Add Description Editing to Image View

[mfritzler]

Description Editing Enhancement Request
Use Case: On vacation, you take a guided tour of Strasbourg, the town and the magnificent cathedral.
Once home, In he Image view you want to:
1. Crop
2. De-skew, and
3. Add captions to the metadata of your photos, so you can later display them on a digital picture frame, or with some other software that will show XMP Description.

With Xnview MP, you can do 1 and 2 very easily, but to do 3 you have

a) Press Ctrl-M to call the Edit XMP dialog that has 7 tabs.
b) Then in the Description tab, in the Description field, enter a caption, say “Test 1” and click the Write Button
c) Close the dialog by pressing the Cancel button or the X icon in the upper right

Here is the enhancement request. Enable editing XMP:Description or IPTC:caption on the Image view. This would make for a much smoother workflow.

We can already display labels in the image view, but they appear in the upper left, overlaying the photo. So:

A. Move the display of the labels fields to the bottom center of the photo, slightly shrinking the preview so the labels fields do not overlap the photo. In Qt 5 this would be done, I think, by adding a horizontal box element to the Image layout

B. Make the label fields editable.

Several available label fields are editable elsewhere in the application, like XMP:Description, Title, and Keywords. So code to write to them already exists. I suggest adding events to editable label fields in the Image view that call that existing code.

Actually, all I really want is the display of an editable XMP:Description field, but if you are doing it for that, perhaps it is not too much work to do it for the other editable label fields.

I realize this is not a small request. I have a very rough proof-of-concept program written in Python and Pyside6 the demonstrates the functionality, and it took a good while to get it to sort-of work. I doubt that code would be useful, but you are welcome to it if you want to look.