feat: add DemoApp and ShutdownApp classes for interactive UI and shutdown management

main/ui/apps/shutdown_app.cpp

@@ -0,0 +1,64 @@
+#include "apps/shutdown_app.h"
+#include "esp_log.h"
+
+#define TAG "ShutdownApp"
+
+ShutdownApp::ShutdownApp(std::string message)
+  : _message(message.empty() ? "System Shutting Down..." : message) { }
+
+esp_err_t ShutdownApp::init(lv_obj_t* container) {
+  if (!container) {
+    ESP_LOGE(TAG, "Container is null");
+    return ESP_ERR_INVALID_ARG;
+  }
+
+  _container = container;
+  ESP_LOGI(TAG, "Initializing shutdown app with message: %s", _message.c_str());
+
+  // Main message label
+  _label_message = lv_label_create(_container);
+  lv_label_set_text(_label_message, _message.c_str());
+  lv_obj_set_style_text_color(_label_message, lv_color_white(), 0);
+  lv_obj_align(_label_message, LV_ALIGN_CENTER, 0, 0);
+
+  // Optional: Add spinner animation
+  lv_obj_t* spinner = lv_spinner_create(_container);
+  lv_obj_set_size(spinner, 80, 80);
+  lv_obj_align(spinner, LV_ALIGN_CENTER, 0, 80);
+  lv_obj_set_style_arc_color(spinner, lv_color_white(), LV_PART_INDICATOR);
+
+  ESP_LOGI(TAG, "Shutdown app initialized successfully");
+  return ESP_OK;
+}
+
+esp_err_t ShutdownApp::deinit(void) {
+  ESP_LOGI(TAG, "Deinitializing shutdown app");
+  _label_message = nullptr;
+  return ESP_OK;
+}
+
+std::string ShutdownApp::get_name(void) const {
+  return "Shutdown";
+}
+
+// ShutdownAppDescriptor implementation
+ShutdownApp* ShutdownAppDescriptor::_app_instance = nullptr;
+
+ShutdownAppDescriptor::ShutdownAppDescriptor()
+  : AppDescriptor("Shutdown", nullptr) {
+  // Create singleton app instance with default message
+  if (!_app_instance) {
+    _app_instance = new ShutdownApp();
+  }
+
+  // it's only used during system shutdown, not as a user-launchable app
+}
+
+void ShutdownAppDescriptor::draw_icon(lv_obj_t* parent) {
+  // Create a simple icon (not normally shown in nav bar)
+  lv_obj_t* icon_label = lv_label_create(parent);
+  lv_label_set_text(icon_label, LV_SYMBOL_POWER "\nShutdown");
+  lv_obj_set_style_text_color(icon_label, lv_color_white(), 0);
+  lv_obj_set_style_text_align(icon_label, LV_TEXT_ALIGN_CENTER, 0);
+  lv_obj_center(icon_label);
+}