pushableheaderexample.java

来自「tame,扩展了好多SWing组件:JTable」· Java 代码 · 共 102 行

/* (swing1.1) */
package tame.examples;

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Insets;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumnModel;

/**
@author Nobuo Tamemasa
@version 1.0 02/25/99
*/
public class PushableHeaderExample extends JPanel {

  public PushableHeaderExample(){
    setLayout(new BorderLayout());
    String[] headerStr = {"Push","me","here"};

    DefaultTableModel dm = new DefaultTableModel(headerStr, 4);
    JTable table = new JTable(dm);
    ButtonHeaderRenderer renderer = new ButtonHeaderRenderer();
    TableColumnModel model = table.getColumnModel();
    int n = headerStr.length;
    for (int i=0;i<n;i++) {
      model.getColumn(i).setHeaderRenderer(renderer);
    }

    JTableHeader header = table.getTableHeader();
    header.addMouseListener(new HeaderListener(header,renderer));
    JScrollPane pane = new JScrollPane(table);
    add(pane, BorderLayout.CENTER);
  }

  public static void main(String[] args) {
    JFrame f= new JFrame("PushableHeaderTable Example");
    f.getContentPane().add(new PushableHeaderExample(), BorderLayout.CENTER);
    f.setSize(400, 100);
    f.setVisible(true);
    f.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {System.exit(0);}
    });
  }

  class HeaderListener extends MouseAdapter {
    JTableHeader   header;
    ButtonHeaderRenderer renderer;

    HeaderListener(JTableHeader header,ButtonHeaderRenderer renderer) {
      this.header   = header;
      this.renderer = renderer;
    }

    public void mousePressed(MouseEvent e) {
      int col = header.columnAtPoint(e.getPoint());
      renderer.setPressedColumn(col);
      header.repaint();

      System.out.println("Ouch! " + col);
    }

    public void mouseReleased(MouseEvent e) {
      int col = header.columnAtPoint(e.getPoint());
      renderer.setPressedColumn(-1);                // clear
      header.repaint();
    }
  }

  class ButtonHeaderRenderer extends JButton implements TableCellRenderer {
    int pushedColumn;

    public ButtonHeaderRenderer() {
      pushedColumn   = -1;
      setMargin(new Insets(0,0,0,0));
    }

    public Component getTableCellRendererComponent(JTable table, Object value,
                   boolean isSelected, boolean hasFocus, int row, int column) {
      setText((value ==null) ? "" : value.toString());
      boolean isPressed = (column == pushedColumn);
      getModel().setPressed(isPressed);
      getModel().setArmed(isPressed);
      return this;
    }

    public void setPressedColumn(int col) {
      pushedColumn = col;
    }
  }
}