Class BasicTableHeaderUI

java.lang.Object

javax.swing.plaf.ComponentUI

javax.swing.plaf.TableHeaderUI

javax.swing.plaf.basic.BasicTableHeaderUI

Direct Known Subclasses:

SynthTableHeaderUI

public class BasicTableHeaderUI
extends TableHeaderUI

BasicTableHeaderUI implementation

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	BasicTableHeaderUI.MouseInputHandler	This class should be treated as a "protected" inner class.

Field Summary

Fields

Modifier and Type	Field	Description
protected JTableHeader	header	The JTableHeader that is delegating the painting to this UI.
protected MouseInputListener	mouseInputListener	Listeners that are attached to the JTable
protected CellRendererPane	rendererPane	The instance of CellRendererPane.

Constructor Summary

Constructors

Constructor	Description
BasicTableHeaderUI()	Constructs a BasicTableHeaderUI.

Method Summary

Modifier and Type	Method	Description
protected MouseInputListener	createMouseInputListener()	Creates the mouse listener for the JTableHeader.
static ComponentUI	createUI(JComponent h)	Returns a new instance of BasicTableHeaderUI.
int	getBaseline(JComponent c, int width, int height)	Returns the baseline.
Dimension	getMaximumSize(JComponent c)	Return the maximum size of the header.
Dimension	getMinimumSize(JComponent c)	Return the minimum size of the header.
Dimension	getPreferredSize(JComponent c)	Return the preferred size of the header.
protected int	getRolloverColumn()	Returns the index of the column header over which the mouse currently is.
protected void	installDefaults()	Initializes JTableHeader properties such as font, foreground, and background.
protected void	installKeyboardActions()	Register all keyboard actions on the JTableHeader.
protected void	installListeners()	Attaches listeners to the JTableHeader.
void	installUI(JComponent c)	Configures the specified component appropriately for the look and feel.
void	paint(Graphics g, JComponent c)	Paints the specified component appropriately for the look and feel.
protected void	rolloverColumnUpdated(int oldColumn, int newColumn)	This method gets called every time when a rollover column in the table header is updated.
protected void	uninstallDefaults()	Uninstalls default properties
protected void	uninstallKeyboardActions()	Unregisters default key actions.
protected void	uninstallListeners()	Unregisters listeners.
void	uninstallUI(JComponent c)	Reverses configuration which was done on the specified component during installUI.

Methods inherited from class ComponentUI

contains, getAccessibleChild, getAccessibleChildrenCount, getBaselineResizeBehavior, update

Methods inherited from class Object

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

Field Details

header

protected JTableHeader header

The JTableHeader that is delegating the painting to this UI.

rendererPane

protected CellRendererPane rendererPane

The instance of CellRendererPane.

mouseInputListener

protected MouseInputListener mouseInputListener

Listeners that are attached to the JTable

Constructor Details

BasicTableHeaderUI

public BasicTableHeaderUI()

Constructs a BasicTableHeaderUI.

Method Details

createMouseInputListener

protected MouseInputListener createMouseInputListener()

Creates the mouse listener for the JTableHeader.

Returns:

the mouse listener for the JTableHeader

createUI

public static ComponentUI createUI(JComponent h)

Returns a new instance of BasicTableHeaderUI.

Parameters:

h - a component.

Returns:

a new instance of BasicTableHeaderUI

installUI

public void installUI(JComponent c)

Description copied from class: ComponentUI

Configures the specified component appropriately for the look and feel. This method is invoked when the ComponentUI instance is being installed as the UI delegate on the specified component. This method should completely configure the component for the look and feel, including the following:

1. Install default property values for color, fonts, borders, icons, opacity, etc. on the component. Whenever possible, property values initialized by the client program should not be overridden.
2. Install a LayoutManager on the component if necessary.
3. Create/add any required sub-components to the component.
4. Create/install event listeners on the component.
5. Create/install a PropertyChangeListener on the component in order to detect and respond to component property changes appropriately.
6. Install keyboard UI (mnemonics, traversal, etc.) on the component.
7. Initialize any appropriate instance data.

Overrides:

installUI in class ComponentUI

Parameters:

c - the component where this UI delegate is being installed

See Also:

• ComponentUI.uninstallUI(JComponent)
• JComponent.setUI(ComponentUI)
• JComponent.updateUI()

installDefaults

protected void installDefaults()

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 Also:

• installUI(JComponent)

installListeners

protected void installListeners()

Attaches listeners to the JTableHeader.

installKeyboardActions

protected void installKeyboardActions()

Register all keyboard actions on the JTableHeader.

uninstallUI

public void uninstallUI(JComponent c)

Description copied from class: ComponentUI

Reverses configuration which was done on the specified component during installUI. This method is invoked when this UIComponent instance is being removed as the UI delegate for the specified component. This method should undo the configuration performed in installUI, being careful to leave the JComponent instance in a clean state (no extraneous listeners, look-and-feel-specific property objects, etc.). This should include the following:

1. Remove any UI-set borders from the component.
2. Remove any UI-set layout managers on the component.
3. Remove any UI-added sub-components from the component.
4. Remove any UI-added event/property listeners from the component.
5. Remove any UI-installed keyboard UI from the component.
6. Nullify any allocated instance data objects to allow for GC.

Overrides:

uninstallUI in class ComponentUI

Parameters:

c - the component from which this UI delegate is being removed; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components

See Also:

• ComponentUI.installUI(JComponent)
• JComponent.updateUI()

uninstallDefaults

protected void uninstallDefaults()

Uninstalls default properties

uninstallListeners

protected void uninstallListeners()

Unregisters listeners.

uninstallKeyboardActions

protected void uninstallKeyboardActions()

Unregisters default key actions.

getRolloverColumn

protected int getRolloverColumn()

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.

Returns:

the index of the current rollover column

Since:

1.6

See Also:

• rolloverColumnUpdated(int, int)

rolloverColumnUpdated

protected void rolloverColumnUpdated(int oldColumn,
 int newColumn)

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.

Parameters:

oldColumn - the index of the previous rollover column or -1 if the mouse was not over a column

newColumn - the index of the new rollover column or -1 if the mouse is not over a column

Since:

1.6

See Also:

• getRolloverColumn()
• JTableHeader.getHeaderRect(int)

getBaseline

public int getBaseline(JComponent c,
 int width,
 int height)

Returns the baseline.

Overrides:

getBaseline in class ComponentUI

Parameters:

c - JComponent baseline is being requested for

width - the width to get the baseline for

height - the height to get the baseline for

Returns:

baseline or a value < 0 indicating there is no reasonable baseline

Throws:

NullPointerException - if c is null

IllegalArgumentException - if width or height is < 0

Since:

1.6

See Also:

• JComponent.getBaseline(int, int)

paint

public void paint(Graphics g,
 JComponent c)

Description copied from class: ComponentUI

Paints the specified component appropriately for the look and feel. This method is invoked from the ComponentUI.update method when the specified component is being painted. Subclasses should override this method and use the specified Graphics object to render the content of the component.

Overrides:

paint in class ComponentUI

Parameters:

g - the Graphics context in which to paint

c - the component being painted; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components

See Also:

• ComponentUI.update(Graphics, JComponent)

getMinimumSize

public Dimension getMinimumSize(JComponent c)

Return the minimum size of the header. The minimum width is the sum of the minimum widths of each column (plus inter-cell spacing).

Overrides:

getMinimumSize in class ComponentUI

Parameters:

c - the component whose minimum size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components

Returns:

a Dimension object or null

See Also:

• JComponent.getMinimumSize()
• LayoutManager.minimumLayoutSize(Container)
• ComponentUI.getPreferredSize(JComponent)

getPreferredSize

public Dimension getPreferredSize(JComponent c)

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).

Overrides:

getPreferredSize in class ComponentUI

Parameters:

c - the component whose preferred size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components

Returns:

a Dimension object containing given component's preferred size appropriate for the look and feel

See Also:

• JComponent.getPreferredSize()
• LayoutManager.preferredLayoutSize(Container)

getMaximumSize

public Dimension getMaximumSize(JComponent c)

Return the maximum size of the header. The maximum width is the sum of the maximum widths of each column (plus inter-cell spacing).

Overrides:

getMaximumSize in class ComponentUI

Parameters:

c - the component whose maximum size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components

Returns:

a Dimension object or null

See Also:

• JComponent.getMaximumSize()
• LayoutManager2.maximumLayoutSize(Container)