无法在JFace TableViewerColumn中换行文本

Question

当宽度超过指定限制时，无法在表格单元格内换行文本。

代码：

public static void main(String[] args) {

    List<TableData> list = Collections.synchronizedList(new ArrayList<TableData>());
    list.add(new TableData("Jack Hodgins", 24) );
    list.add(new TableData("This is just aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
            + "\n" + "hugeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee"
            + "\n" + "messsageeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee"
            + "\n" + "to checkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk"
            + "\n" + "wrap functionalityyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy", 50));

    Display display = new Display();
    Shell shell = new Shell(display);

    shell.setText("Table Viewer Column");
    shell.setSize(800, 1500);

    TableViewer viewer = new TableViewer(shell, SWT.FILL | SWT.MULTI |  SWT.H_SCROLL |  SWT.V_SCROLL |  SWT.FULL_SELECTION | SWT.BORDER);

    Table table = viewer.getTable();
    table.setHeaderVisible(true);
    table.setLinesVisible(true);
    table.setSize(1000, 1500);
    table.setLayout(new TableLayout());

    /** Column for Name */
    TableViewerColumn columnName = new TableViewerColumn(viewer, SWT.MULTI | SWT.WRAP);
    columnName.getColumn().setWidth(250);       
    columnName.getColumn().setText("Name");
    columnName.setLabelProvider(new ColumnLabelProvider() {
        @Override
        public void update(ViewerCell cell)
        {
            Object element = cell.getElement();
            if (element instanceof TableData)
            {
                TableData obj = (TableData) element;
                cell.setText(obj.getName());

            }
        }
    });

    /** Column for Age */
    TableViewerColumn columnAge = new TableViewerColumn(viewer, SWT.NONE);
    columnAge.getColumn().setWidth(100);    
    columnAge.getColumn().setText("Age");
    columnAge.setLabelProvider(new ColumnLabelProvider() {
        @Override
        public void update(ViewerCell cell)
        {
            Object element = cell.getElement();
            if (element instanceof TableData)
            {
                TableData obj = (TableData) element;
                cell.setText(String.valueOf(obj.getAge()) );

            }
        }
    });

    viewer.setContentProvider(ArrayContentProvider.getInstance());
    viewer.setInput(list);
    viewer.refresh();

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

}

public static class TableData
{
    String name;
    int age;

    public TableData(String name, int age)
    {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }


}



}

我查看了stackoverflow的其他链接-

jface tableviewer http://git.eclipse.org/c/platform/eclipse.platform.swt.git/tree/examples/org.eclipse.swt.snippets/src/org/org/c/platform/eclipse.platform.ui.git/tree/expples/org.eclipse/swt/snippets/snippets231.java http://git.eclipse.org/c/platform/eclipse.platform.jface.snippets/jeclipse

仍然无法找到解决这个问题的办法。好心帮忙。

Answer 1

此所有者绘制标签提供程序设置为columnname的标签提供程序，显示在换行处拆分的多行。但所有行都有最深行的大小。

  private static class NameLabelProvider extends OwnerDrawLabelProvider
  {
    private static final int TEXT_MARGIN = 3;

    @Override
    protected void erase(final Event event, final Object element)
    {
      event.detail &= ~SWT.FOREGROUND;
    }

    @Override
    protected void measure(final Event event, final Object element)
    {
      final TableData data = (TableData)element;
      final String text = data.getName();
      final Point size = event.gc.textExtent(text);
      event.width = size.x + 2 * TEXT_MARGIN;
      event.height = Math.max(event.height, size.y + TEXT_MARGIN);
    }

    @Override
    protected void paint(final Event event, final Object element)
    {
      final TableData data = (TableData)element;
      final String text = data.getName();
      event.gc.drawText(text, event.x + TEXT_MARGIN, event.y, true);
    }
  }