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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