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https://issues.apache.org/jira/browse/PIVOT-878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13483400#comment-13483400
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Roger Whitcomb commented on PIVOT-878:
--------------------------------------
Yes, I would say these are really the same issue. I worked on integrating the
code in PIVOT-796 with current head revs and it was a bit tricky because a lot
of the functionality I already had done another way. So, I will go at it again
in the next couple of days to add the caching of file information and loading
the drive list in the background (which is the heart of the speedup).
> Show FileBrowserSheet while Initializing
> ----------------------------------------
>
> Key: PIVOT-878
> URL: https://issues.apache.org/jira/browse/PIVOT-878
> Project: Pivot
> Issue Type: Improvement
> Components: wtk-terra
> Affects Versions: 2.0.2
> Environment: All (Mostly Windows)
> Reporter: Ronald Thomas
> Assignee: Roger Whitcomb
> Priority: Minor
> Labels: Browsing, File, FileBrowserSheet, performance,
> responsiveness, wtk, wtk-terra
> Fix For: 2.1, 2.0.3
>
> Attachments: PIVOT-878_example_src.zip,
> tptp_profiler_exec_call_tree_screenshot.png
>
>
> If the list of file roots returned by
> http://docs.oracle.com/javase/1.4.2/docs/api/java/io/File.html#listRoots()
> includes more than a few network drives (primarily on windows where each
> mapped drive is its own "file system root"), or if the initial path on the
> FileBrowserSheet maps to a device that takes a while to "spin up", the
> FileBrowserSheet may not appear on the screen for several seconds making the
> Pivot app appear unresponsive. It would help if there were some indication
> of activity immediately after the call to the FileBrowserSheet.open() method.
> The FileBrowserSheet could be displayed in a "loading" mode and then
> switched to its normal display mode once the potentially long-running
> initialization has completed.
> In this case, the long running code is around line 936-947 of the 2.0.2
> release source file at
> wtk-terra\src\org\apache\pivot\wtk\skin\terra\TerraFileBrowserSkin.java
> Steps to reproduce:
> # Create a Pivot application that opens a FileBrowserSheet using a button.
> # Map about 6 network drives or connect external hard drives to drive letters
> on a machine running windows
> # Wait enough time for the power-management "spin down" on some or all of the
> mapped or connected drives
> # Run the Pivot application and click the button that opens the
> FileBrowserSheet
> # *Nothing appears to be happening for several seconds* (far too long) while
> the JVM collects the results of File.listRoots() to populate the
> "driveListButton" listData.
> # Finally after several seconds, the FileBrowserSheet appears.
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