• swt TableViewer


    http://blog.163.com/bluefield_wild/blog/static/8182709520085612235336/

    package list;

    import java.util.ArrayList;
    import java.util.List;

    import org.eclipse.jface.dialogs.MessageDialog;
    import org.eclipse.jface.viewers.ColumnPixelData;
    import org.eclipse.jface.viewers.ILabelProviderListener;
    import org.eclipse.jface.viewers.IStructuredContentProvider;
    import org.eclipse.jface.viewers.IStructuredSelection;
    import org.eclipse.jface.viewers.ITableLabelProvider;
    import org.eclipse.jface.viewers.TableLayout;
    import org.eclipse.jface.viewers.TableViewer;
    import org.eclipse.jface.viewers.Viewer;
    import org.eclipse.swt.SWT;
    import org.eclipse.swt.events.SelectionAdapter;
    import org.eclipse.swt.events.SelectionEvent;
    import org.eclipse.swt.graphics.Image;
    import org.eclipse.swt.layout.FillLayout;
    import org.eclipse.swt.layout.GridData;
    import org.eclipse.swt.layout.GridLayout;
    import org.eclipse.swt.layout.RowLayout;
    import org.eclipse.swt.widgets.Button;
    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;
    public class TableViewerDemo{
        // 作为公共变量以便在事件中访问
        TableViewer tableViewer = null;

        public TableViewerDemo() {
            Display display = Display.getDefault();
            Shell shell = new Shell(display);
            shell.setLayout(new GridLayout());
            shell.setText("TableViewerDemo");


            // 按钮面板
            final Composite compControl = new Composite(shell, SWT.NONE);
            compControl.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, true, false));
            final RowLayout rowLayout = new RowLayout();
            rowLayout.justify = true;
            compControl.setLayout(rowLayout);

            // 按钮监听器
            ButtonSelectionListener buttonSelectionListener = new ButtonSelectionListener();
            
            final Button btnCreate = new Button(compControl, SWT.NONE);
            btnCreate.setText("读取");
            btnCreate.addSelectionListener(buttonSelectionListener);

            final Button btnUpdate = new Button(compControl, SWT.NONE);
            btnUpdate.setText("修改");
            btnUpdate.addSelectionListener(buttonSelectionListener);

            final Button btnInsert = new Button(compControl, SWT.NONE);
            btnInsert.setText("增加");
            btnInsert.addSelectionListener(buttonSelectionListener);

            final Button btnDelete = new Button(compControl, SWT.NONE);
            btnDelete.setText("删除");
            btnDelete.addSelectionListener(buttonSelectionListener);

            // 表格面板
            Composite compTableViewer = new Composite(shell, SWT.NONE);
            compTableViewer.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
            compTableViewer.setLayout(new FillLayout());

            // 调用自定义方法生成表格
            tableViewer = createTableViewer(compTableViewer);

            shell.setSize(600, 400);
            shell.open();
            while (!shell.isDisposed()) {
                if (!display.readAndDispatch()) {
                    display.sleep();
                }
            }
            display.dispose();
        }

        /** *//**
         * 按钮监听器
         */
        private class ButtonSelectionListener extends SelectionAdapter {

            public void widgetSelected(SelectionEvent event) {
                String buttonText = null;

                // 取得按钮上的文字
                if (event.getSource() instanceof Button) {
                    buttonText = ((Button) event.getSource()).getText();
                } else {
                    return;
                }

                // 取得用户所选择的第一行, 若没有选择则为null
                IStructuredSelection selection = (IStructuredSelection) tableViewer
                        .getSelection();
                PeopleEntity people =  (PeopleEntity) selection.getFirstElement();
                boolean isSelected = (people != null);

                // 根据按钮上的文字来区分不同的按钮, 并产生相应的事件
                if (buttonText.equals("读取")) {
                    if (isSelected) {
                        String strInfo = "ID: " + people.getId() + " Name: "
                                + people.getName();
                        MessageDialog.openInformation(null, "您所选择的内容:", strInfo);
                    } else {
                        MessageDialog.openInformation(null, "您所选择的内容:", "未选择行!");                    
                    }
                    
                } else if (buttonText.equals("修改")) {
                    if (isSelected) {
                        int id = people.getId();
                        people.setId(id+1);                    
                    } else {
                        MessageDialog.openInformation(null, "您所选择的内容:", "未选择行!");                    
                    }

                } else if (buttonText.equals("增加")) {
                    people = new PeopleEntity(0, "临时用户");
                    ((List)tableViewer.getInput()).add(people);

                } else if (buttonText.equals("删除")) {
                    if (isSelected) {
                        // 先预先移动到下一行
                        Table table = tableViewer.getTable();
                        int i = table.getSelectionIndex(); // 取得当前所选行的序号,如没有则返回-1
                        table.setSelection(i + 1); // 当前选择行移下一行
                        ((List)tableViewer.getInput()).remove(people);        
                    } else {
                        MessageDialog.openInformation(null, "您所选择的内容:", "未选择行!");                    
                    }

                }
                // 刷新表格, 否则没有反应
                tableViewer.refresh();
            }

        }

        /** *//**
         * 生成TableViewer对象
         */
        private TableViewer createTableViewer(Composite compTableViewer) {
            // 第一步: 定义一个TableViewer对象, 并设置相应式样
            TableViewer tableViewer = new TableViewer(compTableViewer, SWT.BORDER
                    | SWT.MULTI | SWT.FULL_SELECTION);

            // 第二步: 通过TableViewer中的Table对其布局
            Table table = tableViewer.getTable();
            table.setHeaderVisible(true);
            table.setLinesVisible(true);
            TableLayout tableLayout = new TableLayout();
            table.setLayout(tableLayout);

            // 第三步: 建立TableViewer中的列
            tableLayout.addColumnData(new ColumnPixelData(80));
            new TableColumn(table, SWT.NONE).setText("ID");
            tableLayout.addColumnData(new ColumnPixelData(80));
            new TableColumn(table, SWT.NONE).setText("Name");

            // 第四步: 设置内容器
            tableViewer.setContentProvider(new TableViewerContentProvider());

            // 第五步: 设置标签器
            tableViewer.setLabelProvider(new TableViewerLabelProvider());

            // 第六步: 用数据充实表格
            List<PeopleEntity> list = new ArrayList<PeopleEntity>();
            list.add(new PeopleEntity(1, "小张"));
            list.add(new PeopleEntity(2, "小王"));
            tableViewer.setInput(list);

            // 返回
            return tableViewer;
        }

        /** *//**
         * 生成表格的内容器
         */
        private class TableViewerContentProvider implements
                IStructuredContentProvider {

            /** *//**
             * 此方法接收输入到表格的数据集合,然后转化成数组返回,重修数组元素就是一个实体类对象,也即一条记录.
             * 参数element就是通过setInput(getPeoples())输入的对象,
             * 因为getPeoples()返回的是一个List,所以参数elements的类型也是List
             */
            public Object[] getElements(Object element) {
                if (element instanceof List) {
                    return ((List) element).toArray();
                } else {
                    return new Object[0];
                }
            }

            public void dispose() {
            }

            public void inputChanged(Viewer arg0, Object arg1, Object arg2) {
            }

        }

        /** *//**
         * 生成表格的标签器
         */
        private class TableViewerLabelProvider implements ITableLabelProvider {
            /** *//**
             * 由此方法决定数据记录在表格的第一列是显示什么文字
             */
            public String getColumnText(Object element, int column) {
                PeopleEntity people = (PeopleEntity) element;
                if (column == 0) {
                    return String.valueOf(people.getId());
                } else if (column == 1) {
                    return people.getName();
                }
                return "";
            }

            public void addListener(ILabelProviderListener arg0){
            }

            public void dispose() {
            }

            public boolean isLabelProperty(Object arg0, String arg1) {
                return false;
            }

            public void removeListener(ILabelProviderListener arg0) {
            }

            public Image getColumnImage(Object arg0, int arg1) {
                return null;
            }

        }

        // 实体类, 这里仅举一个简单的例子, 读者可以根据实际充实
        private class PeopleEntity {
            private int id = 0;

            private String name = null;

            private PeopleEntity(){
            }

            public PeopleEntity(int id, String name) {
                this.id = id;
                this.name = name;
            }

            public void setId(int id) {
                this.id = id;
            }

            public int getId() {
                return id;
            }

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

            public String getName() {
                return name;
            }

        }
        /** *//**
         * @param args
         */
        public static void main(String[] args) {
            new TableViewerDemo();
        }

    }

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  • 原文地址:https://www.cnblogs.com/wshsdlau/p/4758445.html
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