• 介绍
本文介绍如何自定义一个Eclipse中的工程属性页面。

 
• 扩展点 org.eclipse.ui.propertyPages
[codesyntax lang="xml"]
 
<extension point="org.eclipse.ui.propertyPages">
  <page objectClass="org.eclipse.core.resources.IResource"
    adaptable="true" name="%osgi.imported_packages"
    class="org.suren.osgi.ui.properties.ImportPackagePage"
    id="org.suren.osgi.ui.properties.ImportPackagePage">
  </page>
</extension>
 
[/codesyntax]
实现类很简单，就是使用SWT创建一个页面就好。重点是要获取当前选择的工程，然后显示该工程的信息。下面是例子：
[codesyntax lang="java"]
 
/**
* Copyright © 1998-2015, http://surenpi.com. All Rights Reserved.
*/
package org.suren.osgi.ui.properties;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.TreeSet;

import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.dialogs.PropertyPage;
import org.suren.osgi.util.JavaProjectUtil;

/**
 * @author suren
 * @since jdk1.6
 * 2015年12月8日
 */
public class ImportPackagePage extends PropertyPage {

  @Override
  protected Control createContents(Composite parent) {
    IAdaptable ele = getElement();
    
    IJavaProject javaProject = JavaProjectUtil.getJavaProject(ele);
    
    List<String> importPackages = new ArrayList<String>();
    JavaProjectUtil.findImportPackage(javaProject, importPackages);
    
    Composite contents = new Composite(parent, SWT.NULL);
    contents.setLayout(new FillLayout());
    
    Set<String> packagesSet = new TreeSet<String>();
    for(String pkg : importPackages)
    {
      pkg = pkg.substring(0, pkg.lastIndexOf("."));
      packagesSet.add(pkg);
    }

    StringBuffer buf = new StringBuffer();
    Iterator<String> it = packagesSet.iterator();
    while(it.hasNext())
    {
      String pkg = it.next();
      buf.append("\n").append(pkg);
    }
    if(buf.length() > 0)
    {
      buf.delete(0, 2);
    }
    
    new Text(contents, SWT.MULTI).setText(buf.toString());;
    
    contents.layout(true, true);
    
    return contents;
  }
}
 
[/codesyntax]