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请教：如何实现在表格中显示不同位置、不同长度、不同颜色的Label?

stevendu

发贴: 230
积分: 22

于 2003-07-02 00:54

我试过setDefaultRenderer、getTableCellRendererComponent之类的方法，只能颜色不同，我该怎么办？下面是我的代码：

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.*;
import javax.swing.border.Border;
import javax.swing.SwingUtilities;

import javax.swing.text.*;
import java.awt.Toolkit;
import java.text.NumberFormat;
import java.text.ParseException;
import java.util.Locale;

public class SimpleTableDemo extends JFrame {
  class DataModel extends AbstractTableModel {
    Object[][] tableData = null;
    String[] columnNames = null;

    public DataModel(Object[][] data, String[] colNames) {
      tableData = data;
      columnNames = colNames;
    }

    public int getColumnCount() {
      return tableData[0].length;
    }

    public int getRowCount() {
      return tableData.length;
    }

    public Object getValueAt( int row, int col ) {
      return tableData[row][col];
    }

    public void setValueAt( Object val, int row, int col ) {
      tableData[row][col] = val;
      fireTableDataChanged();
    }

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

    /*
    * JTable uses this method to determine the default renderer/
    * editor for each cell. If we didn't implement this method,
    * then the last column would contain text ("true"/"false"),
    * rather than a check box.
    */
    public Class getColumnClass(int c) {
      return getValueAt(0, c).getClass();
    }

  }//DataModel end

  public SimpleTableDemo() {
    final String[] colNames =
      {"First Name", "Favorite Color","Call Flow","Sport","# of Years","Vegetarian"};
    final Object[][] data = {
      {"Mary", new Color(153, 0, 153),new Bar(2,5,2,5,Color.black),"Snowboarding", new Integer(5), new Boolean(false)},
      {"Alison", new Color(51, 51, 153),new Bar(2,20,2,35,Color.red),"Rowing", new Integer(3), new Boolean(true)},
      {"Kathy", new Color(51, 102, 51),new Bar(2,35,2,50,Color.green),"Chasing toddlers", new Integer(2), new Boolean(false)},
      {"Mark", Color.blue,new Bar(2,50,2,75,Color.blue),"Speed reading", new Integer(20), new Boolean(true)},
      {"Philip", Color.pink,new Bar(2,75,2,95,Color.pink),"Pool", new Integer(7), new Boolean(false)}
    };

     final JTable table = new JTable( new DataModel( data, colNames ) );
    table.setPreferredScrollableViewportSize(new Dimension(600, 200));

    setUpBarRenderer(table);
    setUpColorRenderer(table);
//     setUpColorEditor(table);
    setUpIntegerEditor(table);

    TableColumn column = null;
    column = table.getColumnModel().getColumn(0);
    column.setPreferredWidth(50);
    column = table.getColumnModel().getColumn(1);
    column.setPreferredWidth(50);
    column = table.getColumnModel().getColumn(2);
    column.setPreferredWidth(100);
    column = table.getColumnModel().getColumn(3);
    column.setPreferredWidth(80);
    column = table.getColumnModel().getColumn(4);
    column.setPreferredWidth(50);
    column = table.getColumnModel().getColumn(5);
    column.setPreferredWidth(50);

/*

    TableColumn sportColumn = table.getColumnModel().getColumn(0);
    JComboBox combo = new JComboBox();
    combo.addItem("Yes");
    combo.addItem("No");
    sportColumn.setCellEditor( new DefaultCellEditor( combo ) );

    sportColumn = table.getColumnModel().getColumn(1);
    JLabel label = new JLabel("Label1");
    sportColumn.setCellEditor( new DefaultCellEditor( label ) );

    sportColumn = table.getColumnModel().getColumn(2);
    JCheckBox check = new JCheckBox();
    sportColumn.setCellEditor( new DefaultCellEditor( check ) );

    sportColumn = table.getColumnModel().getColumn(3);
    JButton button = new JButton("Button1");
    sportColumn.setCellEditor( new DefaultCellEditor( button ) );
*/
    //Create the scroll pane and add the table to it.
    JScrollPane scrollPane = new JScrollPane(table);

    //Add the scroll pane to this window.
    getContentPane().add(scrollPane, BorderLayout.CENTER);

    addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
       System.exit(0);
      }
    });
  }

  class Bar extends JLabel {
    int top, left, bottom, right;
    Color color;
    public Bar( int top, int left, int bottom, int right, Color color ) {
      this.top = top;
      this.left = left;
      this.bottom = bottom;
      this.right = right;
      this.color = color;
    }
  }

  class BarRenderer extends JLabel implements TableCellRenderer {
    Border unselectedBorder = null;
    Border selectedBorder = null;
    boolean isBordered = true;
    public BarRenderer(boolean isBordered) {
      super();
      this.isBordered = isBordered;
      setOpaque(true);
    }
    public Component getTableCellRendererComponent( JTable table, Object bar, boolean isSelected, boolean hasFocus,int row, int column) {
      Bar b = (Bar)bar;
      setBackground(b.color);
      if (isBordered) {
      if (isSelected) {
        if (selectedBorder == null) {

          selectedBorder = BorderFactory.createMatteBorder(b.top,b.left,b.bottom,b.right,table.getSelectionBackground());
        }
        setBorder(selectedBorder);
      } else {
        if (unselectedBorder == null) {
          unselectedBorder = BorderFactory.createMatteBorder(b.top,b.left,b.bottom,b.right,table.getBackground());
        }
        setBorder(unselectedBorder);
      }
      }
      return this;
    }
  }

  private void setUpBarRenderer( JTable table ) {
    table.setDefaultRenderer(Bar.class, new BarRenderer(true));
  }

  class ColorRenderer extends JLabel implements TableCellRenderer {
    Border unselectedBorder = null;
    Border selectedBorder = null;
    boolean isBordered = true;

    public ColorRenderer(boolean isBordered) {
      super();
      this.isBordered = isBordered;
      setOpaque(true); //MUST do this for background to show up.
    }

    public Component getTableCellRendererComponent( JTable table, Object color, boolean isSelected, boolean hasFocus,int row, int column) {
      setBackground((Color)color);
      if (isBordered) {
      if (isSelected) {
        if (selectedBorder == null) {
          selectedBorder = BorderFactory.createMatteBorder(2,5,2,5,table.getSelectionBackground());
        }
        setBorder(selectedBorder);
      } else {
        if (unselectedBorder == null) {
          unselectedBorder = BorderFactory.createMatteBorder(2,5,2,5,table.getBackground());
        }
        setBorder(unselectedBorder);
      }
      }
      return this;
    }
  }

  private void setUpColorRenderer(JTable table) {
    table.setDefaultRenderer(Color.class,new ColorRenderer(true));
  }

  //Set up the editor for the Color cells.
   private void setUpColorEditor(JTable table) {
    //First, set up the button that brings up the dialog.
    final JButton button = new JButton("") {
      public void setText(String s) {
      //Button never shows text -- only color.
      }
    };
    button.setBackground(Color.white);
    button.setBorderPainted(false);
    button.setMargin(new Insets(0,0,0,0));

     //Now create an editor to encapsulate the button, and
    //set it up as the editor for all Color cells.
    final ColorEditor colorEditor = new ColorEditor(button);
    table.setDefaultEditor(Color.class, colorEditor);

    //Set up the dialog that the button brings up.
    final JColorChooser colorChooser = new JColorChooser();
    ActionListener okListener = new ActionListener() {
      public void actionPerformed(ActionEvent e) {
      colorEditor.currentColor = colorChooser.getColor();
      }
    };
    final JDialog dialog = JColorChooser.createDialog(button,"Pick a Color",true,colorChooser,okListener,null); //XXXDoublecheck this is OK

    //Here's the code that brings up the dialog.
    button.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
      button.setBackground(colorEditor.currentColor);
      colorChooser.setColor(colorEditor.currentColor);
      //Without the following line, the dialog comes up
      //in the middle of the screen.
      //dialog.setLocationRelativeTo(button);
      dialog.show();
      }
    });
  }

  /*
  * The editor button that brings up the dialog.
  * We extend DefaultCellEditor for convenience,
  * even though it mean we have to create a dummy
  * check box. Another approach would be to copy
  * the implementation of TableCellEditor methods
  * from the source code for DefaultCellEditor.
  */
  class ColorEditor extends DefaultCellEditor {
       Color currentColor = null;

     public ColorEditor(JButton b) {
    super(new JCheckBox());   //Unfortunately, the constructor
           //expects a check box, combo box,
         //or text field.
      editorComponent = b;
       setClickCountToStart(1);   //This is usually 1 or 2.

       //Must do this so that editing stops when appropriate.
       b.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
        fireEditingStopped();
      }
      });
     }

     protected void fireEditingStopped() {
      super.fireEditingStopped();
     }

     public Object getCellEditorValue() {
      return currentColor;
     }

     public Component getTableCellEditorComponent(JTable table, Object value,boolean isSelected,int row,int column) {
      ((JButton)editorComponent).setText(value.toString());
      currentColor = (Color)value;
       return editorComponent;
    }
  }

  private void setUpIntegerEditor(JTable table) {
    //Set up the editor for the integer cells.
    final WholeNumberField integerField = new WholeNumberField(0, 5);
    integerField.setHorizontalAlignment(WholeNumberField.RIGHT);

    DefaultCellEditor integerEditor = new DefaultCellEditor(integerField) {
    //Override DefaultCellEditor's getCellEditorValue method
    //to return an Integer, not a String:
    public Object getCellEditorValue() {
      return new Integer(integerField.getValue());
    }
    };
    table.setDefaultEditor(Integer.class, integerEditor);
  }

  class WholeNumberField extends JTextField {
    private Toolkit toolkit;
    private NumberFormat integerFormatter;

    public WholeNumberField(int value, int columns) {
      super(columns);
      toolkit = Toolkit.getDefaultToolkit();
      integerFormatter = NumberFormat.getNumberInstance(Locale.US);
      integerFormatter.setParseIntegerOnly(true);
      setValue(value);
    }

    public int getValue() {
      int retVal = 0;
      try {
        retVal = integerFormatter.parse(getText()).intValue();
      } catch (ParseException e) {
        // This should never happen because insertString allows
        // only properly formatted data to get in the field.
        toolkit.beep();
      }
      return retVal;
    }

    public void setValue(int value) {
      setText(integerFormatter.format(value));
    }

    protected Document createDefaultModel() {
      return new WholeNumberDocument();
    }

    protected class WholeNumberDocument extends PlainDocument {
      public void insertString(int offs, String str,AttributeSet a) throws BadLocationException {
        char[] source = str.toCharArray();
        char[] result = new char[source.length];
        int j = 0;

        for (int i = 0; i < result.length; i++) {
        if (Character.isDigit(source[i]))
           result[j++] = source[i];
        else {
          toolkit.beep();
          System.err.println("insertString: " + source[i]);
        }
        }
        super.insertString(offs, new String(result, 0, j), a);
      }
    }
  }

  public static void main(String[] args) {
    SimpleTableDemo frame = new SimpleTableDemo();
     frame.pack();
    frame.setVisible(true);
  }
}

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话题树型展开

人气	标题	作者	字数	发贴时间
7300	请教：如何实现在表格中显示不同位置、不同长度、不同颜色的Label?	stevendu	13616	2003-07-02 00:54
5765	Re:请教：如何实现在表格中显示不同位置、不同长度、不同颜色的Label?	guru	13161	2003-07-02 06:23
5594	Re:请教：如何实现在表格中显示不同位置、不同长度、不同颜色的Label?	stevendu	22	2003-07-02 10:18
5604	Re:请教：如何实现在表格中显示不同位置、不同长度、不同颜色的Label?	stevendu	17	2003-07-02 16:01
5610	Re:请教：如何实现在表格中显示不同位置、不同长度、不同颜色的Label?	guru	167	2003-07-02 21:24
5680	Re:请教：如何实现在表格中显示不同位置、不同长度、不同颜色的Label?	stevendu	72	2003-07-03 15:23
5644	Re:请教：如何实现在表格中显示不同位置、不同长度、不同颜色的Label?	stevendu	147	2003-07-04 11:09
5543	Re:请教：如何实现在表格中显示不同位置、不同长度、不同颜色的Label?	stevendu	33	2003-07-04 14:57
5717	Re:请教：如何实现在表格中显示不同位置、不同长度、不同颜色的Label?	guru	115	2003-07-04 23:02

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