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Merged
SukuWc merged 1 commit into from
May 5, 2026
Merged

Add touch element type and protocol definitions #358

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98 changes: 98 additions & 0 deletions common/src/c/grid_ui_touch.c
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#include "grid_ui_touch.h"

#include <stdbool.h>
#include <stdlib.h>
#include <string.h>

#include "grid_lua_api.h"
#include "grid_math.h"
#include "grid_platform.h"
#include "grid_ui_system.h"

const luaL_Reg GRID_LUA_T_INDEX_META[] = {{GRID_LUA_FNC_T_ELEMENT_INDEX_short, XAFTERX(GRID_LUA_FNC_GTV_NAME, GRID_LUA_FNC_T_ELEMENT_INDEX_index)},
{GRID_LUA_FNC_T_LED_INDEX_short, XAFTERX(GRID_LUA_FNC_GTV_NAME, GRID_LUA_FNC_T_LED_INDEX_index)},
{GRID_LUA_FNC_T_TOUCH_X_short, XAFTERX(GRID_LUA_FNC_GTV_NAME, GRID_LUA_FNC_T_TOUCH_X_index)},
{GRID_LUA_FNC_T_TOUCH_Y_short, XAFTERX(GRID_LUA_FNC_GTV_NAME, GRID_LUA_FNC_T_TOUCH_Y_index)},
{GRID_LUA_FNC_T_TOUCH_AREA_short, XAFTERX(GRID_LUA_FNC_GTV_NAME, GRID_LUA_FNC_T_TOUCH_AREA_index)},
{GRID_LUA_FNC_T_TOUCH_X_MIN_short, XAFTERX(GRID_LUA_FNC_GTV_NAME, GRID_LUA_FNC_T_TOUCH_X_MIN_index)},
{GRID_LUA_FNC_T_TOUCH_X_MAX_short, XAFTERX(GRID_LUA_FNC_GTV_NAME, GRID_LUA_FNC_T_TOUCH_X_MAX_index)},
{GRID_LUA_FNC_T_TOUCH_Y_MIN_short, XAFTERX(GRID_LUA_FNC_GTV_NAME, GRID_LUA_FNC_T_TOUCH_Y_MIN_index)},
{GRID_LUA_FNC_T_TOUCH_Y_MAX_short, XAFTERX(GRID_LUA_FNC_GTV_NAME, GRID_LUA_FNC_T_TOUCH_Y_MAX_index)},
{GRID_LUA_FNC_G_TIMER_START_short, XAFTERX(GRID_LUA_FNC_META_NAME, gtt)},
{GRID_LUA_FNC_G_TIMER_STOP_short, XAFTERX(GRID_LUA_FNC_META_NAME, gtp)},
{GRID_LUA_FNC_G_EVENT_TRIGGER_short, XAFTERX(GRID_LUA_FNC_META_NAME, get)},
{GRID_LUA_FNC_G_ELEMENTNAME_SET_short, XAFTERX(GRID_LUA_FNC_META_NAME, gsen)},
{GRID_LUA_FNC_G_ELEMENTNAME_GET_short, XAFTERX(GRID_LUA_FNC_META_NAME, ggen)},
{NULL, NULL}};

void grid_ui_element_touch_init(struct grid_ui_element* ele) {

ele->type = GRID_PARAMETER_ELEMENT_TOUCH;

ele->primary_state = grid_platform_allocate_volatile(sizeof(struct grid_ui_touch_state));
memset(ele->primary_state, 0, sizeof(struct grid_ui_touch_state));
((struct grid_ui_touch_state*)ele->primary_state)->parent = ele;

grid_ui_element_malloc_events(ele, 3);
grid_ui_event_init(ele, 0, GRID_PARAMETER_EVENT_INIT, GRID_LUA_FNC_A_INIT_short, GRID_ACTIONSTRING_TOUCH_INIT);
grid_ui_event_init(ele, 1, GRID_PARAMETER_EVENT_TOUCH, GRID_LUA_FNC_A_TOUCH_short, GRID_ACTIONSTRING_TOUCH_TOUCH);
grid_ui_event_init(ele, 2, GRID_PARAMETER_EVENT_TIMER, GRID_LUA_FNC_A_TIMER_short, GRID_ACTIONSTRING_SYSTEM_TIMER);

ele->template_initializer = &grid_ui_element_touch_template_parameter_init;
ele->template_parameter_list_length = GRID_LUA_FNC_T_LIST_length;

ele->event_clear_cb = NULL;
ele->page_change_cb = NULL;
}

void grid_ui_element_touch_template_parameter_init(struct grid_ui_template_buffer* buf) {

uint8_t element_index = buf->parent->index;
int32_t* template_parameter_list = buf->template_parameter_list;

template_parameter_list[GRID_LUA_FNC_T_ELEMENT_INDEX_index] = element_index;
template_parameter_list[GRID_LUA_FNC_T_LED_INDEX_index] = element_index;
template_parameter_list[GRID_LUA_FNC_T_TOUCH_X_index] = 0;
template_parameter_list[GRID_LUA_FNC_T_TOUCH_Y_index] = 0;
template_parameter_list[GRID_LUA_FNC_T_TOUCH_AREA_index] = 0;
template_parameter_list[GRID_LUA_FNC_T_TOUCH_X_MIN_index] = 0;
template_parameter_list[GRID_LUA_FNC_T_TOUCH_X_MAX_index] = 127;
template_parameter_list[GRID_LUA_FNC_T_TOUCH_Y_MIN_index] = 0;
template_parameter_list[GRID_LUA_FNC_T_TOUCH_Y_MAX_index] = 127;
}

static int32_t touch_scale(uint16_t raw, int32_t out_min, int32_t out_max) {
int32_t scaled = out_min + ((int64_t)raw * (out_max - out_min)) / 1023;
return clampi32(scaled, MIN(out_min, out_max), MAX(out_min, out_max));
}

void grid_ui_touch_store_input(struct grid_ui_touch_state* state, uint16_t x, uint16_t y, uint8_t area) {

struct grid_ui_element* ele = state->parent;
int32_t* tpl = ele->template_parameter_list;

state->x = x;
state->y = y;
state->area = area;

x = 1023 - x;

int32_t x_min = tpl[GRID_LUA_FNC_T_TOUCH_X_MIN_index];
int32_t x_max = tpl[GRID_LUA_FNC_T_TOUCH_X_MAX_index];
int32_t y_min = tpl[GRID_LUA_FNC_T_TOUCH_Y_MIN_index];
int32_t y_max = tpl[GRID_LUA_FNC_T_TOUCH_Y_MAX_index];

int32_t new_x = touch_scale(x, x_min, x_max);
int32_t new_y = touch_scale(y, y_min, y_max);

bool changed = (new_x != tpl[GRID_LUA_FNC_T_TOUCH_X_index]) || (new_y != tpl[GRID_LUA_FNC_T_TOUCH_Y_index]);

tpl[GRID_LUA_FNC_T_TOUCH_X_index] = new_x;
tpl[GRID_LUA_FNC_T_TOUCH_Y_index] = new_y;
tpl[GRID_LUA_FNC_T_TOUCH_AREA_index] = area;

if (changed) {
struct grid_ui_event* eve = grid_ui_event_find(ele, GRID_PARAMETER_EVENT_TOUCH);
grid_ui_event_state_set(eve, GRID_EVE_STATE_TRIG);
}
}
40 changes: 40 additions & 0 deletions common/src/c/grid_ui_touch.h
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#ifndef GRID_UI_TOUCH_H
#define GRID_UI_TOUCH_H

#include <stdint.h>

#include "grid_protocol.h"
#include "grid_ui.h"

struct grid_ui_touch_state {
struct grid_ui_element* parent;
uint16_t x;
uint16_t y;
uint8_t area; // 0 = not pressed
};

void grid_ui_element_touch_init(struct grid_ui_element* ele);
void grid_ui_element_touch_template_parameter_init(struct grid_ui_template_buffer* buf);

static inline struct grid_ui_touch_state* grid_ui_touch_get_state(struct grid_ui_element* ele) { return (struct grid_ui_touch_state*)ele->primary_state; }

void grid_ui_touch_store_input(struct grid_ui_touch_state* state, uint16_t x, uint16_t y, uint8_t area);

#define GRID_LUA_T_TYPE "Touch"

extern const luaL_Reg GRID_LUA_T_INDEX_META[];

#define GRID_LUA_T_META_init \
GRID_LUA_T_TYPE " = { __index = {" \
"type = 'touch', " \
"post_init_cb = function (self) " \
"self:" GRID_LUA_FNC_A_INIT_short "() " \
"self:" GRID_LUA_FNC_A_TOUCH_short "() " \
"end," GRID_LUA_FNC_ASSIGN_META_PAR1_RET("gen", GRID_LUA_FNC_G_ELEMENTNAME_short) "," \
"}}"

#define GRID_ACTIONSTRING_TOUCH_INIT "--[[@cb]]--[[Touch Init]]"

#define GRID_ACTIONSTRING_TOUCH_TOUCH "--[[@cb]]print(self:ind(),self:tsx(),self:tsy(),self:tar())"

#endif /* GRID_UI_TOUCH_H */
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