Touch and display driver subsystems reworked (and more) (#302)

- Refactored `TouchDevice`: it can now start/stop LVGL separately, and it has an optional `TouchDriver` interface
- Refactored `DisplayDevice`: it can now start/stop LVGL separately, and it has an optional `DisplayDriver` interface
- Updated all boards and drivers for above changes
- LVGL can now be stopped and (re)started on the fly
- Fixed issues with restarting Gui and Statusbar services
- Refactored `Gui` service to be class and renamed `Gui` to `GuiService`
- Fixed `Statusbar` service: forgot to deregister one of the icons
- Updated `esp_lcd_st7701` to v1.1.3
- `lv_textarea_create()` now automatically registers the hardware keyboard hooks (by wrapping the function)
- Fixed and updated `tactility.py`
- Cleanup of a lot of code
- `BootInitLvglBegin` and `BootInitLvglEnd` are replaced by `LvglStarted` and `LvglStopped`.
- Introduced `tt::service::State` which is accessible via `tt::service::getState()` (and internally via `ServiceInstance`)
- Started replacing `#define TAG` with `constexpr auto TAG = "..";`

Tactility/Source/service/gui/Keyboard.cpp

@@ -1,65 +1,74 @@
 #include "Tactility/lvgl/Keyboard.h"
 #include "Tactility/Check.h"
 #include "Tactility/lvgl/LvglSync.h"
-#include "Tactility/service/gui/Gui.h"
+#include "Tactility/service/gui/GuiService.h"
 
 #include <Tactility/TactilityConfig.h>
+#include <Tactility/service/espnow/EspNowService.h>
 
 namespace tt::service::gui {
 
-extern Gui* gui;
-
 static void show_keyboard(lv_event_t* event) {
-    lv_obj_t* target = lv_event_get_current_target_obj(event);
-    softwareKeyboardShow(target);
-    lv_obj_scroll_to_view(target, LV_ANIM_ON);
+    auto service = findService();
+    if (service != nullptr) {
+        lv_obj_t* target = lv_event_get_current_target_obj(event);
+        service->softwareKeyboardShow(target);
+        lv_obj_scroll_to_view(target, LV_ANIM_ON);
+    }
 }
 
 static void hide_keyboard(TT_UNUSED lv_event_t* event) {
-    softwareKeyboardHide();
+    auto service = findService();
+    if (service != nullptr) {
+        service->softwareKeyboardHide();
+    }
 }
 
-bool softwareKeyboardIsEnabled() {
+bool GuiService::softwareKeyboardIsEnabled() {
     return !lvgl::hardware_keyboard_is_available() || TT_CONFIG_FORCE_ONSCREEN_KEYBOARD;
 }
 
-void softwareKeyboardShow(lv_obj_t* textarea) {
+void GuiService::softwareKeyboardShow(lv_obj_t* textarea) {
     lock();
 
-    if (gui->keyboard) {
-        lv_obj_clear_flag(gui->keyboard, LV_OBJ_FLAG_HIDDEN);
-        lv_keyboard_set_textarea(gui->keyboard, textarea);
+    if (isStarted && keyboard != nullptr) {
+        lv_obj_clear_flag(keyboard, LV_OBJ_FLAG_HIDDEN);
+        lv_keyboard_set_textarea(keyboard, textarea);
     }
 
     unlock();
 }
 
-void softwareKeyboardHide() {
+void GuiService::softwareKeyboardHide() {
     lock();
 
-    if (gui->keyboard) {
-        lv_obj_add_flag(gui->keyboard, LV_OBJ_FLAG_HIDDEN);
+    if (isStarted && keyboard != nullptr) {
+        lv_obj_add_flag(keyboard, LV_OBJ_FLAG_HIDDEN);
     }
 
     unlock();
 }
 
-void keyboardAddTextArea(lv_obj_t* textarea) {
+void GuiService::keyboardAddTextArea(lv_obj_t* textarea) {
     lock();
-    tt_check(lvgl::lock(0), "lvgl should already be locked before calling this method");
 
-    if (softwareKeyboardIsEnabled()) {
-        lv_obj_add_event_cb(textarea, show_keyboard, LV_EVENT_FOCUSED, nullptr);
-        lv_obj_add_event_cb(textarea, hide_keyboard, LV_EVENT_DEFOCUSED, nullptr);
-        lv_obj_add_event_cb(textarea, hide_keyboard, LV_EVENT_READY, nullptr);
+    if (isStarted) {
+        tt_check(lvgl::lock(0), "lvgl should already be locked before calling this method");
+
+        if (softwareKeyboardIsEnabled()) {
+            lv_obj_add_event_cb(textarea, show_keyboard, LV_EVENT_FOCUSED, nullptr);
+            lv_obj_add_event_cb(textarea, hide_keyboard, LV_EVENT_DEFOCUSED, nullptr);
+            lv_obj_add_event_cb(textarea, hide_keyboard, LV_EVENT_READY, nullptr);
+        }
+
+        // lv_obj_t auto-remove themselves from the group when they are destroyed (last checked in LVGL 8.3)
+        lv_group_add_obj(keyboardGroup, textarea);
+
+        lvgl::software_keyboard_activate(keyboardGroup);
+
+        lvgl::unlock();
     }
 
-    // lv_obj_t auto-remove themselves from the group when they are destroyed (last checked in LVGL 8.3)
-    lv_group_add_obj(gui->keyboardGroup, textarea);
-
-    lvgl::software_keyboard_activate(gui->keyboardGroup);
-
-    lvgl::unlock();
     unlock();
 }