org.jdesktop.swingx.plaf.basic

Class BasicHeaderUI

java.lang.Object

javax.swing.plaf.ComponentUI

javax.swing.plaf.PanelUI

org.jdesktop.swingx.plaf.HeaderUI

org.jdesktop.swingx.plaf.basic.BasicHeaderUI

public class BasicHeaderUI
extends HeaderUI

Base implementation of Header UI.

PENDING JW: This implementation is unusual in that it does not keep a reference to the component it controls. Typically, such is only the case if the ui is shared between instances. Historical? A consequence is that the un/install methods need to carry the header as parameter. Which looks funny when at the same time the children of the header are instance fields in this. Should think about cleanup: either get rid off the instance fields here, or reference the header and remove the param (would break subclasses).

PENDING JW: keys for uidefaults are inconsistent - most have prefix "JXHeader." while defaultIcon has prefix "Header."

Constructor Summary

Constructors

Constructor and Description
BasicHeaderUI() Creates a new instance of BasicHeaderUI

Method Summary

Modifier and Type	Method and Description
static javax.swing.plaf.ComponentUI	createUI(javax.swing.JComponent c) Returns an instance of the UI delegate for the specified component.
void	installUI(javax.swing.JComponent c) Configures the specified component appropriate for the look and feel.
void	uninstallUI(javax.swing.JComponent c) Reverses configuration which was done on the specified component during installUI.

Methods inherited from class javax.swing.plaf.ComponentUI

contains, getAccessibleChild, getAccessibleChildrenCount, getBaseline, getBaselineResizeBehavior, getMaximumSize, getMinimumSize, getPreferredSize, paint, update

Methods inherited from class java.lang.Object

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

Constructor Detail

BasicHeaderUI

public BasicHeaderUI()

Creates a new instance of BasicHeaderUI

Method Detail

createUI

public static javax.swing.plaf.ComponentUI createUI(javax.swing.JComponent c)

Returns an instance of the UI delegate for the specified component. Each subclass must provide its own static createUI method that returns an instance of that UI delegate subclass. If the UI delegate subclass is stateless, it may return an instance that is shared by multiple components. If the UI delegate is stateful, then it should return a new instance per component. The default implementation of this method throws an error, as it should never be invoked.

installUI

public void installUI(javax.swing.JComponent c)

Configures the specified component appropriate 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 any 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 javax.swing.plaf.ComponentUI

Parameters:

c - the component where this UI delegate is being installed

See Also:

uninstallUI(javax.swing.JComponent), JComponent.setUI(javax.swing.plaf.ComponentUI), JComponent.updateUI()

uninstallUI

public void uninstallUI(javax.swing.JComponent c)

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 javax.swing.plaf.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:

installUI(javax.swing.JComponent), JComponent.updateUI()