Cycle through fonts

examples/PoolBox/application/src/Overlay/ScreenCenter/screen_center.cpp

@@ -1,27 +1,77 @@
 #include "../../../include/shared.hpp"
 #include <PSX/GPU/gpu.hpp>
+#include <PSX/Periphery/periphery.hpp>
 #include <stdio.h>
 
 namespace ScreenCenter {
     using namespace JabyEngine;
 
-    static const char*const ASCII = "!\"#$%&'()*+,-./0\n123456789:;<=>?@\nABCDEFGHIJKLMNOP\nQRSTUVWXYZ[\\]^_`\nabcdefghijklmnop\nqrstuvwxyz{|}~";
+    static const char*const ASCII = "!\"#$%&'()*+,-./0\n123456789:;<=>?@\nABCDEFGHIJKLMNOP\nQRSTUVWXYZ[\\]^_`\nabcdefghijklmnop\nqrstuvwxyz{|}~\n";
     
-    static void setup() {}
-    static void update() {
-        auto cursor = FontWriter::update(Make::PositionI16(8, 8));
+    static JabyEngine::FontWriter*const FontWriters[] = {
+        &FontWriter::bios_font_writer,
+        &FontWriter::new_font_writer,
+    };
+    static constexpr auto MaxFontSelector = (sizeof(FontWriters)/sizeof(FontWriters[0])) - 1;
+    static uint8_t        font_selector   = 0;
 
-        FontWriter::bios_font_writer.write(cursor, ASCII);
+    static void increment_font_selector() {
+        if(font_selector == MaxFontSelector) {
+            font_selector = 0;
+        }
+
+        else {
+            font_selector++;
+        }
     }
+
+    static void decrement_font_selector() {
+        if(font_selector == 0) {
+            font_selector = MaxFontSelector;
+        }
+
+        else {
+            font_selector--;
+        }
+    }
+
+    static void setup() {
+        Shared::back_menu.reset();
+        font_selector = 0;
+    }
+
+    static bool update_or_exit() {
+        Periphery::query_controller();
+        if(Shared::back_menu.update(Make::PositionI16(0, GPU::Display::Height - 32))) {
+            return true;
+        }
+
+        const auto& controller = Periphery::get_primary_controller_as<Periphery::GenericController>();
+        if(controller.button.went_up(Periphery::GenericController::Button::L1)) {
+            decrement_font_selector();
+        }
+        if(controller.button.went_up(Periphery::GenericController::Button::R1)) {
+            increment_font_selector();
+        }
+
+        auto cursor = FontWriter::update(Make::PositionI16(8, 8));
+        FontWriters[font_selector]->write(cursor, ASCII);
+        FontWriters[font_selector]->write(cursor, "\nPress L1 or R1 to cycle\nthrough fonts");
+        return false;
+    }
+
     static void render() {
-        FontWriter::bios_font_writer.render();
+        FontWriters[font_selector]->render();
+        Shared::back_menu.render();
     }
 
     void main() {
         setup();
 
         while(true) {
-            update();
+            if(update_or_exit()) {
+                break;
+            }
             GPU::swap_buffers_vsync(1);
             render();
         }