I want a brain image with regions that glow on hover and open related directories or programs when clicked. I know some basic C#, JavaScript, and Python. Could this be done with widgets, or would I need to build a shell and learn a lot of Bash?
How could I make a clickable brain map for my Ubuntu desktop?
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You don't need to build a shell for this. Start with a normal desktop and make the brain map a separate application. A JavaScript interface with an SVG brain would be a reasonable fit: give each region its own clickable shape, use a hover style for the glow, and connect clicks to actions.
Opening a directory or launching a program needs integration with the desktop, so check what your chosen application framework allows. Bash is optional here. JavaScript, SVG, and a little CSS are more directly useful for the visual part.
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KDE Plasma is worth exploring if you want the map to feel more like part of the desktop. A custom background and desktop widgets could get you partway there, though matching irregular clickable brain regions and hover effects may still require a custom widget. Expect a mostly 2D result.
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Keep the first version small: draw two regions, make the hover effect work, then have one click open a directory and the other launch a program. That should tell you which parts of the toolset you need before you spend time mapping the whole brain.
If you're trying a different desktop environment or making major configuration changes, a virtual machine is a handy place to experiment. Back up your files first and understand any commands you run.
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almost+underlined_6:
A rotating 3D brain could be a fun later project, but a flat map sounds much easier to get working first.