content: /*
   * Copyright 2019 FormDev Software GmbH
   *
   * 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 themeengine.include.com.formdev.flatlaf.ui;
  
  import java.awt.Component;
  import java.awt.Graphics;
  import javax.swing.JComponent;
  import javax.swing.JTable;
  import javax.swing.JViewport;
  import javax.swing.plaf.ComponentUI;
  import javax.swing.plaf.basic.BasicViewportUI;
  
  /**
   * Provides the Flat LaF UI delegate for {@link javax.swing.JViewport}.
   *
   * <!-- BasicViewportUI -->
   *
   * @uiDefault Viewport.font					Font	unused
   * @uiDefault Viewport.background			Color
   * @uiDefault Viewport.foreground			Color	unused
   *
   * @author Karl Tauber
   */
  public class FlatViewportUI
  	extends BasicViewportUI
  {
  	private static ComponentUI instance;
  
  	public static ComponentUI createUI( JComponent c ) {
  		if( instance == null )
  			instance = new FlatViewportUI();
  		return instance;
  	}
  
  	@Override
  	public void update( Graphics g, JComponent c ) {
  		Component view = ((JViewport)c).getView();
  		if( c.isOpaque() && view instanceof JTable ) {
  			// paint viewport background in same color as table background
  			g.setColor( view.getBackground() );
  			g.fillRect( 0, 0, c.getWidth(), c.getHeight() );
  
  			paint( g, c );
  		} else
  			super.update( g, c );
  	}
  }
  