Add graphical language configuration option

mkapp/app/language/ru_ru.ini

@@ -1,3 +1,8 @@
+; Languages
+Simplified Chinese = "Упрощенный китайский"
+English = "Английский"
+Russian = "Русский"
+
 SD Card = "SD-карта"
 Off = "Выкл."
 On = "Вкл."
@@ -242,8 +247,11 @@ Goggle update completed successfully = "Обновление очков заве
 Please repower goggle now = "Пожалуйста, перезагрузите очки."
 Settings reset = "Сброс настроек"
 All settings have been reset = "Все настройки сброшены."
+; Set Language = "Set Language"
+; Language has been changed = "Language has been changed"
 Empty = "Пусто"
 Goggle = "Очки"
+Language = "Язык"
 
 ; focus chart
 Focus Chart = "Фокус"

mkapp/app/language/zh_hans.ini

@@ -1,3 +1,8 @@
+; Languages
+Simplified Chinese = "简体中文"
+English = "英语"
+Russian = "俄语"
+
 SD Card = "SD卡"
 Off = "关"
 On = "开"
@@ -242,8 +247,11 @@ Goggle update completed successfully = "眼镜更新完成"
 Please repower goggle now = "现在请重启眼镜"
 Settings reset = "重置设置"
 All settings have been reset = "所有设置已被重置"
+; Set Language = "Set Language"
+; Language has been changed = "Language has been changed"
 Empty = "无"
 Goggle = "眼镜"
+Language = "语言"
 
 ; focus chart
 Focus Chart = "对焦图"

src/lang/language.c

@@ -7,6 +7,7 @@
 #include "core/common.hh"
 #include "language.h"
 #include "ui/page_common.h"
+#include "util/system.h"
 
 #include <assert.h>
 #include <stdlib.h>
@@ -127,21 +128,56 @@ bool language_config() {
     int i = 0;
 
     for (i = 0; i < LANG_END; i++) {
+        bool languageFound = false;
+
         snprintf(buf, sizeof(buf), "/mnt/extsd/%s", language_config_file[i]);
         if (access(buf, F_OK) == 0) {
             LOGI("%s found", language_config_file[i]);
             ini_putl("language", "lang", i, SETTING_INI);
             g_setting.language.lang = i;
-            return true;
+            languageFound = true;
+        } else {
+            to_lowercase(buf);
+            if (access(buf, F_OK) == 0) {
+                LOGI("%s found", language_config_file[i]);
+                ini_putl("language", "lang", i, SETTING_INI);
+                g_setting.language.lang = i;
+                languageFound = true;
+            }
         }
 
-        to_lowercase(buf);
-        if (access(buf, F_OK) == 0) {
-            LOGI("%s found", language_config_file[i]);
-            ini_putl("language", "lang", i, SETTING_INI);
-            g_setting.language.lang = i;
+        if (languageFound) {
+            char cmd[259];
+            snprintf(cmd, sizeof(cmd), "rm %s", buf);
+            system_exec(cmd);
             return true;
         }
     }
     return false;
+}
+
+/**
+ * Build a '\n'-separated list of all available languages
+ */
+char *languageList(char *buffer, size_t len) {
+    for (size_t i = 0; i < ARRAY_SIZE(languages) && len > 0; i++) {
+        const char * const currentLanguageName = _lang(languages[i].name);
+        const size_t nameLength = strlen(currentLanguageName);
+
+        if (nameLength >= len) {
+            char tmp[256];
+            snprintf(tmp, len, "%s", currentLanguageName);
+            strcat(buffer, tmp);
+            len = 0;
+        } else {
+            strcat(buffer, currentLanguageName);
+            len -= nameLength;
+            if (i < ARRAY_SIZE(languages) - 1 && len > 1) {
+                strcat(buffer, "\n");
+                len--;
+            }
+        }
+    }
+
+    return buffer;
 }

src/lang/language.h

@@ -3,7 +3,7 @@
 
 #include "core/settings.h"
 
-#define TRANSLATE_STRING_NUM 287
+#define TRANSLATE_STRING_NUM 291
 #define LANG_FOLDER          "/mnt/app/language"
 
 typedef enum {
@@ -21,6 +21,7 @@ typedef struct {
 void language_init();
 const char *translate_string(const char *str, lang_e lang);
 bool language_config();
+char *languageList(char *buffer, size_t len);
 
 #define _str(string, lang) translate_string(string, lang)
 #define _(string)          _str(string, g_setting.language.lang)

src/ui/page_version.c

@@ -34,6 +34,7 @@ enum {
     ROW_UPDATE_VTX,
     ROW_UPDATE_GOGGLE,
     ROW_UPDATE_ESP32,
+    ROW_LANGUAGE,
     ROW_BACK,
 
     ROW_COUNT
@@ -84,6 +85,10 @@ static lv_obj_t *alert_img = NULL;
 static fw_select_t fw_select_goggle;
 static fw_select_t fw_select_vtx;
 static fw_select_t *fw_select_current = &fw_select_vtx;
+static lv_obj_t *dropdown_lang;
+static lv_obj_t *msgbox_language_changed = NULL;
+
+static bool dropdown_lang_is_opened = false;
 
 #define ADDR_AL            0x65
 #define ADDR_FPGA          0x64
@@ -779,6 +784,7 @@ static void page_version_fw_select_create(const char *device, fw_select_t *fw_se
     page_version_fw_select_hide(fw_select);
 }
 
+char language_options_str[256];
 static lv_obj_t *page_version_create(lv_obj_t *parent, panel_arr_t *arr) {
     char buf[128];
     static char page_name[32];
@@ -817,6 +823,22 @@ static lv_obj_t *page_version_create(lv_obj_t *parent, panel_arr_t *arr) {
     snprintf(buf, sizeof(buf), "%s ESP32", _lang("Update"));
     btn_esp = create_label_item(cont, buf, 1, ROW_UPDATE_ESP32, 2);
     label_esp = create_label_item(cont, "", 3, ROW_UPDATE_ESP32, 2);
+
+    sprintf(buf, "%s", _lang("Language"));
+    create_label_item(cont, buf, 1, ROW_LANGUAGE, 1);
+
+    dropdown_lang = lv_dropdown_create(cont);
+    lv_dropdown_set_options(dropdown_lang, languageList(language_options_str, 256));
+    lv_obj_set_style_text_font(dropdown_lang, &lv_font_montserrat_26, 0);
+    lv_obj_set_size(dropdown_lang, 360, 60);
+    lv_obj_set_grid_cell(dropdown_lang, LV_GRID_ALIGN_START, 3, 2, LV_GRID_ALIGN_CENTER, ROW_LANGUAGE, 1);
+
+    lv_dropdown_set_selected(dropdown_lang, g_setting.language.lang);
+
+    lv_obj_t *list = lv_dropdown_get_list(dropdown_lang);
+    lv_obj_add_style(list, &style_dropdown, LV_PART_MAIN); // The dropdown consists of a button and a list. You need to add a style to the list separately.
+    lv_obj_set_style_text_color(list, lv_color_make(0, 0, 0), LV_PART_SELECTED | LV_STATE_CHECKED);
+
     snprintf(buf, sizeof(buf), "< %s", _lang("Back"));
     create_label_item(cont, buf, 1, ROW_BACK, 1);
 
@@ -850,6 +872,12 @@ static lv_obj_t *page_version_create(lv_obj_t *parent, panel_arr_t *arr) {
     msgbox_settings_reset = create_msgbox_item(_lang("Settings reset"), buf);
     lv_obj_add_flag(msgbox_settings_reset, LV_OBJ_FLAG_HIDDEN);
 
+    snprintf(buf, sizeof(buf), "%s.\n%s.",
+        _lang("Language has been changed"),
+        _lang("Please repower goggle now"));
+    msgbox_language_changed = create_msgbox_item(_lang("Set Language"), buf);
+    lv_obj_add_flag(msgbox_language_changed, LV_OBJ_FLAG_HIDDEN);
+
     msgbox_release_notes = create_msgbox_item(_lang("Release Notes"), _lang("Empty"));
     lv_obj_add_flag(msgbox_release_notes, LV_OBJ_FLAG_HIDDEN);
 
@@ -980,6 +1008,16 @@ static void page_version_on_roller(uint8_t key) {
 
     version_update_title();
 
+    if (dropdown_lang_is_opened) {
+        if (key == DIAL_KEY_UP) {
+            uint32_t evt = LV_KEY_DOWN;
+            lv_event_send(dropdown_lang, LV_EVENT_KEY, &evt);
+        } else if (key == DIAL_KEY_DOWN) {
+            uint32_t evt = LV_KEY_UP;
+            lv_event_send(dropdown_lang, LV_EVENT_KEY, &evt);
+        }
+    }
+
     if (reset_all_settings_confirm == CONFIRMATION_CONFIRMED) {
         reset_all_settings_reset_label_text();
         reset_all_settings_confirm = CONFIRMATION_UNCONFIRMED;
@@ -991,6 +1029,27 @@ static void page_version_on_click(uint8_t key, int sel) {
     FILE *fp;
     int dat[16];
 
+    if (sel == ROW_LANGUAGE) {
+        if (dropdown_lang_is_opened) {
+            lv_event_send(dropdown_lang, LV_EVENT_RELEASED, NULL);
+            lv_dropdown_close(dropdown_lang);
+            lv_obj_remove_style(dropdown_lang, &style_dropdown, LV_PART_MAIN);
+            dropdown_lang_is_opened = false;
+            pp_version.p_arr.max = ROW_COUNT; // enable roller operation on input_device.c
+            uint16_t selected = lv_dropdown_get_selected(dropdown_lang);
+            if (selected != g_setting.language.lang) {
+                ini_putl("language", "lang", selected, SETTING_INI);
+                lv_obj_clear_flag(msgbox_language_changed, LV_OBJ_FLAG_HIDDEN);
+                app_state_push(APP_STATE_USER_INPUT_DISABLED);
+            }
+        } else {
+            lv_dropdown_open(dropdown_lang);
+            lv_obj_add_style(dropdown_lang, &style_dropdown, LV_PART_MAIN);
+            dropdown_lang_is_opened = true;
+            pp_version.p_arr.max = 0; // disable roller operation on input_device.c
+        }
+    }
+
     if (!page_version_release_notes_active()) {
         version_update_title();
         switch (sel) {