Question

Hello其他程序员

表一直是我的克星，但是由于stackoverflow，我的大多数问题都解决了。但不是这个，我无法找到解决方案。我想在我的JTable中使用JComboBox并希望有编辑时不仅仅是项目的工具文本，
但是，当不编辑时，还有当前Cell本身的工具提示文本有很多例子说明如何为每个项目设置工具提示并且它们有效，但似乎没有任何例子显示如何为Top＆＃34;事物＆＃34;在JCombBox本身。这里难以描述的是一个sscce。字符串的单元格显示工具提示，ComboBox的单元格不显示任何。

除此之外，如果你有时间，请解释，我实际上做错了什么，以及为什么这是错的。如果您需要进一步的信息，请不要犹豫。

编辑：我进一步减少了我的代码并删除了字符串列的渲染器，它显示了我想要的内容，但我猜你知道。

TestComboBoxRenderer.java

import java.awt.Component;
import javax.swing.JList;
import javax.swing.plaf.basic.BasicComboBoxRenderer;

public class TestComboBoxRenderer extends BasicComboBoxRenderer {

    private static final long serialVersionUID = -8316048934422548198L;

    @Override  
    public Component getListCellRendererComponent(@SuppressWarnings("rawtypes") JList list, Object value,  
            int index, boolean isSelected, boolean cellHasFocus) {  

        // Select the Item specific Tooltip
        if (isSelected) {  
            setBackground(list.getSelectionBackground());  
            setForeground(list.getSelectionForeground());
            // Setting item specific tooltips
            list.setToolTipText(value.toString());   
        } else {  
            setBackground(list.getBackground());  
            setForeground(list.getForeground());

        }
        // These are not working
        // super.setToolTipText("nice try");
        // This also does not work
        // this.setToolTipText("nice try");

        setFont(list.getFont());  
        setText((value == null) ? "" : value.toString());  
        return this;
    }
}

TestWindow.java

import java.awt.BorderLayout;
import java.util.ArrayList;
import javax.swing.*;


public class TestWindow extends JFrame {

    private static final long serialVersionUID = 7058494790322990937L;

    // Nested Enum for the ComboBox
    public enum BoxEnums {
        Itemone, Itemtwo, Itemthree
    }

    @SuppressWarnings("unchecked") // 
    public TestWindow(){
        // GUI Stuff
        setSize(200, 100);
        setLayout(new BorderLayout());
        setTitle("Window");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        ToolTipManager.sharedInstance().setInitialDelay(0);
        ToolTipManager.sharedInstance().setDismissDelay(5000);

        // Construct the table
        JTable table = new JTable();
        JScrollPane tablepanel = new JScrollPane();
        tablepanel.setViewportView(table); // Only Fools add()
        getContentPane().add(tablepanel, BorderLayout.CENTER);
        table.setRowHeight(22);

        // Construct the ComboBox Renderer 
        JComboBox<BoxEnums> cbox = new JComboBox<BoxEnums>(BoxEnums.values());
        TestComboBoxRenderer comboBoxRenderer = new TestComboBoxRenderer();
        cbox.setRenderer(comboBoxRenderer);

        // Construct the tablemodel where a line is an ArrayList<Object> and the
        // table is an ArrayList of line ArrayLists
        TestTableModel model = new TestTableModel();
        ArrayList<ArrayList<Object>> data = new ArrayList<ArrayList<Object>>();
        ArrayList<Object> lineone = new ArrayList<Object>();
        lineone.add("String 1");
        lineone.add(BoxEnums.Itemone);
        data.add(lineone);
        model.setdata(data);
        table.setModel(model);

        // Set the renderer for column 1
        table.getColumnModel().getColumn(1).setCellEditor(new DefaultCellEditor(cbox));

        setVisible(true);

    }

    public static void main(String[] args) {
        new TestWindow();
    }
}

TestTableModel.java

import java.util.ArrayList;
import javax.swing.table.*;

class TestTableModel extends AbstractTableModel {

    private static final long serialVersionUID = 8520572284680167375L;


    // I have a TableModel that does a lot of thing, which are not really
    // needed in this example
    private String[] columnNames = {"A String", "A Combobox"};
    ArrayList<ArrayList<Object>> data = new ArrayList<ArrayList<Object>>();

    public TestTableModel() {
        super();
    }

    // Just change set of data, since in my programm all managment 
    // is done outside 

    public void setdata(ArrayList<ArrayList<Object>> data){
        this.data = data;
    }

    public void setValueAt(Object value, int row, int col) {
        data.get(row).set(col, value);
    }

    public int getColumnCount() {
        return columnNames.length;
    }

    public Object getValueAt(int row, int col) {
        return data.get(row).get(col);
    }

    public Class<?> getColumnClass(int c) {
        return getValueAt(0, c).getClass();
    }

    public int getRowCount() { return data.size(); }

    public String getColumnName(int col) { return columnNames[col]; }

    public boolean isCellEditable(int row, int col) { return true; }

}

在不编辑时，JTable中的JComboBox工具提示，而不仅仅是JComboBox项目

0 个答案: