Remove WidgetCharset class and introduce templated WidgetList class

src/widget/WidgetList.h

@@ -0,0 +1,112 @@
+#pragma once
+
+#include "BaseWidgetValue.h"
+
+/**
+ * @class WidgetList
+ * @brief Widget that allows a user to select a value from a list.
+ * Manages a value within a specified list, allowing cycling through values.
+ */
+template <typename T>
+class WidgetList : public BaseWidgetValue<T> {
+  protected:
+    const uint8_t size;
+    uint8_t activePosition;
+    const bool cycle;
+    const T* values;
+
+  public:
+    WidgetList(
+        const T values[],
+        const uint8_t size,
+        const int8_t activePosition,
+        const char* format,
+        const uint8_t cursorOffset,
+        const bool cycle,
+        void (*callback)(const T&))
+        : BaseWidgetValue<T>(values[activePosition], format, cursorOffset, callback),
+          size(size),
+          activePosition(activePosition),
+          cycle(cycle),
+          values(values) {}
+
+  protected:
+    /**
+     * @brief Process command.
+     *
+     * Handle commands:
+     * - `UP` - increment value and trigger callback;
+     * - `DOWN` - decrement value and trigger callback;
+     */
+    bool process(LcdMenu* menu, const unsigned char command) override {
+        MenuRenderer* renderer = menu->getRenderer();
+        if (renderer->isInEditMode()) {
+            switch (command) {
+                case UP:
+                    if (nextValue()) {
+                        updateValue(F("WidgetList::nextValue"));
+                    }
+                    return true;
+                case DOWN:
+                    if (previousValue()) {
+                        updateValue(F("WidgetList::previousValue"));
+                    }
+                    return true;
+                default:
+                    return false;
+            }
+        }
+        return false;
+    }
+    void updateValue(const __FlashStringHelper* action) {
+        this->value = values[activePosition];
+        BaseWidgetValue<T>::handleChange();
+        LOG(action, this->value);
+    }
+    bool nextValue() {
+        if (activePosition + 1 < size) {
+            activePosition++;
+            return true;
+        }
+        if (cycle) {
+            activePosition = 0;
+            return true;
+        }
+        return false;
+    }
+    bool previousValue() {
+        if (activePosition > 0) {
+            activePosition--;
+            return true;
+        }
+        if (cycle) {
+            activePosition = size - 1;
+            return true;
+        }
+        return false;
+    }
+};
+
+/**
+ * @brief Function to create a new WidgetList<T> instance.
+ * @tparam T The type of the value.
+ *
+ * @param values The list of values to choose from.
+ * @param size The size of the list.
+ * @param activePosition The initial active position in the list (default: 0).
+ * @param format The format of the value (default: "%s").
+ * @param cursorOffset The cursor offset (default: 0).
+ * @param cycle Whether to cycle through the list (default: false).
+ * @param callback The callback function to call when the value changes (default: nullptr).
+ */
+template <typename T>
+inline BaseWidgetValue<T>* WIDGET_LIST(
+    const T values[],
+    const uint8_t size,
+    const uint8_t activePosition = 0,
+    const char* format = "%s",
+    const uint8_t cursorOffset = 0,
+    const bool cycle = false,
+    void (*callback)(const T&) = nullptr) {
+    return new WidgetList<T>(values, size, activePosition, format, cursorOffset, cycle, callback);
+}