/* ========================================================================
* JCommon : a free general purpose class library for the Java(tm) platform
* ========================================================================
*
* (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jcommon/index.html
*
* This library is free software; you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Foundation;
* either version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* --------------------------------
* SortableTableHeaderListener.java
* --------------------------------
* (C) Copyright 2000-2004, by Nabuo Tamemasa and Contributors.
*
* Original Author: Nabuo Tamemasa;
* Contributor(s): David Gilbert (for Object Refinery Limited);
*
* $Id: SortableTableHeaderListener.java,v 1.1 2004/07/15 15:09:43 mungady Exp $
*
* Changes (from 26-Oct-2001)
* --------------------------
* 26-Oct-2001 : Changed package to com.jrefinery.ui.*;
* 14-Oct-2002 : Fixed errors reported by Checkstyle (DG);
*
*/
package org.jfree.ui;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import javax.swing.table.JTableHeader;
/**
* Captures mouse clicks on a table header, with the intention of triggering a sort. Adapted from
* code by Nabuo Tamemasa posted on http://www.codeguru.com.
*
* @author Nabuo Tamemasa
*/
public class SortableTableHeaderListener implements MouseListener, MouseMotionListener {
/** A reference to the table model. */
private SortableTableModel model;
/** The header renderer. */
private SortButtonRenderer renderer;
/** The index of the column that is sorted - used to determine the state of the renderer. */
private int sortColumnIndex;
/**
* Standard constructor.
*
* @param model the model.
* @param renderer the renderer.
*/
public SortableTableHeaderListener(final SortableTableModel model,
final SortButtonRenderer renderer) {
this.model = model;
this.renderer = renderer;
}
/**
* Sets the table model for the listener.
*
* @param model the model.
*/
public void setTableModel(final SortableTableModel model) {
this.model = model;
}
/**
* Handle a mouse press event - if the user is NOT resizing a column and NOT dragging a column
* then give visual feedback that the column header has been pressed.
*
* @param e the mouse event.
*/
public void mousePressed(final MouseEvent e) {
final JTableHeader header = (JTableHeader) e.getComponent();
if (header.getResizingColumn() == null) { // resizing takes precedence over sorting
if (header.getDraggedDistance() < 1) { // dragging also takes precedence over sorting
final int columnIndex = header.columnAtPoint(e.getPoint());
final int modelColumnIndex
= header.getTable().convertColumnIndexToModel(columnIndex);
if (this.model.isSortable(modelColumnIndex)) {
this.sortColumnIndex = header.getTable().convertColumnIndexToModel(columnIndex);
this.renderer.setPressedColumn(this.sortColumnIndex);
header.repaint();
if (header.getTable().isEditing()) {
header.getTable().getCellEditor().stopCellEditing();
}
}
else {
this.sortColumnIndex = -1;
}
}
}
}
/**
* If the user is dragging or resizing, then we clear the sort column.
*
* @param e the mouse event.
*/
public void mouseDragged(final MouseEvent e) {
final JTableHeader header = (JTableHeader) e.getComponent();
if ((header.getDraggedDistance() > 0) || (header.getResizingColumn() != null)) {
this.renderer.setPressedColumn(-1);
this.sortColumnIndex = -1;
}
}
/**
* This event is ignored (not required).
*
* @param e the mouse event.
*/
public void mouseEntered(final MouseEvent e) {
// not required
}
/**
* This event is ignored (not required).
*
* @param e the mouse event.
*/
public void mouseClicked(final MouseEvent e) {
// not required
}
/**
* This event is ignored (not required).
*
* @param e the mouse event.
*/
public void mouseMoved(final MouseEvent e) {
// not required
}
/**
* This event is ignored (not required).
*
* @param e the mouse event.
*/
public void mouseExited(final MouseEvent e) {
// not required
}
/**
* When the user releases the mouse button, we attempt to sort the table.
*
* @param e the mouse event.
*/
public void mouseReleased(final MouseEvent e) {
final JTableHeader header = (JTableHeader) e.getComponent();
if (header.getResizingColumn() == null) { // resizing takes precedence over sorting
if (this.sortColumnIndex != -1) {
final SortableTableModel model = (SortableTableModel) header.getTable().getModel();
final boolean ascending = !model.getAscending();
model.setAscending(ascending);
model.sortByColumn(this.sortColumnIndex, ascending);
this.renderer.setPressedColumn(-1); // clear
header.repaint();
}
}
}
}