fix: 2022 - no fling beyond the antimeridian if constrained

[monsieurtanuki]

What

Fix in 2 parts:

• during a fling, if at one step we cannot move, we stop immediately the rest of the fling animation
• when we apply the LatLngBounds constraint, we now take into consideration the specific -180,180 "constraint". Of course the longitude will always be between -180,180, so we need an extra test to check if we got beyond the limits.
• Fixes: Map warps to other side of the planet when map center hits antimeridian #2022

Files

New file:

• antimeridian.dart: Testing if we can fling beyond the world. We can't, due to the constraint.

Impacted files:

• camera_constraint.dart: special case when the constraint is the world
• main.dart: added new AntimeridianPage page.
• map_interactive_viewer.dart: stop fling when the moveRaw fails
• menu_drawer.dart: added new AntimeridianPage page.

[JaffaKetchup]

Hey @monsieurtanuki, I can't seem to actually fling at all now? (Testing on Windows with a mouse)

[monsieurtanuki]

@JaffaKetchup I'll double-check that tomorrow.

[monsieurtanuki]

Hey @monsieurtanuki, I can't seem to actually fling at all now? (Testing on Windows with a mouse)

@JaffaKetchup Quickly said: you're right :(