Suggestions for image browser's user interface: transformation being edited, file in batch list, and breakpoints

[pierrelabreche]

Considering that

• Highlighting a transformation using an outline is very efficient for bringing user attention. This is currently used by PWP to show breakpoints
• In software debuggers and interpreters, a breakpoint is generally represented as a red dot next to an instruction
• In software debuggers and interpreters, the next instruction is generally represented using a left-to-right arrow pointing to the current instruction
• A red dot is already used in PWP to show the current file being processed for multiple file input.
• PWP shows the currect transformation being processed using cyan shading of the transformation thumbnail's title.

It would seem more intuitive (at least for me) to use

• in a list of files for batch processing, a left-to-right arrow indicate the next file
• in the image browser, a red dot shows that a transformation has a breakpoint
• in the image browser, an outline highlights the transformation being edited
• in the image browser, a left-to-right arrow indicate the transformation being processed or halted in a breakpoint