Make *OptionChoice components scrollable

api/src/main/java/com/bartlomiejpluta/base/lib/gui/HOptionChoice.java

@@ -2,35 +2,48 @@ package com.bartlomiejpluta.base.lib.gui;
 
 import com.bartlomiejpluta.base.api.context.Context;
 import com.bartlomiejpluta.base.api.event.Event;
+import com.bartlomiejpluta.base.api.gui.Component;
 import com.bartlomiejpluta.base.api.gui.GUI;
 import com.bartlomiejpluta.base.api.input.Key;
 import com.bartlomiejpluta.base.api.input.KeyAction;
 import com.bartlomiejpluta.base.api.input.KeyEvent;
+import com.bartlomiejpluta.base.api.screen.Screen;
+import com.bartlomiejpluta.base.util.math.MathUtil;
+import lombok.NonNull;
 
 import java.util.EnumSet;
 
-public class HOptionChoice extends HScrollableLayout {
+public class HOptionChoice extends HLayout {
    private static final EnumSet<KeyAction> ACTIONS = EnumSet.of(KeyAction.PRESS, KeyAction.REPEAT);
    private int selected = 0;
+   private float scroll = 0;
+   private Component component = null;
+   private float scrollSpeed = 1f;
 
    public HOptionChoice(Context context, GUI gui) {
       super(context, gui);
       addEventListener(KeyEvent.TYPE, this::switchOption);
    }
 
+   public void setScrollSpeed(@NonNull Float scrollSpeed) {
+      this.scrollSpeed = MathUtil.clamp(scrollSpeed, 0f, 1f);
+   }
+
    @Override
    public void focus() {
       super.focus();
 
       if (!children.isEmpty()) {
-         children.get(selected).focus();
+         component = children.get(selected);
+         component.focus();
       }
    }
 
    @Override
    public <E extends Event> void handleEvent(E event) {
       if (selected < children.size()) {
-         children.get(selected).handleEvent(event);
+         component = children.get(selected);
+         component.handleEvent(event);
       }
 
       if (!event.isConsumed()) {
@@ -46,33 +59,45 @@ public class HOptionChoice extends HScrollableLayout {
       if (event.getKey() == Key.KEY_RIGHT && ACTIONS.contains(event.getAction())) {
          blurAll();
          selected = (++selected) % children.size();
-         children.get(selected).focus();
-         scrollToSelected();
+         component = children.get(selected);
+         component.focus();
          event.consume();
       } else if (event.getKey() == Key.KEY_LEFT && ACTIONS.contains(event.getAction())) {
          blurAll();
          var size = children.size();
          selected = (((--selected) % size) + size) % size;
-         children.get(selected).focus();
-         scrollToSelected();
+         component = children.get(selected);
+         component.focus();
          event.consume();
       }
    }
 
-   private void scrollToSelected() {
-      var childrenWidth = 0.0f;
-
-      for (int i = 0; i < selected; ++i) {
-         var child = this.children.get(i);
-         childrenWidth += child.getMarginLeft() + child.getWidth() + child.getMarginRight();
-      }
-
-      scrollTo(childrenWidth / getWidth());
-   }
-
    private void blurAll() {
       for (var child : children) {
          child.blur();
       }
    }
+
+   @Override
+   public void update(float dt) {
+      super.update(dt);
+      if (component != null) {
+         if (component.getX() + component.getWidth() > getWidth() + getX()) {
+            scroll += (component.getWidth() + component.getX() - (getWidth() + getX())) * scrollSpeed;
+         } else if (component.getX() < getX()) {
+            scroll += (component.getX() - getX()) * scrollSpeed;
+         }
+      }
+   }
+
+   @Override
+   public void draw(Screen screen, GUI gui) {
+      gui.clip(x, y, getWidth(), getHeight());
+
+      offsetX = -scroll;
+
+      super.draw(screen, gui);
+
+      gui.resetClip();
+   }
 }

api/src/main/java/com/bartlomiejpluta/base/lib/gui/VOptionChoice.java

@@ -2,35 +2,48 @@ package com.bartlomiejpluta.base.lib.gui;
 
 import com.bartlomiejpluta.base.api.context.Context;
 import com.bartlomiejpluta.base.api.event.Event;
+import com.bartlomiejpluta.base.api.gui.Component;
 import com.bartlomiejpluta.base.api.gui.GUI;
 import com.bartlomiejpluta.base.api.input.Key;
 import com.bartlomiejpluta.base.api.input.KeyAction;
 import com.bartlomiejpluta.base.api.input.KeyEvent;
+import com.bartlomiejpluta.base.api.screen.Screen;
+import com.bartlomiejpluta.base.util.math.MathUtil;
+import lombok.NonNull;
 
 import java.util.EnumSet;
 
-public class VOptionChoice extends VScrollableLayout {
+public class VOptionChoice extends VLayout {
    private static final EnumSet<KeyAction> ACTIONS = EnumSet.of(KeyAction.PRESS, KeyAction.REPEAT);
    private int selected = 0;
+   private float scroll = 0;
+   private Component component = null;
+   private float scrollSpeed = 1f;
 
    public VOptionChoice(Context context, GUI gui) {
       super(context, gui);
       addEventListener(KeyEvent.TYPE, this::switchOption);
    }
 
+   public void setScrollSpeed(@NonNull Float scrollSpeed) {
+      this.scrollSpeed = MathUtil.clamp(scrollSpeed, 0f, 1f);
+   }
+
    @Override
    public void focus() {
       super.focus();
 
       if (!children.isEmpty()) {
-         children.get(selected).focus();
+         component = children.get(selected);
+         component.focus();
       }
    }
 
    @Override
    public <E extends Event> void handleEvent(E event) {
       if (selected < children.size()) {
-         children.get(selected).handleEvent(event);
+         component = children.get(selected);
+         component.handleEvent(event);
       }
 
       if (!event.isConsumed()) {
@@ -46,33 +59,45 @@ public class VOptionChoice extends VScrollableLayout {
       if (event.getKey() == Key.KEY_DOWN && ACTIONS.contains(event.getAction())) {
          blurAll();
          selected = (++selected) % children.size();
-         children.get(selected).focus();
-         scrollToSelected();
+         component = children.get(selected);
+         component.focus();
          event.consume();
       } else if (event.getKey() == Key.KEY_UP && ACTIONS.contains(event.getAction())) {
          blurAll();
          var size = children.size();
          selected = (((--selected) % size) + size) % size;
-         children.get(selected).focus();
-         scrollToSelected();
+         component = children.get(selected);
+         component.focus();
          event.consume();
       }
    }
 
-   private void scrollToSelected() {
-      var childrenHeight = 0.0f;
-
-      for (int i = 0; i < selected; ++i) {
-         var child = children.get(i);
-         childrenHeight += child.getMarginTop() + child.getHeight() + child.getMarginBottom();
-      }
-
-      scrollTo(childrenHeight / getHeight());
-   }
-
    private void blurAll() {
       for (var child : children) {
          child.blur();
       }
    }
+
+   @Override
+   public void update(float dt) {
+      super.update(dt);
+      if (component != null) {
+         if (component.getY() + component.getHeight() > getHeight() + getY()) {
+            scroll += (component.getHeight() + component.getY() - (getHeight() + getY())) * scrollSpeed;
+         } else if (component.getY() < getY()) {
+            scroll += (component.getY() - getY()) * scrollSpeed;
+         }
+      }
+   }
+
+   @Override
+   public void draw(Screen screen, GUI gui) {
+      gui.clip(x, y, getWidth(), getHeight());
+
+      offsetY = -scroll;
+
+      super.draw(screen, gui);
+
+      gui.resetClip();
+   }
 }