viewersortselectionlistener.java

学生成绩管理系统 eclipse rcp开发 swt技术

package com.zdh.sms.system;

import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.ViewerSorter;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;

//表格的列头单击事件（排序）
public class ViewerSortSelectionListener extends SelectionAdapter {
	private boolean ascFlag = true; // 记录上一次的排序方式，默认为升序
	private ViewerSorter asc, desc;
	private StructuredViewer viewer;

	public ViewerSortSelectionListener(StructuredViewer viewer, ViewerSorter asc, ViewerSorter desc) {
		this.asc = asc;
		this.desc = desc;
		this.viewer = viewer;
	}

	public void widgetSelected(SelectionEvent e) {
		viewer.setSorter(ascFlag ? asc : desc);// ascFlag=true则用升序排序器
		ascFlag = !ascFlag;// 得到下一次排序方式
	}
}