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Diffstat (limited to 'circuitpython/shared-bindings/keypad/EventQueue.c')
-rw-r--r-- | circuitpython/shared-bindings/keypad/EventQueue.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/circuitpython/shared-bindings/keypad/EventQueue.c b/circuitpython/shared-bindings/keypad/EventQueue.c new file mode 100644 index 0000000..8e45f7a --- /dev/null +++ b/circuitpython/shared-bindings/keypad/EventQueue.c @@ -0,0 +1,152 @@ +/* + * This file is part of the Micro Python project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2021 Dan Halbert for Adafruit Industries + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include "py/objproperty.h" +#include "py/runtime.h" +#include "shared-bindings/keypad/Event.h" +#include "shared-bindings/keypad/EventQueue.h" + +//| class EventQueue: +//| """A queue of `Event` objects, filled by a `keypad` scanner such as `Keys` or `KeyMatrix`. +//| +//| You cannot create an instance of `EventQueue` directly. Each scanner creates an +//| instance when it is created. +//| """ +//| ... + +//| def get(self) -> Optional[Event]: +//| """Return the next key transition event. Return ``None`` if no events are pending. +//| +//| Note that the queue size is limited; see ``max_events`` in the constructor of +//| a scanner such as `Keys` or `KeyMatrix`. +//| If a new event arrives when the queue is full, the event is discarded, and +//| `overflowed` is set to ``True``. +//| +//| :return: The next queued key transition `Event`. +//| :rtype: Optional[Event] +//| """ +//| ... +//| +STATIC mp_obj_t keypad_eventqueue_get(mp_obj_t self_in) { + keypad_eventqueue_obj_t *self = MP_OBJ_TO_PTR(self_in); + + return common_hal_keypad_eventqueue_get(self); +} +MP_DEFINE_CONST_FUN_OBJ_1(keypad_eventqueue_get_obj, keypad_eventqueue_get); + +//| def get_into(self, event: Event) -> bool: +//| """Store the next key transition event in the supplied event, if available, +//| and return ``True``. +//| If there are no queued events, do not touch ``event`` and return ``False``. +//| +//| The advantage of this method over ``get()`` is that it does not allocate storage. +//| Instead you can reuse an existing ``Event`` object. +//| +//| Note that the queue size is limited; see ``max_events`` in the constructor of +//| a scanner such as `Keys` or `KeyMatrix`. +//| +//| :return: ``True`` if an event was available and stored, ``False`` if not. +//| :rtype: bool +//| """ +//| ... +//| +STATIC mp_obj_t keypad_eventqueue_get_into(mp_obj_t self_in, mp_obj_t event_in) { + keypad_eventqueue_obj_t *self = MP_OBJ_TO_PTR(self_in); + + keypad_event_obj_t *event = MP_OBJ_TO_PTR(mp_arg_validate_type(event_in, &keypad_event_type, MP_QSTR_event)); + + return mp_obj_new_bool(common_hal_keypad_eventqueue_get_into(self, event)); +} +MP_DEFINE_CONST_FUN_OBJ_2(keypad_eventqueue_get_into_obj, keypad_eventqueue_get_into); + +//| def clear(self) -> None: +//| """Clear any queued key transition events. Also sets `overflowed` to ``False``. +//| """ +//| ... +//| +STATIC mp_obj_t keypad_eventqueue_clear(mp_obj_t self_in) { + keypad_eventqueue_obj_t *self = MP_OBJ_TO_PTR(self_in); + + common_hal_keypad_eventqueue_clear(self); + return MP_ROM_NONE; +} +MP_DEFINE_CONST_FUN_OBJ_1(keypad_eventqueue_clear_obj, keypad_eventqueue_clear); + +//| def __bool__(self) -> bool: +//| """``True`` if `len()` is greater than zero. +//| This is an easy way to check if the queue is empty. +//| """ +//| ... +//| +//| def __len__(self) -> int: +//| """Return the number of events currently in the queue. Used to implement ``len()``.""" +//| ... +//| +STATIC mp_obj_t keypad_eventqueue_unary_op(mp_unary_op_t op, mp_obj_t self_in) { + keypad_eventqueue_obj_t *self = MP_OBJ_TO_PTR(self_in); + uint16_t len = common_hal_keypad_eventqueue_get_length(self); + switch (op) { + case MP_UNARY_OP_BOOL: + return mp_obj_new_bool(len != 0); + case MP_UNARY_OP_LEN: + return MP_OBJ_NEW_SMALL_INT(len); + default: + return MP_OBJ_NULL; // op not supported + } +} + +//| overflowed: bool +//| """``True`` if an event could not be added to the event queue because it was full. (read-only) +//| Set to ``False`` by `clear()`. +//| """ +//| +STATIC mp_obj_t keypad_eventqueue_get_overflowed(mp_obj_t self_in) { + keypad_eventqueue_obj_t *self = MP_OBJ_TO_PTR(self_in); + return mp_obj_new_bool(common_hal_keypad_eventqueue_get_overflowed(self)); +} +MP_DEFINE_CONST_FUN_OBJ_1(keypad_eventqueue_get_overflowed_obj, keypad_eventqueue_get_overflowed); + +MP_PROPERTY_GETTER(keypad_eventqueue_overflowed_obj, + (mp_obj_t)&keypad_eventqueue_get_overflowed_obj); + +STATIC const mp_rom_map_elem_t keypad_eventqueue_locals_dict_table[] = { + { MP_ROM_QSTR(MP_QSTR_clear), MP_ROM_PTR(&keypad_eventqueue_clear_obj) }, + { MP_ROM_QSTR(MP_QSTR_get), MP_ROM_PTR(&keypad_eventqueue_get_obj) }, + { MP_ROM_QSTR(MP_QSTR_get_into), MP_ROM_PTR(&keypad_eventqueue_get_into_obj) }, + { MP_ROM_QSTR(MP_QSTR_overflowed), MP_ROM_PTR(&keypad_eventqueue_overflowed_obj) }, +}; + +STATIC MP_DEFINE_CONST_DICT(keypad_eventqueue_locals_dict, keypad_eventqueue_locals_dict_table); + +const mp_obj_type_t keypad_eventqueue_type = { + { &mp_type_type }, + .flags = MP_TYPE_FLAG_EXTENDED, + .name = MP_QSTR_EventQueue, + MP_TYPE_EXTENDED_FIELDS( + .unary_op = keypad_eventqueue_unary_op, + ), + .locals_dict = (mp_obj_t)&keypad_eventqueue_locals_dict, +}; |