Enable programmatically referencing Window's components

api/src/main/java/com/bartlomiejpluta/base/api/gui/Component.java

@@ -1,7 +1,9 @@
 package com.bartlomiejpluta.base.api.gui;
 
+import java.util.List;
+
 public interface Component extends Widget {
-   Iterable<Component> getChildren();
+   List<Component> getChildren();
 
    void add(Component component);
 

api/src/main/java/com/bartlomiejpluta/base/api/gui/GUI.java

@@ -22,8 +22,12 @@ public interface GUI extends Renderable, Updatable, Disposable {
 
    Component inflateComponent(String widgetUid);
 
+   <T extends Component> T inflateComponent(String widgetUid, Class<T> type);
+
    Window inflateWindow(String widgetUid);
 
+   <T extends Window> T inflateWindow(String widgetUid, Class<T> type);
+
    boolean isVisible();
 
    void setVisible(boolean visible);

api/src/main/java/com/bartlomiejpluta/base/api/gui/Window.java

@@ -7,6 +7,10 @@ public interface Window extends Widget {
 
    void setWindowPosition(WindowPosition windowPosition);
 
+   Component reference(String ref);
+
+   <T extends Component> T reference(String ref, Class<T> type);
+
    default void onOpen(WindowManager manager) {
       // do nothing
    }

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

@@ -4,6 +4,8 @@ import com.bartlomiejpluta.base.api.context.Context;
 import com.bartlomiejpluta.base.api.gui.Component;
 import com.bartlomiejpluta.base.api.gui.GUI;
 
+import java.util.List;
+
 import static java.util.Collections.emptyList;
 
 public abstract class BaseComponent extends BaseWidget implements Component {
@@ -17,7 +19,7 @@ public abstract class BaseComponent extends BaseWidget implements Component {
    }
 
    @Override
-   public Iterable<Component> getChildren() {
+   public List<Component> getChildren() {
       return emptyList();
    }
 

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

@@ -20,7 +20,7 @@ public abstract class BaseContainer extends BaseComponent {
    }
 
    @Override
-   public Iterable<Component> getChildren() {
+   public List<Component> getChildren() {
       return readOnlyChildren;
    }
 

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

@@ -4,7 +4,12 @@ import com.bartlomiejpluta.base.api.context.Context;
 import com.bartlomiejpluta.base.api.event.Event;
 import com.bartlomiejpluta.base.api.gui.*;
 import com.bartlomiejpluta.base.api.screen.Screen;
+import lombok.Getter;
+import lombok.NonNull;
 
+import java.util.Map;
+
+import static java.lang.String.format;
 import static java.util.Objects.requireNonNull;
 
 public abstract class BaseWindow extends BaseWidget implements Window {
@@ -12,11 +17,16 @@ public abstract class BaseWindow extends BaseWidget implements Window {
    protected GUI gui;
    protected WindowManager manager;
    protected Component content;
+
+   @Getter
+   private final Map<String, Component> refs;
+
    protected WindowPosition windowPosition = WindowPosition.CENTER;
 
-   protected BaseWindow(Context context, GUI gui) {
+   protected BaseWindow(Context context, GUI gui, Map<String, Component> refs) {
       this.context = context;
       this.gui = gui;
+      this.refs = refs;
    }
 
    @Override
@@ -32,6 +42,16 @@ public abstract class BaseWindow extends BaseWidget implements Window {
       }
    }
 
+   @Override
+   public Component reference(@NonNull String ref) {
+      return requireNonNull(refs.get(ref), format("Referenced component (with ref=[%s]) does not exist", ref));
+   }
+
+   @Override
+   public <T extends Component> T reference(String ref, Class<T> type) {
+      return type.cast(requireNonNull(refs.get(ref), format("Referenced component (with ref=[%s]) does not exist", ref)));
+   }
+
    @Override
    public WindowPosition getWindowPosition() {
       return windowPosition;

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

@@ -133,5 +133,6 @@ public class Label extends BaseComponent {
       gui.setFillColor(color);
       gui.fill();
       gui.putTextBox(x + paddingLeft, y + paddingTop, getWidth() - paddingLeft - paddingRight, text, bounds);
+      gui.closePath();
    }
 }