- Added `AreasContext` export and created `useAreasContext` custom hook for safer and easier context access.
- Integrated `PropTypes` to validate `children` prop in `AreasContextProvider` component.
- Refactored `addArea` function by breaking it into `addExistingArea` and `addNewArea` for improved readability and maintainability.
- Added error handling in `deleteArea` function to prevent operations with invalid IDs.
- Extracted logic to clear selected element into a separate function for better separation of concerns.
- Ensured proper default export for `AreasContextProvider` to facilitate correct imports.
These changes improve code robustness, readability, and type safety in the JavaScript environment.
After some initial smaller fixes, it turned out that I had broken
the red line used when linking fields. Fixing this was not trivial
as I found myself battling a lot of small bugs relating to scale
and translation in the existing code. This was made extra difficult
as a lot of coordinates were calculated when necessary in
Canvas.jsx.
This commit attempts to simplify the coordinate management in a few
different ways:
* There are now two distinct coordinate systems in use, typically
referred to as "spaces". Screen space and diagram space.
* Diagram space is no longer measured in pixels (though the
dimension-less measure used instead still maps to pixels at 100%
zoom).
* The canvas now exposes helper methods for transforming between
spaces.
* Zoom and translation is now managed via the svg viewBox property.
* This makes moving items in diagram space much easier as the
coordinates remain constant regardless of zoom level.
* The canvas now wraps the current mouse position in a context
object, making mouse movement much easier to work with.
* The transform.pan property now refers to the center of the screen.
A new feature in this commit is that scroll wheel zoom is now based
on the current cursor location, making the diagram more convenient
to move around in.
I have tried to focus on Canvas.jsx and avoid changes that might be
desctructive on existing save files. I also believe more refactors
and abstractions could be introduced based on these changes to make
the diagram even easier to work with. However, I deem that out of
scope for now.
