coloreditor.java

一个用java开发界面的程序集(jfc核心编程)

package JFCBook.Chapter11.jdk13;

import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;

public class ColorEditor extends AbstractCellEditor
					implements TableCellEditor, Runnable {
	public ColorEditor() {
		editorComponent = new JLabel("Editing...");
		createDialog();
	}

	// These methods implement the TableCellEditor interface
	public Component getTableCellEditorComponent(JTable table,
							Object value,
							boolean isSelected,
						   	int row, int column) {       

		if (value instanceof Color) {
			currentColor = (Color)value;
			colorChooser.setColor(currentColor);
		}		

		return editorComponent;
	}

	public Object getCellEditorValue() {
		return currentColor;
	}

	public boolean isCellEditable(EventObject evt) {
		if (evt instanceof MouseEvent) {
			if (((MouseEvent)evt).getClickCount() >= 2) {
				return true;
			}
			return false;
		}
		return true;		// Key events or editCellAt call
	}
		
	public boolean stopCellEditing() {
		currentColor = colorChooser.getColor();
		dismissDialog();
		fireEditingStopped();
		return true;
	}

	public void cancelCellEditing() {
		dismissDialog();
		fireEditingCanceled();
	}

	public void addCellEditorListener(CellEditorListener l) {
		super.addCellEditorListener(l);
		showDialog();
	}

	// These are methods that implement the internals
	// of the editor itself.
	protected void createDialog() {
		if (dialog == null) {
			ActionListener okListener = new ActionListener() {
				public void actionPerformed(ActionEvent evt) {
					showingDialog = false;
					ColorEditor.this.stopCellEditing();
				}
			};
			ActionListener cancelListener = new ActionListener() {
				public void actionPerformed(ActionEvent evt) {
					showingDialog = false;
					ColorEditor.this.cancelCellEditing();
				}
			};
			colorChooser = new JColorChooser();
			dialog = JColorChooser.createDialog(null, "Choose a Color",
							true, colorChooser,
							okListener, cancelListener);
		}
	}

	protected void showDialog() {
		if (showingDialog == false) {
			showingDialog = true;
			SwingUtilities.invokeLater(this);
		}
	}

	protected void dismissDialog() {
		if (showingDialog == true) {
			showingDialog = false;
			dialog.dispose();    
		}
	}

	public void run() {
		dialog.setVisible(true);
	}

	protected JLabel editorComponent;
	protected Color currentColor;
	protected JDialog dialog;
	protected JColorChooser colorChooser;
	protected boolean showingDialog;
}