javax.swing.table
Class JTableHeader

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Container
              |
              +--javax.swing.JComponent
                    |
                    +--javax.swing.table.JTableHeader

public class JTableHeader

extends JComponent

implements TableColumnModelListener, Accessible

This is the column header part of a JTable. I allow the user to change column widths and column ordering. I share the same TableColumnModel with a JTable.

Warning: 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. A future release of Swing will provide support for long term persistence.

See Also:

JTable, Serialized Form

Inner Class Summary

protected class

JTableHeader.AccessibleJTableHeader The class used to obtain the accessible role for this object.

Inner classes inherited from class javax.swing.JComponent

JComponent.AccessibleJComponent

Field Summary

protected TableColumnModel	columnModel The TableColumnModel of the table header
protected TableColumn	draggedColumn The index of the column being dragged.
protected int	draggedDistance The distance from its original position the column has been dragged
protected boolean	reorderingAllowed Reordering of columns are allowed by the user
protected boolean	resizingAllowed Resizing of columns are allowed by the user
protected TableColumn	resizingColumn The index of the column being resized.
protected JTable	table
protected boolean	updateTableInRealTime If this flag is true, then the header will repaint the table as a column is dragged or resized.

Fields inherited from class javax.swing.JComponent

accessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Constructor Summary

JTableHeader()
Constructs a JTableHeader with a default TableColumnModel

JTableHeader(TableColumnModel cm)
Constructs a JTableHeader which is initialized with cm as the column model.

Method Summary

void	columnAdded(TableColumnModelEvent e)
int	columnAtPoint(Point point) Returns the index of the column that point lies in, or -1 if it lies outside the receiver's bounds.
void	columnMarginChanged(ChangeEvent e)
void	columnMoved(TableColumnModelEvent e)
void	columnRemoved(TableColumnModelEvent e)
void	columnSelectionChanged(ListSelectionEvent e)
protected TableColumnModel	createDefaultColumnModel() Returns the default column model object which is a DefaultTableColumnModel.
AccessibleContext	getAccessibleContext() Get the AccessibleContext associated with this JComponent
TableColumnModel	getColumnModel() Returns the TableColumnModel that contains all column inforamtion of this table header.
TableColumn	getDraggedColumn() Returns the the dragged column, if and only if a drag is in process.
int	getDraggedDistance() Returns the column's horizontal distance from its original position, if and only if a drag is in process.
Rectangle	getHeaderRect(int columnIndex) Returns the rectangle containing the header tile at columnIndex.
boolean	getReorderingAllowed() Returns true if the receiver allows the user to rearrange columns by dragging their headers, false otherwise.
boolean	getResizingAllowed() Returns true if the receiver allows the user to resize columns by dragging between their headers, false otherwise.
TableColumn	getResizingColumn() Returns the resizing column.
JTable	getTable() Returns the header's partner table
String	getToolTipText(MouseEvent event) Overriding to allow renderer's tips to be used if it has text set.
TableHeaderUI	getUI() Returns the L&F object that renders this component.
String	getUIClassID() Returns the name of the L&F class that renders this component.
boolean	getUpdateTableInRealTime() Returns true if the receiver updates the body of the table view in real time when a column is resized or dragged.
protected void	initializeLocalVars()
protected String	paramString() Returns a string representation of this JTableHeader.
void	resizeAndRepaint() Properly sizes the receiver and its header view, and marks it as needing display.
void	setColumnModel(TableColumnModel newModel) Sets the column model for this table to newModel and registers with for listner notifications from the new column model.
void	setDraggedColumn(TableColumn aColumn) Sets the header's draggedColumn to aColumn
void	setDraggedDistance(int distance) Sets the header's draggedDistance to distance
void	setReorderingAllowed(boolean b) Sets whether the user can drag column headers to reorder columns.
void	setResizingAllowed(boolean b) Sets whether the user can resize columns by dragging between headers.
void	setResizingColumn(TableColumn aColumn) Sets the header's resizingColumn to aColumn
void	setTable(JTable aTable) Sets the header's partner table to aTable
void	setUI(TableHeaderUI ui) Sets the L&F object that renders this component.
void	setUpdateTableInRealTime(boolean flag) Sets whether the body of the table updates in real time when a column is resized or dragged.
void	updateUI() Notification from the UIManager that the L&F has changed.

Methods inherited from class javax.swing.JComponent

addAncestorListener, addNotify, addPropertyChangeListener, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getAlignmentX, getAlignmentY, getAutoscrolls, getBorder, getBounds, getClientProperty, getComponentGraphics, getConditionForKeyStroke, getDebugGraphicsOptions, getGraphics, getHeight, getInsets, getInsets, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getTopLevelAncestor, getVisibleRect, getWidth, getX, getY, grabFocus, hasFocus, isDoubleBuffered, isFocusCycleRoot, isFocusTraversable, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, processComponentKeyEvent, processFocusEvent, processKeyEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removePropertyChangeListener, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setDebugGraphicsOptions, setDoubleBuffered, setEnabled, setFont, setForeground, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setUI, setVisible, unregisterKeyboardAction, update

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getLayout, insets, invalidate, isAncestorOf, layout, list, list, locate, minimumSize, paintComponents, preferredSize, print, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setLayout, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addPropertyChangeListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, disable, disableEvents, dispatchEvent, enable, enable, enableEvents, enableInputMethods, getBackground, getBounds, getColorModel, getComponentOrientation, getCursor, getDropTarget, getFont, getFontMetrics, getForeground, getInputContext, getInputMethodRequests, getLocale, getLocation, getLocationOnScreen, getName, getParent, getPeer, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hide, imageUpdate, inside, isDisplayable, isEnabled, isLightweight, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, printAll, processComponentEvent, processInputMethodEvent, processMouseEvent, remove, removeComponentListener, removeFocusListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removePropertyChangeListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

table

protected JTable table

columnModel

protected TableColumnModel columnModel

The TableColumnModel of the table header

reorderingAllowed

protected boolean reorderingAllowed

Reordering of columns are allowed by the user

resizingAllowed

protected boolean resizingAllowed

Resizing of columns are allowed by the user

updateTableInRealTime

protected boolean updateTableInRealTime

If this flag is true, then the header will repaint the table as a column is dragged or resized.

resizingColumn

protected transient TableColumn resizingColumn

The index of the column being resized. 0 if not resizing

draggedColumn

protected transient TableColumn draggedColumn

The index of the column being dragged. 0 if not dragging

draggedDistance

protected transient int draggedDistance

The distance from its original position the column has been dragged

Constructor Detail

JTableHeader

public JTableHeader()

Constructs a JTableHeader with a default TableColumnModel

See Also:

createDefaultColumnModel()

JTableHeader

public JTableHeader(TableColumnModel cm)

Constructs a JTableHeader which is initialized with cm as the column model. If cm is null this method will initialize the table header with a default TableColumnModel.

Parameters:

cm - The column model for the table

See Also:

createDefaultColumnModel()

Method Detail

setTable

public void setTable(JTable aTable)

Sets the header's partner table to aTable

getTable

public JTable getTable()

Returns the header's partner table

setReorderingAllowed

public void setReorderingAllowed(boolean b)

Sets whether the user can drag column headers to reorder columns.

Parameters:

flag - true if the table view should allow reordering

See Also:

getReorderingAllowed()

getReorderingAllowed

public boolean getReorderingAllowed()

Returns true if the receiver allows the user to rearrange columns by dragging their headers, false otherwise. The default is true. You can rearrange columns programmatically regardless of this setting.

Returns:

true if the receiver allows the user to rearrange columns by dragging their headers, false otherwise

See Also:

setReorderingAllowed(boolean)

setResizingAllowed

public void setResizingAllowed(boolean b)

Sets whether the user can resize columns by dragging between headers.

Parameters:

flag - true if table view should allow resizing

See Also:

getResizingAllowed()

getResizingAllowed

public boolean getResizingAllowed()

Returns true if the receiver allows the user to resize columns by dragging between their headers, false otherwise. The default is true. You can resize columns programmatically regardless of this setting.

Returns:

true if the receiver allows the user to resize columns by dragging between their headers, false otherwise.

See Also:

setResizingAllowed(boolean)

getDraggedColumn

public TableColumn getDraggedColumn()

Returns the the dragged column, if and only if a drag is in process.

Returns:

the the dragged column, if and only if a drag is in process, otherwise returns null.

See Also:

getDraggedDistance()

getDraggedDistance

public int getDraggedDistance()

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.

Returns:

the column's horizontal distance from its original position, if and only if a drag is in process

See Also:

getDraggedColumn()

getResizingColumn

public TableColumn getResizingColumn()

Returns the resizing column. If no column is being resized this method returns null.

Returns:

the resizing column

setUpdateTableInRealTime

public void setUpdateTableInRealTime(boolean flag)

Sets whether the body of the table updates in real time when a column is resized or dragged.

Parameters:

flag - true if tableView should update the body of the table in real time

See Also:

getUpdateTableInRealTime()

getUpdateTableInRealTime

public boolean getUpdateTableInRealTime()

Returns true if the receiver updates the body of the table view in real time when a column is resized or dragged. User can set this flag to false to speed up the table's response to user resize or drag actions. The default is true.

Returns:

true if the table updates in real time

See Also:

setUpdateTableInRealTime(boolean)

columnAtPoint

public int columnAtPoint(Point point)

Returns the index of the column that point lies in, or -1 if it lies outside the receiver's bounds.

Returns:

the index of the column that point lies in, or -1 if it lies outside the receiver's bounds

getHeaderRect

public Rectangle getHeaderRect(int columnIndex)

Returns the rectangle containing the header tile at columnIndex.

Returns:

the rectangle containing the header tile at columnIndex

Throws:

IllegalArgumentException - If columnIndex is out of range

getToolTipText

public String getToolTipText(MouseEvent event)

Overriding to allow renderer's tips to be used if it has text set.

Overrides:

getToolTipText in class JComponent

getUI

public TableHeaderUI getUI()

Returns the L&F object that renders this component.

Returns:

the TableHeaderUI object that renders this component

setUI

public void setUI(TableHeaderUI ui)

Sets the L&F object that renders this component.

Parameters:

ui - the TableHeaderUI L&F object

See Also:

UIDefaults.getUI(javax.swing.JComponent)

updateUI

public void updateUI()

Notification from the UIManager that the L&F has changed. Replaces the current UI object with the latest version from the UIManager.

Overrides:

updateUI in class JComponent

See Also:

JComponent.updateUI()

getUIClassID

public String getUIClassID()

Returns the name of the L&F class that renders this component.

Returns:

"TableHeaderUI"

Overrides:

getUIClassID in class JComponent

See Also:

JComponent.getUIClassID(), UIDefaults.getUI(javax.swing.JComponent)

setColumnModel

public void setColumnModel(TableColumnModel newModel)

Sets the column model for this table to newModel and registers with for listner notifications from the new column model.

Parameters:

newModel - the new data source for this table

Throws:

IllegalArgumentException - if newModel is null

See Also:

getColumnModel()

getColumnModel

public TableColumnModel getColumnModel()

Returns the TableColumnModel that contains all column inforamtion of this table header.

Returns:

the object that provides the column state of the table

See Also:

#setColumnModel()

columnAdded

public void columnAdded(TableColumnModelEvent e)

Specified by:

columnAdded in interface TableColumnModelListener

columnRemoved

public void columnRemoved(TableColumnModelEvent e)

Specified by:

columnRemoved in interface TableColumnModelListener

columnMoved

public void columnMoved(TableColumnModelEvent e)

Specified by:

columnMoved in interface TableColumnModelListener

columnMarginChanged

public void columnMarginChanged(ChangeEvent e)

Specified by:

columnMarginChanged in interface TableColumnModelListener

columnSelectionChanged

public void columnSelectionChanged(ListSelectionEvent e)

Specified by:

columnSelectionChanged in interface TableColumnModelListener

createDefaultColumnModel

protected TableColumnModel createDefaultColumnModel()

Returns the default column model object which is a DefaultTableColumnModel. Subclass can override this method to return a different column model object

Returns:

the default column model object

initializeLocalVars

protected void initializeLocalVars()

resizeAndRepaint

public void resizeAndRepaint()

Properly sizes the receiver and its header view, and marks it as needing display. Also resets cursor rectangles for the header view and line scroll amounts for the JScrollPane.

setDraggedColumn

public void setDraggedColumn(TableColumn aColumn)

Sets the header's draggedColumn to aColumn

setDraggedDistance

public void setDraggedDistance(int distance)

Sets the header's draggedDistance to distance

setResizingColumn

public void setResizingColumn(TableColumn aColumn)

Sets the header's resizingColumn to aColumn

paramString

protected String paramString()

Returns a string representation of this JTableHeader. 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 null.

Overriding paramString() to provide information about the specific new aspects of the JFC components.

Returns:

a string representation of this JTableHeader.

Overrides:

paramString in class JComponent

getAccessibleContext

public AccessibleContext getAccessibleContext()

Get the AccessibleContext associated with this JComponent

Specified by:

getAccessibleContext in interface Accessible

Returns:

the AccessibleContext of this JComponent

Overrides:

getAccessibleContext in class JComponent