SWT 隔行换色-自动宽高调整

**
 * 创建:ZhengXi 2009-8-4
 */
 package com.infotech.updo.tools;
 import java.text.Collator;
 import java.util.Locale;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.ControlAdapter;
 import org.eclipse.swt.events.ControlEvent;
 import org.eclipse.swt.events.MouseEvent;
 import org.eclipse.swt.events.MouseMoveListener;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.graphics.Point;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Event;
 import org.eclipse.swt.widgets.Listener;
 import org.eclipse.swt.widgets.Table;
 import org.eclipse.swt.widgets.TableColumn;
 import org.eclipse.swt.widgets.TableItem;
 /**
 * SWT表格操作类
* @author 小黄
* 
*/
 public class TableManager implements ITableColorProvider{
 /**
   * 为表列添加排序功能
   * 
  * @param table
   *            表格
   * @param column
   *            表列
   */
public static void addSorter(final Table table, final TableColumn column) {
   column.addListener(SWT.Selection, new Listener() {
    boolean isAscend = true;
    Collator comparator = Collator.getInstance(Locale.getDefault());
    public void handleEvent(Event e) {
     int columnIndex = getColumnIndex(table, column);
     TableItem[] items = table.getItems();
     for (int i = 1; i < items.length; i++) {
      String value2 = items[i].getText(columnIndex);
      for (int j = 0; j < i; j++) {
       String value1 = items[j].getText(columnIndex);
       boolean isLessThan = comparator.compare(value2, 
value1) < 0;
       if ((isAscend && isLessThan)
         || (!isAscend && !isLessThan)) {
        String[] values = getTableItemText(table, 
items[i]);
        Image image = items[i].getImage();
        Object obj = items[i].getData();
        boolean chck = items[i].getChecked();
        items[i].dispose();
        TableItem item = new TableItem(table, 
SWT.NONE, j);
        item.setChecked(chck);
        item.setImage(image);
        item.setText(values);
        item.setData(obj);
        items = table.getItems();
        break;
       }
      }
     }
     table.setSortColumn(column);
     table.setSortDirection((isAscend ? SWT.UP : SWT.DOWN));
     isAscend = !isAscend;
    }
   });
 }
 private static int getColumnIndex(Table table, TableColumn column) {
   TableColumn[] columns = table.getColumns();
   for (int i = 0; i < columns.length; i++) {
    if (columns[i].equals(column))
     return i;
   }
   return -1;
 }
 private static String[] getTableItemText(Table table, TableItem item) {
   int count = table.getColumnCount();
   String[] strs = new String[count];
   for (int i = 0; i < count; i++) {
    strs[i] = item.getText(i);
   }
   return strs;
 }
 /**
   * 列适应表格宽度 第一列固定其他列计算公式:新列的宽度= ( 新表格宽度 - 就表格宽度 ) / 列数 + 
旧列的宽度
   * 
  * @param table
   *            表格
   */
public static void aotuColWidth(final Table table) {
   table.addControlListener(new ControlAdapter() {
    public void controlResized(final ControlEvent e) {
     int oldTableWidth = 0;
     for (int i = 1; i < table.getColumnCount(); i++) {
      oldTableWidth += table.getColumn(i).getWidth();
     }
     for (int i = 1; i < table.getColumnCount(); i++) {
      int oldWidth = table.getColumn(i).getWidth();
      table
        .getColumn(i)
        .setWidth(
          (table.getSize().x
            - 
table.getColumn(0).getWidth() - oldTableWidth)
            / 
(table.getColumnCount() - 1)
            + oldWidth);
     }
    }
   });
 }
 /**
   * 添加光棒以及各行颜色差效果
   * 
  * @param table
   *            table
   */
 public static void rowLight(final Table table) {
   table.addMouseMoveListener(new MouseMoveListener() {
    public void mouseMove(MouseEvent e) {
     TableItem item = table.getItem(new Point(e.x, e.y));
     if (item != null) {
      for (int i = 0; i < table.getItemCount(); i++) {
       if (i % 2 == 0) {
        table.getItem(i).setBackground(
          Display.getCurrent
 ().getSystemColor(
            
 SWT.COLOR_WHITE));
       } else {
        table.getItem(i).setBackground(
          Display.getCurrent
 ().getSystemColor(
            
 SWT.COLOR_WIDGET_LIGHT_SHADOW));
       }
      }
      table.indexOf(item);
      item.setBackground(Display.getCurrent().getSystemColor(
        SWT.COLOR_YELLOW));
     }
    }
   });
 }
 /**
   * 背景颜色，隔行换色
   * 
  * @param table
   *            table
   */
 private Color[] bg = new Color[]
 {new Color(null, 247, 247, 240), new Color(null, 255, 255, 255)};
 private Object current = null;
 private int currentColor = 0;
 public Color getForeground(Object element, int columnIndex)
 {
   return null;
 }
 public Color getBackground(Object element, int columnIndex)
 {
   if (current != element)
   {
    currentColor = 1 - currentColor;
    current = element;
   }
   return bg[currentColor];
 }
 }