content: /*******************************************************************************
   * Copyright (c) 2000, 2007 IBM Corporation and others.
   * All rights reserved. This program and the accompanying materials
   * are made available under the terms of the Eclipse Public License v1.0
   * which accompanies this distribution, and is available at
   * http://www.eclipse.org/legal/epl-v10.html
   *
   * Contributors:
   *     IBM Corporation - initial API and implementation
   *******************************************************************************/
  package org.eclipse.wst.jsdt.internal.ui.preferences;
  
  import org.eclipse.swt.SWT;
  import org.eclipse.swt.custom.Bullet;
  import org.eclipse.swt.custom.StyleRange;
  import org.eclipse.swt.custom.StyledText;
  import org.eclipse.swt.graphics.Color;
  import org.eclipse.swt.graphics.GlyphMetrics;
  import org.eclipse.swt.layout.GridData;
  import org.eclipse.swt.widgets.Composite;
  import org.eclipse.swt.widgets.Control;
  import org.eclipse.swt.widgets.Display;
  
  /**
   * Each line of the given text is preceded by a bullet.
   */
  public class BulletListBlock {
  
  	private StyledText fStyledText;
  	private boolean fEnabled;
  	private String fText;
  	
  	public BulletListBlock() {
  		fEnabled= true;
  		fText= ""; //$NON-NLS-1$
  	}
  
  	public Control createControl(Composite parent) {
  		fStyledText= new StyledText(parent, SWT.FLAT | SWT.BORDER | SWT.READ_ONLY);
  		
  		final GridData data= new GridData(GridData.FILL_HORIZONTAL | GridData.FILL_VERTICAL);
  		fStyledText.setLayoutData(data);
  		configureStyledText(fText, fEnabled);
  		
  		return fStyledText;
  	}
  
  	public void setText(String text) {
  		fText= text;
  		configureStyledText(fText, fEnabled);
  	}
  	
  	public void setEnabled(boolean enabled) {
  		fEnabled= enabled;
  		configureStyledText(fText, fEnabled);
  	}
  
  	private void configureStyledText(String text, boolean enabled) {
  		if (fStyledText == null)
  			return;
  		
  		fStyledText.setText(text);
  		int count= fStyledText.getCharCount();
  		if (count == 0)
  			return;
  		
  		Color foreground= enabled ? null : Display.getDefault().getSystemColor(SWT.COLOR_DARK_GRAY);
  
  		fStyledText.setStyleRange(new StyleRange(0, count, foreground, null));
  					
  		StyleRange styleRange= new StyleRange(0, count, foreground, null);
  		styleRange.metrics= new GlyphMetrics(0, 0, 20);
  		fStyledText.setLineBullet(0, fStyledText.getLineCount(), new Bullet(styleRange));	
  		
  		fStyledText.setEnabled(enabled);
  	}
  }
  