SWT-自动补全实例

package autocomplete;

import org.eclipse.jface.bindings.keys.KeyStroke;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.fieldassist.AutoCompleteField;
import org.eclipse.jface.fieldassist.ComboContentAdapter;
import org.eclipse.jface.fieldassist.ContentProposalAdapter;
import org.eclipse.jface.fieldassist.SimpleContentProposalProvider;
import org.eclipse.jface.fieldassist.TextContentAdapter;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

public class LaunchApp {
    protected Shell shell;

    private Text nameT;
    private Combo cityC;
    private Text remarksT;

    /**
     * Launch the application
     * @param args
     */
    public static void main(String[] args) {
        try {
            LaunchApp window = new LaunchApp();
            window.open();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * Open the window
     */
    public void open() {
        final Display display = Display.getDefault();
        createContents();
        shell.open();
        shell.layout();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
    }

    /**
     * Create contents of the window
     */
    protected void createContents() {
        shell = new Shell();
        final GridLayout gridLayout = new GridLayout();
        gridLayout.numColumns = 2;
        shell.setLayout(gridLayout);
        shell.setSize(226, 122);
        shell.setText("Field Assist");

        final Label nameL = new Label(shell, SWT.NONE);
        nameL.setText("姓名");

        nameT = new Text(shell, SWT.BORDER);
        nameT.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));

        final Label cityL = new Label(shell, SWT.NONE);
        cityL.setText("城市");

        cityC = new Combo(shell, SWT.NONE);
        cityC.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
        
        final Label remarksL = new Label(shell, SWT.NONE);
        remarksL.setText("备注");

        remarksT = new Text(shell, SWT.BORDER);
        remarksT.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
        
        //
        Dialog.applyDialogFont(this.shell);
        
        //
        this.addNameTextFieldAssist();
        this.addCityComboFieldAssist();
        this.addRemarksTextFieldAssist();
    }

    /**
     * 给名称Text添加自动完成功能
     */
    private void addNameTextFieldAssist() {
    	System.out.println("test");
        // 让text可以进行代码提示. 提示内容为: "aa", "BB", "无敌".
        // 注意: 不区分大小写. [如: 输入'b', 内容中会出现"BB"]
    	TextContentAdapter ad = new TextContentAdapter(){
    		
    	};
    	AutoCompleteField au = new AutoCompleteField(nameT,ad , new String[]{"aa", "ac", "ad", "ade", "af", "aq" ,"as", "无敌", "eB", "fB", "gB", "hB", "iB"});
    	au.setProposals(new String[]{"aaa","aab"});
    	
    }
    
    /**
     * 给城市Combo添加自动完成功能
     */
    private void addCityComboFieldAssist() {
        // 让combo可以代码提示. 提示内容为: "BeiJing", "南京", "北京"
        new AutoCompleteField(cityC, new ComboContentAdapter(), new String[] {"BeiJing", "南京", "北京"});
    }
    
    /**
     * 给备注Text添加自动完成功能
     */
    private void addRemarksTextFieldAssist() {
        // 下面使用ContentProposalAdapter,而没有继续使用AutoCompleteField.
        // [去查看代码你会发现:AutoCompleteFiled实现和下面的代码几乎一样. ]
        // AutoCompleteFiled使用的同样就将传入的String[]去构造一个SimpleContentProposalProvider.
        // 但是,AutoCompleteFiled内部的ContentProposalAdapter是无法从外部得到的.
        // 所以,为了能够自定义ContentProposalAdapter, 还必须将AutoCompleteField内部实现的代码在外部再写一遍.
        KeyStroke keyStroke = null; // null 表示不接受快捷键
        try {
            keyStroke = KeyStroke.getInstance("Ctrl+1"); // 在text上按Ctrl+1弹出popup的shell.
        } catch (Exception e) {
            e.printStackTrace();
        }
        ContentProposalAdapter adapter = new ContentProposalAdapter(remarksT, new TextContentAdapter(), new SimpleContentProposalProvider(new String[] {"one", "two", "three"}), keyStroke, new char[] {'.', ' '});
        adapter.setAutoActivationDelay(200); // 延时200ms
        adapter.setPropagateKeys(true); // 如果用户的输入值在内容列表中[比如输入'o',而内容中有'one'],则弹出popup的shell
        adapter.setFilterStyle(ContentProposalAdapter.FILTER_CUMULATIVE); // 用户同步输入的内容也过滤列表[如:用户输入'o',则弹出popup的shell中的内容列表被过滤,其中都是'o'开头的, 再输入一个'n', 则内容列表中被过滤,只有以'on'开头的]
        adapter.setProposalAcceptanceStyle(ContentProposalAdapter.PROPOSAL_INSERT); // 回写插入
//        adapter.setLabelProvider(new LabelProvider() { // 可以不用指定LabelProvider. 如果指定,则不仅仅可以显示Text, 还可以显示Image.
//            @Override
//            public String getText(Object element) {
//                IContentProposal proposal = (IContentProposal) element;
//                return "XX" + proposal.getContent();
//            }
//            @Override
//            public Image getImage(Object element) {
//                return super.getImage(element);
//            }
//        });
        
        // 上面的代码中使用的是SimpleContentProposalProvider, 则会用每个String去构造默认的一个IContentProposal,
        // 具体逻辑见: SimpleContentProposalProvider.makeContentProposal
        
        // 请注意: 可以不用设置setLabelProvider的, 那么将会直接从IContentProposal中取label或content显示.
        // 有labelProvider则从labelProvider得到在内容list中显示的值.
        // 具体逻辑见: ContentProposalAdapter.getString()方法
//        if (labelProvider == null) {
//            return proposal.getLabel() == null ? proposal.getContent() : proposal.getLabel();
//        }
//        return labelProvider.getText(proposal);
        
        // 同样的, 如果你添加了labelProvider, 那么也可以给每个IContentProposal返回Image.
        // 具体逻辑见: ContentProposalAdapter.getImage()方法
        
    }

    
    // ContentProposalAdapter.setAutoActivationDelay 弹出popup的延迟时间
    
    // ContentProposalAdapter.setPropagateKeys(true);
    // 说明: 如果用户敲入的字母在内容列表内时,是否弹出popup内容列表.
    // true 弹出. 用户输入'o'也会弹出popup的shell. 输入'.'也会弹出.
    // false 不弹出. 用户只有输入'.'才弹出popup的shell. 输入'o'等,不弹出.
    
    // ContentProposalAdapter.setFilterStyle(ContentProposalAdapter.FILTER_*);
    // 作用: 在用户敲入字母的时候是否过滤popup弹出的shell里面的内容.
    // ContentProposalAdapter.FILTER_NONE 不过滤. 说明: 下面的内容列表永远不变.
    // ContentProposalAdapter.FILTER_CHARACTER 只用一个输入字符为条件过滤下面的内容列表. 说明:在输入多个字符后,下面的内容列表会被清空.
    // ContentProposalAdapter.FILTER_CUMULATIVE 随着用户输入不停的过滤下面的内容列表. 注意在3.4后被@deprecated了. 说明: 随着用户的输入,下面的内容一直在过滤
    
    // ContentProposalAdapter.setProposalAcceptanceStyle(ContentProposalAdapter.PROPOSAL_*);
    // 说明: 用户从popup的shell中得到的内容怎么回写到控件上.
    // ContentProposalAdapter.PROPOSAL_INSERT 插入.
    // ContentProposalAdapter.PROPOSAL_REPLACE 覆盖.
    // ContentProposalAdapter.PROPOSAL_IGNORE 忽略. 应该叫追加比较合适.

    
    // TextContentAdapter只可以用于Text.
    // ComboContentAdapter只可以用于Combo.
    // 所以, 对于StyledText或Snipper等都需要自定义ContentAdapter. 
    
}

package autocomplete;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.KeyAdapter;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.TraverseEvent;
import org.eclipse.swt.events.TraverseListener;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

public class MyCombo extends Composite {
	private Text text;
	private Menu popupMenu = null;


	//private PopupList list = null;
	public MyCombo(Composite parent1, int style) {
	super(parent1, style);
	init();

	}

	public void init() {
	setLayout(new GridLayout(1, false));

	text = new Text(this, SWT.BORDER);
	initMenu();

	text.addKeyListener(new KeyAdapter() {

	public void keyPressed(KeyEvent e) {


	}

	public void keyReleased(KeyEvent e) {
	e.doit = false;

	int keyCode = e.keyCode;

	Text text = (Text)e.getSource();
	Point p = text.getParent().toDisplay(text.getLocation());
	Point size = text.getSize();
	Rectangle shellRect = new Rectangle(p.x, p.y + size.y, size.x, 0);
	popupMenu.setLocation(shellRect.x,shellRect.y);

	popupMenu.setVisible(true);



	}
	});
	text.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false, 1, 1)); 
	text.addTraverseListener(new TraverseListener(){

	public void keyTraversed(TraverseEvent e) {
	e.doit = false;
	e.detail = SWT.TRAVERSE_NONE;
	}

	});
	}



	private void initMenu(){

	popupMenu = new Menu(text.getShell(),SWT.POP_UP);

	MenuItem newItem = new MenuItem(popupMenu, SWT.CASCADE);
	newItem.setText("New");
	  
	MenuItem refreshItem = new MenuItem(popupMenu, SWT.NONE);
	refreshItem.setText("Refresh");
	MenuItem deleteItem = new MenuItem(popupMenu, SWT.NONE);
	deleteItem.setText("Delete");

	Menu newMenu = new Menu(popupMenu);
	newItem.setMenu(newMenu);

	MenuItem shortcutItem = new MenuItem(newMenu, SWT.NONE);
	shortcutItem.setText("Shortcut");
	MenuItem iconItem = new MenuItem(newMenu, SWT.NONE);
	iconItem.setText("Icon");
	  
	text.setMenu(popupMenu);
	  

	}



	public static void main(String[] args) {
	final Display display = Display.getDefault();   
	  final Shell shell = new Shell();   
	  FillLayout layout = new FillLayout();   
	  layout.marginHeight = 20;   
	  layout.marginWidth = 20;   
	  shell.setLayout(layout);   
	  shell.setSize(201, 183);   
	  shell.setText("组合框演示");   
	  //   

	  shell.open();   

	  final MyCombo combo = new MyCombo(shell, SWT.DROP_DOWN);   
	    
	  combo.setBounds(10, 10, 173, 21);   
	  Menu menu = combo.getMenu();
	  String[] items = new String[4];   
	  for (int i = 0; i < items.length; i++) {   
	  items[i] = "选项" + i;   
	  }   
	  // combo.setItems(items);   
	    
	  /* combo.addKeyListener(new KeyAdapter(){   
	  public void keyPressed(KeyEvent e){   
	  if (e.keyCode==SWT.ARROW_LEFT) {   
	  combo.select(combo.getSelectionIndex()-1);
	    
	  }   
	  if(e.keyCode==SWT.ARROW_RIGHT){   
	  combo.select(combo.getSelectionIndex()+1);   
	  }   
	  }   
	  }); */

	  shell.layout();   
	  while (!shell.isDisposed()) {   
	  if (!display.readAndDispatch())   
	  display.sleep();   
	  }   
	  }   
	}

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