Graphical tool to measure distance in pixels in image

[vallsv]

Feedback from Flint users.

They would like to have a tool to measure distance in pixels in images.

Such tool is very generic and probably have to deal with internal plot modes to make it work, so i open an issue here.

This is not a priority, but could be useful sometime.

[t20100]

Distance info could be added to the line profile tool or as a separated tool with an interaction mode and a toolbutton to add to the toolbar.
What do you need for flint?

Since the profile tool is not a mode, I would go for a dedicated tool/mode.

[vallsv]

I dont think it's a good idea to talk about profile here.

Maybe it could have featured based on a ROI.

But it also could be implemented as a mouse interaction, and only be displayed during the mouse interaction.
I prefer this last solution.

[vallsv]

I don't need the solution using a ROI, cause i can implement it in flint without problem.

[payno]

For information I just have the same need for an application

[payno]

Indeed I started a prototype here: #3959

But according to the different use cases:

• handling image scales
• numerical precision to be displayed
• displaying or not the start and end points...
  I wonder if it is worth to be added to silx or not ?

[payno]

API given by: #3959