Java example source code file (BasicTableHeaderUI.java)
The BasicTableHeaderUI.java Java example source code
/*
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* 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
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package javax.swing.plaf.basic;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.plaf.*;
import javax.swing.table.*;
import sun.swing.*;
/**
* BasicTableHeaderUI implementation
*
* @author Alan Chung
* @author Philip Milne
*/
public class BasicTableHeaderUI extends TableHeaderUI {
private static Cursor resizeCursor = Cursor.getPredefinedCursor(Cursor.E_RESIZE_CURSOR);
//
// Instance Variables
//
/** The JTableHeader that is delegating the painting to this UI. */
protected JTableHeader header;
protected CellRendererPane rendererPane;
// Listeners that are attached to the JTable
protected MouseInputListener mouseInputListener;
// The column header over which the mouse currently is.
private int rolloverColumn = -1;
// The column that should be highlighted when the table header has the focus.
private int selectedColumnIndex = 0; // Read ONLY via getSelectedColumnIndex!
private static FocusListener focusListener = new FocusListener() {
public void focusGained(FocusEvent e) {
repaintHeader(e.getSource());
}
public void focusLost(FocusEvent e) {
repaintHeader(e.getSource());
}
private void repaintHeader(Object source) {
if (source instanceof JTableHeader) {
JTableHeader th = (JTableHeader)source;
BasicTableHeaderUI ui =
(BasicTableHeaderUI)BasicLookAndFeel.
getUIOfType(th.getUI(),
BasicTableHeaderUI.class);
if (ui == null) {
return;
}
th.repaint(th.getHeaderRect(ui.getSelectedColumnIndex()));
}
}
};
/**
* This class should be treated as a "protected" inner class.
* Instantiate it only within subclasses of {@code BasicTableHeaderUI}.
*/
public class MouseInputHandler implements MouseInputListener {
private int mouseXOffset;
private Cursor otherCursor = resizeCursor;
public void mouseClicked(MouseEvent e) {
if (!header.isEnabled()) {
return;
}
if (e.getClickCount() % 2 == 1 &&
SwingUtilities.isLeftMouseButton(e)) {
JTable table = header.getTable();
RowSorter sorter;
if (table != null && (sorter = table.getRowSorter()) != null) {
int columnIndex = header.columnAtPoint(e.getPoint());
if (columnIndex != -1) {
columnIndex = table.convertColumnIndexToModel(
columnIndex);
sorter.toggleSortOrder(columnIndex);
}
}
}
}
private TableColumn getResizingColumn(Point p) {
return getResizingColumn(p, header.columnAtPoint(p));
}
private TableColumn getResizingColumn(Point p, int column) {
if (column == -1) {
return null;
}
Rectangle r = header.getHeaderRect(column);
r.grow(-3, 0);
if (r.contains(p)) {
return null;
}
int midPoint = r.x + r.width/2;
int columnIndex;
if( header.getComponentOrientation().isLeftToRight() ) {
columnIndex = (p.x < midPoint) ? column - 1 : column;
} else {
columnIndex = (p.x < midPoint) ? column : column - 1;
}
if (columnIndex == -1) {
return null;
}
return header.getColumnModel().getColumn(columnIndex);
}
public void mousePressed(MouseEvent e) {
if (!header.isEnabled()) {
return;
}
header.setDraggedColumn(null);
header.setResizingColumn(null);
header.setDraggedDistance(0);
Point p = e.getPoint();
// First find which header cell was hit
TableColumnModel columnModel = header.getColumnModel();
int index = header.columnAtPoint(p);
if (index != -1) {
// The last 3 pixels + 3 pixels of next column are for resizing
TableColumn resizingColumn = getResizingColumn(p, index);
if (canResize(resizingColumn, header)) {
header.setResizingColumn(resizingColumn);
if( header.getComponentOrientation().isLeftToRight() ) {
mouseXOffset = p.x - resizingColumn.getWidth();
} else {
mouseXOffset = p.x + resizingColumn.getWidth();
}
}
else if (header.getReorderingAllowed()) {
TableColumn hitColumn = columnModel.getColumn(index);
header.setDraggedColumn(hitColumn);
mouseXOffset = p.x;
}
}
if (header.getReorderingAllowed()) {
int oldRolloverColumn = rolloverColumn;
rolloverColumn = -1;
rolloverColumnUpdated(oldRolloverColumn, rolloverColumn);
}
}
private void swapCursor() {
Cursor tmp = header.getCursor();
header.setCursor(otherCursor);
otherCursor = tmp;
}
public void mouseMoved(MouseEvent e) {
if (!header.isEnabled()) {
return;
}
if (canResize(getResizingColumn(e.getPoint()), header) !=
(header.getCursor() == resizeCursor)) {
swapCursor();
}
updateRolloverColumn(e);
}
public void mouseDragged(MouseEvent e) {
if (!header.isEnabled()) {
return;
}
int mouseX = e.getX();
TableColumn resizingColumn = header.getResizingColumn();
TableColumn draggedColumn = header.getDraggedColumn();
boolean headerLeftToRight = header.getComponentOrientation().isLeftToRight();
if (resizingColumn != null) {
int oldWidth = resizingColumn.getWidth();
int newWidth;
if (headerLeftToRight) {
newWidth = mouseX - mouseXOffset;
} else {
newWidth = mouseXOffset - mouseX;
}
mouseXOffset += changeColumnWidth(resizingColumn, header,
oldWidth, newWidth);
}
else if (draggedColumn != null) {
TableColumnModel cm = header.getColumnModel();
int draggedDistance = mouseX - mouseXOffset;
int direction = (draggedDistance < 0) ? -1 : 1;
int columnIndex = viewIndexForColumn(draggedColumn);
int newColumnIndex = columnIndex + (headerLeftToRight ? direction : -direction);
if (0 <= newColumnIndex && newColumnIndex < cm.getColumnCount()) {
int width = cm.getColumn(newColumnIndex).getWidth();
if (Math.abs(draggedDistance) > (width / 2)) {
mouseXOffset = mouseXOffset + direction * width;
header.setDraggedDistance(draggedDistance - direction * width);
//Cache the selected column.
int selectedIndex =
SwingUtilities2.convertColumnIndexToModel(
header.getColumnModel(),
getSelectedColumnIndex());
//Now do the move.
cm.moveColumn(columnIndex, newColumnIndex);
//Update the selected index.
selectColumn(
SwingUtilities2.convertColumnIndexToView(
header.getColumnModel(), selectedIndex),
false);
return;
}
}
setDraggedDistance(draggedDistance, columnIndex);
}
updateRolloverColumn(e);
}
public void mouseReleased(MouseEvent e) {
if (!header.isEnabled()) {
return;
}
setDraggedDistance(0, viewIndexForColumn(header.getDraggedColumn()));
header.setResizingColumn(null);
header.setDraggedColumn(null);
updateRolloverColumn(e);
}
public void mouseEntered(MouseEvent e) {
if (!header.isEnabled()) {
return;
}
updateRolloverColumn(e);
}
public void mouseExited(MouseEvent e) {
if (!header.isEnabled()) {
return;
}
int oldRolloverColumn = rolloverColumn;
rolloverColumn = -1;
rolloverColumnUpdated(oldRolloverColumn, rolloverColumn);
}
//
// Protected & Private Methods
//
private void setDraggedDistance(int draggedDistance, int column) {
header.setDraggedDistance(draggedDistance);
if (column != -1) {
header.getColumnModel().moveColumn(column, column);
}
}
}
//
// Factory methods for the Listeners
//
/**
* Creates the mouse listener for the JTableHeader.
*/
protected MouseInputListener createMouseInputListener() {
return new MouseInputHandler();
}
//
// The installation/uninstall procedures and support
//
public static ComponentUI createUI(JComponent h) {
return new BasicTableHeaderUI();
}
// Installation
public void installUI(JComponent c) {
header = (JTableHeader)c;
rendererPane = new CellRendererPane();
header.add(rendererPane);
installDefaults();
installListeners();
installKeyboardActions();
}
/**
* Initializes JTableHeader properties such as 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(header, "TableHeader.background",
"TableHeader.foreground", "TableHeader.font");
LookAndFeel.installProperty(header, "opaque", Boolean.TRUE);
}
/**
* Attaches listeners to the JTableHeader.
*/
protected void installListeners() {
mouseInputListener = createMouseInputListener();
header.addMouseListener(mouseInputListener);
header.addMouseMotionListener(mouseInputListener);
header.addFocusListener(focusListener);
}
/**
* Register all keyboard actions on the JTableHeader.
*/
protected void installKeyboardActions() {
InputMap keyMap = (InputMap)DefaultLookup.get(header, this,
"TableHeader.ancestorInputMap");
SwingUtilities.replaceUIInputMap(header,
JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, keyMap);
LazyActionMap.installLazyActionMap(header, BasicTableHeaderUI.class,
"TableHeader.actionMap");
}
// Uninstall methods
public void uninstallUI(JComponent c) {
uninstallDefaults();
uninstallListeners();
uninstallKeyboardActions();
header.remove(rendererPane);
rendererPane = null;
header = null;
}
protected void uninstallDefaults() {}
protected void uninstallListeners() {
header.removeMouseListener(mouseInputListener);
header.removeMouseMotionListener(mouseInputListener);
mouseInputListener = null;
}
/**
* Unregisters default key actions.
*/
protected void uninstallKeyboardActions() {
SwingUtilities.replaceUIInputMap(header, JComponent.WHEN_FOCUSED, null);
SwingUtilities.replaceUIActionMap(header, null);
}
/**
* Populates TableHeader's actions.
*/
static void loadActionMap(LazyActionMap map) {
map.put(new Actions(Actions.TOGGLE_SORT_ORDER));
map.put(new Actions(Actions.SELECT_COLUMN_TO_LEFT));
map.put(new Actions(Actions.SELECT_COLUMN_TO_RIGHT));
map.put(new Actions(Actions.MOVE_COLUMN_LEFT));
map.put(new Actions(Actions.MOVE_COLUMN_RIGHT));
map.put(new Actions(Actions.RESIZE_LEFT));
map.put(new Actions(Actions.RESIZE_RIGHT));
map.put(new Actions(Actions.FOCUS_TABLE));
}
//
// Support for mouse rollover
//
/**
* Returns the index of the column header over which the mouse
* currently is. When the mouse is not over the table header,
* -1 is returned.
*
* @see #rolloverColumnUpdated(int, int)
* @return the index of the current rollover column
* @since 1.6
*/
protected int getRolloverColumn() {
return rolloverColumn;
}
/**
* This method gets called every time when a rollover column in the table
* header is updated. Every look and feel that supports a rollover effect
* in a table header should override this method and repaint the header.
*
* @param oldColumn the index of the previous rollover column or -1 if the
* mouse was not over a column
* @param newColumn the index of the new rollover column or -1 if the mouse
* is not over a column
* @see #getRolloverColumn()
* @see JTableHeader#getHeaderRect(int)
* @since 1.6
*/
protected void rolloverColumnUpdated(int oldColumn, int newColumn) {
}
private void updateRolloverColumn(MouseEvent e) {
if (header.getDraggedColumn() == null &&
header.contains(e.getPoint())) {
int col = header.columnAtPoint(e.getPoint());
if (col != rolloverColumn) {
int oldRolloverColumn = rolloverColumn;
rolloverColumn = col;
rolloverColumnUpdated(oldRolloverColumn, rolloverColumn);
}
}
}
//
// Support for keyboard and mouse access
//
private int selectNextColumn(boolean doIt) {
int newIndex = getSelectedColumnIndex();
if (newIndex < header.getColumnModel().getColumnCount() - 1) {
newIndex++;
if (doIt) {
selectColumn(newIndex);
}
}
return newIndex;
}
private int selectPreviousColumn(boolean doIt) {
int newIndex = getSelectedColumnIndex();
if (newIndex > 0) {
newIndex--;
if (doIt) {
selectColumn(newIndex);
}
}
return newIndex;
}
/**
* Selects the specified column in the table header. Repaints the
* affected header cells and makes sure the newly selected one is visible.
*/
void selectColumn(int newColIndex) {
selectColumn(newColIndex, true);
}
void selectColumn(int newColIndex, boolean doScroll) {
Rectangle repaintRect = header.getHeaderRect(selectedColumnIndex);
header.repaint(repaintRect);
selectedColumnIndex = newColIndex;
repaintRect = header.getHeaderRect(newColIndex);
header.repaint(repaintRect);
if (doScroll) {
scrollToColumn(newColIndex);
}
return;
}
/**
* Used by selectColumn to scroll horizontally, if necessary,
* to ensure that the newly selected column is visible.
*/
private void scrollToColumn(int col) {
Container container;
JTable table;
//Test whether the header is in a scroll pane and has a table.
if ((header.getParent() == null) ||
((container = header.getParent().getParent()) == null) ||
!(container instanceof JScrollPane) ||
((table = header.getTable()) == null)) {
return;
}
//Now scroll, if necessary.
Rectangle vis = table.getVisibleRect();
Rectangle cellBounds = table.getCellRect(0, col, true);
vis.x = cellBounds.x;
vis.width = cellBounds.width;
table.scrollRectToVisible(vis);
}
private int getSelectedColumnIndex() {
int numCols = header.getColumnModel().getColumnCount();
if (selectedColumnIndex >= numCols && numCols > 0) {
selectedColumnIndex = numCols - 1;
}
return selectedColumnIndex;
}
private static boolean canResize(TableColumn column,
JTableHeader header) {
return (column != null) && header.getResizingAllowed()
&& column.getResizable();
}
private int changeColumnWidth(TableColumn resizingColumn,
JTableHeader th,
int oldWidth, int newWidth) {
resizingColumn.setWidth(newWidth);
Container container;
JTable table;
if ((th.getParent() == null) ||
((container = th.getParent().getParent()) == null) ||
!(container instanceof JScrollPane) ||
((table = th.getTable()) == null)) {
return 0;
}
if (!container.getComponentOrientation().isLeftToRight() &&
!th.getComponentOrientation().isLeftToRight()) {
JViewport viewport = ((JScrollPane)container).getViewport();
int viewportWidth = viewport.getWidth();
int diff = newWidth - oldWidth;
int newHeaderWidth = table.getWidth() + diff;
/* Resize a table */
Dimension tableSize = table.getSize();
tableSize.width += diff;
table.setSize(tableSize);
/* If this table is in AUTO_RESIZE_OFF mode and
* has a horizontal scrollbar, we need to update
* a view's position.
*/
if ((newHeaderWidth >= viewportWidth) &&
(table.getAutoResizeMode() == JTable.AUTO_RESIZE_OFF)) {
Point p = viewport.getViewPosition();
p.x = Math.max(0, Math.min(newHeaderWidth - viewportWidth,
p.x + diff));
viewport.setViewPosition(p);
return diff;
}
}
return 0;
}
//
// Baseline
//
/**
* 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);
int baseline = -1;
TableColumnModel columnModel = header.getColumnModel();
for(int column = 0; column < columnModel.getColumnCount();
column++) {
TableColumn aColumn = columnModel.getColumn(column);
Component comp = getHeaderRenderer(column);
Dimension pref = comp.getPreferredSize();
int columnBaseline = comp.getBaseline(pref.width, height);
if (columnBaseline >= 0) {
if (baseline == -1) {
baseline = columnBaseline;
}
else if (baseline != columnBaseline) {
baseline = -1;
break;
}
}
}
return baseline;
}
//
// Paint Methods and support
//
public void paint(Graphics g, JComponent c) {
if (header.getColumnModel().getColumnCount() <= 0) {
return;
}
boolean ltr = header.getComponentOrientation().isLeftToRight();
Rectangle clip = g.getClipBounds();
Point left = clip.getLocation();
Point right = new Point( clip.x + clip.width - 1, clip.y );
TableColumnModel cm = header.getColumnModel();
int cMin = header.columnAtPoint( ltr ? left : right );
int cMax = header.columnAtPoint( ltr ? right : left );
// 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 = cm.getColumnCount()-1;
}
TableColumn draggedColumn = header.getDraggedColumn();
int columnWidth;
Rectangle cellRect = header.getHeaderRect(ltr ? cMin : cMax);
TableColumn aColumn;
if (ltr) {
for(int column = cMin; column <= cMax ; column++) {
aColumn = cm.getColumn(column);
columnWidth = aColumn.getWidth();
cellRect.width = columnWidth;
if (aColumn != draggedColumn) {
paintCell(g, cellRect, column);
}
cellRect.x += columnWidth;
}
} else {
for(int column = cMax; column >= cMin; column--) {
aColumn = cm.getColumn(column);
columnWidth = aColumn.getWidth();
cellRect.width = columnWidth;
if (aColumn != draggedColumn) {
paintCell(g, cellRect, column);
}
cellRect.x += columnWidth;
}
}
// Paint the dragged column if we are dragging.
if (draggedColumn != null) {
int draggedColumnIndex = viewIndexForColumn(draggedColumn);
Rectangle draggedCellRect = header.getHeaderRect(draggedColumnIndex);
// Draw a gray well in place of the moving column.
g.setColor(header.getParent().getBackground());
g.fillRect(draggedCellRect.x, draggedCellRect.y,
draggedCellRect.width, draggedCellRect.height);
draggedCellRect.x += header.getDraggedDistance();
// Fill the background.
g.setColor(header.getBackground());
g.fillRect(draggedCellRect.x, draggedCellRect.y,
draggedCellRect.width, draggedCellRect.height);
paintCell(g, draggedCellRect, draggedColumnIndex);
}
// Remove all components in the rendererPane.
rendererPane.removeAll();
}
private Component getHeaderRenderer(int columnIndex) {
TableColumn aColumn = header.getColumnModel().getColumn(columnIndex);
TableCellRenderer renderer = aColumn.getHeaderRenderer();
if (renderer == null) {
renderer = header.getDefaultRenderer();
}
boolean hasFocus = !header.isPaintingForPrint()
&& (columnIndex == getSelectedColumnIndex())
&& header.hasFocus();
return renderer.getTableCellRendererComponent(header.getTable(),
aColumn.getHeaderValue(),
false, hasFocus,
-1, columnIndex);
}
private void paintCell(Graphics g, Rectangle cellRect, int columnIndex) {
Component component = getHeaderRenderer(columnIndex);
rendererPane.paintComponent(g, component, header, cellRect.x, cellRect.y,
cellRect.width, cellRect.height, true);
}
private int viewIndexForColumn(TableColumn aColumn) {
TableColumnModel cm = header.getColumnModel();
for (int column = 0; column < cm.getColumnCount(); column++) {
if (cm.getColumn(column) == aColumn) {
return column;
}
}
return -1;
}
//
// Size Methods
//
private int getHeaderHeight() {
int height = 0;
boolean accomodatedDefault = false;
TableColumnModel columnModel = header.getColumnModel();
for(int column = 0; column < columnModel.getColumnCount(); column++) {
TableColumn aColumn = columnModel.getColumn(column);
boolean isDefault = (aColumn.getHeaderRenderer() == null);
if (!isDefault || !accomodatedDefault) {
Component comp = getHeaderRenderer(column);
int rendererHeight = comp.getPreferredSize().height;
height = Math.max(height, rendererHeight);
// Configuring the header renderer to calculate its preferred size
// is expensive. Optimise this by assuming the default renderer
// always has the same height as the first non-zero height that
// it returns for a non-null/non-empty value.
if (isDefault && rendererHeight > 0) {
Object headerValue = aColumn.getHeaderValue();
if (headerValue != null) {
headerValue = headerValue.toString();
if (headerValue != null && !headerValue.equals("")) {
accomodatedDefault = true;
}
}
}
}
}
return height;
}
private Dimension createHeaderSize(long width) {
// None of the callers include the intercell spacing, do it here.
if (width > Integer.MAX_VALUE) {
width = Integer.MAX_VALUE;
}
return new Dimension((int)width, getHeaderHeight());
}
/**
* Return the minimum size of the header. The minimum width is the sum
* of the minimum widths of each column (plus inter-cell spacing).
*/
public Dimension getMinimumSize(JComponent c) {
long width = 0;
Enumeration enumeration = header.getColumnModel().getColumns();
while (enumeration.hasMoreElements()) {
TableColumn aColumn = (TableColumn)enumeration.nextElement();
width = width + aColumn.getMinWidth();
}
return createHeaderSize(width);
}
/**
* Return the preferred size of the header. The preferred height is the
* maximum of the preferred heights of all of the components provided
* by the header renderers. The preferred width is the sum of the
* preferred widths of each column (plus inter-cell spacing).
*/
public Dimension getPreferredSize(JComponent c) {
long width = 0;
Enumeration enumeration = header.getColumnModel().getColumns();
while (enumeration.hasMoreElements()) {
TableColumn aColumn = (TableColumn)enumeration.nextElement();
width = width + aColumn.getPreferredWidth();
}
return createHeaderSize(width);
}
/**
* Return the maximum size of the header. The maximum width is the sum
* of the maximum widths of each column (plus inter-cell spacing).
*/
public Dimension getMaximumSize(JComponent c) {
long width = 0;
Enumeration enumeration = header.getColumnModel().getColumns();
while (enumeration.hasMoreElements()) {
TableColumn aColumn = (TableColumn)enumeration.nextElement();
width = width + aColumn.getMaxWidth();
}
return createHeaderSize(width);
}
private static class Actions extends UIAction {
public static final String TOGGLE_SORT_ORDER =
"toggleSortOrder";
public static final String SELECT_COLUMN_TO_LEFT =
"selectColumnToLeft";
public static final String SELECT_COLUMN_TO_RIGHT =
"selectColumnToRight";
public static final String MOVE_COLUMN_LEFT =
"moveColumnLeft";
public static final String MOVE_COLUMN_RIGHT =
"moveColumnRight";
public static final String RESIZE_LEFT =
"resizeLeft";
public static final String RESIZE_RIGHT =
"resizeRight";
public static final String FOCUS_TABLE =
"focusTable";
public Actions(String name) {
super(name);
}
public boolean isEnabled(Object sender) {
if (sender instanceof JTableHeader) {
JTableHeader th = (JTableHeader)sender;
TableColumnModel cm = th.getColumnModel();
if (cm.getColumnCount() <= 0) {
return false;
}
String key = getName();
BasicTableHeaderUI ui =
(BasicTableHeaderUI)BasicLookAndFeel.getUIOfType(th.getUI(),
BasicTableHeaderUI.class);
if (ui != null) {
if (key == MOVE_COLUMN_LEFT) {
return th.getReorderingAllowed()
&& maybeMoveColumn(true, th, ui, false);
} else if (key == MOVE_COLUMN_RIGHT) {
return th.getReorderingAllowed()
&& maybeMoveColumn(false, th, ui, false);
} else if (key == RESIZE_LEFT ||
key == RESIZE_RIGHT) {
return canResize(cm.getColumn(ui.getSelectedColumnIndex()), th);
} else if (key == FOCUS_TABLE) {
return (th.getTable() != null);
}
}
}
return true;
}
public void actionPerformed(ActionEvent e) {
JTableHeader th = (JTableHeader)e.getSource();
BasicTableHeaderUI ui =
(BasicTableHeaderUI)BasicLookAndFeel.
getUIOfType(th.getUI(),
BasicTableHeaderUI.class);
if (ui == null) {
return;
}
String name = getName();
if (TOGGLE_SORT_ORDER == name) {
JTable table = th.getTable();
RowSorter sorter = table == null ? null : table.getRowSorter();
if (sorter != null) {
int columnIndex = ui.getSelectedColumnIndex();
columnIndex = table.convertColumnIndexToModel(
columnIndex);
sorter.toggleSortOrder(columnIndex);
}
} else if (SELECT_COLUMN_TO_LEFT == name) {
if (th.getComponentOrientation().isLeftToRight()) {
ui.selectPreviousColumn(true);
} else {
ui.selectNextColumn(true);
}
} else if (SELECT_COLUMN_TO_RIGHT == name) {
if (th.getComponentOrientation().isLeftToRight()) {
ui.selectNextColumn(true);
} else {
ui.selectPreviousColumn(true);
}
} else if (MOVE_COLUMN_LEFT == name) {
moveColumn(true, th, ui);
} else if (MOVE_COLUMN_RIGHT == name) {
moveColumn(false, th, ui);
} else if (RESIZE_LEFT == name) {
resize(true, th, ui);
} else if (RESIZE_RIGHT == name) {
resize(false, th, ui);
} else if (FOCUS_TABLE == name) {
JTable table = th.getTable();
if (table != null) {
table.requestFocusInWindow();
}
}
}
private void moveColumn(boolean leftArrow, JTableHeader th,
BasicTableHeaderUI ui) {
maybeMoveColumn(leftArrow, th, ui, true);
}
private boolean maybeMoveColumn(boolean leftArrow, JTableHeader th,
BasicTableHeaderUI ui, boolean doIt) {
int oldIndex = ui.getSelectedColumnIndex();
int newIndex;
if (th.getComponentOrientation().isLeftToRight()) {
newIndex = leftArrow ? ui.selectPreviousColumn(doIt)
: ui.selectNextColumn(doIt);
} else {
newIndex = leftArrow ? ui.selectNextColumn(doIt)
: ui.selectPreviousColumn(doIt);
}
if (newIndex != oldIndex) {
if (doIt) {
th.getColumnModel().moveColumn(oldIndex, newIndex);
} else {
return true; // we'd do the move if asked
}
}
return false;
}
private void resize(boolean leftArrow, JTableHeader th,
BasicTableHeaderUI ui) {
int columnIndex = ui.getSelectedColumnIndex();
TableColumn resizingColumn =
th.getColumnModel().getColumn(columnIndex);
th.setResizingColumn(resizingColumn);
int oldWidth = resizingColumn.getWidth();
int newWidth = oldWidth;
if (th.getComponentOrientation().isLeftToRight()) {
newWidth = newWidth + (leftArrow ? -1 : 1);
} else {
newWidth = newWidth + (leftArrow ? 1 : -1);
}
ui.changeColumnWidth(resizingColumn, th, oldWidth, newWidth);
}
}
} // End of Class BasicTableHeaderUI
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