21.0.0

- `tcod.sdl.video.Window` now accepts an SDL WindowID.
- `tcod.event`:
  - `MouseState.integer_position` and `MouseMotion.integer_motion` to handle cases where integer values are preferred.
  - `ClipboardUpdate` event.
  - `Drop` event.
  - `KeyboardEvent.pressed`, `KeyboardEvent.which`, `KeyboardEvent.window_id` attributes.
  - `WindowEvent.data` and `WindowEvent.window_id` attributes and added missing SDL3 window events.
  - `which` and `window_id` attributes for mouse events.
  - Events now have `Event.timestamp` and `Event.timestamp_ns` which use SDL's timer at `tcod.event.time` and `tcod.event.time_ns`.

- Event classes are now more strict with attribute types
- Event class initializers are keyword-only and no longer take a type parameter, with exceptions.
  Generally event class initialization is an internal process.
- `MouseButtonEvent` no longer a subclass of `MouseState`.
- `tcod.event.Point` is now a generic type containing `int` or `float` values depending on the context.
- When converting mouse events to tiles:
  `MouseState.position` and `MouseMotion.motion` refers to sub-tile coordinates.
  `MouseState.integer_position` and `MouseMotion.integer_motion` refers to integer tile coordinates.

- `Event.type` is deprecated except for special cases such as `ControllerDevice`, `WindowEvent`, etc.
- `MouseButtonEvent.state` is deprecated, replaced by the existing `.button` attribute.

- Fixed incorrect C FFI types inside `tcod.event.get_mouse_state`.
- Fixed regression in mouse event tile coordinates being `float` instead of `int`.
  `convert_coordinates_from_window` can be used if sub-tile coordinates were desired.
- Fixed regression in `libtcodpy.bsp_split_recursive` not accepting `0`.

20.1.0

- `Tileset` now supports `MutableMapping` semantics.
  Can get, set, or iterate over tiles as if it were a dictionary containing tile glyph arrays.
  Also supports `+`, `|`, `+=`, and `|=` with other tilesets or mappings to merge them into a single Tileset.
- `tcod.tileset.procedural_block_elements` can take a tile shape and return a tileset.

- `Tileset.set_tile(codepoint, tile)` was replaced with `tileset[codepoint] = tile` syntax.
- `Tileset.get_tile(codepoint)` was soft replaced with `tileset[codepoint]` syntax.
- `tcod.tileset.procedural_block_elements` should be used with dictionary semantics instead of passing in a tileset.

20.0.0

- Now supports free-threaded Python, deploys with `cp314t` wheels.
- Added methods: `Renderer.coordinates_from_window` and `Renderer.coordinates_to_window`
- Added `tcod.event.convert_coordinates_from_window`.

- `Renderer.logical_size` now returns `None` instead of `(0, 0)` when logical size is unset.

19.6.3

Fix missing deployment

19.6.2

- Update to libtcod 2.2.2

- Mouse coordinate to tile conversions now support SDL renderer logical size and scaling.

19.6.1

- `tcod.event.add_watch` was crashing due to a cdef type mismatch.

19.6.0

- Alternative syntax for number symbols with `KeySym`, can now specify `KeySym["3"]`, etc.
  Only available on Python 3.13 or later.

- Fixed regression with lowercase key symbols with `tcod.event.K_*` and `KeySym.*` constants, these are still deprecated.
  Event constants are only fixed for `tcod.event.K_*`, not the undocumented `tcod.event_constants` module.
  Lowercase `KeySym.*` constants are only available on Python 3.13 or later.
- `BSP.split_recursive` did not accept a `Random` class as the seed. #168

19.5.0

- Update to libtcod 2.2.1.
- Scaling defaults to nearest, set `os.environ["SDL_RENDER_SCALE_QUALITY"] = "linear"` if linear scaling was preferred.

- `SDL_RENDER_SCALE_QUALITY` is now respected again since the change to SDL3.
- Fixed crash on controller events.

19.4.1

- Fixed dangling pointer in `Pathfinder.clear` method.
- Fixed hang in `Pathfinder.rebuild_frontier` method.

19.4.0

- Checking "WindowSizeChanged" was not valid since SDL 3 and was also not valid in previous examples.
  You must no longer check the type of the `WindowResized` event.

- Corrected some inconsistent angle brackets in the `__str__` of Event subclasses. #165
- Fix regression with window events causing them to be `Unknown` and uncheckable.