X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Futil%2FTableSorter.java;h=b14f6c06631c079126c9211c44f19d6604b38bb5;hb=ad15cff29620f960119f80176f1fd443da9f6763;hp=469bd7f594ef7045d20a79d8b7e8221a0e3017d5;hpb=7bc226b58110fa26d9dbd3f0c78095d06909ffc3;p=jalview.git
diff --git a/src/jalview/util/TableSorter.java b/src/jalview/util/TableSorter.java
index 469bd7f..b14f6c0 100755
--- a/src/jalview/util/TableSorter.java
+++ b/src/jalview/util/TableSorter.java
@@ -1,597 +1,600 @@
-/*
- * Jalview - A Sequence Alignment Editor and Viewer
- * Copyright (C) 2007 AM Waterhouse, J Procter, G Barton, M Clamp, S Searle
- *
- * 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, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
- */
-package jalview.util;
-
-import java.util.*;
-import java.util.List;
-
-import java.awt.*;
-import java.awt.event.*;
-import javax.swing.*;
-import javax.swing.event.*;
-import javax.swing.table.*;
-
-/**
- * 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.
- *
- * 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.
- *
- * 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:
- *
- * -
- * 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).
- *
-
- * 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}.
- *
-
- * 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.
- *
- *
- * 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
- */
-
-public class TableSorter
- extends AbstractTableModel
-{
- protected TableModel tableModel;
-
- public static final int DESCENDING = -1;
- public static final int NOT_SORTED = 0;
- public static final int ASCENDING = 1;
-
- private static Directive EMPTY_DIRECTIVE = new Directive( -1, NOT_SORTED);
-
- public static final Comparator COMPARABLE_COMAPRATOR = new Comparator()
- {
- public int compare(Object o1, Object o2)
- {
- return ( (Comparable) o1).compareTo(o2);
- }
- };
- public static final Comparator LEXICAL_COMPARATOR = new Comparator()
- {
- public int compare(Object o1, Object o2)
- {
- return o1.toString().compareTo(o2.toString());
- }
- };
-
- private Row[] viewToModel;
- private int[] modelToView;
-
- private JTableHeader tableHeader;
- private MouseListener mouseListener;
- private TableModelListener tableModelListener;
- private Map columnComparators = new HashMap();
- private List sortingColumns = new ArrayList();
-
- public TableSorter()
- {
- this.mouseListener = new MouseHandler();
- this.tableModelListener = new TableModelHandler();
- }
-
- public TableSorter(TableModel tableModel)
- {
- this();
- setTableModel(tableModel);
- }
-
- public TableSorter(TableModel tableModel, JTableHeader tableHeader)
- {
- this();
- setTableHeader(tableHeader);
- setTableModel(tableModel);
- }
-
- private void clearSortingState()
- {
- viewToModel = null;
- modelToView = null;
- }
-
- public TableModel getTableModel()
- {
- return tableModel;
- }
-
- public void setTableModel(TableModel tableModel)
- {
- if (this.tableModel != null)
- {
- this.tableModel.removeTableModelListener(tableModelListener);
- }
-
- this.tableModel = tableModel;
- if (this.tableModel != null)
- {
- this.tableModel.addTableModelListener(tableModelListener);
- }
-
- clearSortingState();
- fireTableStructureChanged();
- }
-
- public JTableHeader getTableHeader()
- {
- return tableHeader;
- }
-
- public void setTableHeader(JTableHeader tableHeader)
- {
- if (this.tableHeader != null)
- {
- this.tableHeader.removeMouseListener(mouseListener);
- 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 boolean isSorting()
- {
- return sortingColumns.size() != 0;
- }
-
- private Directive getDirective(int column)
- {
- for (int i = 0; i < sortingColumns.size(); i++)
- {
- Directive directive = (Directive) sortingColumns.get(i);
- if (directive.column == column)
- {
- return directive;
- }
- }
- return EMPTY_DIRECTIVE;
- }
-
- public int getSortingStatus(int column)
- {
- return getDirective(column).direction;
- }
-
- private void sortingStatusChanged()
- {
- clearSortingState();
- fireTableDataChanged();
- if (tableHeader != null)
- {
- tableHeader.repaint();
- }
- }
-
- public void setSortingStatus(int column, int status)
- {
- Directive directive = getDirective(column);
- if (directive != EMPTY_DIRECTIVE)
- {
- sortingColumns.remove(directive);
- }
- if (status != NOT_SORTED)
- {
- sortingColumns.add(new Directive(column, status));
- }
- sortingStatusChanged();
- }
-
- protected Icon getHeaderRendererIcon(int column, int size)
- {
- Directive directive = getDirective(column);
- if (directive == EMPTY_DIRECTIVE)
- {
- return null;
- }
- return new Arrow(directive.direction == DESCENDING, size,
- sortingColumns.indexOf(directive));
- }
-
- private void cancelSorting()
- {
- sortingColumns.clear();
- sortingStatusChanged();
- }
-
- public void setColumnComparator(Class type, Comparator comparator)
- {
- if (comparator == null)
- {
- columnComparators.remove(type);
- }
- else
- {
- columnComparators.put(type, comparator);
- }
- }
-
- protected Comparator getComparator(int column)
- {
- Class columnType = tableModel.getColumnClass(column);
- Comparator comparator = (Comparator) columnComparators.get(columnType);
- if (comparator != null)
- {
- return comparator;
- }
- if (Comparable.class.isAssignableFrom(columnType))
- {
- return COMPARABLE_COMAPRATOR;
- }
- return LEXICAL_COMPARATOR;
- }
-
- private Row[] getViewToModel()
- {
- if (viewToModel == null)
- {
- 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;
- }
-
- public int modelIndex(int viewIndex)
- {
- return getViewToModel()[viewIndex].modelIndex;
- }
-
- private int[] getModelToView()
- {
- if (modelToView == null)
- {
- int n = getViewToModel().length;
- modelToView = new int[n];
- for (int i = 0; i < n; i++)
- {
- modelToView[modelIndex(i)] = i;
- }
- }
- return modelToView;
- }
-
- // TableModel interface methods
-
- public int getRowCount()
- {
- return (tableModel == null) ? 0 : tableModel.getRowCount();
- }
-
- public int getColumnCount()
- {
- return (tableModel == null) ? 0 : tableModel.getColumnCount();
- }
-
- public String getColumnName(int column)
- {
- return tableModel.getColumnName(column);
- }
-
- public Class getColumnClass(int column)
- {
- return tableModel.getColumnClass(column);
- }
-
- public boolean isCellEditable(int row, int column)
- {
- return tableModel.isCellEditable(modelIndex(row), column);
- }
-
- public Object getValueAt(int row, int column)
- {
- return tableModel.getValueAt(modelIndex(row), column);
- }
-
- public void setValueAt(Object aValue, int row, int column)
- {
- tableModel.setValueAt(aValue, modelIndex(row), column);
- }
-
- // Helper classes
-
- private class Row
- implements Comparable
- {
- private int modelIndex;
-
- public Row(int index)
- {
- this.modelIndex = index;
- }
-
- public int compareTo(Object o)
- {
- int row1 = modelIndex;
- int row2 = ( (Row) o).modelIndex;
-
- for (Iterator it = sortingColumns.iterator(); it.hasNext(); )
- {
- Directive directive = (Directive) it.next();
- int column = directive.column;
- Object o1 = tableModel.getValueAt(row1, column);
- Object o2 = tableModel.getValueAt(row2, column);
-
- int comparison = 0;
- // Define null less than everything, except null.
- 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 == DESCENDING ? -comparison : comparison;
- }
- }
- return 0;
- }
- }
-
- private class TableModelHandler
- implements TableModelListener
- {
- public void tableChanged(TableModelEvent e)
- {
- // If we're not sorting by anything, just pass the event along.
- if (!isSorting())
- {
- clearSortingState();
- fireTableChanged(e);
- return;
- }
-
- // If the table structure has changed, cancel the sorting; the
- // sorting columns may have been either moved or deleted from
- // the model.
- if (e.getFirstRow() == TableModelEvent.HEADER_ROW)
- {
- cancelSorting();
- fireTableChanged(e);
- return;
- }
-
- // We can map a cell event through to the view without widening
- // when the following conditions apply:
- //
- // a) all the changes are on one row (e.getFirstRow() == e.getLastRow()) and,
- // b) all the changes are in one column (column != TableModelEvent.ALL_COLUMNS) and,
- // c) we are not sorting on that column (getSortingStatus(column) == NOT_SORTED) and,
- // d) a reverse lookup will not trigger a sort (modelToView != null)
- //
- // Note: INSERT and DELETE events fail this test as they have column == ALL_COLUMNS.
- //
- // The last check, for (modelToView != null) is to see if modelToView
- // is already allocated. If we don't do this check; sorting can become
- // a performance bottleneck for applications where cells
- // change rapidly in different parts of the table. If cells
- // change alternately in the sorting column and then outside of
- // it this class can end up re-sorting on alternate cell updates -
- // which can be a performance problem for large tables. The last
- // clause avoids this problem.
- int column = e.getColumn();
- if (e.getFirstRow() == e.getLastRow()
- && column != TableModelEvent.ALL_COLUMNS
- && getSortingStatus(column) == NOT_SORTED
- && modelToView != null)
- {
- int viewIndex = getModelToView()[e.getFirstRow()];
- fireTableChanged(new TableModelEvent(TableSorter.this,
- viewIndex, viewIndex,
- column, e.getType()));
- return;
- }
-
- // Something has happened to the data that may have invalidated the row order.
- clearSortingState();
- fireTableDataChanged();
- return;
- }
- }
-
- private class MouseHandler
- extends MouseAdapter
- {
- public void mouseClicked(MouseEvent e)
- {
- JTableHeader h = (JTableHeader) e.getSource();
- TableColumnModel columnModel = h.getColumnModel();
- int viewColumn = columnModel.getColumnIndexAtX(e.getX());
- int column = columnModel.getColumn(viewColumn).getModelIndex();
- if (column != -1)
- {
- int status = getSortingStatus(column);
- if (!e.isControlDown())
- {
- cancelSorting();
- }
- // Cycle the sorting states through {NOT_SORTED, ASCENDING, DESCENDING} or
- // {NOT_SORTED, DESCENDING, ASCENDING} depending on whether shift is pressed.
- status = status + (e.isShiftDown() ? -1 : 1);
- status = (status + 4) % 3 - 1; // signed mod, returning {-1, 0, 1}
- setSortingStatus(column, status);
- }
- }
- }
-
- private static class Arrow
- implements Icon
- {
- private boolean descending;
- private int size;
- private int priority;
-
- public Arrow(boolean descending, int size, int priority)
- {
- this.descending = descending;
- this.size = size;
- this.priority = priority;
- }
-
- public void paintIcon(Component c, Graphics g, int x, int y)
- {
- Color color = c == null ? Color.GRAY : c.getBackground();
- // In a compound sort, make each succesive triangle 20%
- // smaller than the previous one.
- int dx = (int) (size / 2 * Math.pow(0.8, priority));
- int dy = descending ? dx : -dx;
- // Align icon (roughly) with font baseline.
- y = y + 5 * size / 6 + (descending ? -dy : 0);
- int shift = descending ? 1 : -1;
- g.translate(x, y);
-
- // Right diagonal.
- g.setColor(color.darker());
- g.drawLine(dx / 2, dy, 0, 0);
- g.drawLine(dx / 2, dy + shift, 0, shift);
-
- // Left diagonal.
- g.setColor(color.brighter());
- g.drawLine(dx / 2, dy, dx, 0);
- g.drawLine(dx / 2, dy + shift, dx, shift);
-
- // Horizontal line.
- 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);
- }
-
- public int getIconWidth()
- {
- return size;
- }
-
- public int getIconHeight()
- {
- return size;
- }
- }
-
- private class SortableHeaderRenderer
- implements TableCellRenderer
- {
- private TableCellRenderer tableCellRenderer;
-
- public SortableHeaderRenderer(TableCellRenderer tableCellRenderer)
- {
- this.tableCellRenderer = tableCellRenderer;
- }
-
- public Component getTableCellRendererComponent(JTable table,
- Object value,
- boolean isSelected,
- boolean hasFocus,
- int row,
- int column)
- {
- Component c = tableCellRenderer.getTableCellRendererComponent(table,
- value, isSelected, hasFocus, row, column);
- if (c instanceof JLabel)
- {
- JLabel l = (JLabel) c;
- l.setHorizontalTextPosition(JLabel.LEFT);
- int modelColumn = table.convertColumnIndexToModel(column);
- l.setIcon(getHeaderRendererIcon(modelColumn, l.getFont().getSize()));
- }
- return c;
- }
- }
-
- private static class Directive
- {
- private int column;
- private int direction;
-
- public Directive(int column, int direction)
- {
- this.column = column;
- this.direction = direction;
- }
- }
-}
+/*
+ * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
+ * Copyright (C) $$Year-Rel$$ The Jalview Authors
+ *
+ * This file is part of Jalview.
+ *
+ * Jalview 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 3
+ * of the License, or (at your option) any later version.
+ *
+ * Jalview 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 Jalview. If not, see .
+ * The Jalview Authors are detailed in the 'AUTHORS' file.
+ */
+package jalview.util;
+
+import java.util.*;
+import java.util.List;
+
+import java.awt.*;
+import java.awt.event.*;
+import javax.swing.*;
+import javax.swing.event.*;
+import javax.swing.table.*;
+
+/**
+ * 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.
+ *
+ * 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.
+ *
+ * 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:
+ *
+ * - 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).
+ *
- 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}.
+ *
- 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.
+ *
+ *
+ * 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
+ */
+
+public class TableSorter extends AbstractTableModel
+{
+ protected TableModel tableModel;
+
+ public static final int DESCENDING = -1;
+
+ public static final int NOT_SORTED = 0;
+
+ public static final int ASCENDING = 1;
+
+ private static Directive EMPTY_DIRECTIVE = new Directive(-1, NOT_SORTED);
+
+ public static final Comparator COMPARABLE_COMAPRATOR = new Comparator()
+ {
+ public int compare(Object o1, Object o2)
+ {
+ return ((Comparable) o1).compareTo(o2);
+ }
+ };
+
+ public static final Comparator LEXICAL_COMPARATOR = new Comparator()
+ {
+ public int compare(Object o1, Object o2)
+ {
+ return o1.toString().compareTo(o2.toString());
+ }
+ };
+
+ private Row[] viewToModel;
+
+ private int[] modelToView;
+
+ private JTableHeader tableHeader;
+
+ private MouseListener mouseListener;
+
+ private TableModelListener tableModelListener;
+
+ private Map columnComparators = new HashMap();
+
+ private List sortingColumns = new ArrayList();
+
+ public TableSorter()
+ {
+ this.mouseListener = new MouseHandler();
+ this.tableModelListener = new TableModelHandler();
+ }
+
+ public TableSorter(TableModel tableModel)
+ {
+ this();
+ setTableModel(tableModel);
+ }
+
+ public TableSorter(TableModel tableModel, JTableHeader tableHeader)
+ {
+ this();
+ setTableHeader(tableHeader);
+ setTableModel(tableModel);
+ }
+
+ private void clearSortingState()
+ {
+ viewToModel = null;
+ modelToView = null;
+ }
+
+ public TableModel getTableModel()
+ {
+ return tableModel;
+ }
+
+ public void setTableModel(TableModel tableModel)
+ {
+ if (this.tableModel != null)
+ {
+ this.tableModel.removeTableModelListener(tableModelListener);
+ }
+
+ this.tableModel = tableModel;
+ if (this.tableModel != null)
+ {
+ this.tableModel.addTableModelListener(tableModelListener);
+ }
+
+ clearSortingState();
+ fireTableStructureChanged();
+ }
+
+ public JTableHeader getTableHeader()
+ {
+ return tableHeader;
+ }
+
+ public void setTableHeader(JTableHeader tableHeader)
+ {
+ if (this.tableHeader != null)
+ {
+ this.tableHeader.removeMouseListener(mouseListener);
+ 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 boolean isSorting()
+ {
+ return sortingColumns.size() != 0;
+ }
+
+ private Directive getDirective(int column)
+ {
+ for (int i = 0; i < sortingColumns.size(); i++)
+ {
+ Directive directive = (Directive) sortingColumns.get(i);
+ if (directive.column == column)
+ {
+ return directive;
+ }
+ }
+ return EMPTY_DIRECTIVE;
+ }
+
+ public int getSortingStatus(int column)
+ {
+ return getDirective(column).direction;
+ }
+
+ private void sortingStatusChanged()
+ {
+ clearSortingState();
+ fireTableDataChanged();
+ if (tableHeader != null)
+ {
+ tableHeader.repaint();
+ }
+ }
+
+ public void setSortingStatus(int column, int status)
+ {
+ Directive directive = getDirective(column);
+ if (directive != EMPTY_DIRECTIVE)
+ {
+ sortingColumns.remove(directive);
+ }
+ if (status != NOT_SORTED)
+ {
+ sortingColumns.add(new Directive(column, status));
+ }
+ sortingStatusChanged();
+ }
+
+ protected Icon getHeaderRendererIcon(int column, int size)
+ {
+ Directive directive = getDirective(column);
+ if (directive == EMPTY_DIRECTIVE)
+ {
+ return null;
+ }
+ return new Arrow(directive.direction == DESCENDING, size,
+ sortingColumns.indexOf(directive));
+ }
+
+ private void cancelSorting()
+ {
+ sortingColumns.clear();
+ sortingStatusChanged();
+ }
+
+ public void setColumnComparator(Class type, Comparator comparator)
+ {
+ if (comparator == null)
+ {
+ columnComparators.remove(type);
+ }
+ else
+ {
+ columnComparators.put(type, comparator);
+ }
+ }
+
+ protected Comparator getComparator(int column)
+ {
+ Class columnType = tableModel.getColumnClass(column);
+ Comparator comparator = (Comparator) columnComparators.get(columnType);
+ if (comparator != null)
+ {
+ return comparator;
+ }
+ if (Comparable.class.isAssignableFrom(columnType))
+ {
+ return COMPARABLE_COMAPRATOR;
+ }
+ return LEXICAL_COMPARATOR;
+ }
+
+ private Row[] getViewToModel()
+ {
+ if (viewToModel == null)
+ {
+ 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;
+ }
+
+ public int modelIndex(int viewIndex)
+ {
+ return getViewToModel()[viewIndex].modelIndex;
+ }
+
+ private int[] getModelToView()
+ {
+ if (modelToView == null)
+ {
+ int n = getViewToModel().length;
+ modelToView = new int[n];
+ for (int i = 0; i < n; i++)
+ {
+ modelToView[modelIndex(i)] = i;
+ }
+ }
+ return modelToView;
+ }
+
+ // TableModel interface methods
+
+ public int getRowCount()
+ {
+ return (tableModel == null) ? 0 : tableModel.getRowCount();
+ }
+
+ public int getColumnCount()
+ {
+ return (tableModel == null) ? 0 : tableModel.getColumnCount();
+ }
+
+ public String getColumnName(int column)
+ {
+ return tableModel.getColumnName(column);
+ }
+
+ public Class getColumnClass(int column)
+ {
+ return tableModel.getColumnClass(column);
+ }
+
+ public boolean isCellEditable(int row, int column)
+ {
+ return tableModel.isCellEditable(modelIndex(row), column);
+ }
+
+ public Object getValueAt(int row, int column)
+ {
+ return tableModel.getValueAt(modelIndex(row), column);
+ }
+
+ public void setValueAt(Object aValue, int row, int column)
+ {
+ tableModel.setValueAt(aValue, modelIndex(row), column);
+ }
+
+ // Helper classes
+
+ private class Row implements Comparable
+ {
+ private int modelIndex;
+
+ public Row(int index)
+ {
+ this.modelIndex = index;
+ }
+
+ public int compareTo(Object o)
+ {
+ int row1 = modelIndex;
+ int row2 = ((Row) o).modelIndex;
+
+ for (Iterator it = sortingColumns.iterator(); it.hasNext();)
+ {
+ Directive directive = (Directive) it.next();
+ int column = directive.column;
+ Object o1 = tableModel.getValueAt(row1, column);
+ Object o2 = tableModel.getValueAt(row2, column);
+
+ int comparison = 0;
+ // Define null less than everything, except null.
+ 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 == DESCENDING ? -comparison
+ : comparison;
+ }
+ }
+ return 0;
+ }
+ }
+
+ private class TableModelHandler implements TableModelListener
+ {
+ public void tableChanged(TableModelEvent e)
+ {
+ // If we're not sorting by anything, just pass the event along.
+ if (!isSorting())
+ {
+ clearSortingState();
+ fireTableChanged(e);
+ return;
+ }
+
+ // If the table structure has changed, cancel the sorting; the
+ // sorting columns may have been either moved or deleted from
+ // the model.
+ if (e.getFirstRow() == TableModelEvent.HEADER_ROW)
+ {
+ cancelSorting();
+ fireTableChanged(e);
+ return;
+ }
+
+ // We can map a cell event through to the view without widening
+ // when the following conditions apply:
+ //
+ // a) all the changes are on one row (e.getFirstRow() == e.getLastRow())
+ // and,
+ // b) all the changes are in one column (column !=
+ // TableModelEvent.ALL_COLUMNS) and,
+ // c) we are not sorting on that column (getSortingStatus(column) ==
+ // NOT_SORTED) and,
+ // d) a reverse lookup will not trigger a sort (modelToView != null)
+ //
+ // Note: INSERT and DELETE events fail this test as they have column ==
+ // ALL_COLUMNS.
+ //
+ // The last check, for (modelToView != null) is to see if modelToView
+ // is already allocated. If we don't do this check; sorting can become
+ // a performance bottleneck for applications where cells
+ // change rapidly in different parts of the table. If cells
+ // change alternately in the sorting column and then outside of
+ // it this class can end up re-sorting on alternate cell updates -
+ // which can be a performance problem for large tables. The last
+ // clause avoids this problem.
+ int column = e.getColumn();
+ if (e.getFirstRow() == e.getLastRow()
+ && column != TableModelEvent.ALL_COLUMNS
+ && getSortingStatus(column) == NOT_SORTED
+ && modelToView != null)
+ {
+ int viewIndex = getModelToView()[e.getFirstRow()];
+ fireTableChanged(new TableModelEvent(TableSorter.this, viewIndex,
+ viewIndex, column, e.getType()));
+ return;
+ }
+
+ // Something has happened to the data that may have invalidated the row
+ // order.
+ clearSortingState();
+ fireTableDataChanged();
+ return;
+ }
+ }
+
+ private class MouseHandler extends MouseAdapter
+ {
+ public void mouseClicked(MouseEvent e)
+ {
+ JTableHeader h = (JTableHeader) e.getSource();
+ TableColumnModel columnModel = h.getColumnModel();
+ int viewColumn = columnModel.getColumnIndexAtX(e.getX());
+ int column = columnModel.getColumn(viewColumn).getModelIndex();
+ if (column != -1)
+ {
+ int status = getSortingStatus(column);
+ if (!e.isControlDown())
+ {
+ cancelSorting();
+ }
+ // Cycle the sorting states through {NOT_SORTED, ASCENDING, DESCENDING}
+ // or
+ // {NOT_SORTED, DESCENDING, ASCENDING} depending on whether shift is
+ // pressed.
+ status = status + (e.isShiftDown() ? -1 : 1);
+ status = (status + 4) % 3 - 1; // signed mod, returning {-1, 0, 1}
+ setSortingStatus(column, status);
+ }
+ }
+ }
+
+ private static class Arrow implements Icon
+ {
+ private boolean descending;
+
+ private int size;
+
+ private int priority;
+
+ public Arrow(boolean descending, int size, int priority)
+ {
+ this.descending = descending;
+ this.size = size;
+ this.priority = priority;
+ }
+
+ public void paintIcon(Component c, Graphics g, int x, int y)
+ {
+ Color color = c == null ? Color.GRAY : c.getBackground();
+ // In a compound sort, make each succesive triangle 20%
+ // smaller than the previous one.
+ int dx = (int) (size / 2 * Math.pow(0.8, priority));
+ int dy = descending ? dx : -dx;
+ // Align icon (roughly) with font baseline.
+ y = y + 5 * size / 6 + (descending ? -dy : 0);
+ int shift = descending ? 1 : -1;
+ g.translate(x, y);
+
+ // Right diagonal.
+ g.setColor(color.darker());
+ g.drawLine(dx / 2, dy, 0, 0);
+ g.drawLine(dx / 2, dy + shift, 0, shift);
+
+ // Left diagonal.
+ g.setColor(color.brighter());
+ g.drawLine(dx / 2, dy, dx, 0);
+ g.drawLine(dx / 2, dy + shift, dx, shift);
+
+ // Horizontal line.
+ 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);
+ }
+
+ public int getIconWidth()
+ {
+ return size;
+ }
+
+ public int getIconHeight()
+ {
+ return size;
+ }
+ }
+
+ private class SortableHeaderRenderer implements TableCellRenderer
+ {
+ private TableCellRenderer tableCellRenderer;
+
+ public SortableHeaderRenderer(TableCellRenderer tableCellRenderer)
+ {
+ this.tableCellRenderer = tableCellRenderer;
+ }
+
+ public Component getTableCellRendererComponent(JTable table,
+ Object value, boolean isSelected, boolean hasFocus, int row,
+ int column)
+ {
+ Component c = tableCellRenderer.getTableCellRendererComponent(table,
+ value, isSelected, hasFocus, row, column);
+ if (c instanceof JLabel)
+ {
+ JLabel l = (JLabel) c;
+ l.setHorizontalTextPosition(JLabel.LEFT);
+ int modelColumn = table.convertColumnIndexToModel(column);
+ l.setIcon(getHeaderRendererIcon(modelColumn, l.getFont().getSize()));
+ }
+ return c;
+ }
+ }
+
+ private static class Directive
+ {
+ private int column;
+
+ private int direction;
+
+ public Directive(int column, int direction)
+ {
+ this.column = column;
+ this.direction = direction;
+ }
+ }
+}