View Issue Details

IDProjectCategoryView StatusLast Update
0006186JEDI VCL00 JVCL Componentspublic2014-12-04 16:30
ReporterthijsvandienAssigned Toobones 
Status resolvedResolutionsuspended 
Product VersionDaily / GIT 
Target VersionFixed in Version 
Summary0006186: JvDriveCombo shows inconsistent behavior when drives disappear
DescriptionWhen selecting a drive from the JvDriveCombo, the properties ItemIndex and Drive are updated and the display is updated. Now, if the drive goes away (unmounted) the following happens:

- If there is a drive letter higher than that of drive that was removed, that drive is displayed.
- Otherwise no drive is displayed.

In both cases FItemIndex and Drive are not updated and still represent the situation as it was before the drive was removed.

When the removed drive comes back (mounted again), it is displayed again as the selected drive.

First of all, the behavior is a bit inconsistent. Either there should always be displayed a next best drive (so the next, or if there is none, the previous, or if there is none, no drive), or the display should always be cleared, if the selected drive is removed.

Second of all, I think the meaning of Drive should be better defined. Is JvDriveCombo supposed to remember removed drives and restore the selection upon return? I think it's rather confusing that Drive can return a completely different drive letter than that of the drive currently displayed.

For example, have a single system partition (C:) and plug in a flash drive (E:). Select the flash drive and then unplug it. The next displayed drive will be either some CD/DVD drive (D:) or the system partition (C:). However, the Drive property still returns 'E' and if the flash drive is plugged in again, it becomes the active item.

If JvDriveCombo is supposed to remember, I think Drive should be renamed DesiredDrive/PreferredDrive or something. And if not, Drive should always be updated along with the display.
TagsNo tags attached.



2013-08-18 23:37

reporter   ~0020584

Correction; in my example, it will show no drive after removing the flash drive, but it will still return 'E' as Drive. Plug in two flash drives (E: and F:) and remove the first (E:). Then F: will be displayed, whereas Drive will give back 'E'. Of course, instead of flash drives, one may use network drives.


2013-12-13 10:59

administrator   ~0020736

Please try with the latest JVCL version in GIT (or daily zip) and then send us a zipped file containing the sources of an application showing the issue.


2014-12-04 16:30

administrator   ~0021106

No news, suspending the issue

Issue History

Date Modified Username Field Change
2013-08-18 20:00 thijsvandien New Issue
2013-08-18 23:37 thijsvandien Note Added: 0020584
2013-12-13 10:59 obones Note Added: 0020736
2013-12-13 10:59 obones Status new => feedback
2014-12-04 16:30 obones Note Added: 0021106
2014-12-04 16:30 obones Status feedback => resolved
2014-12-04 16:30 obones Resolution open => suspended
2014-12-04 16:30 obones Assigned To => obones