Added component list classes (unfinished)

src/main/java/envoy/client/ui/list/ComponentList.java

@@ -0,0 +1,32 @@
+package envoy.client.ui.list;
+
+import javax.swing.BoxLayout;
+import javax.swing.JPanel;
+
+/**
+ * Project: <strong>envoy-client</strong><br>
+ * File: <strong>ComponentList.java</strong><br>
+ * Created: <strong>25.01.2020</strong><br>
+ * 
+ * @author Kai S. K. Engelbart
+ * @since Envoy v0.3-alpha
+ */
+public class ComponentList<E> extends JPanel {
+
+	private ComponentListCellRenderer<E> renderer;
+
+	private static final long serialVersionUID = 1759644503942876737L;
+
+	public ComponentList(ComponentListModel<E> model, ComponentListCellRenderer<E> renderer) {
+		setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
+		model.setComponentList(this);
+		this.renderer = renderer;
+
+		for (E elem : model)
+			add(renderer.getListCellComponent(this, elem, false));
+	}
+
+	void add(E elem) {
+		add(renderer.getListCellComponent(this, elem, false));
+	}
+}

src/main/java/envoy/client/ui/list/ComponentListCellRenderer.java

@@ -0,0 +1,16 @@
+package envoy.client.ui.list;
+
+import java.awt.Component;
+
+/**
+ * Project: <strong>envoy-client</strong><br>
+ * File: <strong>ComponentListCellRenderer.java</strong><br>
+ * Created: <strong>25.01.2020</strong><br>
+ * 
+ * @author Kai S. K. Engelbart
+ * @since Envoy v0.3-alpha
+ */
+public interface ComponentListCellRenderer<E> {
+
+	Component getListCellComponent(ComponentList<E> list, E value, boolean isSelected);
+}

src/main/java/envoy/client/ui/list/ComponentListModel.java

@@ -0,0 +1,83 @@
+package envoy.client.ui.list;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+/**
+ * Project: <strong>envoy-client</strong><br>
+ * File: <strong>ComponentListModel.java</strong><br>
+ * Created: <strong>25.01.2020</strong><br>
+ * 
+ * @author Kai S. K. Engelbart
+ * @since Envoy v0.3-alpha
+ */
+public final class ComponentListModel<E> implements Iterable<E> {
+
+	private List<E> elements = new ArrayList<>();
+	private ComponentList<E> componentList;
+
+	/**
+	 * Adds an element to this model and notifies the associated
+	 * {@link ComponentList} to add the corresponding component.
+	 * 
+	 * @param e the element to add
+	 * @return {@code true}
+	 * @see java.util.List#add(java.lang.Object)
+	 */
+	public boolean add(E e) {
+		componentList.add(e);
+		return elements.add(e);
+	}
+
+	/**
+	 * Removes all elements from this model and clears the associated
+	 * {@link ComponentList}.
+	 * 
+	 * @see java.util.List#clear()
+	 * @since Envoy v0.3-alpha
+	 */
+	public void clear() {
+		elements.clear();
+		componentList.removeAll();
+	}
+
+	/**
+	 * @param index
+	 * @return
+	 * @see java.util.List#get(int)
+	 */
+	public E get(int index) { return elements.get(index); }
+
+	/**
+	 * Removes the element at a specific index from this model and the corresponding
+	 * component from the {@link ComponentList}.
+	 * 
+	 * @param index
+	 * @return the removed element
+	 * @see java.util.List#remove(int)
+	 */
+	public E remove(int index) {
+		componentList.remove(index);
+		return elements.remove(index);
+	}
+
+	/**
+	 * @return
+	 * @see java.util.List#iterator()
+	 */
+	public Iterator<E> iterator() {
+		return new Iterator<E>() {
+
+			Iterator<E> iter = elements.iterator();
+			
+			@Override
+			public boolean hasNext() { return iter.hasNext(); }
+
+			@Override
+			public E next() { return iter.next(); }
+		};
+	}
+
+	void setComponentList(ComponentList<E> componentList) { this.componentList = componentList; }
+}