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- /*
- * state_string.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 <string.h>
-
- #include "config.h"
- #include "buttons.h"
- #include "lcd.h"
- #include "menu.h"
- #include "text.h"
- #include "textbox.h"
- #include "state_string.h"
-
- static char *str_p = NULL;
- static size_t str_len = 0;
- static const char *str_name = NULL;
- static enum system_state str_ret_state = STATE_SCAN;
- static size_t edit = 0, offset = 0;
-
- void state_string_set(char *value, size_t length,
- const char *name) {
- str_p = value;
- str_len = length;
- str_name = name;
- }
-
- void state_string_return(enum system_state state) {
- str_ret_state = state;
- }
-
- static void draw(void) {
- static char buff[42];
-
- if ((str_p == NULL) || (str_len <= 0) || (str_name == NULL)) {
- snprintf(buff, sizeof(buff), "error");
- } else {
- snprintf(buff, sizeof(buff), "%s:\n\n'%s'", str_name, str_p + offset);
- }
-
- text_box(buff, false,
- "fixed_10x20",
- 0, LCD_WIDTH,
- 50, MENU_BOX_HEIGHT(MENU_MAX_LINES, 20, 2),
- 0);
-
- size_t ch = edit - offset + 1;
- lcd_write_rect(ch * 10,
- 50 + 3 * 22,
- ch * 10 + 10,
- 50 + 3 * 22 + 3,
- LCD_WHITE);
- }
-
- static void string_buttons(enum buttons btn, bool state) {
- if (state && (btn == BTN_Y)) {
- state_switch(str_ret_state);
- } else if (state && (btn == BTN_LEFT)) {
- if (edit > 0) {
- edit--;
- }
- } else if (state && (btn == BTN_RIGHT)) {
- if (edit < (str_len - 1)) {
- edit++;
- }
- size_t l = strlen(str_p);
- while (edit >= l) {
- str_p[l++] = ' ';
- }
- } else if (state && (btn == BTN_UP)) {
- char *c = str_p + edit;
- if ((*c >= ' ') && (*c < '~')) {
- (*c)++;
- }
- } else if (state && (btn == BTN_DOWN)) {
- char *c = str_p + edit;
- if ((*c > ' ') && (*c <= '~')) {
- (*c)--;
- }
- } else if (state && (btn == BTN_B)) {
- char *c = str_p + edit;
- *c = '\0';
- } else {
- return;
- }
-
- while (edit < offset) {
- offset -= 1;
- }
- while (edit >= (offset + (LCD_WIDTH / 10 - 3))) {
- offset += 1;
- }
-
- draw();
- }
-
- void state_string_enter(void) {
- buttons_callback(string_buttons);
- edit = 0;
- offset = 0;
- draw();
- }
-
- void state_string_exit(void) {
- buttons_callback(NULL);
- }
-
- void state_string_run(void) { }
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