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.icons;
  
  import java.awt.BasicStroke;
  import java.awt.Color;
  import java.awt.Component;
  import java.awt.Graphics2D;
  import java.awt.geom.Path2D;
  import javax.swing.JMenu;
  import javax.swing.UIManager;
  import themeengine.include.com.formdev.flatlaf.ui.FlatUIUtils;
  
  /**
   * "arrow" icon for {@link javax.swing.JMenu}.
   *
   * @uiDefault Component.arrowType				String	triangle (default) or chevron
   * @uiDefault Menu.icon.arrowColor				Color
   * @uiDefault Menu.icon.disabledArrowColor		Color
   * @uiDefault Menu.selectionForeground			Color
   * @uiDefault MenuItem.selectionType			String
   *
   * @author Karl Tauber
   */
  public class FlatMenuArrowIcon
  	extends FlatAbstractIcon
  {
  	protected final boolean chevron = "chevron".equals( UIManager.getString( "Component.arrowType" ) );
  	protected final Color arrowColor = UIManager.getColor( "Menu.icon.arrowColor" );
  	protected final Color disabledArrowColor = UIManager.getColor( "Menu.icon.disabledArrowColor" );
  	protected final Color selectionForeground = UIManager.getColor( "Menu.selectionForeground" );
  
  	public FlatMenuArrowIcon() {
  		super( 6, 10, null );
  	}
  
  	@Override
  	protected void paintIcon( Component c, Graphics2D g ) {
  		if( !c.getComponentOrientation().isLeftToRight() )
  			g.rotate( Math.toRadians( 180 ), width / 2., height / 2. );
  
  		g.setColor( getArrowColor( c ) );
  		if( chevron ) {
  			// chevron arrow
  			Path2D path = FlatUIUtils.createPath( false, 1,1, 5,5, 1,9 );
  			g.setStroke( new BasicStroke( 1f ) );
  			g.draw( path );
  		} else {
  			// triangle arrow
  			g.fill( FlatUIUtils.createPath( 0,0.5, 5,5, 0,9.5 ) );
  		}
  	}
  
  	protected Color getArrowColor( Component c ) {
  		if( c instanceof JMenu && ((JMenu)c).isSelected() && !isUnderlineSelection() )
  			return selectionForeground;
  
  		return c.isEnabled() ? arrowColor : disabledArrowColor;
  	}
  
  	protected boolean isUnderlineSelection() {
  		// not storing value of "MenuItem.selectionType" in class to allow changing at runtime
  		return "underline".equals( UIManager.getString( "MenuItem.selectionType" ) );
  	}
  }
  