JDK14/Java14源码在线阅读
/*
* Copyright (c) 1997, 2016, 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.table;
import sun.swing.table.DefaultTableCellHeaderRenderer;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.plaf.*;
import javax.accessibility.*;
import java.beans.BeanProperty;
import java.beans.PropertyChangeListener;
import java.beans.Transient;
import java.io.ObjectOutputStream;
import java.io.IOException;
import sun.awt.AWTAccessor;
import sun.awt.AWTAccessor.MouseEventAccessor;
/**
* This is the object which manages the header of the <code>JTable</code>.
* <p>
* <strong>Warning:</strong>
* Serialized objects of this class will not be compatible with
* future Swing releases. The current serialization support is
* appropriate for short term storage or RMI between applications running
* the same version of Swing. As of 1.4, support for long term storage
* of all JavaBeans™
* has been added to the <code>java.beans</code> package.
* Please see {@link java.beans.XMLEncoder}.
*
* @author Alan Chung
* @author Philip Milne
* @see javax.swing.JTable
*/
@SuppressWarnings("serial") // Same-version serialization only
public class JTableHeader extends JComponent implements TableColumnModelListener, Accessible
{
/**
* @see #getUIClassID
* @see #readObject
*/
private static final String uiClassID = "TableHeaderUI";
//
// Instance Variables
//
/**
* The table for which this object is the header;
* the default is <code>null</code>.
*/
protected JTable table;
/**
* The <code>TableColumnModel</code> of the table header.
*/
protected TableColumnModel columnModel;
/**
* If true, reordering of columns are allowed by the user;
* the default is true.
*/
protected boolean reorderingAllowed;
/**
* If true, resizing of columns are allowed by the user;
* the default is true.
*/
protected boolean resizingAllowed;
/**
* Obsolete as of Java 2 platform v1.3. Real time repaints, in response
* to column dragging or resizing, are now unconditional.
*/
/*
* If this flag is true, then the header will repaint the table as
* a column is dragged or resized; the default is true.
*/
protected boolean updateTableInRealTime;
/** The index of the column being resized. <code>null</code> if not resizing. */
protected transient TableColumn resizingColumn;
/** The index of the column being dragged. <code>null</code> if not dragging. */
protected transient TableColumn draggedColumn;
/** The distance from its original position the column has been dragged. */
protected transient int draggedDistance;
/**
* The default renderer to be used when a <code>TableColumn</code>
* does not define a <code>headerRenderer</code>.
*/
private TableCellRenderer defaultRenderer;
/**
* Flag to indicate UI update is in progress
*/
private transient boolean updateInProgress;
//
// Constructors
//
/**
* Constructs a <code>JTableHeader</code> with a default
* <code>TableColumnModel</code>.
*
* @see #createDefaultColumnModel
*/
public JTableHeader() {
this(null);
}
/**
* Constructs a <code>JTableHeader</code> which is initialized with
* <code>cm</code> as the column model. If <code>cm</code> is
* <code>null</code> this method will initialize the table header
* with a default <code>TableColumnModel</code>.
*
* @param cm the column model for the table
* @see #createDefaultColumnModel
*/
public JTableHeader(TableColumnModel cm) {
super();
//setFocusable(false); // for strict win/mac compatibility mode,
// this method should be invoked
if (cm == null)
cm = createDefaultColumnModel();
setColumnModel(cm);
// Initialize local ivars
initializeLocalVars();
// Get UI going
updateUI();
}
//
// Local behavior attributes
//
/**
* Sets the table associated with this header.
* @param table the new table
*/
@BeanProperty(description
= "The table associated with this header.")
public void setTable(JTable table) {
JTable old = this.table;
this.table = table;
firePropertyChange("table", old, table);
}
/**
* Returns the table associated with this header.
* @return the <code>table</code> property
*/
public JTable getTable() {
return table;
}
/**
* Sets whether the user can drag column headers to reorder columns.
*
* @param reorderingAllowed true if the table view should allow
* reordering; otherwise false
* @see #getReorderingAllowed
*/
@BeanProperty(description
= "Whether the user can drag column headers to reorder columns.")
public void setReorderingAllowed(boolean reorderingAllowed) {
boolean old = this.reorderingAllowed;
this.reorderingAllowed = reorderingAllowed;
firePropertyChange("reorderingAllowed", old, reorderingAllowed);
}
/**
* Returns true if the user is allowed to rearrange columns by
* dragging their headers, false otherwise. The default is true. You can
* rearrange columns programmatically regardless of this setting.
*
* @return the <code>reorderingAllowed</code> property
* @see #setReorderingAllowed
*/
public boolean getReorderingAllowed() {
return reorderingAllowed;
}
/**
* Sets whether the user can resize columns by dragging between headers.
*
* @param resizingAllowed true if table view should allow
* resizing
* @see #getResizingAllowed
*/
@BeanProperty(description
= "Whether the user can resize columns by dragging between headers.")
public void setResizingAllowed(boolean resizingAllowed) {
boolean old = this.resizingAllowed;
this.resizingAllowed = resizingAllowed;
firePropertyChange("resizingAllowed", old, resizingAllowed);
}
/**
* Returns true if the user is allowed to resize columns by dragging
* between their headers, false otherwise. The default is true. You can
* resize columns programmatically regardless of this setting.
*
* @return the <code>resizingAllowed</code> property
* @see #setResizingAllowed
*/
public boolean getResizingAllowed() {
return resizingAllowed;
}
/**
* Returns the dragged column, if and only if, a drag is in
* process, otherwise returns <code>null</code>.
*
* @return the dragged column, if a drag is in
* process, otherwise returns <code>null</code>
* @see #getDraggedDistance
*/
public TableColumn getDraggedColumn() {
return draggedColumn;
}
/**
* Returns the column's horizontal distance from its original
* position, if and only if, a drag is in process. Otherwise, the
* the return value is meaningless.
*
* @return the column's horizontal distance from its original
* position, if a drag is in process, otherwise the return
* value is meaningless
* @see #getDraggedColumn
*/
public int getDraggedDistance() {
return draggedDistance;
}
/**
* Returns the resizing column. If no column is being
* resized this method returns <code>null</code>.
*
* @return the resizing column, if a resize is in process, otherwise
* returns <code>null</code>
*/
public TableColumn getResizingColumn() {
return resizingColumn;
}
/**
* Obsolete as of Java 2 platform v1.3. Real time repaints, in response to
* column dragging or resizing, are now unconditional.
* @param flag true if tableView should update the body of the
* table in real time
*/
public void setUpdateTableInRealTime(boolean flag) {
updateTableInRealTime = flag;
}
/**
* Obsolete as of Java 2 platform v1.3. Real time repaints, in response to
* column dragging or resizing, are now unconditional.
* @return true if the table updates in real time
*/
public boolean getUpdateTableInRealTime() {
return updateTableInRealTime;
}
/**
* Sets the default renderer to be used when no <code>headerRenderer</code>
* is defined by a <code>TableColumn</code>.
* @param defaultRenderer the default renderer
* @since 1.3
*/
public void setDefaultRenderer(TableCellRenderer defaultRenderer) {
this.defaultRenderer = defaultRenderer;
}
/**
* Returns the default renderer used when no <code>headerRenderer</code>
* is defined by a <code>TableColumn</code>.
* @return the default renderer
* @since 1.3
*/
@Transient
public TableCellRenderer getDefaultRenderer() {
return defaultRenderer;
}
/**
* Returns the index of the column that <code>point</code> lies in, or -1 if it
* lies out of bounds.
*
* @param point if this <code>point</code> lies within a column, the index of
* that column will be returned; otherwise it is out of bounds
* and -1 is returned
*
* @return the index of the column that <code>point</code> lies in, or -1 if it
* lies out of bounds
*/
public int columnAtPoint(Point point) {
int x = point.x;
if (!getComponentOrientation().isLeftToRight()) {
x = getWidthInRightToLeft() - x - 1;
}
return getColumnModel().getColumnIndexAtX(x);
}
/**
* Returns the rectangle containing the header tile at <code>column</code>.
* When the <code>column</code> parameter is out of bounds this method uses the
* same conventions as the <code>JTable</code> method <code>getCellRect</code>.
*
* @param column index of the column
*
* @return the rectangle containing the header tile at <code>column</code>
* @see JTable#getCellRect
*/
public Rectangle getHeaderRect(int column) {
Rectangle r = new Rectangle();
TableColumnModel cm = getColumnModel();
r.height = getHeight();
if (column < 0) {
// x = width = 0;
if( !getComponentOrientation().isLeftToRight() ) {
r.x = getWidthInRightToLeft();
}
}
else if (column >= cm.getColumnCount()) {
if( getComponentOrientation().isLeftToRight() ) {
r.x = getWidth();
}
}
else {
for(int i = 0; i < column; i++) {
r.x += cm.getColumn(i).getWidth();
}
if( !getComponentOrientation().isLeftToRight() ) {
r.x = getWidthInRightToLeft() - r.x - cm.getColumn(column).getWidth();
}
r.width = cm.getColumn(column).getWidth();
}
return r;
}
/**
* Allows the renderer's tips to be used if there is text set.
* @param event the location of the event identifies the proper
* renderer and, therefore, the proper tip
* @return the tool tip for this component
*/
@SuppressWarnings("deprecation")
public String getToolTipText(MouseEvent event) {
String tip = null;
Point p = event.getPoint();
int column;
// Locate the renderer under the event location
if ((column = columnAtPoint(p)) != -1) {
TableColumn aColumn = columnModel.getColumn(column);
TableCellRenderer renderer = aColumn.getHeaderRenderer();
if (renderer == null) {
renderer = defaultRenderer;
}
Component component = renderer.getTableCellRendererComponent(
getTable(), aColumn.getHeaderValue(), false, false,
-1, column);
// Now have to see if the component is a JComponent before
// getting the tip
if (component instanceof JComponent) {
// Convert the event to the renderer's coordinate system
MouseEvent newEvent;
Rectangle cellRect = getHeaderRect(column);
p.translate(-cellRect.x, -cellRect.y);
newEvent = new MouseEvent(component, event.getID(),
event.getWhen(), event.getModifiers(),
p.x, p.y, event.getXOnScreen(), event.getYOnScreen(),
event.getClickCount(),
event.isPopupTrigger(), MouseEvent.NOBUTTON);
MouseEventAccessor meAccessor = AWTAccessor.getMouseEventAccessor();
meAccessor.setCausedByTouchEvent(newEvent,
meAccessor.isCausedByTouchEvent(event));
tip = ((JComponent)component).getToolTipText(newEvent);
}
}
// No tip from the renderer get our own tip
if (tip == null)
tip = getToolTipText();
return tip;
}
/**
* Returns the preferred size of the table header.
* This is the size required to display the header and requested for
* the viewport.
* The returned {@code Dimension} {@code width} will always be calculated by
* the underlying TableHeaderUI, regardless of any width specified by
* {@link JComponent#setPreferredSize(java.awt.Dimension)}
*
* @return the size
*/
@Override
public Dimension getPreferredSize() {
Dimension preferredSize = super.getPreferredSize();
if (isPreferredSizeSet() && ui != null) {
Dimension size = ui.getPreferredSize(this);
if (size != null) preferredSize.width = size.width;
}
return preferredSize;
}
//
// Managing TableHeaderUI
//
/**
* Returns the look and feel (L&F) object that renders this component.
*
* @return the <code>TableHeaderUI</code> object that renders this component
*/
public TableHeaderUI getUI() {
return (TableHeaderUI)ui;
}
/**
* Sets the look and feel (L&F) object that renders this component.
*
* @param ui the <code>TableHeaderUI</code> L&F object
* @see UIDefaults#getUI
*/
public void setUI(TableHeaderUI ui){
if (this.ui != ui) {
super.setUI(ui);
repaint();
}
}
/**
* Notification from the <code>UIManager</code> that the look and feel
* (L&F) has changed.
* Replaces the current UI object with the latest version from the
* <code>UIManager</code>.
*
* @see JComponent#updateUI
*/
public void updateUI(){
if (!updateInProgress) {
updateInProgress = true;
try {
setUI((TableHeaderUI)UIManager.getUI(this));
TableCellRenderer renderer = getDefaultRenderer();
if (renderer instanceof Component) {
SwingUtilities.updateComponentTreeUI((Component)renderer);
}
} finally {
updateInProgress = false;
}
}
}
/**
* Returns the suffix used to construct the name of the look and feel
* (L&F) class used to render this component.
*
* @return the string "TableHeaderUI"
* @see JComponent#getUIClassID
* @see UIDefaults#getUI
*/
public String getUIClassID() {
return uiClassID;
}
//
// Managing models
//
/**
* Sets the column model for this table to <code>newModel</code> and registers
* for listener notifications from the new column model.
*
* @param columnModel the new data source for this table
* @exception IllegalArgumentException
* if <code>newModel</code> is <code>null</code>
* @see #getColumnModel
*/
@BeanProperty(description
= "The object governing the way columns appear in the view.")
public void setColumnModel(TableColumnModel columnModel) {
if (columnModel == null) {
throw new IllegalArgumentException("Cannot set a null ColumnModel");
}
TableColumnModel old = this.columnModel;
if (columnModel != old) {
if (old != null) {
old.removeColumnModelListener(this);
}
this.columnModel = columnModel;
columnModel.addColumnModelListener(this);
firePropertyChange("columnModel", old, columnModel);
resizeAndRepaint();
}
}
/**
* Returns the <code>TableColumnModel</code> that contains all column information
* of this table header.
*
* @return the <code>columnModel</code> property
* @see #setColumnModel
*/
public TableColumnModel getColumnModel() {
return columnModel;
}
//
// Implementing TableColumnModelListener interface
//
/**
* Invoked when a column is added to the table column model.
* <p>
* Application code will not use these methods explicitly, they
* are used internally by <code>JTable</code>.
*
* @param e the event received
* @see TableColumnModelListener
*/
public void columnAdded(TableColumnModelEvent e) { resizeAndRepaint(); }
/**
* Invoked when a column is removed from the table column model.
* <p>
* Application code will not use these methods explicitly, they
* are used internally by <code>JTable</code>.
*
* @param e the event received
* @see TableColumnModelListener
*/
public void columnRemoved(TableColumnModelEvent e) { resizeAndRepaint(); }
/**
* Invoked when a column is repositioned.
* <p>
* Application code will not use these methods explicitly, they
* are used internally by <code>JTable</code>.
*
* @param e the event received
* @see TableColumnModelListener
*/
public void columnMoved(TableColumnModelEvent e) { repaint(); }
/**
* Invoked when a column is moved due to a margin change.
* <p>
* Application code will not use these methods explicitly, they
* are used internally by <code>JTable</code>.
*
* @param e the event received
* @see TableColumnModelListener
*/
public void columnMarginChanged(ChangeEvent e) { resizeAndRepaint(); }
// --Redrawing the header is slow in cell selection mode.
// --Since header selection is ugly and it is always clear from the
// --view which columns are selected, don't redraw the header.
/**
* Invoked when the selection model of the <code>TableColumnModel</code>
* is changed. This method currently has no effect (the header is not
* redrawn).
* <p>
* Application code will not use these methods explicitly, they
* are used internally by <code>JTable</code>.
*
* @param e the event received
* @see TableColumnModelListener
*/
public void columnSelectionChanged(ListSelectionEvent e) { } // repaint(); }
//
// Package Methods
//
/**
* Returns the default column model object which is
* a <code>DefaultTableColumnModel</code>. A subclass can override this
* method to return a different column model object
*
* @return the default column model object
*/
protected TableColumnModel createDefaultColumnModel() {
return new DefaultTableColumnModel();
}
/**
* Returns a default renderer to be used when no header renderer
* is defined by a <code>TableColumn</code>.
*
* @return the default table column renderer
* @since 1.3
*/
protected TableCellRenderer createDefaultRenderer() {
return new DefaultTableCellHeaderRenderer();
}
/**
* Initializes the local variables and properties with default values.
* Used by the constructor methods.
*/
protected void initializeLocalVars() {
setOpaque(true);
table = null;
reorderingAllowed = true;
resizingAllowed = true;
draggedColumn = null;
draggedDistance = 0;
resizingColumn = null;
updateTableInRealTime = true;
// I'm registered to do tool tips so we can draw tips for the
// renderers
ToolTipManager toolTipManager = ToolTipManager.sharedInstance();
toolTipManager.registerComponent(this);
setDefaultRenderer(createDefaultRenderer());
}
/**
* Sizes the header and marks it as needing display. Equivalent
* to <code>revalidate</code> followed by <code>repaint</code>.
*/
public void resizeAndRepaint() {
revalidate();
repaint();
}
/**
* Sets the header's <code>draggedColumn</code> to <code>aColumn</code>.
* <p>
* Application code will not use this method explicitly, it is used
* internally by the column dragging mechanism.
*
* @param aColumn the column being dragged, or <code>null</code> if
* no column is being dragged
*/
public void setDraggedColumn(TableColumn aColumn) {
draggedColumn = aColumn;
}
/**
* Sets the header's <code>draggedDistance</code> to <code>distance</code>.
* @param distance the distance dragged
*/
public void setDraggedDistance(int distance) {
draggedDistance = distance;
}
/**
* Sets the header's <code>resizingColumn</code> to <code>aColumn</code>.
* <p>
* Application code will not use this method explicitly, it
* is used internally by the column sizing mechanism.
*
* @param aColumn the column being resized, or <code>null</code> if
* no column is being resized
*/
public void setResizingColumn(TableColumn aColumn) {
resizingColumn = aColumn;
}
/**
* See <code>readObject</code> and <code>writeObject</code> in
* <code>JComponent</code> for more
* information about serialization in Swing.
*/
private void writeObject(ObjectOutputStream s) throws IOException {
s.defaultWriteObject();
if ((ui != null) && (getUIClassID().equals(uiClassID))) {
ui.installUI(this);
}
}
private int getWidthInRightToLeft() {
if ((table != null) &&
(table.getAutoResizeMode() != JTable.AUTO_RESIZE_OFF)) {
return table.getWidth();
}
return super.getWidth();
}
/**
* Returns a string representation of this <code>JTableHeader</code>. This method
* is intended to be used only for debugging purposes, and the
* content and format of the returned string may vary between
* implementations. The returned string may be empty but may not
* be <code>null</code>.
* <P>
* Overriding <code>paramString</code> to provide information about the
* specific new aspects of the JFC components.
*
* @return a string representation of this <code>JTableHeader</code>
*/
protected String paramString() {
String reorderingAllowedString = (reorderingAllowed ?
"true" : "false");
String resizingAllowedString = (resizingAllowed ?
"true" : "false");
String updateTableInRealTimeString = (updateTableInRealTime ?
"true" : "false");
return super.paramString() +
",draggedDistance=" + draggedDistance +
",reorderingAllowed=" + reorderingAllowedString +
",resizingAllowed=" + resizingAllowedString +
",updateTableInRealTime=" + updateTableInRealTimeString;
}
/////////////////
// Accessibility support
////////////////
/**
* Gets the AccessibleContext associated with this JTableHeader.
* For JTableHeaders, the AccessibleContext takes the form of an
* AccessibleJTableHeader.
* A new AccessibleJTableHeader instance is created if necessary.
*
* @return an AccessibleJTableHeader that serves as the
* AccessibleContext of this JTableHeader
*/
public AccessibleContext getAccessibleContext() {
if (accessibleContext == null) {
accessibleContext = new AccessibleJTableHeader();
}
return accessibleContext;
}
//
// *** should also implement AccessibleSelection?
// *** and what's up with keyboard navigation/manipulation?
//
/**
* This class implements accessibility support for the
* <code>JTableHeader</code> class. It provides an implementation of the
* Java Accessibility API appropriate to table header user-interface
* elements.
* <p>
* <strong>Warning:</strong>
* Serialized objects of this class will not be compatible with
* future Swing releases. The current serialization support is
* appropriate for short term storage or RMI between applications running
* the same version of Swing. As of 1.4, support for long term storage
* of all JavaBeans™
* has been added to the <code>java.beans</code> package.
* Please see {@link java.beans.XMLEncoder}.
*/
@SuppressWarnings("serial") // Same-version serialization only
protected class AccessibleJTableHeader extends AccessibleJComponent {
/**
* Get the role of this object.
*
* @return an instance of AccessibleRole describing the role of the
* object
* @see AccessibleRole
*/
public AccessibleRole getAccessibleRole() {
return AccessibleRole.PANEL;
}
/**
* Returns the Accessible child, if one exists, contained at the local
* coordinate Point.
*
* @param p The point defining the top-left corner of the Accessible,
* given in the coordinate space of the object's parent.
* @return the Accessible, if it exists, at the specified location;
* else null
*/
public Accessible getAccessibleAt(Point p) {
int column;
// Locate the renderer under the Point
if ((column = JTableHeader.this.columnAtPoint(p)) != -1) {
TableColumn aColumn = JTableHeader.this.columnModel.getColumn(column);
TableCellRenderer renderer = aColumn.getHeaderRenderer();
if (renderer == null) {
if (defaultRenderer != null) {
renderer = defaultRenderer;
} else {
return null;
}
}
Component component = renderer.getTableCellRendererComponent(
JTableHeader.this.getTable(),
aColumn.getHeaderValue(), false, false,
-1, column);
return new AccessibleJTableHeaderEntry(column, JTableHeader.this, JTableHeader.this.table);
} else {
return null;
}
}
/**
* Returns the number of accessible children in the object. If all
* of the children of this object implement Accessible, than this
* method should return the number of children of this object.
*
* @return the number of accessible children in the object.
*/
public int getAccessibleChildrenCount() {
return JTableHeader.this.columnModel.getColumnCount();
}
/**
* Return the nth Accessible child of the object.
*
* @param i zero-based index of child
* @return the nth Accessible child of the object
*/
public Accessible getAccessibleChild(int i) {
if (i < 0 || i >= getAccessibleChildrenCount()) {
return null;
} else {
TableColumn aColumn = JTableHeader.this.columnModel.getColumn(i)
;
TableCellRenderer renderer = aColumn.getHeaderRenderer();
if (renderer == null) {
if (defaultRenderer != null) {
renderer = defaultRenderer;
} else {
return null;
}
}
Component component = renderer.getTableCellRendererComponent(
JTableHeader.this.getTable(),
aColumn.getHeaderValue(), false, false,
-1, i);
return new AccessibleJTableHeaderEntry(i, JTableHeader.this, JTableHeader.this.table);
}
}
/**
* This class provides an implementation of the Java Accessibility
* API appropriate for JTableHeader entries.
*/
protected class AccessibleJTableHeaderEntry extends AccessibleContext
implements Accessible, AccessibleComponent {
private JTableHeader parent;
private int column;
private JTable table;
/**
* Constructs an AccessiblJTableHeaaderEntry
* @since 1.4
*
* @param c the column index
* @param p the parent <code>JTableHeader</code>
* @param t the table <code>JTable</code>
*/
public AccessibleJTableHeaderEntry(int c, JTableHeader p, JTable t) {
parent = p;
column = c;
table = t;
this.setAccessibleParent(parent);
}
/**
* Get the AccessibleContext associated with this object.
* In the implementation of the Java Accessibility API
* for this class, returns this object, which serves as
* its own AccessibleContext.
*
* @return this object
*/
public AccessibleContext getAccessibleContext() {
return this;
}
private AccessibleContext getCurrentAccessibleContext() {
TableColumnModel tcm = table.getColumnModel();
if (tcm != null) {
// Fixes 4772355 - ArrayOutOfBoundsException in
// JTableHeader
if (column < 0 || column >= tcm.getColumnCount()) {
return null;
}
TableColumn aColumn = tcm.getColumn(column);
TableCellRenderer renderer = aColumn.getHeaderRenderer();
if (renderer == null) {
if (defaultRenderer != null) {
renderer = defaultRenderer;
} else {
return null;
}
}
Component c = renderer.getTableCellRendererComponent(
JTableHeader.this.getTable(),
aColumn.getHeaderValue(), false, false,
-1, column);
if (c instanceof Accessible) {
return ((Accessible) c).getAccessibleContext();
}
}
return null;
}
private Component getCurrentComponent() {
TableColumnModel tcm = table.getColumnModel();
if (tcm != null) {
// Fixes 4772355 - ArrayOutOfBoundsException in
// JTableHeader
if (column < 0 || column >= tcm.getColumnCount()) {
return null;
}
TableColumn aColumn = tcm.getColumn(column);
TableCellRenderer renderer = aColumn.getHeaderRenderer();
if (renderer == null) {
if (defaultRenderer != null) {
renderer = defaultRenderer;
} else {
return null;
}
}
return renderer.getTableCellRendererComponent(
JTableHeader.this.getTable(),
aColumn.getHeaderValue(), false, false,
-1, column);
} else {
return null;
}
}
// AccessibleContext methods
public String getAccessibleName() {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac != null) {
String name = ac.getAccessibleName();
if ((name != null) && (name != "")) {
// return the cell renderer's AccessibleName
return name;
}
}
if ((accessibleName != null) && (accessibleName != "")) {
return accessibleName;
} else {
// fall back to the client property
String name = (String)getClientProperty(AccessibleContext.ACCESSIBLE_NAME_PROPERTY);
if (name != null) {
return name;
} else {
return table.getColumnName(column);
}
}
}
public void setAccessibleName(String s) {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac != null) {
ac.setAccessibleName(s);
} else {
super.setAccessibleName(s);
}
}
//
// *** should check toolTip text for desc. (needs MouseEvent)
//
public String getAccessibleDescription() {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac != null) {
return ac.getAccessibleDescription();
} else {
return super.getAccessibleDescription();
}
}
public void setAccessibleDescription(String s) {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac != null) {
ac.setAccessibleDescription(s);
} else {
super.setAccessibleDescription(s);
}
}
public AccessibleRole getAccessibleRole() {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac != null) {
return ac.getAccessibleRole();
} else {
return AccessibleRole.COLUMN_HEADER;
}
}
public AccessibleStateSet getAccessibleStateSet() {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac != null) {
AccessibleStateSet states = ac.getAccessibleStateSet();
if (isShowing()) {
states.add(AccessibleState.SHOWING);
}
return states;
} else {
return new AccessibleStateSet(); // must be non null?
}
}
public int getAccessibleIndexInParent() {
return column;
}
public int getAccessibleChildrenCount() {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac != null) {
return ac.getAccessibleChildrenCount();
} else {
return 0;
}
}
public Accessible getAccessibleChild(int i) {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac != null) {
Accessible accessibleChild = ac.getAccessibleChild(i);
ac.setAccessibleParent(this);
return accessibleChild;
} else {
return null;
}
}
public Locale getLocale() {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac != null) {
return ac.getLocale();
} else {
return null;
}
}
public void addPropertyChangeListener(PropertyChangeListener l) {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac != null) {
ac.addPropertyChangeListener(l);
} else {
super.addPropertyChangeListener(l);
}
}
public void removePropertyChangeListener(PropertyChangeListener l) {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac != null) {
ac.removePropertyChangeListener(l);
} else {
super.removePropertyChangeListener(l);
}
}
public AccessibleAction getAccessibleAction() {
return getCurrentAccessibleContext().getAccessibleAction();
}
/**
* Get the AccessibleComponent associated with this object. In the
* implementation of the Java Accessibility API for this class,
* return this object, which is responsible for implementing the
* AccessibleComponent interface on behalf of itself.
*
* @return this object
*/
public AccessibleComponent getAccessibleComponent() {
return this; // to override getBounds()
}
public AccessibleSelection getAccessibleSelection() {
return getCurrentAccessibleContext().getAccessibleSelection();
}
public AccessibleText getAccessibleText() {
return getCurrentAccessibleContext().getAccessibleText();
}
public AccessibleValue getAccessibleValue() {
return getCurrentAccessibleContext().getAccessibleValue();
}
// AccessibleComponent methods
public Color getBackground() {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac instanceof AccessibleComponent) {
return ((AccessibleComponent) ac).getBackground();
} else {
Component c = getCurrentComponent();
if (c != null) {
return c.getBackground();
} else {
return null;
}
}
}
public void setBackground(Color c) {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac instanceof AccessibleComponent) {
((AccessibleComponent) ac).setBackground(c);
} else {
Component cp = getCurrentComponent();
if (cp != null) {
cp.setBackground(c);
}
}
}
public Color getForeground() {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac instanceof AccessibleComponent) {
return ((AccessibleComponent) ac).getForeground();
} else {
Component c = getCurrentComponent();
if (c != null) {
return c.getForeground();
} else {
return null;
}
}
}
public void setForeground(Color c) {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac instanceof AccessibleComponent) {
((AccessibleComponent) ac).setForeground(c);
} else {
Component cp = getCurrentComponent();
if (cp != null) {
cp.setForeground(c);
}
}
}
public Cursor getCursor() {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac instanceof AccessibleComponent) {
return ((AccessibleComponent) ac).getCursor();
} else {
Component c = getCurrentComponent();
if (c != null) {
return c.getCursor();
} else {
Accessible ap = getAccessibleParent();
if (ap instanceof AccessibleComponent) {
return ((AccessibleComponent) ap).getCursor();
} else {
return null;
}
}
}
}
public void setCursor(Cursor c) {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac instanceof AccessibleComponent) {
((AccessibleComponent) ac).setCursor(c);
} else {
Component cp = getCurrentComponent();
if (cp != null) {
cp.setCursor(c);
}
}
}
public Font getFont() {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac instanceof AccessibleComponent) {
return ((AccessibleComponent) ac).getFont();
} else {
Component c = getCurrentComponent();
if (c != null) {
return c.getFont();
} else {
return null;
}
}
}
public void setFont(Font f) {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac instanceof AccessibleComponent) {
((AccessibleComponent) ac).setFont(f);
} else {
Component c = getCurrentComponent();
if (c != null) {
c.setFont(f);
}
}
}
public FontMetrics getFontMetrics(Font f) {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac instanceof AccessibleComponent) {
return ((AccessibleComponent) ac).getFontMetrics(f);
} else {
Component c = getCurrentComponent();
if (c != null) {
return c.getFontMetrics(f);
} else {
return null;
}
}
}
public boolean isEnabled() {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac instanceof AccessibleComponent) {
return ((AccessibleComponent) ac).isEnabled();
} else {
Component c = getCurrentComponent();
if (c != null) {
return c.isEnabled();
} else {
return false;
}
}
}
public void setEnabled(boolean b) {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac instanceof AccessibleComponent) {
((AccessibleComponent) ac).setEnabled(b);
} else {
Component c = getCurrentComponent();
if (c != null) {
c.setEnabled(b);
}
}
}
public boolean isVisible() {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac instanceof AccessibleComponent) {
return ((AccessibleComponent) ac).isVisible();
} else {
Component c = getCurrentComponent();
if (c != null) {
return c.isVisible();
} else {
return false;
}
}
}
public void setVisible(boolean b) {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac instanceof AccessibleComponent) {
((AccessibleComponent) ac).setVisible(b);
} else {
Component c = getCurrentComponent();
if (c != null) {
c.setVisible(b);
}
}
}
public boolean isShowing() {
if (isVisible() && JTableHeader.this.isShowing()) {
return true;
} else {
return false;
}
}
public boolean contains(Point p) {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac instanceof AccessibleComponent) {
Rectangle r = ((AccessibleComponent) ac).getBounds();
return r.contains(p);
} else {
Component c = getCurrentComponent();
if (c != null) {
Rectangle r = c.getBounds();
return r.contains(p);
} else {
return getBounds().contains(p);
}
}
}
public Point getLocationOnScreen() {
if (parent != null) {
Point parentLocation = parent.getLocationOnScreen();
Point componentLocation = getLocation();
componentLocation.translate(parentLocation.x, parentLocation.y);
return componentLocation;
} else {
return null;
}
}
public Point getLocation() {
AccessibleContext ac = getCurrentAccessibleContext();
if (ac instanceof AccessibleComponent) {
Rectangle r = ((AccessibleComponent) ac).getBounds();
return r.getLocation();
} else {
/**代码未完, 请加载全部代码(NowJava.com).**/
关注时代Java
关注时代Java