Fix: Make polygon hexagon drawable via drag

[bhavjsh]

Problem

Hexagon (polygon) drawing required point-by-point taps, unlike other shapes
(circle, rectangle) which support click-and-drag drawing.

Solution

Updated paint canvas gesture handling so hexagon follows the same
click-and-drag behavior as other shape tools.

Result

• Consistent UX across all shape tools
• Hexagon now draws smoothly via drag gesture

Demo

Screen recording showing hexagon drag behavior:

Screen.Recording.2026-01-19.000455.mp4

[hm21]

Thanks for creating that PR.

The issue is that we're actually working with polygons, which have a minimum of 3 sides and are meant to be dynamic based on the user input. In your code, I see you've added a Hexagon, which has exactly 6 sides. Unfortunately, I can't merge the PR since that would prevent users from drawing dynamic polygons, which was actually a previous feature request.

However, would it be helpful for you to support specific shapes like Hexagon, Pentagon, Heptagon, etc.? If so, technically you just need to create a new path_builder, similar to how it's done for the circle. Let me know if you're interested in doing that and I can explain it in more detail and help implement that.

Just a quick note (not a criticism, more of a suggestion): I assume the code was "Vibe-Coded" which is completly fine, but I’d appreciate it if commits only included changes relevant to the improvement. For example, a lot existing doc comments were removed and random comments like ✅ NOT const were added. During review, that creates a lot of noise and extra review commits to undo unrelated changes. Renaming things like widget.paintCtrl to _paintCtrl is totally fine, though. I’d just prefer style or doc updates to be in a separate PR. Again, not a complaint, just a tip to help make the review process smoother.

Thanks again for raising that PR, your idea to add hexagons like that is really cool :)

[bhavjsh]

You're right overloading the polygon tool with a fixed 6-sided shape isn't ideal.
I like the idea of supporting explicit shapes (hexagon, pentagon, etc.) via a dedicated path_builder similar to circle.

I’d be very interested in implementing this properly following the existing architecture.
If you could point me to the relevant path_builder or files to extend, I’d be happy to work on a new PR with a cleaner, focused change.

Also noted the feedback about keeping PRs scoped , will keep improvements isolated going forward.
Thanks for the guidance!

[hm21]

Awesome! I'd love to hear that you want to implement it. As a quick guide:

1. Add a new path_builder to the this folder. For example path_builder_hexagon.dart
2. Add every new path you created here.
3. Create a new "PaintMode" here.
4. Add a new translation for that mode here.
5. Add a new icon here.
6. Add the new content here.