Eclipse Jface MVC 中的多个数据绑定对象

Question

我遇到了一些关于 jFace TableViewer 及其绑定的问题。我正在为 TableViewer 使用以下示例代码：

public class AppPersonViewer extends TableViewer
{
    public Table table;
    
    public AppPersonViewer(Composite parent, int style) 
    {
        super(parent, style);
        table = getTable();
        GridData gridData = new GridData(SWT.FILL, SWT.FILL, true, true);
        table.setLayoutData(gridData);
        createColumns();
        table.setHeaderVisible(true);
        table.setLinesVisible(true);
        setContentProvider(new AppContentProvider());
    }

    private void createColumns()
    {
        String[] titles = { "First Name", "Second Name", "Age", "Country", "Likes SO" };
        int[] bounds = { 150, 150, 100, 150, 100 };

        TableViewerColumn column = createTableViewerColumn(titles[0], bounds[0], 0);
        column.setLabelProvider(new ColumnLabelProvider(){
            public String getText(Object element) {
                if(element instanceof Person)
                    return ((Person)element).getFirst();
                return super.getText(element);
            }
        });

        column = createTableViewerColumn(titles[1], bounds[1], 1);
        column.setLabelProvider(new ColumnLabelProvider(){
            public String getText(Object element) {
                if(element instanceof Person)
                    return ((Person)element).getSecond();
                return super.getText(element);
            }
        });

        column = createTableViewerColumn(titles[2], bounds[2], 2);
        column.setLabelProvider(new ColumnLabelProvider(){
            public String getText(Object element) {
                if(element instanceof Person)
                    return ""+((Person)element).getAge();
                return super.getText(element);
            }
        });

        column = createTableViewerColumn(titles[3], bounds[3], 3);
        column.setLabelProvider(new ColumnLabelProvider(){
            public String getText(Object element) {
                if(element instanceof Person)
                    return ((Person)element).getCountry();
                return super.getText(element);
            }
        });
  
        column = createTableViewerColumn(titles[4], bounds[4], 4);
        column.setLabelProvider(new ColumnLabelProvider(){
            public Image getImage(Object element) {
                    return ((Person)element).getImage();
            }
            
            public String getText(Object element) {
                  return null;  // no string representation, we only want to display the image
                }
            
        });
        
        
    }

    private TableViewerColumn createTableViewerColumn(String header, int width, int idx) 
    {
        TableViewerColumn column = new TableViewerColumn(this, SWT.LEFT, idx);
        column.getColumn().setText(header);
        column.getColumn().setWidth(width);
        column.getColumn().setResizable(true);
        column.getColumn().setMoveable(true);

        return column;
    }
}

此处使用 Person 对象进行数据绑定：

import java.util.Random;

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;

public class Person 
{
    private static final String[]   FIRST = {"Favonius", "Tim", "Brad", "Scott", "Linda"};
    private static final String[]   SECOND = {"Cruise", "Temp", "Abbey", "Adam", "Albert", "Thomas"};
    private static final String[]   COUNTRY = {"India", "USA", "Russia", "UK", "France", "Germany"};
    private static final int[]      AGE = {22, 23, 24, 25, 26, 27, 28, 29, 30};

    private static Random random = new Random(System.currentTimeMillis());

    private String first;
    private String second;
    private String country;
    private String likes;

    private int age;

    public Person(String first, String second, String country, String likes, int age) 
    {
        super();
        this.first = first;
        this.second = second;
        this.country = country;
        this.likes = likes;
        this.age = age;
    }
    public String getFirst() {
        return first;
    }
    public String getSecond() {
        return second;
    }
    public String getCountry() {
        return country;
    }
    public String getLikes() {
        return likes;
    }
    public int getAge() {
        return age;
    }
    public void setLikes(String likes) {
        this.likes = likes;
    }
    
    public Image getImage(){
        return Display.getDefault().getSystemImage(SWT.ICON_ERROR);
    }
    
    public static Person createRandomPerson(){
        return new  Person(FIRST[random.nextInt(FIRST.length)], 
                SECOND[random.nextInt(SECOND.length)], COUNTRY[random.nextInt(COUNTRY.length)], 
                "Y", AGE[random.nextInt(AGE.length)]);
    }
}

此示例仅将一个对象绑定到 TableViewer。但我想将多个对象绑定到 TableViewer。例如，TableViewer 的第 1 列应该包含对象 A 的属性 test，TableViewer 的第 2 列应该包含对象 B 的属性 newTest。

这可能吗？感谢您的帮助。

Answer 1

table 中的每一行都使用您的内容提供商提供的单个对象。

因此，如果您需要来自不同对象的值，您将需要 return 一个包含来自内容提供商的这些对象的复合 class。

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