/*
* Freeplane - mind map editor
* Copyright (C) 2008 Joerg Mueller, Daniel Polansky, Christian Foltin, Dimitry Polivaev
*
* This file is modified by Dimitry Polivaev in 2008.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.freeplane.view.swing.features.time.mindmapmode.nodelist;
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.swing.Icon;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.SwingConstants;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumnModel;
import javax.swing.table.TableModel;
/**
* TableSorter is a decorator for TableModels; adding sorting functionality to a
* supplied TableModel. TableSorter does not store or copy the data in its
* TableModel; instead it maintains a map from the row indexes of the view to
* the row indexes of the model. As requests are made of the sorter (like
* getValueAt(row, col)) they are passed to the underlying model after the row
* numbers have been translated via the internal mapping array. This way, the
* TableSorter appears to hold another copy of the table with the rows in a
* different order. <p/> TableSorter registers itself as a listener to the
* underlying model, just as the JTable itself would. Events recieved from the
* model are examined, sometimes manipulated (typically widened), and then
* passed on to the TableSorter's listeners (typically the JTable). If a change
* to the model has invalidated the order of TableSorter's rows, a note of this
* is made and the sorter will resort the rows the next time a value is
* requested. <p/> When the tableHeader property is set, either by using the
* setTableHeader() method or the two argument constructor, the table header may
* be used as a complete UI for TableSorter. The default renderer of the
* tableHeader is decorated with a renderer that indicates the sorting status of
* each column. In addition, a mouse listener is installed with the following
* behavior:
* <ul>
* <li>Mouse-click: Clears the sorting status of all other columns and advances
* the sorting status of that column through three values: {NOT_SORTED,
* ASCENDING, DESCENDING} (then back to NOT_SORTED again).
* <li>SHIFT-mouse-click: Clears the sorting status of all other columns and
* cycles the sorting status of the column through the same three values, in the
* opposite order: {NOT_SORTED, DESCENDING, ASCENDING}.
* <li>CONTROL-mouse-click and CONTROL-SHIFT-mouse-click: as above except that
* the changes to the column do not cancel the statuses of columns that are
* already sorting - giving a way to initiate a compound sort.
* </ul>
* <p/> This is a long overdue rewrite of a class of the same name that first
* appeared in the swing table demos in 1997.
*
* @author Philip Milne
* @author Brendon McLean
* @author Dan van Enckevort
* @author Parwinder Sekhon
* @version 2.0 02/27/04
*/
class TableSorter extends AbstractTableModel {
private static class Arrow implements Icon {
final private boolean descending;
final private int priority;
final private int size;
public Arrow(final boolean descending, final int size, final int priority) {
this.descending = descending;
this.size = size;
this.priority = priority;
}
public int getIconHeight() {
return size;
}
public int getIconWidth() {
return size;
}
public void paintIcon(final Component c, final Graphics g, final int x, int y) {
final Color color = c == null ? Color.GRAY : c.getBackground();
final int dx = (int) (size / 2 * Math.pow(0.8, priority));
final int dy = descending ? dx : -dx;
y = y + 5 * size / 6 + (descending ? -dy : 0);
final int shift = descending ? 1 : -1;
g.translate(x, y);
g.setColor(color.darker());
g.drawLine(dx / 2, dy, 0, 0);
g.drawLine(dx / 2, dy + shift, 0, shift);
g.setColor(color.brighter());
g.drawLine(dx / 2, dy, dx, 0);
g.drawLine(dx / 2, dy + shift, dx, shift);
if (descending) {
g.setColor(color.darker().darker());
}
else {
g.setColor(color.brighter().brighter());
}
g.drawLine(dx, 0, 0, 0);
g.setColor(color);
g.translate(-x, -y);
}
}
private static class Directive {
final private int column;
final private int direction;
public Directive(final int column, final int direction) {
this.column = column;
this.direction = direction;
}
}
private class MouseHandler extends MouseAdapter {
@Override
public void mouseClicked(final MouseEvent e) {
final JTableHeader h = (JTableHeader) e.getSource();
final TableColumnModel columnModel = h.getColumnModel();
final int viewColumn = columnModel.getColumnIndexAtX(e.getX());
final int column = columnModel.getColumn(viewColumn).getModelIndex();
if (column != -1) {
int status = getSortingStatus(column);
if (!e.isControlDown()) {
cancelSorting();
}
status = status + (e.isShiftDown() ? -1 : 1);
status = (status + 4) % 3 - 1;
setSortingStatus(column, status);
}
}
}
private class Row implements Comparable<Object> {
final private int modelIndex;
public Row(final int index) {
modelIndex = index;
}
public int compareTo(final Object o) {
final int row1 = modelIndex;
final int row2 = ((Row) o).modelIndex;
for (final Directive directive : sortingColumns) {
final int column = directive.column;
final Object o1 = tableModel.getValueAt(row1, column);
final Object o2 = tableModel.getValueAt(row2, column);
int comparison = 0;
if (o1 == null && o2 == null) {
comparison = 0;
}
else if (o1 == null) {
comparison = -1;
}
else if (o2 == null) {
comparison = 1;
}
else {
comparison = getComparator(column).compare(o1, o2);
}
if (comparison != 0) {
return directive.direction == TableSorter.DESCENDING ? -comparison : comparison;
}
}
return 0;
}
}
private class SortableHeaderRenderer implements TableCellRenderer {
final private TableCellRenderer tableCellRenderer;
public SortableHeaderRenderer(final TableCellRenderer tableCellRenderer) {
this.tableCellRenderer = tableCellRenderer;
}
public Component getTableCellRendererComponent(final JTable table, final Object value,
final boolean isSelected, final boolean hasFocus, final int row,
final int column) {
final Component c = tableCellRenderer.getTableCellRendererComponent(table, value, isSelected, hasFocus,
row, column);
if (c instanceof JLabel) {
final JLabel l = (JLabel) c;
l.setHorizontalTextPosition(SwingConstants.LEFT);
final int modelColumn = table.convertColumnIndexToModel(column);
l.setIcon(getHeaderRendererIcon(modelColumn, l.getFont().getSize()));
}
return c;
}
}
private class TableModelHandler implements TableModelListener {
public void tableChanged(final TableModelEvent e) {
if (!isSorting()) {
clearSortingState();
fireTableChanged(e);
return;
}
if (e.getFirstRow() == TableModelEvent.HEADER_ROW) {
cancelSorting();
fireTableChanged(e);
return;
}
final int column = e.getColumn();
if (e.getFirstRow() == e.getLastRow() && column != TableModelEvent.ALL_COLUMNS
&& getSortingStatus(column) == TableSorter.NOT_SORTED && modelToView != null) {
final int viewIndex = getModelToView()[e.getFirstRow()];
fireTableChanged(new TableModelEvent(TableSorter.this, viewIndex, viewIndex, column, e.getType()));
return;
}
clearSortingState();
fireTableDataChanged();
return;
}
}
public static final int ASCENDING = 1;
public static final Comparator<Object> COMPARABLE_COMPARATOR = new Comparator<Object>() {
@SuppressWarnings("unchecked")
public int compare(final Object o1, final Object o2) {
return ((Comparable<Object>) o1).compareTo(o2);
}
};
public static final int DESCENDING = -1;
private static Directive EMPTY_DIRECTIVE = new Directive(-1, TableSorter.NOT_SORTED);
public static final Comparator<Object> LEXICAL_COMPARATOR = new Comparator<Object>() {
public int compare(final Object o1, final Object o2) {
return o1.toString().compareTo(o2.toString());
}
};
public static final int NOT_SORTED = 0;
private static final long serialVersionUID = 1L;
final private Map<Class<?>, Comparator<Object>> columnComparators = new HashMap<Class<?>, Comparator<Object>>();
private int[] modelToView;
final private MouseListener mouseListener;
final private List<Directive> sortingColumns = new ArrayList<Directive>();
private JTableHeader tableHeader;
protected TableModel tableModel;
final private TableModelListener tableModelListener;
private Row[] viewToModel;
public TableSorter() {
mouseListener = new MouseHandler();
tableModelListener = new TableModelHandler();
}
public TableSorter(final TableModel tableModel) {
this();
setTableModel(tableModel);
}
public TableSorter(final TableModel tableModel, final JTableHeader tableHeader) {
this();
setTableHeader(tableHeader);
setTableModel(tableModel);
}
private void cancelSorting() {
sortingColumns.clear();
sortingStatusChanged();
}
private void clearSortingState() {
viewToModel = null;
modelToView = null;
}
@Override
public Class<?> getColumnClass(final int column) {
return tableModel.getColumnClass(column);
}
public int getColumnCount() {
return (tableModel == null) ? 0 : tableModel.getColumnCount();
}
@Override
public String getColumnName(final int column) {
return tableModel.getColumnName(column);
}
protected Comparator<Object> getComparator(final int column) {
final Class<?> columnType = tableModel.getColumnClass(column);
final Comparator<Object> comparator = columnComparators.get(columnType);
if (comparator != null) {
return comparator;
}
if (Comparable.class.isAssignableFrom(columnType)) {
return TableSorter.COMPARABLE_COMPARATOR;
}
return TableSorter.LEXICAL_COMPARATOR;
}
private Directive getDirective(final int column) {
for (final Directive directive : sortingColumns) {
if (directive.column == column) {
return directive;
}
}
return TableSorter.EMPTY_DIRECTIVE;
}
protected Icon getHeaderRendererIcon(final int column, final int size) {
final Directive directive = getDirective(column);
if (directive == TableSorter.EMPTY_DIRECTIVE) {
return null;
}
return new Arrow(directive.direction == TableSorter.DESCENDING, size, sortingColumns.indexOf(directive));
}
private int[] getModelToView() {
if (modelToView == null) {
final int n = getViewToModel().length;
modelToView = new int[n];
for (int i = 0; i < n; i++) {
modelToView[modelIndex(i)] = i;
}
}
return modelToView;
}
public int getRowCount() {
return (tableModel == null) ? 0 : tableModel.getRowCount();
}
public int getSortingStatus(final int column) {
return getDirective(column).direction;
}
public JTableHeader getTableHeader() {
return tableHeader;
}
public TableModel getTableModel() {
return tableModel;
}
public Object getValueAt(final int row, final int column) {
return tableModel.getValueAt(modelIndex(row), column);
}
private Row[] getViewToModel() {
if (viewToModel == null) {
final int tableModelRowCount = tableModel.getRowCount();
viewToModel = new Row[tableModelRowCount];
for (int row = 0; row < tableModelRowCount; row++) {
viewToModel[row] = new Row(row);
}
if (isSorting()) {
Arrays.sort(viewToModel);
}
}
return viewToModel;
}
@Override
public boolean isCellEditable(final int row, final int column) {
return tableModel.isCellEditable(modelIndex(row), column);
}
public boolean isSorting() {
return sortingColumns.size() != 0;
}
public int modelIndex(final int viewIndex) {
return getViewToModel()[viewIndex].modelIndex;
}
public void setColumnComparator(final Class<?> type, final Comparator<Object> comparator) {
if (comparator == null) {
columnComparators.remove(type);
}
else {
columnComparators.put(type, comparator);
}
}
public void setSortingStatus(final int column, final int status) {
final Directive directive = getDirective(column);
if (directive != TableSorter.EMPTY_DIRECTIVE) {
sortingColumns.remove(directive);
}
if (status != TableSorter.NOT_SORTED) {
sortingColumns.add(new Directive(column, status));
}
sortingStatusChanged();
}
public void setTableHeader(final JTableHeader tableHeader) {
if (this.tableHeader != null) {
this.tableHeader.removeMouseListener(mouseListener);
final TableCellRenderer defaultRenderer = this.tableHeader.getDefaultRenderer();
if (defaultRenderer instanceof SortableHeaderRenderer) {
this.tableHeader.setDefaultRenderer(((SortableHeaderRenderer) defaultRenderer).tableCellRenderer);
}
}
this.tableHeader = tableHeader;
if (this.tableHeader != null) {
this.tableHeader.addMouseListener(mouseListener);
this.tableHeader.setDefaultRenderer(new SortableHeaderRenderer(this.tableHeader.getDefaultRenderer()));
}
}
public void setTableModel(final TableModel tableModel) {
if (this.tableModel != null) {
this.tableModel.removeTableModelListener(tableModelListener);
}
this.tableModel = tableModel;
if (this.tableModel != null) {
this.tableModel.addTableModelListener(tableModelListener);
}
clearSortingState();
fireTableStructureChanged();
}
@Override
public void setValueAt(final Object aValue, final int row, final int column) {
tableModel.setValueAt(aValue, modelIndex(row), column);
}
private void sortingStatusChanged() {
clearSortingState();
fireTableDataChanged();
if (tableHeader != null) {
tableHeader.repaint();
}
}
}