123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169 |
- /*
- * state_value.c
- *
- * Copyright (c) 2023 Thomas Buck (thomas@xythobuz.de)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * See <http://www.gnu.org/licenses/>.
- */
-
- #include <stdio.h>
-
- #include "config.h"
- #include "buttons.h"
- #include "log.h"
- #include "lcd.h"
- #include "text.h"
- #include "state_value.h"
-
- static void *val_p = NULL;
- static size_t val_len = 0;
- static ssize_t val_min = 0;
- static ssize_t val_max = 0;
- static ssize_t val_step = 0;
-
- static enum value_step_mode val_mode = VAL_STEP_INCREMENT;
- static enum system_state val_ret_state = STATE_SCAN;
-
- static ssize_t val = 0;
-
- void state_value_set(void *value, size_t length,
- ssize_t min, ssize_t max,
- enum value_step_mode mode, ssize_t step) {
- val_p = value;
- val_len = length;
- val_min = min;
- val_max = max;
- val_mode = mode;
- val_step = step;
- }
-
- void state_value_return(enum system_state state) {
- val_ret_state = state;
- }
-
- static void draw(void) {
- static char buff[100];
- static size_t pos = 0;
-
- if ((val_p == NULL) || (val_len <= 0)) {
- pos += snprintf(buff, sizeof(buff),
- "error");
- } else {
- pos += snprintf(buff, sizeof(buff),
- "%d", val);
- }
-
- text_box(buff, false,
- "fixed_10x20",
- 0, LCD_WIDTH,
- 50, TEXT_BOX_HEIGHT(20, 2),
- 0);
- }
-
- static void write(void) {
- if ((val_p == NULL) || (val_len <= 0)) {
- debug("invalid params");
- return;
- }
-
- switch (val_len) {
- case 1:
- *((uint8_t *)val_p) = val;
- break;
-
- case 2:
- *((uint16_t *)val_p) = val;
- break;
-
- case 4:
- *((uint32_t *)val_p) = val;
- break;
-
- default:
- debug("invalid len %d", val_len);
- return;
- }
- }
-
- static void step(ssize_t v) {
- if ((val_p == NULL) || (val_len <= 0)) {
- debug("invalid params");
- return;
- }
-
- if (((v > 0) && (val >= val_max))
- || ((v < 0) && (val <= val_min))) {
- debug("val=%d v=%d", val, v);
- return;
- }
-
- switch (val_mode) {
- case VAL_STEP_INCREMENT:
- val += v * val_step;
- break;
-
- case VAL_STEP_SHIFT:
- if ((val_step * v) > 0) {
- val <<= val_step;
- } else {
- val >>= val_step;
- }
- break;
- }
-
- // apply new value while editing
- write();
- }
-
- static void value_buttons(enum buttons btn, bool state) {
- if (state && (btn == BTN_Y)) {
- state_switch(val_ret_state);
- } else if (state && (btn == BTN_LEFT)) {
- step(-1);
- draw();
- } else if (state && (btn == BTN_RIGHT)) {
- step(1);
- draw();
- }
- }
-
- void state_value_enter(void) {
- buttons_callback(value_buttons);
-
- switch (val_len) {
- case 1:
- val = *((uint8_t *)val_p);
- break;
-
- case 2:
- val = *((uint16_t *)val_p);
- break;
-
- case 4:
- val = *((uint32_t *)val_p);
- break;
-
- default:
- debug("invalid len %d", val_len);
- return;
- }
-
- draw();
- }
-
- void state_value_exit(void) {
- buttons_callback(NULL);
- write();
- }
-
- void state_value_run(void) { }
|