tableviewer7.java

Eclipse从入门到精通源代码/第二篇 SWT_JFace篇(6-16章)

/**
 * @作者：陈刚
 * @Email：[e-mail]
 * @Blog：http://blog.csdn.net/glchengang
 */
package jface.tableviewer;

import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.action.ToolBarManager;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.CheckboxCellEditor;
import org.eclipse.jface.viewers.CheckboxTableViewer;
import org.eclipse.jface.viewers.ColumnWeightData;
import org.eclipse.jface.viewers.ComboBoxCellEditor;
import org.eclipse.jface.viewers.DoubleClickEvent;
import org.eclipse.jface.viewers.ICellModifier;
import org.eclipse.jface.viewers.IDoubleClickListener;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.TableLayout;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TextCellEditor;
import org.eclipse.jface.viewers.ViewerSorter;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.ViewForm;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.VerifyEvent;
import org.eclipse.swt.events.VerifyListener;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.widgets.ToolBar;

public class TableViewer7 {
    public static void main(String[] args) {
        TableViewer7 window = new TableViewer7();
        window.open();
    }

    private TableViewer tv; //定义一个表格对象

    private CheckboxTableViewer ctv;

    private ViewerSorter idSorter0 = new MySorter(MySorter.ID);

    private ViewerSorter idSorter1 = new MySorter(-MySorter.ID);

    private ViewerSorter nameSorter0 = new MySorter(MySorter.NAME);

    private ViewerSorter nameSorter1 = new MySorter(-MySorter.NAME);

    //修改表格中名称时出现在下拉框中值
    private String[] names = new String[] { "小张", "小王", "小红" };

    public void open() {
        final Display display = new Display();
        final Shell shell = new Shell();
        shell.setSize(500, 150);
        shell.setText("TableViewer的实例");

        shell.setLayout(new FillLayout());
        /*
         * 布局基座ViewForm
         */
        ViewForm viewForm = new ViewForm(shell, SWT.NONE);
        viewForm.setLayout(new FillLayout());
        /*
         * 创建表格
         */
        createTableViewer(viewForm);
        tv.setContentProvider(new TableViewerContentProvider());
        tv.setLabelProvider(new TableViewerLabelProvider());
        tv.setInput(PeopleFactory.getPeoples());
        addListener();
        /*
         * --------------表格修改功能的设置---------------
         */
        //定义每一列的别名
        tv.setColumnProperties(new String[] { "0", "1", "2", "3", "4" });
        //设置每一列的单元格编辑器CellEditor
        CellEditor[] cellEditor = new CellEditor[5];
        cellEditor[0] = null;
        cellEditor[1] = new ComboBoxCellEditor(tv.getTable(), names, SWT.READ_ONLY);
        cellEditor[2] = new CheckboxCellEditor(tv.getTable());
        cellEditor[3] = new TextCellEditor(tv.getTable());
        cellEditor[4] = null;
        tv.setCellEditors(cellEditor);
        //设置单元格修改方法类MyCellModifier
        tv.setCellModifier(new MyCellModifier());
        ((Text) cellEditor[3].getControl()).addVerifyListener(new VerifyListener() {
            public void verifyText(VerifyEvent e) {
                e.doit = "0123456789".indexOf(e.text) >= 0;
            }
        });
        /*
         * 创建菜单栏
         */
        MyActionGroup actionGroup = new MyActionGroup(tv, ctv);
        actionGroup.fillContextMenu(new MenuManager());
        /*
         * 创建工具栏
         */
        ToolBar toolBar = new ToolBar(viewForm, SWT.FLAT);
        ToolBarManager toolBarManager = new ToolBarManager(toolBar);
        actionGroup.fillActionToolBars(toolBarManager);
        /*
         * 设置表格和工具栏的在布局中的位置
         */
        viewForm.setContent(tv.getControl());
        viewForm.setTopLeft(toolBar);

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

    /**
     * 修改方法类
     */
    private class MyCellModifier implements ICellModifier {
        /**
         * 是否可以修改此单元格。这里设置了任一单元格都可以修改。
         * 
         * @param element
         *            表格记录对象，在这里就是PeopleEntity。
         * @param property
         *            列的别名
         */
        public boolean canModify(Object element, String property) {
            return true;
        }

        /**
         * 由此方法决定，当单击单元格出现CellEditor时应该显示什么值。
         * 
         * @param element
         *            表格记录对象，在这里就是PeopleEntity。
         * @param property
         *            列的别名
         */
        public Object getValue(Object element, String property) {
            PeopleEntity o = (PeopleEntity) element;
            if (property.equals("0")) {
                return "";
            } else if (property.equals("1")) {
                return new Integer(0);
            } else if (property.equals("2")) {
                return o.isSex() ? new Boolean(false) : new Boolean(false);
            } else if (property.equals("3")) {
                return o.getAge() + "";
            } else if (property.equals("4")) {
                return "";
            }
            return "";
        }

        /**
         * 从CellEditor取值得此单元格的值。
         * 
         * @param element
         *            表格记录对象，在这里就是PeopleEntity。
         * @param property
         *            列的别名
         * @param value
         *            修改的新值
         */
        public void modify(Object element, String property, Object value) {
            TableItem tableItem = (TableItem) element;
            PeopleEntity o = (PeopleEntity) tableItem.getData();
            if (property.equals("1")) {
                Integer newValue = (Integer) value;
                String name = names[newValue.intValue()];
                o.setName(name);
            } else if (property.equals("2")) {
                Boolean newValue = (Boolean) value;
                o.setSex(newValue.booleanValue());
            } else if (property.equals("3")) {
                String newValue = (String) value;
                if (newValue.equals(""))
                    return;
                o.setAge(new Integer(newValue).intValue());
            } else {
                return;
            }
            tv.update(o, null);//或 tv.refresh(); 确认并更新修改
        }
    }

    /**
     * 创建表格
     */
    private void createTableViewer(Composite parent) {
        /*
         * 第一步：定义一个TableViewer对象。式样：MULTI可多选、H_SCROLL有水平
         * 滚动条、V_SCROLL有垂直滚动条、BORDER有边框、FULL_SELECTION整行选择
         */
        tv = new TableViewer(parent, SWT.CHECK | SWT.MULTI | SWT.BORDER | SWT.FULL_SELECTION);
        ctv = new CheckboxTableViewer(tv.getTable());
        /*
         * 第二步：通过TableViewer中的Table对其布局
         */
        Table table = tv.getTable();
        table.setHeaderVisible(true); //显示表头
        table.setLinesVisible(true); //显示表格线
        TableLayout tLayout = new TableLayout(); //专用于表格的布局
        table.setLayout(tLayout);
        /*
         * 第三步：建立TableViewer中的列
         */
        //        tLayout.addColumnData(new ColumnWeightData(10));//设置ID列的列宽为10像素
        //        new TableColumn(table, SWT.NONE).setText("ID号");
        //        tLayout.addColumnData(new ColumnWeightData(40));
        //        new TableColumn(table, SWT.NONE).setText("姓名");
        tLayout.addColumnData(new ColumnWeightData(10));//设置ID列的列宽为10像素
        TableColumn col1 = new TableColumn(table, SWT.NONE);
        col1.setText("ID号");
        //列的选择事件
        col1.addSelectionListener(new SelectionAdapter() {
            boolean sortType = true; //sortType记录上一次的排序方式，默认为升序

            public void widgetSelected(SelectionEvent e) {
                //取反。下一次排序方式要和这一次的相反
                sortType = !sortType;
                //sortType为真则排序器用idSorter0（升序）、否则用idSorter1（降序）
                tv.setSorter(sortType ? idSorter0 : idSorter1);
            }
        });
        tLayout.addColumnData(new ColumnWeightData(40));
        TableColumn col2 = new TableColumn(table, SWT.NONE);
        col2.setText("姓名");
        col2.addSelectionListener(new SelectionAdapter() {
            boolean sortType = true;

            public void widgetSelected(SelectionEvent e) {
                sortType = !sortType;
                tv.setSorter(sortType ? nameSorter0 : nameSorter1);
            }
        });

        tLayout.addColumnData(new ColumnWeightData(20));
        new TableColumn(table, SWT.NONE).setText("性别");
        tLayout.addColumnData(new ColumnWeightData(20));
        new TableColumn(table, SWT.NONE).setText("年龄");
        tLayout.addColumnData(new ColumnWeightData(60));
        new TableColumn(table, SWT.NONE).setText("记录建立时间");

    }

    /**
     * 添加监听器
     */
    private void addListener() {
        /*
         * tv的鼠标双击事件监听
         */
        tv.addDoubleClickListener(new IDoubleClickListener() {
            public void doubleClick(DoubleClickEvent event) {
                IStructuredSelection selection = (IStructuredSelection) event.getSelection();
                //得到记录的实体对象（要类型转换）
                PeopleEntity o = (PeopleEntity) selection.getFirstElement();
                //一个弹出提示框
                MessageDialog.openInformation(null, "提示", o.getName());
            }
        });
        /*
         * tv的选择事件（单击）监听
         */
        tv.addSelectionChangedListener(new ISelectionChangedListener() {
            public void selectionChanged(SelectionChangedEvent event) {
                //-------事件处理代码。。。。。（省略）
            }
        });
    }
}