Grid demo

Carry the box to another square. Or focus it, press Space or Enter, use arrows to move, and press Space or Enter again to drop. Shift+arrows moves four squares; Escape restores the starting position.

Move me

Column 1, row 1

The demo keeps the box inside the surface. The engine reports the gesture; the example clamps coordinates, draws with a transform and commits on drop. This boundary behavior belongs to the app, not the engine.

Read the grid API for surfaces, toolbar sources and keyboard gestures.