The user should be provided with a way to select a
subset of the images that are listed in PicL and rename
just those selected files.
A possible solution would be to provide a checkbox for
each listed item which would indicate whether or not to
apply the replace string to the image. Clicking the
'Rename' button might still rename all of the listed
files, but the replace strings could be formed
differently for each subset.
Some work may be needed to allow the individual items
in the list to 'remember' their replace string.
Selecting any item in the list should result in the
Replace String being changed to reflect the last string
that was applied to the selected item. Otherwise,
10/100 images could be renamed according to one replace
string, the other 90 with another, and when the user
selects one of the first 10 items thereafter, the
replace string from the second subset (of 90 images)
would be applied ... overwriting the initial replace
string.
Either that or the image name could be left alone
unless the replace string is actually modified. The
only downside to this is that the user might have a
file selected which has it's name formed based on the
repace string '%M%d-%c.jpg' but the current replace
string is 'Vacation-%c.jpg', which could be confusing.
