JDK8/Java8源码在线阅读
/*
* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package javax.swing.plaf.basic;
import java.awt.*;
import java.awt.datatransfer.*;
import java.awt.dnd.*;
import java.awt.event.*;
import java.util.Enumeration;
import java.util.EventObject;
import java.util.Hashtable;
import java.util.TooManyListenersException;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.plaf.*;
import javax.swing.text.*;
import javax.swing.table.*;
import javax.swing.plaf.basic.DragRecognitionSupport.BeforeDrag;
import sun.swing.SwingUtilities2;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import sun.swing.DefaultLookup;
import sun.swing.UIAction;
/**
* BasicTableUI implementation
*
* @author Philip Milne
* @author Shannon Hickey (drag and drop)
*/
public class BasicTableUI extends TableUI
{
private static final StringBuilder BASELINE_COMPONENT_KEY =
new StringBuilder("Table.baselineComponent");
//
// Instance Variables
//
// The JTable that is delegating the painting to this UI.
protected JTable table;
protected CellRendererPane rendererPane;
// Listeners that are attached to the JTable
protected KeyListener keyListener;
protected FocusListener focusListener;
protected MouseInputListener mouseInputListener;
private Handler handler;
/**
* Local cache of Table's client property "Table.isFileList"
*/
private boolean isFileList = false;
//
// Helper class for keyboard actions
//
private static class Actions extends UIAction {
private static final String CANCEL_EDITING = "cancel";
private static final String SELECT_ALL = "selectAll";
private static final String CLEAR_SELECTION = "clearSelection";
private static final String START_EDITING = "startEditing";
private static final String NEXT_ROW = "selectNextRow";
private static final String NEXT_ROW_CELL = "selectNextRowCell";
private static final String NEXT_ROW_EXTEND_SELECTION =
"selectNextRowExtendSelection";
private static final String NEXT_ROW_CHANGE_LEAD =
"selectNextRowChangeLead";
private static final String PREVIOUS_ROW = "selectPreviousRow";
private static final String PREVIOUS_ROW_CELL = "selectPreviousRowCell";
private static final String PREVIOUS_ROW_EXTEND_SELECTION =
"selectPreviousRowExtendSelection";
private static final String PREVIOUS_ROW_CHANGE_LEAD =
"selectPreviousRowChangeLead";
private static final String NEXT_COLUMN = "selectNextColumn";
private static final String NEXT_COLUMN_CELL = "selectNextColumnCell";
private static final String NEXT_COLUMN_EXTEND_SELECTION =
"selectNextColumnExtendSelection";
private static final String NEXT_COLUMN_CHANGE_LEAD =
"selectNextColumnChangeLead";
private static final String PREVIOUS_COLUMN = "selectPreviousColumn";
private static final String PREVIOUS_COLUMN_CELL =
"selectPreviousColumnCell";
private static final String PREVIOUS_COLUMN_EXTEND_SELECTION =
"selectPreviousColumnExtendSelection";
private static final String PREVIOUS_COLUMN_CHANGE_LEAD =
"selectPreviousColumnChangeLead";
private static final String SCROLL_LEFT_CHANGE_SELECTION =
"scrollLeftChangeSelection";
private static final String SCROLL_LEFT_EXTEND_SELECTION =
"scrollLeftExtendSelection";
private static final String SCROLL_RIGHT_CHANGE_SELECTION =
"scrollRightChangeSelection";
private static final String SCROLL_RIGHT_EXTEND_SELECTION =
"scrollRightExtendSelection";
private static final String SCROLL_UP_CHANGE_SELECTION =
"scrollUpChangeSelection";
private static final String SCROLL_UP_EXTEND_SELECTION =
"scrollUpExtendSelection";
private static final String SCROLL_DOWN_CHANGE_SELECTION =
"scrollDownChangeSelection";
private static final String SCROLL_DOWN_EXTEND_SELECTION =
"scrollDownExtendSelection";
private static final String FIRST_COLUMN =
"selectFirstColumn";
private static final String FIRST_COLUMN_EXTEND_SELECTION =
"selectFirstColumnExtendSelection";
private static final String LAST_COLUMN =
"selectLastColumn";
private static final String LAST_COLUMN_EXTEND_SELECTION =
"selectLastColumnExtendSelection";
private static final String FIRST_ROW =
"selectFirstRow";
private static final String FIRST_ROW_EXTEND_SELECTION =
"selectFirstRowExtendSelection";
private static final String LAST_ROW =
"selectLastRow";
private static final String LAST_ROW_EXTEND_SELECTION =
"selectLastRowExtendSelection";
// add the lead item to the selection without changing lead or anchor
private static final String ADD_TO_SELECTION = "addToSelection";
// toggle the selected state of the lead item and move the anchor to it
private static final String TOGGLE_AND_ANCHOR = "toggleAndAnchor";
// extend the selection to the lead item
private static final String EXTEND_TO = "extendTo";
// move the anchor to the lead and ensure only that item is selected
private static final String MOVE_SELECTION_TO = "moveSelectionTo";
// give focus to the JTableHeader, if one exists
private static final String FOCUS_HEADER = "focusHeader";
protected int dx;
protected int dy;
protected boolean extend;
protected boolean inSelection;
// horizontally, forwards always means right,
// regardless of component orientation
protected boolean forwards;
protected boolean vertically;
protected boolean toLimit;
protected int leadRow;
protected int leadColumn;
Actions(String name) {
super(name);
}
Actions(String name, int dx, int dy, boolean extend,
boolean inSelection) {
super(name);
// Actions spcifying true for "inSelection" are
// fairly sensitive to bad parameter values. They require
// that one of dx and dy be 0 and the other be -1 or 1.
// Bogus parameter values could cause an infinite loop.
// To prevent any problems we massage the params here
// and complain if we get something we can't deal with.
if (inSelection) {
this.inSelection = true;
// look at the sign of dx and dy only
dx = sign(dx);
dy = sign(dy);
// make sure one is zero, but not both
assert (dx == 0 || dy == 0) && !(dx == 0 && dy == 0);
}
this.dx = dx;
this.dy = dy;
this.extend = extend;
}
Actions(String name, boolean extend, boolean forwards,
boolean vertically, boolean toLimit) {
this(name, 0, 0, extend, false);
this.forwards = forwards;
this.vertically = vertically;
this.toLimit = toLimit;
}
private static int clipToRange(int i, int a, int b) {
return Math.min(Math.max(i, a), b-1);
}
private void moveWithinTableRange(JTable table, int dx, int dy) {
leadRow = clipToRange(leadRow+dy, 0, table.getRowCount());
leadColumn = clipToRange(leadColumn+dx, 0, table.getColumnCount());
}
private static int sign(int num) {
return (num < 0) ? -1 : ((num == 0) ? 0 : 1);
}
/**
* Called to move within the selected range of the given JTable.
* This method uses the table's notion of selection, which is
* important to allow the user to navigate between items visually
* selected on screen. This notion may or may not be the same as
* what could be determined by directly querying the selection models.
* It depends on certain table properties (such as whether or not
* row or column selection is allowed). When performing modifications,
* it is recommended that caution be taken in order to preserve
* the intent of this method, especially when deciding whether to
* query the selection models or interact with JTable directly.
*/
private boolean moveWithinSelectedRange(JTable table, int dx, int dy,
ListSelectionModel rsm, ListSelectionModel csm) {
// Note: The Actions constructor ensures that only one of
// dx and dy is 0, and the other is either -1 or 1
// find out how many items the table is showing as selected
// and the range of items to navigate through
int totalCount;
int minX, maxX, minY, maxY;
boolean rs = table.getRowSelectionAllowed();
boolean cs = table.getColumnSelectionAllowed();
// both column and row selection
if (rs && cs) {
totalCount = table.getSelectedRowCount() * table.getSelectedColumnCount();
minX = csm.getMinSelectionIndex();
maxX = csm.getMaxSelectionIndex();
minY = rsm.getMinSelectionIndex();
maxY = rsm.getMaxSelectionIndex();
// row selection only
} else if (rs) {
totalCount = table.getSelectedRowCount();
minX = 0;
maxX = table.getColumnCount() - 1;
minY = rsm.getMinSelectionIndex();
maxY = rsm.getMaxSelectionIndex();
// column selection only
} else if (cs) {
totalCount = table.getSelectedColumnCount();
minX = csm.getMinSelectionIndex();
maxX = csm.getMaxSelectionIndex();
minY = 0;
maxY = table.getRowCount() - 1;
// no selection allowed
} else {
totalCount = 0;
// A bogus assignment to stop javac from complaining
// about unitialized values. In this case, these
// won't even be used.
minX = maxX = minY = maxY = 0;
}
// For some cases, there is no point in trying to stay within the
// selected area. Instead, move outside the selection, wrapping at
// the table boundaries. The cases are:
boolean stayInSelection;
// - nothing selected
if (totalCount == 0 ||
// - one item selected, and the lead is already selected
(totalCount == 1 && table.isCellSelected(leadRow, leadColumn))) {
stayInSelection = false;
maxX = table.getColumnCount() - 1;
maxY = table.getRowCount() - 1;
// the mins are calculated like this in case the max is -1
minX = Math.min(0, maxX);
minY = Math.min(0, maxY);
} else {
stayInSelection = true;
}
// the algorithm below isn't prepared to deal with -1 lead/anchor
// so massage appropriately here first
if (dy == 1 && leadColumn == -1) {
leadColumn = minX;
leadRow = -1;
} else if (dx == 1 && leadRow == -1) {
leadRow = minY;
leadColumn = -1;
} else if (dy == -1 && leadColumn == -1) {
leadColumn = maxX;
leadRow = maxY + 1;
} else if (dx == -1 && leadRow == -1) {
leadRow = maxY;
leadColumn = maxX + 1;
}
// In cases where the lead is not within the search range,
// we need to bring it within one cell for the the search
// to work properly. Check these here.
leadRow = Math.min(Math.max(leadRow, minY - 1), maxY + 1);
leadColumn = Math.min(Math.max(leadColumn, minX - 1), maxX + 1);
// find the next position, possibly looping until it is selected
do {
calcNextPos(dx, minX, maxX, dy, minY, maxY);
} while (stayInSelection && !table.isCellSelected(leadRow, leadColumn));
return stayInSelection;
}
/**
* Find the next lead row and column based on the given
* dx/dy and max/min values.
*/
private void calcNextPos(int dx, int minX, int maxX,
int dy, int minY, int maxY) {
if (dx != 0) {
leadColumn += dx;
if (leadColumn > maxX) {
leadColumn = minX;
leadRow++;
if (leadRow > maxY) {
leadRow = minY;
}
} else if (leadColumn < minX) {
leadColumn = maxX;
leadRow--;
if (leadRow < minY) {
leadRow = maxY;
}
}
} else {
leadRow += dy;
if (leadRow > maxY) {
leadRow = minY;
leadColumn++;
if (leadColumn > maxX) {
leadColumn = minX;
}
} else if (leadRow < minY) {
leadRow = maxY;
leadColumn--;
if (leadColumn < minX) {
leadColumn = maxX;
}
}
}
}
public void actionPerformed(ActionEvent e) {
String key = getName();
JTable table = (JTable)e.getSource();
ListSelectionModel rsm = table.getSelectionModel();
leadRow = getAdjustedLead(table, true, rsm);
ListSelectionModel csm = table.getColumnModel().getSelectionModel();
leadColumn = getAdjustedLead(table, false, csm);
if (key == SCROLL_LEFT_CHANGE_SELECTION || // Paging Actions
key == SCROLL_LEFT_EXTEND_SELECTION ||
key == SCROLL_RIGHT_CHANGE_SELECTION ||
key == SCROLL_RIGHT_EXTEND_SELECTION ||
key == SCROLL_UP_CHANGE_SELECTION ||
key == SCROLL_UP_EXTEND_SELECTION ||
key == SCROLL_DOWN_CHANGE_SELECTION ||
key == SCROLL_DOWN_EXTEND_SELECTION ||
key == FIRST_COLUMN ||
key == FIRST_COLUMN_EXTEND_SELECTION ||
key == FIRST_ROW ||
key == FIRST_ROW_EXTEND_SELECTION ||
key == LAST_COLUMN ||
key == LAST_COLUMN_EXTEND_SELECTION ||
key == LAST_ROW ||
key == LAST_ROW_EXTEND_SELECTION) {
if (toLimit) {
if (vertically) {
int rowCount = table.getRowCount();
this.dx = 0;
this.dy = forwards ? rowCount : -rowCount;
}
else {
int colCount = table.getColumnCount();
this.dx = forwards ? colCount : -colCount;
this.dy = 0;
}
}
else {
if (!(SwingUtilities.getUnwrappedParent(table).getParent() instanceof
JScrollPane)) {
return;
}
Dimension delta = table.getParent().getSize();
if (vertically) {
Rectangle r = table.getCellRect(leadRow, 0, true);
if (forwards) {
// scroll by at least one cell
r.y += Math.max(delta.height, r.height);
} else {
r.y -= delta.height;
}
this.dx = 0;
int newRow = table.rowAtPoint(r.getLocation());
if (newRow == -1 && forwards) {
newRow = table.getRowCount();
}
this.dy = newRow - leadRow;
}
else {
Rectangle r = table.getCellRect(0, leadColumn, true);
if (forwards) {
// scroll by at least one cell
r.x += Math.max(delta.width, r.width);
} else {
r.x -= delta.width;
}
int newColumn = table.columnAtPoint(r.getLocation());
if (newColumn == -1) {
boolean ltr = table.getComponentOrientation().isLeftToRight();
newColumn = forwards ? (ltr ? table.getColumnCount() : 0)
: (ltr ? 0 : table.getColumnCount());
}
this.dx = newColumn - leadColumn;
this.dy = 0;
}
}
}
if (key == NEXT_ROW || // Navigate Actions
key == NEXT_ROW_CELL ||
key == NEXT_ROW_EXTEND_SELECTION ||
key == NEXT_ROW_CHANGE_LEAD ||
key == NEXT_COLUMN ||
key == NEXT_COLUMN_CELL ||
key == NEXT_COLUMN_EXTEND_SELECTION ||
key == NEXT_COLUMN_CHANGE_LEAD ||
key == PREVIOUS_ROW ||
key == PREVIOUS_ROW_CELL ||
key == PREVIOUS_ROW_EXTEND_SELECTION ||
key == PREVIOUS_ROW_CHANGE_LEAD ||
key == PREVIOUS_COLUMN ||
key == PREVIOUS_COLUMN_CELL ||
key == PREVIOUS_COLUMN_EXTEND_SELECTION ||
key == PREVIOUS_COLUMN_CHANGE_LEAD ||
// Paging Actions.
key == SCROLL_LEFT_CHANGE_SELECTION ||
key == SCROLL_LEFT_EXTEND_SELECTION ||
key == SCROLL_RIGHT_CHANGE_SELECTION ||
key == SCROLL_RIGHT_EXTEND_SELECTION ||
key == SCROLL_UP_CHANGE_SELECTION ||
key == SCROLL_UP_EXTEND_SELECTION ||
key == SCROLL_DOWN_CHANGE_SELECTION ||
key == SCROLL_DOWN_EXTEND_SELECTION ||
key == FIRST_COLUMN ||
key == FIRST_COLUMN_EXTEND_SELECTION ||
key == FIRST_ROW ||
key == FIRST_ROW_EXTEND_SELECTION ||
key == LAST_COLUMN ||
key == LAST_COLUMN_EXTEND_SELECTION ||
key == LAST_ROW ||
key == LAST_ROW_EXTEND_SELECTION) {
if (table.isEditing() &&
!table.getCellEditor().stopCellEditing()) {
return;
}
// Unfortunately, this strategy introduces bugs because
// of the asynchronous nature of requestFocus() call below.
// Introducing a delay with invokeLater() makes this work
// in the typical case though race conditions then allow
// focus to disappear altogether. The right solution appears
// to be to fix requestFocus() so that it queues a request
// for the focus regardless of who owns the focus at the
// time the call to requestFocus() is made. The optimisation
// to ignore the call to requestFocus() when the component
// already has focus may ligitimately be made as the
// request focus event is dequeued, not before.
// boolean wasEditingWithFocus = table.isEditing() &&
// table.getEditorComponent().isFocusOwner();
boolean changeLead = false;
if (key == NEXT_ROW_CHANGE_LEAD || key == PREVIOUS_ROW_CHANGE_LEAD) {
changeLead = (rsm.getSelectionMode()
== ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
} else if (key == NEXT_COLUMN_CHANGE_LEAD || key == PREVIOUS_COLUMN_CHANGE_LEAD) {
changeLead = (csm.getSelectionMode()
== ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
}
if (changeLead) {
moveWithinTableRange(table, dx, dy);
if (dy != 0) {
// casting should be safe since the action is only enabled
// for DefaultListSelectionModel
((DefaultListSelectionModel)rsm).moveLeadSelectionIndex(leadRow);
if (getAdjustedLead(table, false, csm) == -1
&& table.getColumnCount() > 0) {
((DefaultListSelectionModel)csm).moveLeadSelectionIndex(0);
}
} else {
// casting should be safe since the action is only enabled
// for DefaultListSelectionModel
((DefaultListSelectionModel)csm).moveLeadSelectionIndex(leadColumn);
if (getAdjustedLead(table, true, rsm) == -1
&& table.getRowCount() > 0) {
((DefaultListSelectionModel)rsm).moveLeadSelectionIndex(0);
}
}
Rectangle cellRect = table.getCellRect(leadRow, leadColumn, false);
if (cellRect != null) {
table.scrollRectToVisible(cellRect);
}
} else if (!inSelection) {
moveWithinTableRange(table, dx, dy);
table.changeSelection(leadRow, leadColumn, false, extend);
}
else {
if (table.getRowCount() <= 0 || table.getColumnCount() <= 0) {
// bail - don't try to move selection on an empty table
return;
}
if (moveWithinSelectedRange(table, dx, dy, rsm, csm)) {
// this is the only way we have to set both the lead
// and the anchor without changing the selection
if (rsm.isSelectedIndex(leadRow)) {
rsm.addSelectionInterval(leadRow, leadRow);
} else {
rsm.removeSelectionInterval(leadRow, leadRow);
}
if (csm.isSelectedIndex(leadColumn)) {
csm.addSelectionInterval(leadColumn, leadColumn);
} else {
csm.removeSelectionInterval(leadColumn, leadColumn);
}
Rectangle cellRect = table.getCellRect(leadRow, leadColumn, false);
if (cellRect != null) {
table.scrollRectToVisible(cellRect);
}
}
else {
table.changeSelection(leadRow, leadColumn,
false, false);
}
}
/*
if (wasEditingWithFocus) {
table.editCellAt(leadRow, leadColumn);
final Component editorComp = table.getEditorComponent();
if (editorComp != null) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
editorComp.requestFocus();
}
});
}
}
*/
} else if (key == CANCEL_EDITING) {
table.removeEditor();
} else if (key == SELECT_ALL) {
table.selectAll();
} else if (key == CLEAR_SELECTION) {
table.clearSelection();
} else if (key == START_EDITING) {
if (!table.hasFocus()) {
CellEditor cellEditor = table.getCellEditor();
if (cellEditor != null && !cellEditor.stopCellEditing()) {
return;
}
table.requestFocus();
return;
}
table.editCellAt(leadRow, leadColumn, e);
Component editorComp = table.getEditorComponent();
if (editorComp != null) {
editorComp.requestFocus();
}
} else if (key == ADD_TO_SELECTION) {
if (!table.isCellSelected(leadRow, leadColumn)) {
int oldAnchorRow = rsm.getAnchorSelectionIndex();
int oldAnchorColumn = csm.getAnchorSelectionIndex();
rsm.setValueIsAdjusting(true);
csm.setValueIsAdjusting(true);
table.changeSelection(leadRow, leadColumn, true, false);
rsm.setAnchorSelectionIndex(oldAnchorRow);
csm.setAnchorSelectionIndex(oldAnchorColumn);
rsm.setValueIsAdjusting(false);
csm.setValueIsAdjusting(false);
}
} else if (key == TOGGLE_AND_ANCHOR) {
table.changeSelection(leadRow, leadColumn, true, false);
} else if (key == EXTEND_TO) {
table.changeSelection(leadRow, leadColumn, false, true);
} else if (key == MOVE_SELECTION_TO) {
table.changeSelection(leadRow, leadColumn, false, false);
} else if (key == FOCUS_HEADER) {
JTableHeader th = table.getTableHeader();
if (th != null) {
//Set the header's selected column to match the table.
int col = table.getSelectedColumn();
if (col >= 0) {
TableHeaderUI thUI = th.getUI();
if (thUI instanceof BasicTableHeaderUI) {
((BasicTableHeaderUI)thUI).selectColumn(col);
}
}
//Then give the header the focus.
th.requestFocusInWindow();
}
}
}
public boolean isEnabled(Object sender) {
String key = getName();
if (sender instanceof JTable &&
Boolean.TRUE.equals(((JTable)sender).getClientProperty("Table.isFileList"))) {
if (key == NEXT_COLUMN ||
key == NEXT_COLUMN_CELL ||
key == NEXT_COLUMN_EXTEND_SELECTION ||
key == NEXT_COLUMN_CHANGE_LEAD ||
key == PREVIOUS_COLUMN ||
key == PREVIOUS_COLUMN_CELL ||
key == PREVIOUS_COLUMN_EXTEND_SELECTION ||
key == PREVIOUS_COLUMN_CHANGE_LEAD ||
key == SCROLL_LEFT_CHANGE_SELECTION ||
key == SCROLL_LEFT_EXTEND_SELECTION ||
key == SCROLL_RIGHT_CHANGE_SELECTION ||
key == SCROLL_RIGHT_EXTEND_SELECTION ||
key == FIRST_COLUMN ||
key == FIRST_COLUMN_EXTEND_SELECTION ||
key == LAST_COLUMN ||
key == LAST_COLUMN_EXTEND_SELECTION ||
key == NEXT_ROW_CELL ||
key == PREVIOUS_ROW_CELL) {
return false;
}
}
if (key == CANCEL_EDITING && sender instanceof JTable) {
return ((JTable)sender).isEditing();
} else if (key == NEXT_ROW_CHANGE_LEAD ||
key == PREVIOUS_ROW_CHANGE_LEAD) {
// discontinuous selection actions are only enabled for
// DefaultListSelectionModel
return sender != null &&
((JTable)sender).getSelectionModel()
instanceof DefaultListSelectionModel;
} else if (key == NEXT_COLUMN_CHANGE_LEAD ||
key == PREVIOUS_COLUMN_CHANGE_LEAD) {
// discontinuous selection actions are only enabled for
// DefaultListSelectionModel
return sender != null &&
((JTable)sender).getColumnModel().getSelectionModel()
instanceof DefaultListSelectionModel;
} else if (key == ADD_TO_SELECTION && sender instanceof JTable) {
// This action is typically bound to SPACE.
// If the table is already in an editing mode, SPACE should
// simply enter a space character into the table, and not
// select a cell. Likewise, if the lead cell is already selected
// then hitting SPACE should just enter a space character
// into the cell and begin editing. In both of these cases
// this action will be disabled.
JTable table = (JTable)sender;
int leadRow = getAdjustedLead(table, true);
int leadCol = getAdjustedLead(table, false);
return !(table.isEditing() || table.isCellSelected(leadRow, leadCol));
} else if (key == FOCUS_HEADER && sender instanceof JTable) {
JTable table = (JTable)sender;
return table.getTableHeader() != null;
}
return true;
}
}
//
// The Table's Key listener
//
/**
* This class should be treated as a "protected" inner class.
* Instantiate it only within subclasses of {@code BasicTableUI}.
* <p>As of Java 2 platform v1.3 this class is no longer used.
* Instead <code>JTable</code>
* overrides <code>processKeyBinding</code> to dispatch the event to
* the current <code>TableCellEditor</code>.
*/
public class KeyHandler implements KeyListener {
// NOTE: This class exists only for backward compatibility. All
// its functionality has been moved into Handler. If you need to add
// new functionality add it to the Handler, but make sure this
// class calls into the Handler.
public void keyPressed(KeyEvent e) {
getHandler().keyPressed(e);
}
public void keyReleased(KeyEvent e) {
getHandler().keyReleased(e);
}
public void keyTyped(KeyEvent e) {
getHandler().keyTyped(e);
}
}
//
// The Table's focus listener
//
/**
* This class should be treated as a "protected" inner class.
* Instantiate it only within subclasses of {@code BasicTableUI}.
*/
public class FocusHandler implements FocusListener {
// NOTE: This class exists only for backward compatibility. All
// its functionality has been moved into Handler. If you need to add
// new functionality add it to the Handler, but make sure this
// class calls into the Handler.
public void focusGained(FocusEvent e) {
getHandler().focusGained(e);
}
public void focusLost(FocusEvent e) {
getHandler().focusLost(e);
}
}
//
// The Table's mouse and mouse motion listeners
//
/**
* This class should be treated as a "protected" inner class.
* Instantiate it only within subclasses of BasicTableUI.
*/
public class MouseInputHandler implements MouseInputListener {
// NOTE: This class exists only for backward compatibility. All
// its functionality has been moved into Handler. If you need to add
// new functionality add it to the Handler, but make sure this
// class calls into the Handler.
public void mouseClicked(MouseEvent e) {
getHandler().mouseClicked(e);
}
public void mousePressed(MouseEvent e) {
getHandler().mousePressed(e);
}
public void mouseReleased(MouseEvent e) {
getHandler().mouseReleased(e);
}
public void mouseEntered(MouseEvent e) {
getHandler().mouseEntered(e);
}
public void mouseExited(MouseEvent e) {
getHandler().mouseExited(e);
}
public void mouseMoved(MouseEvent e) {
getHandler().mouseMoved(e);
}
public void mouseDragged(MouseEvent e) {
getHandler().mouseDragged(e);
}
}
private class Handler implements FocusListener, MouseInputListener,
PropertyChangeListener, ListSelectionListener, ActionListener,
BeforeDrag {
// FocusListener
private void repaintLeadCell( ) {
int lr = getAdjustedLead(table, true);
int lc = getAdjustedLead(table, false);
if (lr < 0 || lc < 0) {
return;
}
Rectangle dirtyRect = table.getCellRect(lr, lc, false);
table.repaint(dirtyRect);
}
public void focusGained(FocusEvent e) {
repaintLeadCell();
}
public void focusLost(FocusEvent e) {
repaintLeadCell();
}
// KeyListener
public void keyPressed(KeyEvent e) { }
public void keyReleased(KeyEvent e) { }
public void keyTyped(KeyEvent e) {
KeyStroke keyStroke = KeyStroke.getKeyStroke(e.getKeyChar(),
e.getModifiers());
// We register all actions using ANCESTOR_OF_FOCUSED_COMPONENT
// which means that we might perform the appropriate action
// in the table and then forward it to the editor if the editor
// had focus. Make sure this doesn't happen by checking our
// InputMaps.
InputMap map = table.getInputMap(JComponent.WHEN_FOCUSED);
if (map != null && map.get(keyStroke) != null) {
return;
}
map = table.getInputMap(JComponent.
WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
if (map != null && map.get(keyStroke) != null) {
return;
}
keyStroke = KeyStroke.getKeyStrokeForEvent(e);
// The AWT seems to generate an unconsumed \r event when
// ENTER (\n) is pressed.
if (e.getKeyChar() == '\r') {
return;
}
int leadRow = getAdjustedLead(table, true);
int leadColumn = getAdjustedLead(table, false);
if (leadRow != -1 && leadColumn != -1 && !table.isEditing()) {
if (!table.editCellAt(leadRow, leadColumn)) {
return;
}
}
// Forwarding events this way seems to put the component
// in a state where it believes it has focus. In reality
// the table retains focus - though it is difficult for
// a user to tell, since the caret is visible and flashing.
// Calling table.requestFocus() here, to get the focus back to
// the table, seems to have no effect.
Component editorComp = table.getEditorComponent();
if (table.isEditing() && editorComp != null) {
if (editorComp instanceof JComponent) {
JComponent component = (JComponent)editorComp;
map = component.getInputMap(JComponent.WHEN_FOCUSED);
Object binding = (map != null) ? map.get(keyStroke) : null;
if (binding == null) {
map = component.getInputMap(JComponent.
WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
binding = (map != null) ? map.get(keyStroke) : null;
}
if (binding != null) {
ActionMap am = component.getActionMap();
Action action = (am != null) ? am.get(binding) : null;
if (action != null && SwingUtilities.
notifyAction(action, keyStroke, e, component,
e.getModifiers())) {
e.consume();
}
}
}
}
}
// MouseInputListener
// Component receiving mouse events during editing.
// May not be editorComponent.
private Component dispatchComponent;
public void mouseClicked(MouseEvent e) {}
private void setDispatchComponent(MouseEvent e) {
Component editorComponent = table.getEditorComponent();
Point p = e.getPoint();
Point p2 = SwingUtilities.convertPoint(table, p, editorComponent);
dispatchComponent =
SwingUtilities.getDeepestComponentAt(editorComponent,
p2.x, p2.y);
SwingUtilities2.setSkipClickCount(dispatchComponent,
e.getClickCount() - 1);
}
private boolean repostEvent(MouseEvent e) {
// Check for isEditing() in case another event has
// caused the editor to be removed. See bug #4306499.
if (dispatchComponent == null || !table.isEditing()) {
return false;
}
MouseEvent e2 = SwingUtilities.convertMouseEvent(table, e,
dispatchComponent);
dispatchComponent.dispatchEvent(e2);
return true;
}
private void setValueIsAdjusting(boolean flag) {
table.getSelectionModel().setValueIsAdjusting(flag);
table.getColumnModel().getSelectionModel().
setValueIsAdjusting(flag);
}
// The row and column where the press occurred and the
// press event itself
private int pressedRow;
private int pressedCol;
private MouseEvent pressedEvent;
// Whether or not the mouse press (which is being considered as part
// of a drag sequence) also caused the selection change to be fully
// processed.
private boolean dragPressDidSelection;
// Set to true when a drag gesture has been fully recognized and DnD
// begins. Use this to ignore further mouse events which could be
// delivered if DnD is cancelled (via ESCAPE for example)
private boolean dragStarted;
// Whether or not we should start the editing timer on release
private boolean shouldStartTimer;
// To cache the return value of pointOutsidePrefSize since we use
// it multiple times.
private boolean outsidePrefSize;
// Used to delay the start of editing.
private Timer timer = null;
private boolean canStartDrag() {
if (pressedRow == -1 || pressedCol == -1) {
return false;
}
if (isFileList) {
return !outsidePrefSize;
}
// if this is a single selection table
if ((table.getSelectionModel().getSelectionMode() ==
ListSelectionModel.SINGLE_SELECTION) &&
(table.getColumnModel().getSelectionModel().getSelectionMode() ==
ListSelectionModel.SINGLE_SELECTION)) {
return true;
}
return table.isCellSelected(pressedRow, pressedCol);
}
public void mousePressed(MouseEvent e) {
if (SwingUtilities2.shouldIgnore(e, table)) {
return;
}
if (table.isEditing() && !table.getCellEditor().stopCellEditing()) {
Component editorComponent = table.getEditorComponent();
if (editorComponent != null && !editorComponent.hasFocus()) {
SwingUtilities2.compositeRequestFocus(editorComponent);
}
return;
}
Point p = e.getPoint();
pressedRow = table.rowAtPoint(p);
pressedCol = table.columnAtPoint(p);
outsidePrefSize = pointOutsidePrefSize(pressedRow, pressedCol, p);
if (isFileList) {
shouldStartTimer =
table.isCellSelected(pressedRow, pressedCol) &&
!e.isShiftDown() &&
!BasicGraphicsUtils.isMenuShortcutKeyDown(e) &&
!outsidePrefSize;
}
if (table.getDragEnabled()) {
mousePressedDND(e);
} else {
SwingUtilities2.adjustFocus(table);
if (!isFileList) {
setValueIsAdjusting(true);
}
adjustSelection(e);
}
}
private void mousePressedDND(MouseEvent e) {
pressedEvent = e;
boolean grabFocus = true;
dragStarted = false;
if (canStartDrag() && DragRecognitionSupport.mousePressed(e)) {
dragPressDidSelection = false;
if (BasicGraphicsUtils.isMenuShortcutKeyDown(e) && isFileList) {
// do nothing for control - will be handled on release
// or when drag starts
return;
} else if (!e.isShiftDown() && table.isCellSelected(pressedRow, pressedCol)) {
// clicking on something that's already selected
// and need to make it the lead now
table.getSelectionModel().addSelectionInterval(pressedRow,
pressedRow);
table.getColumnModel().getSelectionModel().
addSelectionInterval(pressedCol, pressedCol);
return;
}
dragPressDidSelection = true;
// could be a drag initiating event - don't grab focus
grabFocus = false;
} else if (!isFileList) {
// When drag can't happen, mouse drags might change the selection in the table
// so we want the isAdjusting flag to be set
setValueIsAdjusting(true);
}
if (grabFocus) {
SwingUtilities2.adjustFocus(table);
}
adjustSelection(e);
}
private void adjustSelection(MouseEvent e) {
// Fix for 4835633
if (outsidePrefSize) {
// If shift is down in multi-select, we should just return.
// For single select or non-shift-click, clear the selection
if (e.getID() == MouseEvent.MOUSE_PRESSED &&
(!e.isShiftDown() ||
table.getSelectionModel().getSelectionMode() ==
ListSelectionModel.SINGLE_SELECTION)) {
table.clearSelection();
TableCellEditor tce = table.getCellEditor();
if (tce != null) {
tce.stopCellEditing();
}
}
return;
}
// The autoscroller can generate drag events outside the
// table's range.
if ((pressedCol == -1) || (pressedRow == -1)) {
return;
}
boolean dragEnabled = table.getDragEnabled();
if (!dragEnabled && !isFileList && table.editCellAt(pressedRow, pressedCol, e)) {
setDispatchComponent(e);
repostEvent(e);
}
CellEditor editor = table.getCellEditor();
if (dragEnabled || editor == null || editor.shouldSelectCell(e)) {
table.changeSelection(pressedRow, pressedCol,
BasicGraphicsUtils.isMenuShortcutKeyDown(e),
e.isShiftDown());
}
}
public void valueChanged(ListSelectionEvent e) {
if (timer != null) {
timer.stop();
timer = null;
}
}
public void actionPerformed(ActionEvent ae) {
table.editCellAt(pressedRow, pressedCol, null);
Component editorComponent = table.getEditorComponent();
if (editorComponent != null && !editorComponent.hasFocus()) {
SwingUtilities2.compositeRequestFocus(editorComponent);
}
return;
}
private void maybeStartTimer() {
if (!shouldStartTimer) {
return;
}
if (timer == null) {
timer = new Timer(1200, this);
timer.setRepeats(false);
}
timer.start();
}
public void mouseReleased(MouseEvent e) {
if (SwingUtilities2.shouldIgnore(e, table)) {
return;
}
if (table.getDragEnabled()) {
mouseReleasedDND(e);
} else {
if (isFileList) {
maybeStartTimer();
}
}
pressedEvent = null;
repostEvent(e);
dispatchComponent = null;
setValueIsAdjusting(false);
}
private void mouseReleasedDND(MouseEvent e) {
MouseEvent me = DragRecognitionSupport.mouseReleased(e);
if (me != null) {
SwingUtilities2.adjustFocus(table);
if (!dragPressDidSelection) {
adjustSelection(me);
}
}
if (!dragStarted) {
if (isFileList) {
maybeStartTimer();
return;
}
Point p = e.getPoint();
if (pressedEvent != null &&
table.rowAtPoint(p) == pressedRow &&
table.columnAtPoint(p) == pressedCol &&
table.editCellAt(pressedRow, pressedCol, pressedEvent)) {
setDispatchComponent(pressedEvent);
repostEvent(pressedEvent);
// This may appear completely odd, but must be done for backward
// compatibility reasons. Developers have been known to rely on
// a call to shouldSelectCell after editing has begun.
CellEditor ce = table.getCellEditor();
if (ce != null) {
ce.shouldSelectCell(pressedEvent);
}
}
}
}
public void mouseEntered(MouseEvent e) {}
public void mouseExited(MouseEvent e) {}
public void mouseMoved(MouseEvent e) {}
public void dragStarting(MouseEvent me) {
dragStarted = true;
if (BasicGraphicsUtils.isMenuShortcutKeyDown(me) && isFileList) {
table.getSelectionModel().addSelectionInterval(pressedRow,
pressedRow);
table.getColumnModel().getSelectionModel().
addSelectionInterval(pressedCol, pressedCol);
}
pressedEvent = null;
}
public void mouseDragged(MouseEvent e) {
if (SwingUtilities2.shouldIgnore(e, table)) {
return;
}
if (table.getDragEnabled() &&
(DragRecognitionSupport.mouseDragged(e, this) || dragStarted)) {
return;
}
repostEvent(e);
// Check isFileList:
// Until we support drag-selection, dragging should not change
// the selection (act like single-select).
if (isFileList || table.isEditing()) {
return;
}
Point p = e.getPoint();
int row = table.rowAtPoint(p);
int column = table.columnAtPoint(p);
// The autoscroller can generate drag events outside the
// table's range.
if ((column == -1) || (row == -1)) {
return;
}
table.changeSelection(row, column,
BasicGraphicsUtils.isMenuShortcutKeyDown(e), true);
}
// PropertyChangeListener
public void propertyChange(PropertyChangeEvent event) {
String changeName = event.getPropertyName();
if ("componentOrientation" == changeName) {
InputMap inputMap = getInputMap(
JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
SwingUtilities.replaceUIInputMap(table,
JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT,
inputMap);
JTableHeader header = table.getTableHeader();
if (header != null) {
header.setComponentOrientation(
(ComponentOrientation)event.getNewValue());
}
} else if ("dropLocation" == changeName) {
JTable.DropLocation oldValue = (JTable.DropLocation)event.getOldValue();
repaintDropLocation(oldValue);
repaintDropLocation(table.getDropLocation());
} else if ("Table.isFileList" == changeName) {
isFileList = Boolean.TRUE.equals(table.getClientProperty("Table.isFileList"));
table.revalidate();
table.repaint();
if (isFileList) {
table.getSelectionModel().addListSelectionListener(getHandler());
} else {
table.getSelectionModel().removeListSelectionListener(getHandler());
timer = null;
}
} else if ("selectionModel" == changeName) {
if (isFileList) {
ListSelectionModel old = (ListSelectionModel)event.getOldValue();
old.removeListSelectionListener(getHandler());
table.getSelectionModel().addListSelectionListener(getHandler());
}
}
}
private void repaintDropLocation(JTable.DropLocation loc) {
if (loc == null) {
return;
}
if (!loc.isInsertRow() && !loc.isInsertColumn()) {
Rectangle rect = table.getCellRect(loc.getRow(), loc.getColumn(), false);
if (rect != null) {
table.repaint(rect);
}
return;
}
if (loc.isInsertRow()) {
Rectangle rect = extendRect(getHDropLineRect(loc), true);
if (rect != null) {
table.repaint(rect);
}
}
if (loc.isInsertColumn()) {
Rectangle rect = extendRect(getVDropLineRect(loc), false);
if (rect != null) {
table.repaint(rect);
}
}
}
}
/*
* Returns true if the given point is outside the preferredSize of the
* item at the given row of the table. (Column must be 0).
* Returns false if the "Table.isFileList" client property is not set.
*/
private boolean pointOutsidePrefSize(int row, int column, Point p) {
if (!isFileList) {
return false;
}
return SwingUtilities2.pointOutsidePrefSize(table, row, column, p);
}
//
// Factory methods for the Listeners
//
private Handler getHandler() {
if (handler == null) {
handler = new Handler();
}
return handler;
}
/**
* Creates the key listener for handling keyboard navigation in the JTable.
*/
protected KeyListener createKeyListener() {
return null;
}
/**
* Creates the focus listener for handling keyboard navigation in the JTable.
*/
protected FocusListener createFocusListener() {
return getHandler();
}
/**
* Creates the mouse listener for the JTable.
*/
protected MouseInputListener createMouseInputListener() {
return getHandler();
}
//
// The installation/uninstall procedures and support
//
public static ComponentUI createUI(JComponent c) {
return new BasicTableUI();
}
// Installation
public void installUI(JComponent c) {
table = (JTable)c;
rendererPane = new CellRendererPane();
table.add(rendererPane);
installDefaults();
installDefaults2();
installListeners();
installKeyboardActions();
}
/**
* Initialize JTable properties, e.g. font, foreground, and background.
* The font, foreground, and background properties are only set if their
* current value is either null or a UIResource, other properties are set
* if the current value is null.
*
* @see #installUI
*/
protected void installDefaults() {
LookAndFeel.installColorsAndFont(table, "Table.background",
"Table.foreground", "Table.font");
// JTable's original row height is 16. To correctly display the
// contents on Linux we should have set it to 18, Windows 19 and
// Solaris 20. As these values vary so much it's too hard to
// be backward compatable and try to update the row height, we're
// therefor NOT going to adjust the row height based on font. If the
// developer changes the font, it's there responsability to update
// the row height.
LookAndFeel.installProperty(table, "opaque", Boolean.TRUE);
Color sbg = table.getSelectionBackground();
if (sbg == null || sbg instanceof UIResource) {
sbg = UIManager.getColor("Table.selectionBackground");
table.setSelectionBackground(sbg != null ? sbg : UIManager.getColor("textHighlight"));
}
Color sfg = table.getSelectionForeground();
if (sfg == null || sfg instanceof UIResource) {
sfg = UIManager.getColor("Table.selectionForeground");
table.setSelectionForeground(sfg != null ? sfg : UIManager.getColor("textHighlightText"));
}
Color gridColor = table.getGridColor();
if (gridColor == null || gridColor instanceof UIResource) {
gridColor = UIManager.getColor("Table.gridColor");
table.setGridColor(gridColor != null ? gridColor : Color.GRAY);
}
// install the scrollpane border
Container parent = SwingUtilities.getUnwrappedParent(table); // should be viewport
if (parent != null) {
parent = parent.getParent(); // should be the scrollpane
if (parent != null && parent instanceof JScrollPane) {
LookAndFeel.installBorder((JScrollPane)parent, "Table.scrollPaneBorder");
}
}
isFileList = Boolean.TRUE.equals(table.getClientProperty("Table.isFileList"));
}
private void installDefaults2() {
TransferHandler th = table.getTransferHandler();
if (th == null || th instanceof UIResource) {
table.setTransferHandler(defaultTransferHandler);
// default TransferHandler doesn't support drop
// so we don't want drop handling
if (table.getDropTarget() instanceof UIResource) {
table.setDropTarget(null);
}
}
}
/**
* Attaches listeners to the JTable.
*/
protected void installListeners() {
focusListener = createFocusListener();
keyListener = createKeyListener();
mouseInputListener = createMouseInputListener();
table.addFocusListener(focusListener);
table.addKeyListener(keyListener);
table.addMouseListener(mouseInputListener);
table.addMouseMotionListener(mouseInputListener);
table.addPropertyChangeListener(getHandler());
if (isFileList) {
table.getSelectionModel().addListSelectionListener(getHandler());
}
}
/**
* Register all keyboard actions on the JTable.
*/
protected void installKeyboardActions() {
LazyActionMap.installLazyActionMap(table, BasicTableUI.class,
"Table.actionMap");
InputMap inputMap = getInputMap(JComponent.
WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
SwingUtilities.replaceUIInputMap(table,
JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT,
inputMap);
}
InputMap getInputMap(int condition) {
if (condition == JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT) {
InputMap keyMap =
(InputMap)DefaultLookup.get(table, this,
"Table.ancestorInputMap");
InputMap rtlKeyMap;
if (table.getComponentOrientation().isLeftToRight() ||
((rtlKeyMap = (InputMap)DefaultLookup.get(table, this,
"Table.ancestorInputMap.RightToLeft")) == null)) {
return keyMap;
} else {
rtlKeyMap.setParent(keyMap);
return rtlKeyMap;
}
}
return null;
}
static void loadActionMap(LazyActionMap map) {
// IMPORTANT: There is a very close coupling between the parameters
// passed to the Actions constructor. Only certain parameter
// combinations are supported. For example, the following Action would
// not work as expected:
// new Actions(Actions.NEXT_ROW_CELL, 1, 4, false, true)
// Actions which move within the selection only (having a true
// inSelection parameter) require that one of dx or dy be
// zero and the other be -1 or 1. The point of this warning is
// that you should be very careful about making sure a particular
// combination of parameters is supported before changing or
// adding anything here.
map.put(new Actions(Actions.NEXT_COLUMN, 1, 0,
false, false));
map.put(new Actions(Actions.NEXT_COLUMN_CHANGE_LEAD, 1, 0,
false, false));
map.put(new Actions(Actions.PREVIOUS_COLUMN, -1, 0,
false, false));
map.put(new Actions(Actions.PREVIOUS_COLUMN_CHANGE_LEAD, -1, 0,
false, false));
map.put(new Actions(Actions.NEXT_ROW, 0, 1,
false, false));
map.put(new Actions(Actions.NEXT_ROW_CHANGE_LEAD, 0, 1,
false, false));
map.put(new Actions(Actions.PREVIOUS_ROW, 0, -1,
false, false));
map.put(new Actions(Actions.PREVIOUS_ROW_CHANGE_LEAD, 0, -1,
false, false));
map.put(new Actions(Actions.NEXT_COLUMN_EXTEND_SELECTION,
1, 0, true, false));
map.put(new Actions(Actions.PREVIOUS_COLUMN_EXTEND_SELECTION,
-1, 0, true, false));
map.put(new Actions(Actions.NEXT_ROW_EXTEND_SELECTION,
0, 1, true, false));
map.put(new Actions(Actions.PREVIOUS_ROW_EXTEND_SELECTION,
0, -1, true, false));
map.put(new Actions(Actions.SCROLL_UP_CHANGE_SELECTION,
false, false, true, false));
map.put(new Actions(Actions.SCROLL_DOWN_CHANGE_SELECTION,
false, true, true, false));
map.put(new Actions(Actions.FIRST_COLUMN,
false, false, false, true));
map.put(new Actions(Actions.LAST_COLUMN,
false, true, false, true));
map.put(new Actions(Actions.SCROLL_UP_EXTEND_SELECTION,
true, false, true, false));
map.put(new Actions(Actions.SCROLL_DOWN_EXTEND_SELECTION,
true, true, true, false));
map.put(new Actions(Actions.FIRST_COLUMN_EXTEND_SELECTION,
true, false, false, true));
map.put(new Actions(Actions.LAST_COLUMN_EXTEND_SELECTION,
true, true, false, true));
map.put(new Actions(Actions.FIRST_ROW, false, false, true, true));
map.put(new Actions(Actions.LAST_ROW, false, true, true, true));
map.put(new Actions(Actions.FIRST_ROW_EXTEND_SELECTION,
true, false, true, true));
map.put(new Actions(Actions.LAST_ROW_EXTEND_SELECTION,
true, true, true, true));
map.put(new Actions(Actions.NEXT_COLUMN_CELL,
1, 0, false, true));
map.put(new Actions(Actions.PREVIOUS_COLUMN_CELL,
-1, 0, false, true));
map.put(new Actions(Actions.NEXT_ROW_CELL, 0, 1, false, true));
map.put(new Actions(Actions.PREVIOUS_ROW_CELL,
0, -1, false, true));
map.put(new Actions(Actions.SELECT_ALL));
map.put(new Actions(Actions.CLEAR_SELECTION));
map.put(new Actions(Actions.CANCEL_EDITING));
map.put(new Actions(Actions.START_EDITING));
map.put(TransferHandler.getCutAction().getValue(Action.NAME),
TransferHandler.getCutAction());
map.put(TransferHandler.getCopyAction().getValue(Action.NAME),
TransferHandler.getCopyAction());
map.put(TransferHandler.getPasteAction().getValue(Action.NAME),
TransferHandler.getPasteAction());
map.put(new Actions(Actions.SCROLL_LEFT_CHANGE_SELECTION,
false, false, false, false));
map.put(new Actions(Actions.SCROLL_RIGHT_CHANGE_SELECTION,
false, true, false, false));
map.put(new Actions(Actions.SCROLL_LEFT_EXTEND_SELECTION,
true, false, false, false));
map.put(new Actions(Actions.SCROLL_RIGHT_EXTEND_SELECTION,
true, true, false, false));
map.put(new Actions(Actions.ADD_TO_SELECTION));
map.put(new Actions(Actions.TOGGLE_AND_ANCHOR));
map.put(new Actions(Actions.EXTEND_TO));
map.put(new Actions(Actions.MOVE_SELECTION_TO));
map.put(new Actions(Actions.FOCUS_HEADER));
}
// Uninstallation
public void uninstallUI(JComponent c) {
uninstallDefaults();
uninstallListeners();
uninstallKeyboardActions();
table.remove(rendererPane);
rendererPane = null;
table = null;
}
protected void uninstallDefaults() {
if (table.getTransferHandler() instanceof UIResource) {
table.setTransferHandler(null);
}
}
protected void uninstallListeners() {
table.removeFocusListener(focusListener);
table.removeKeyListener(keyListener);
table.removeMouseListener(mouseInputListener);
table.removeMouseMotionListener(mouseInputListener);
table.removePropertyChangeListener(getHandler());
if (isFileList) {
table.getSelectionModel().removeListSelectionListener(getHandler());
}
focusListener = null;
keyListener = null;
mouseInputListener = null;
handler = null;
}
protected void uninstallKeyboardActions() {
SwingUtilities.replaceUIInputMap(table, JComponent.
WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, null);
SwingUtilities.replaceUIActionMap(table, null);
}
/**
* Returns the baseline.
*
* @throws NullPointerException {@inheritDoc}
* @throws IllegalArgumentException {@inheritDoc}
* @see javax.swing.JComponent#getBaseline(int, int)
* @since 1.6
*/
public int getBaseline(JComponent c, int width, int height) {
super.getBaseline(c, width, height);
UIDefaults lafDefaults = UIManager.getLookAndFeelDefaults();
Component renderer = (Component)lafDefaults.get(
BASELINE_COMPONENT_KEY);
if (renderer == null) {
DefaultTableCellRenderer tcr = new DefaultTableCellRenderer();
renderer = tcr.getTableCellRendererComponent(
table, "a", false, false, -1, -1);
lafDefaults.put(BASELINE_COMPONENT_KEY, renderer);
}
renderer.setFont(table.getFont());
int rowMargin = table.getRowMargin();
return renderer.getBaseline(Integer.MAX_VALUE, table.getRowHeight() -
rowMargin) + rowMargin / 2;
}
/**
* Returns an enum indicating how the baseline of the component
* changes as the size changes.
*
* @throws NullPointerException {@inheritDoc}
* @see javax.swing.JComponent#getBaseline(int, int)
* @since 1.6
*/
public Component.BaselineResizeBehavior getBaselineResizeBehavior(
JComponent c) {
super.getBaselineResizeBehavior(c);
return Component.BaselineResizeBehavior.CONSTANT_ASCENT;
}
//
// Size Methods
//
private Dimension createTableSize(long width) {
int height = 0;
int rowCount = table.getRowCount();
if (rowCount > 0 && table.getColumnCount() > 0) {
Rectangle r = table.getCellRect(rowCount-1, 0, true);
height = r.y + r.height;
}
// Width is always positive. The call to abs() is a workaround for
// a bug in the 1.1.6 JIT on Windows.
long tmp = Math.abs(width);
if (tmp > Integer.MAX_VALUE) {
tmp = Integer.MAX_VALUE;
}
return new Dimension((int)tmp, height);
}
/**
* Return the minimum size of the table. The minimum height is the
* row height times the number of rows.
* The minimum width is the sum of the minimum widths of each column.
*/
public Dimension getMinimumSize(JComponent c) {
long width = 0;
Enumeration enumeration = table.getColumnModel().getColumns();
while (enumeration.hasMoreElements()) {
TableColumn aColumn = (TableColumn)enumeration.nextElement();
width = width + aColumn.getMinWidth();
}
return createTableSize(width);
}
/**
* Return the preferred size of the table. The preferred height is the
* row height times the number of rows.
* The preferred width is the sum of the preferred widths of each column.
*/
public Dimension getPreferredSize(JComponent c) {
long width = 0;
Enumeration enumeration = table.getColumnModel().getColumns();
while (enumeration.hasMoreElements()) {
TableColumn aColumn = (TableColumn)enumeration.nextElement();
width = width + aColumn.getPreferredWidth();
}
return createTableSize(width);
}
/**
* Return the maximum size of the table. The maximum height is the
* row heighttimes the number of rows.
* The maximum width is the sum of the maximum widths of each column.
*/
public Dimension getMaximumSize(JComponent c) {
long width = 0;
Enumeration enumeration = table.getColumnModel().getColumns();
while (enumeration.hasMoreElements()) {
TableColumn aColumn = (TableColumn)enumeration.nextElement();
width = width + aColumn.getMaxWidth();
}
return createTableSize(width);
}
//
// Paint methods and support
//
/** Paint a representation of the <code>table</code> instance
* that was set in installUI().
*/
public void paint(Graphics g, JComponent c) {
Rectangle clip = g.getClipBounds();
Rectangle bounds = table.getBounds();
// account for the fact that the graphics has already been translated
// into the table's bounds
bounds.x = bounds.y = 0;
if (table.getRowCount() <= 0 || table.getColumnCount() <= 0 ||
// this check prevents us from painting the entire table
// when the clip doesn't intersect our bounds at all
!bounds.intersects(clip)) {
paintDropLines(g);
return;
}
boolean ltr = table.getComponentOrientation().isLeftToRight();
Point upperLeft = clip.getLocation();
Point lowerRight = new Point(clip.x + clip.width - 1,
clip.y + clip.height - 1);
int rMin = table.rowAtPoint(upperLeft);
int rMax = table.rowAtPoint(lowerRight);
// This should never happen (as long as our bounds intersect the clip,
// which is why we bail above if that is the case).
if (rMin == -1) {
rMin = 0;
}
// If the table does not have enough rows to fill the view we'll get -1.
// (We could also get -1 if our bounds don't intersect the clip,
// which is why we bail above if that is the case).
// Replace this with the index of the last row.
if (rMax == -1) {
rMax = table.getRowCount()-1;
}
int cMin = table.columnAtPoint(ltr ? upperLeft : lowerRight);
int cMax = table.columnAtPoint(ltr ? lowerRight : upperLeft);
// This should never happen.
if (cMin == -1) {
cMin = 0;
}
// If the table does not have enough columns to fill the view we'll get -1.
// Replace this with the index of the last column.
if (cMax == -1) {
cMax = table.getColumnCount()-1;
}
// Paint the grid.
paintGrid(g, rMin, rMax, cMin, cMax);
// Paint the cells.
paintCells(g, rMin, rMax, cMin, cMax);
paintDropLines(g);
}
private void paintDropLines(Graphics g) {
JTable.DropLocation loc = table.getDropLocation();
if (loc == null) {
return;
}
Color color = UIManager.getColor("Table.dropLineColor");
Color shortColor = UIManager.getColor("Table.dropLineShortColor");
if (color == null && shortColor == null) {
return;
}
Rectangle rect;
rect = getHDropLineRect(loc);
if (rect != null) {
int x = rect.x;
int w = rect.width;
if (color != null) {
extendRect(rect, true);
g.setColor(color);
g.fillRect(rect.x, rect.y, rect.width, rect.height);
}
if (!loc.isInsertColumn() && shortColor != null) {
g.setColor(shortColor);
g.fillRect(x, rect.y, w, rect.height);
}
}
rect = getVDropLineRect(loc);
if (rect != null) {
int y = rect.y;
int h = rect.height;
if (color != null) {
extendRect(rect, false);
g.setColor(color);
g.fillRect(rect.x, rect.y, rect.width, rect.height);
}
if (!loc.isInsertRow() && shortColor != null) {
g.setColor(shortColor);
g.fillRect(rect.x, y, rect.width, h);
}
}
}
private Rectangle getHDropLineRect(JTable.DropLocation loc) {
if (!loc.isInsertRow()) {
return null;
}
int row = loc.getRow();
int col = loc.getColumn();
if (col >= table.getColumnCount()) {
col--;
}
Rectangle rect = table.getCellRect(row, col, true);
if (row >= table.getRowCount()) {
row--;
Rectangle prevRect = table.getCellRect(row, col, true);
rect.y = prevRect.y + prevRect.height;
}
if (rect.y == 0) {
rect.y = -1;
} else {
rect.y -= 2;
}
rect.height = 3;
return rect;
}
private Rectangle getVDropLineRect(JTable.DropLocation loc) {
if (!loc.isInsertColumn()) {
return null;
}
boolean ltr = table.getComponentOrientation().isLeftToRight();
int col = loc.getColumn();
Rectangle rect = table.getCellRect(loc.getRow(), col, true);
if (col >= table.getColumnCount()) {
col--;
rect = table.getCellRect(loc.getRow(), col, true);
if (ltr) {
rect.x = rect.x + rect.width;
}
} else if (!ltr) {
rect.x = rect.x + rect.width;
}
if (rect.x == 0) {
rect.x = -1;
} else {
rect.x -= 2;
}
rect.width = 3;
return rect;
}
private Rectangle extendRect(Rectangle rect, boolean horizontal) {
if (rect == null) {
return rect;
}
if (horizontal) {
rect.x = 0;
rect.width = table.getWidth();
} else {
rect.y = 0;
if (table.getRowCount() != 0) {
Rectangle lastRect = table.getCellRect(table.getRowCount() - 1, 0, true);
rect.height = lastRect.y + lastRect.height;
} else {
rect.height = table.getHeight();
}
}
return rect;
}
/*
* Paints the grid lines within <I>aRect</I>, using the grid
* color set with <I>setGridColor</I>. Paints vertical lines
* if <code>getShowVerticalLines()</code> returns true and paints
* horizontal lines if <code>getShowHorizontalLines()</code>
* returns true.
*/
private void paintGrid(Graphics g, int rMin, int rMax, int cMin, int cMax) {
g.setColor(table.getGridColor());
Rectangle minCell = table.getCellRect(rMin, cMin, true);
Rectangle maxCell = table.getCellRect(rMax, cMax, true);
Rectangle damagedArea = minCell.union( maxCell );
if (table.getShowHorizontalLines()) {
int tableWidth = damagedArea.x + damagedArea.width;
int y = damagedArea.y;
for (int row = rMin; row <= rMax; row++) {
y += table.getRowHeight(row);
g.drawLine(damagedArea.x, y - 1, tableWidth - 1, y - 1);
}
}
if (table.getShowVerticalLines()) {
TableColumnModel cm = table.getColumnModel();
int tableHeight = damagedArea.y + damagedArea.height;
int x;
if (table.getComponentOrientation().isLeftToRight()) {
x = damagedArea.x;
for (int column = cMin; column <= cMax; column++) {
int w = cm.getColumn(column).getWidth();
x += w;
g.drawLine(x - 1, 0, x - 1, tableHeight - 1);
}
} else {
x = damagedArea.x;
for (int column = cMax; column >= cMin; column--) {
int w = cm.getColumn(column).getWidth();
x += w;
g.drawLine(x - 1, 0, x - 1, tableHeight - 1);
}
}
}
}
private int viewIndexForColumn(TableColumn aColumn) {
TableColumnModel cm = table.getColumnModel();
for (int column = 0; column < cm.getColumnCount(); column++) {
if (cm.getColumn(column) == aColumn) {
return column;
}
}
return -1;
}
private void paintCells(Graphics g, int rMin, int rMax, int cMin, int cMax) {
JTableHeader header = table.getTableHeader();
TableColumn draggedColumn = (header == null) ? null : header.getDraggedColumn();
/**代码未完, 请加载全部代码(NowJava.com).**/
关注时代Java
关注时代Java