platform/platform-api/src/com/intellij/openapi/ui/Painter.java

/*
 * Copyright 2000-2009 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.openapi.ui;

import com.intellij.util.ObjectUtils;

import java.awt.*;

import org.jetbrains.annotations.Nullable;

import javax.swing.*;

public interface Painter {

  boolean needsRepaint();
  void paint(Component component, final Graphics2D g);

  void addListener(Listener listener);
  void removeListener(Listener listener);

  interface Listener {
    void onNeedsRepaint(Painter painter, @Nullable JComponent dirtyComponent);
  }

}