如何使用swt.TabItem添加关闭按钮？

Question

TabFolder tabFolder = new TabFolder(composite, SWT.CLOSE);      

TabItem tab1 = new TabItem(tabFolder, SWT.CLOSE);
tab1.setText("Tab 1");

TabItem tab2 = new TabItem(tabFolder, SWT.CLOSE);
tab2.setText("Tab 2");

我有一个swt.TabFolder,它上面有一些swt.TabItems.我希望有一个关闭按钮与那些TabItems所以我可以关闭我想要的运行时选项卡.我不想使用CTabFolder或CTabItem

谁能告诉我,我能为此目的做些什么？

public DomainUI(Composite composite, TabFolder newTabFolder, boolean comingFromSelf)
    {       
        boolean itemsDisposed = false;
        TabItem[] itemsOnTabFolder = newTabFolder.getItems();
        String[] namesOfItemsOnTabFolder = new String[itemsOnTabFolder.length];
        if(comingFromSelf) // checking when to dispose other tabs
        {
            if(itemsOnTabFolder.length != 0)
            {
                for(int i=0; i<itemsOnTabFolder.length; i++)
                {
                    namesOfItemsOnTabFolder[i] = itemsOnTabFolder[i].getText();
                    itemsOnTabFolder[i].dispose();
                }
                itemsDisposed = true;
            }
        }
        final Composite compositeInTab = new Composite(newTabFolder, SWT.NONE);
        compositeInTab.setLayout(null);

        // CREATIION OF LABELS AND TEXTFIELDS
        systemCodeLabel = new Label(compositeInTab, 0);
        systemCodeText = new Text(compositeInTab, SWT.BORDER);

        domainNameLabel = new Label(compositeInTab, 0);
        domainNameText = new Text(compositeInTab, SWT.BORDER);

        organizationalUnitLabel = new Label(compositeInTab, 0);
        organizationalUnitText = new Text(compositeInTab, SWT.BORDER);

        organizationNameLabel = new Label(compositeInTab, 0);
        organizationNameText = new Text(compositeInTab, SWT.BORDER);

        systemCodeLabel.setText("System Code");
        domainNameLabel.setText("Domain Name");
        organizationalUnitLabel.setText("Organizational Unit");
        organizationNameLabel.setText("Organization Name");
newTabFolder.addMouseListener(new MouseAdapter() 
        {
            public void mouseUp(MouseEvent arg0)
            {
                TabFolder curFolder = (TabFolder)arg0.widget;
                Point eventLocation = new Point(arg0.x, arg0.y);
                TabItem item = curFolder.getItem(eventLocation);
                if(item == null)
                    return;

                Image image = item.getImage();

                // check if click is on image
                if(        eventLocation.x >= item.getBounds().x + image.getBounds().x && eventLocation.x <= item.getBounds().x + image.getBounds().x + image.getBounds().width
                        && eventLocation.y >= item.getBounds().y + image.getBounds().y && eventLocation.y <= item.getBounds().y + image.getBounds().y + image.getBounds().height)
                {
                    System.out.println("Close tab");
                    item.dispose();
                }
                else
                {
                    System.out.println("Don't close tab");
                }
            }

        });
}

Answer 1

在TabItem不具备此功能(它会忽略SWT.CLOSE你使用的风格).没有其他方式(我知道)比使用CTabItem而不是使用风格SWT.CLOSE.你将不得不更换TabFolder用CTabFolder为好.

有关示例,请参阅此页面或此页面.

或者,如果你不能离开TabItem,你可以x通过使用item.setImage(xImage);并添加一个Listener文件夹来处理"关闭的东西",为每个标签添加一个图像.当然,该x项目将在左侧,而不是右侧......

管理以使其工作.只需img/x.gif用你的close图像替换(测试,你可以使用:) display.getSystemImage(SWT.ICON_ERROR):

public static void main(String[] args) {
    Display display = Display.getDefault();
    final Shell shell = new Shell(display);
    shell.setLayout(new FillLayout());

    final TabFolder folder = new TabFolder(shell, SWT.NONE);

    TabItem item = new TabItem(folder, SWT.NONE);
    item.setImage(Images.loadImage("img/x.gif"));
    item.setText("Text");

    TabItem item2 = new TabItem(folder, SWT.NONE);
    item2.setImage(Images.loadImage("img/x.gif"));
    item2.setText("Text2");

    folder.addMouseListener(new MouseListener() {

        @Override
        public void mouseUp(MouseEvent arg0) {
            TabFolder curFolder = (TabFolder)arg0.widget;
            Point eventLocation = new Point(arg0.x, arg0.y);
            TabItem item = curFolder.getItem(eventLocation);
            if(item == null)
                return;

            Image image = item.getImage();

            // check if click is on image
            if(        eventLocation.x >= item.getBounds().x + image.getBounds().x && eventLocation.x <= item.getBounds().x + image.getBounds().x + image.getBounds().width
                    && eventLocation.y >= item.getBounds().y + image.getBounds().y && eventLocation.y <= item.getBounds().y + image.getBounds().y + image.getBounds().height)
            {
                System.out.println("Close tab");
                item.dispose();
            }
            else
            {
                System.out.println("Don't close tab");
            }
        }

        @Override
        public void mouseDown(MouseEvent arg0) {
        }

        @Override
        public void mouseDoubleClick(MouseEvent arg0) {
        }
    });

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

结果如下:

关闭前:

关闭后: