Se me olvido incluir un par de archivos .w.

src/danielcortes/xyz/views/components/KeySelectionRenderer.java

@@ -0,0 +1,99 @@
+package danielcortes.xyz.views.components;
+
+import javax.swing.*;
+import java.awt.*;
+
+public abstract class KeySelectionRenderer extends DefaultListCellRenderer implements JComboBox.KeySelectionManager {
+    private long timeFactor;
+    private long lastTime;
+    private long time;
+    private String prefix = "";
+
+    public KeySelectionRenderer(JComboBox comboBox) {
+        comboBox.setRenderer(this);
+        comboBox.setKeySelectionManager(this);
+
+        Long l = (Long) UIManager.get("ComboBox.timeFactor");
+        timeFactor = l == null ? 1000L : l.longValue();
+    }
+
+    public abstract String getDisplayValue(Object item);
+
+
+    @Override
+    public Component getListCellRendererComponent(
+            JList list, Object item, int index, boolean isSelected, boolean hasFocus) {
+        super.getListCellRendererComponent(list, item, index, isSelected, hasFocus);
+
+        if (item != null) {
+            setText(getDisplayValue(item));
+        }
+
+        return this;
+    }
+
+
+    @Override
+    public int selectionForKey(char aKey, ComboBoxModel model) {
+        time = System.currentTimeMillis();
+
+        //  Get the index of the currently selected item
+
+        int size = model.getSize();
+        int startIndex = -1;
+        Object selectedItem = model.getSelectedItem();
+
+        if (selectedItem != null) {
+            for (int i = 0; i < size; i++) {
+                if (selectedItem == model.getElementAt(i)) {
+                    startIndex = i;
+                    break;
+                }
+            }
+        }
+
+
+        if (time - lastTime < timeFactor) {
+            if ((prefix.length() == 1) && (aKey == prefix.charAt(0))) {
+                startIndex++;
+            } else {
+                prefix += aKey;
+            }
+        } else {
+            startIndex++;
+            prefix = "" + aKey;
+        }
+
+        lastTime = time;
+
+
+        if (startIndex < 0 || startIndex >= size) {
+            startIndex = 0;
+        }
+
+        int index = getNextMatch(prefix, startIndex, size, model);
+
+        if (index < 0) {
+            // wrap
+            index = getNextMatch(prefix, 0, startIndex, model);
+        }
+
+        return index;
+    }
+
+    private int getNextMatch(String prefix, int start, int end, ComboBoxModel model) {
+        for (int i = start; i < end; i++) {
+            Object item = model.getElementAt(i);
+
+            if (item != null) {
+                String displayValue = getDisplayValue(item).toLowerCase();
+
+                if (displayValue.startsWith(prefix)) {
+                    return i;
+                }
+            }
+        }
+
+        return -1;
+    }
+}