarz

Comment:

--

ScreenshotRecorder

@@ +1 @@
+= Screenshot Recorder =
+
+The screenshot recorder is included in the UOH but '''disabled per default'''.
+
+If activated, the recorder continuously observed the user's screen. If the currently taken screenshot differs from the previously taken one, the screenshot is stored (in your home directory in the folder {{{.UserObservationHub/screenshots}}}). Additionally, a smaller thumbnail of this screenshot is stored at {{{.UserObservationHub/screenshots/thumbnails}}}).
+
+For both images the format PNG is used, which leads to image sizes of about 139 kB for the screenshots and about 13 kB for the thumbnails.
+
+To '''activate''' the screenshot recorder you have to set a non-zero screenshot_interval in the UOH property file:
+
+== Property file ==
+
+The !ScreenshotRecorder expects to find a property file at this location:
+{{{
+    etc/userobservationhub.properties    (relative to the UserObservationHub project folder)
+}}}
+If this file does not yet exist, please create one, e.g. via Create new -> Textfile.
+
+Add or edit the following line there (do not delete other lines):
+{{{
+screenshot_interval=1000
+}}}
+
+This value specifies the number of '''milliseconds''' the screenshot recorder waits before taking and checking a new screenshot.
+As Java's screenshot and image routines are not very efficient, you may have to set a higher value here.
+
+To '''disable''' the screenshot recorder again, just edit the property file, edit the line to
+{{{
+screenshot_interval=-1
+}}}
+and kill and restart the UOH.