Image browser suggestion : selecting transformations for copy-paste-delete using the mouse

[pierrelabreche]

Allow user to draw an enclosing box around transformations for selecting them, with visual feedback.

Then :
- Drag the mouse to move the set ; in conjunction with holding down a keyboard key, drag to move the set.
- Enable the usual keyboard shortcuts for copying (Cntrl-c), Pasting (Cntrl-v), and Deleting (Cntrl-x) .

[jsachs]

Currently Ctrl-C/X/V are used to copy cut and paste withing edit controls. Every time I have tried to use them for something else as well, it has stopped working in edit controls. While there may be a way to do this, I have never found it.

Moving transformations around via a clipboard has a lot of problems related to resolving references to transformations not on the clipboard or in a different image tree altogether. The select and copy method avoids these issues.

Snippets pretty much work like a named clipboard, but they are not a general solution to the problem as they are subject to limitations regarding references to other transformations.