feat(scene/main_menu): handle key down holding

app/src/main/java/org/vibecoders/moongazer/scenes/MainMenu.java

@@ -3,6 +3,8 @@ package org.vibecoders.moongazer.scenes;
 import static org.vibecoders.moongazer.Constants.*;
 
 import java.io.FileNotFoundException;
+import java.util.HashMap;
+import java.util.Map;
 
 import org.vibecoders.moongazer.Game;
 import org.vibecoders.moongazer.State;
@@ -24,6 +26,7 @@ public class MainMenu extends Scene {
     private FileHandle videoFileHandle;
     private Texture titleTexture;
     private UITextButton[] buttons;
+    private HashMap<Integer, Long> currentKeyDown = new HashMap<>();
     private float titleY, titleX, titleWidth, titleHeight;
     private boolean videoPrepared = false;
     private int currentChoice = -1;
@@ -129,6 +132,40 @@ public class MainMenu extends Scene {
         root.addListener(new InputListener() {
             @Override
             public boolean keyDown(InputEvent event, int keycode) {
+                sKeyDown(event, keycode);
+                currentKeyDown.put(keycode, System.currentTimeMillis());
+                return true;
+            }
+        });
+
+        root.addListener(new InputListener() {
+            @Override
+            public boolean keyUp(InputEvent event, int keycode) {
+                currentKeyDown.remove(keycode);
+                return true;
+            }
+        });
+    }
+
+    private void startVideoOnce() {
+        if (videoPlayer == null || videoPrepared)
+            return;
+        if (videoFileHandle == null || !videoFileHandle.exists())
+            return;
+        if (game.transition == null && game.state != State.MAIN_MENU)
+            return;
+        videoPlayer.setLooping(true);
+        videoPlayer.play();
+        videoPrepared = true;
+    }
+
+    /**
+     * The actual key down handler. ((s)cene key down)
+     * 
+     * @param event not used for now, can be null
+     * @param keycode the keycode of the pressed key
+     */
+    public void sKeyDown(InputEvent event, int keycode) {
         log.trace("Key pressed: {}", keycode);
         switch (keycode) {
             case Input.Keys.UP:
@@ -156,25 +193,19 @@ public class MainMenu extends Scene {
                 }
             }
         }
-                return true;
-            }
-        });
-    }
-
-    private void startVideoOnce() {
-        if (videoPlayer == null || videoPrepared)
-            return;
-        if (videoFileHandle == null || !videoFileHandle.exists())
-            return;
-        if (game.transition == null && game.state != State.MAIN_MENU)
-            return;
-        videoPlayer.setLooping(true);
-        videoPlayer.play();
-        videoPrepared = true;
     }
 
     @Override
     public void render(SpriteBatch batch) {
+        // SDL way of handling key input XD
+        for (Map.Entry<Integer, Long> entry : currentKeyDown.entrySet()) {
+            Integer keyCode = entry.getKey();
+            Long timeStamp = entry.getValue();
+            if (System.currentTimeMillis() - timeStamp > 100) {
+                sKeyDown(null, keyCode);
+                currentKeyDown.put(keyCode, System.currentTimeMillis());
+            }
+        }
         startVideoOnce();
         videoPlayer.update();
         Texture videoTexture = videoPlayer.getTexture();