ColorCellEditor.java

/*
 * Copyright 2004-2010 Information & Software Engineering Group (188/1)
 *                     Institute of Software Technology and Interactive Systems
 *                     Vienna University of Technology, Austria
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.ifs.tuwien.ac.at/dm/somtoolbox/license.html
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package at.tuwien.ifs.commons.gui.controls.swing.table;

import java.awt.Color;
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.AbstractCellEditor;
import javax.swing.JButton;
import javax.swing.JColorChooser;
import javax.swing.JDialog;
import javax.swing.JTable;
import javax.swing.table.TableCellEditor;

public class ColorCellEditor extends AbstractCellEditor implements TableCellEditor, ActionListener {
    private static final long serialVersionUID = 1L;

    Color currentColor;

    JButton button;

    JColorChooser colorChooser;

    JDialog dialog;

    protected static final String EDIT = "edit";

    public ColorCellEditor() {
        // Set up the editor (from the table's point of view), which is a button.
        // This button brings up the color chooser dialog, which is the editor from the user's point of view.
        button = new JButton();
        button.setActionCommand(EDIT);
        button.addActionListener(this);
        button.setBorderPainted(false);

        // Set up the dialog that the button brings up.
        colorChooser = new JColorChooser();
        dialog = JColorChooser.createDialog(button, "Pick a Color", true, // modal
                colorChooser, this, // OK button handler
                null); // no CANCEL button handler
    }

    /**
     * Handles events from the editor button and from the dialog's OK button.
     */
    @Override
    public void actionPerformed(ActionEvent e) {
        if (EDIT.equals(e.getActionCommand())) {
            // The user has clicked the cell, so bring up the dialog.
            button.setBackground(currentColor);
            colorChooser.setColor(currentColor);
            dialog.setVisible(true);

            // Make the renderer reappear.
            fireEditingStopped();

        } else { // User pressed dialog's "OK" button.
            currentColor = colorChooser.getColor();
        }
    }

    // Implement the one CellEditor method that AbstractCellEditor doesn't.
    @Override
    public Object getCellEditorValue() {
        return currentColor;
    }

    // Implement the one method defined by TableCellEditor.
    @Override
    public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
        currentColor = (Color) value;
        return button;
    }
}