tableViewer----sort總結 .

1、點擊列標題排序，互不干擾

public class MyViewerComparator extends ViewerComparator {
	private int propertyIndex;
	private static final int DESCENDING = 1;
	private int direction = DESCENDING;

	public MyViewerComparator() {
		this.propertyIndex = 0;
		direction = DESCENDING;
	}

	public int getDirection() {
		return direction == 1 ? SWT.DOWN : SWT.UP;
	}

	public void setColumn(int column) {
		if (column == this.propertyIndex) {
			// Same column as last sort; toggle the direction
			direction = 1 - direction;
		} else {
			// New column; do an ascending sort
			this.propertyIndex = column;
			direction = DESCENDING;
		}
	}

	@Override
	public int compare(Viewer viewer, Object e1, Object e2) {
		Person p1 = (Person) e1;
		Person p2 = (Person) e2;
		int rc = 0;
		switch (propertyIndex) {
		case 0:
			rc = p1.getFirstName().compareTo(p2.getFirstName());
			break;
		case 1:
			rc = p1.getLastName().compareTo(p2.getLastName());
			break;
		default:
			rc = 0;
		}
		// If descending order, flip the direction
		if (direction == DESCENDING) {
			rc = -rc;
		}
		return rc;
	}

}

 

private TableViewerColumn createTableViewerColumn(String title, int bound,
			final int colNumber) {
		final TableViewerColumn viewerColumn = new TableViewerColumn(viewer,
				SWT.NONE);
		final TableColumn column = viewerColumn.getColumn();
		column.setText(title);
		column.setWidth(bound);
		column.setResizable(true);
		column.setMoveable(true);
		column.addSelectionListener(getSelectionAdapter(column, colNumber));   //事件
		return viewerColumn;
	}

	private SelectionAdapter getSelectionAdapter(final TableColumn column,
			final int index) {
		SelectionAdapter selectionAdapter = new SelectionAdapter() {
			@Override
			public void widgetSelected(SelectionEvent e) {
				comparator.setColumn(index);
				int dir = comparator.getDirection();
				viewer.getTable().setSortDirection(dir);
				viewer.getTable().setSortColumn(column);
				viewer.refresh();
			}
		};
		return selectionAdapter;
	}

 

參考：http://www.vogella.de/articles/EclipseJFaceTableAdvanced/article.html

 

2、2列同時排序

點擊第一列標題按鈕，按firstName排序，相等的話按lastName排序

點擊第二列標題按鈕，按lastName排序，相等的話按firstName排序

 

public class FirstNameAndLastNameComparator extends ViewerComparator {
	private int propertyIndex;
	private static final int DESCENDING = 1;
	private int direction = DESCENDING;

	public FirstNameAndLastNameComparator() {
		this.propertyIndex = 0;
		direction = DESCENDING;
	}

	public int getDirection() {
		return direction == 1 ? SWT.DOWN : SWT.UP;
	}

	public void setColumn(int column) {
		if (column == this.propertyIndex) {
			// Same column as last sort; toggle the direction
			direction = 1 - direction;
		} else {
			// New column; do an ascending sort
			this.propertyIndex = column;
			direction = DESCENDING;
		}
	}

	@Override
	public int compare(Viewer viewer, Object e1, Object e2) {
		Indent p1 = (Indent) e1;
		Indent p2 = (Indent) e2;
		int rc = 0;
		switch (propertyIndex) {
		case 0:
			rc = p1.getFirstName().compareTo(p2.getFirstName());
			if(rc==0)
			{
			    rc=p1.getLastName().compareTo(p2.getLastName());
			}
			break;
			
		case 1:
			rc = p1.getLastName().compareTo(p2.getLastName());
			if(rc==0)
			{
				rc=p1.getFirstName().compareTo(p2.getFirstName());
			}
			break;
		
		}
		// If descending order, flip the direction
		if (direction == DESCENDING) {
			rc = -rc;
		}
		return rc;
		
	}