Inconsistent range selection behavior (Shift+Click) in Bookmark and Thumbnails panes

[rakunavi]

Hello all,

I have noticed some unexpected behavior when selecting a range of items using Shift+Click in the Bookmark and Thumbnails panes. It seems that the "starting point" for a range selection is not always updated to the currently selected item as expected.

I am using a sample PDF with 15 pages, where each page has a corresponding bookmark.

• sample.pdf

Case 1: Range selection after duplicating bookmarks

1. Click on bookmark "Page 6".
2. Shift+Click on bookmark "Page 9". As expected, four bookmarks (Page 6 to 9) are selected.
3. Press Ctrl+C then Ctrl+V to duplicate them. The four new bookmarks are now selected (as shown in Figure A).
4. Shift+Click on bookmark "Page 13".
   • Expected: A range from the newly duplicated items to Page 13 should be selected (Figure B).
   • Actual: The selection expands from the original Page 6 (the starting point of Step 1) all the way to Page 13, resulting in 12 items being selected (Figure C).

• figure1.png
  
  
  Animation1.gif
  The capture software used (ScreenToGif) displays a yellow circle around the mouse cursor when the left mouse button is clicked
  and a red circle when the right mouse button is clicked, so you can tell which mouse button was clicked just by looking at the screen.

Case 2: Range selection after changing the current page and right-clicking

1. Click on bookmark "Page 6".
2. Scroll the page view to Page 1. The "current page" indicator (pale yellow highlight) moves to Page 1.
3. Right-click on bookmark "Page 10".
4. Click on an empty area of the toolbar to dismiss the context menu. Bookmark "Page 10" is now the only item selected (Figure A).
5. Shift+Click on bookmark "Page 13".
   • Expected: Items from Page 10 to Page 13 should be selected (Figure B).
   • Actual: The selection starts from Page 6 (the previous selection before the right-click) and extends to Page 13, selecting 8 items in total (Figure C).

• figure2.png
  
  
  Animation2.gif

Although the steps above describe the Bookmark pane, I have confirmed that the exact same behavior occurs in the Thumbnails pane. It appears that the "anchor" for Shift+Click selection is not being reset correctly when items are duplicated or selected via right-click.

Case 1 in the Thumbnails Pane

• figure3.png
  
  
  Animation3.gif

Case 2 in the Thumbnails Pane

• figure4.png
  
  
  Animation4.gif

Hoping that the above information will be of some help to you.
Thank you so much for your continued support.

Best regards,
rakunavi

- PDF-XChange Editor PRO Version: 10.8.2 build 407
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[Sean - PDF-XChange]

Hi Rakunavi - I have let the team know.

Many thanks,