ExpandedItemListCellRendererWrapper.java example

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consulo-master
/*
 * Copyright 2000-2012 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.intellij.ui;

import org.jetbrains.annotations.NotNull;

import javax.swing.*;
import java.awt.*;

public class ExpandedItemListCellRendererWrapper<E> implements ListCellRenderer<E> {
  @NotNull private final ListCellRenderer<E> myWrappee;
  @NotNull private final ExpandableItemsHandler<Integer> myHandler;

  public ExpandedItemListCellRendererWrapper(@NotNull ListCellRenderer<E> wrappee, @NotNull ExpandableItemsHandler<Integer> handler) {
    myWrappee = wrappee;
    myHandler = handler;
  }

  @Override
  public Component getListCellRendererComponent(JList<? extends E> list, E value, int index, boolean isSelected, boolean cellHasFocus) {
    Component result = myWrappee.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
    if (myHandler.getExpandedItems().contains(index)) {
      result = new ExpandedItemRendererComponentWrapper(result);
    }
    return result;
  }

  @NotNull
  public ListCellRenderer getWrappee() {
    return myWrappee;
  }
}