Support simple Menu

examples/PoolBox/application/src/menu.cpp

@@ -0,0 +1,36 @@
+#include "include/menu.hpp"
+#include <PSX/Periphery/periphery.hpp>
+
+namespace Menu {
+    void SimpleMenu :: setup(const Entry* entries, size_t size) {
+        this->entries       = entries;
+        this->size          = size;
+        this->cur_selection = 0;
+    }
+
+    void SimpleMenu :: update(JabyEngine::FontWriter& font_writer, State& cursor, const GPU::PositionI16& start) {
+        using DigitalButton = Periphery::GenericController::Button;
+        const auto& controller = Periphery::get_primary_controller_as<JabyEngine::Periphery::GenericController>();
+
+        if(controller.button.went_down(DigitalButton::Up) && this->cur_selection > 0) {
+            this->cur_selection -= 1;
+        } 
+
+        if(controller.button.went_down(DigitalButton::Down) && this->cur_selection < (this->size - 1)) {
+            this->cur_selection += 1;
+        }
+
+        cursor.pos = Make::PositionI16(8, 64);
+        for(size_t n = 0; n < this->size; n++) {
+            const auto& cur_entry = this->entries[n];
+
+            if(this->cur_selection == n) {
+                FontWriter::bios_font_writer.write(cursor, ">%s<\n", cur_entry.name);
+            }
+
+            else {
+                FontWriter::bios_font_writer.write(cursor, "%s\n", cur_entry.name);
+            }
+        }
+    }
+}