Class SynthViewportUI

java.lang.Object

javax.swing.plaf.ComponentUI

javax.swing.plaf.ViewportUI

javax.swing.plaf.synth.SynthViewportUI

All Implemented Interfaces:

PropertyChangeListener, EventListener, SynthConstants, SynthUI

public class SynthViewportUI
extends ViewportUI
implements PropertyChangeListener, SynthUI

Provides the Synth L&F UI delegate for JViewport.

Since:

1.7

Field Summary

Fields inherited from interface SynthConstants

DEFAULT, DISABLED, ENABLED, FOCUSED, MOUSE_OVER, PRESSED, SELECTED

Constructor Summary

Constructors

Constructor	Description
SynthViewportUI()	Constructs a SynthViewportUI.

Method Summary

Modifier and Type	Method	Description
static ComponentUI	createUI(JComponent c)	Creates a new UI object for the given component.
SynthContext	getContext(JComponent c)	Returns the Context for the specified component.
protected void	installDefaults(JComponent c)	Installs defaults for a viewport.
protected void	installListeners(JComponent c)	Installs listeners into the viewport.
void	installUI(JComponent c)	Configures the specified component appropriately for the look and feel.
void	paint(Graphics g, JComponent c)	Paints the specified component according to the Look and Feel.
protected void	paint(SynthContext context, Graphics g)	Paints the specified component.
void	paintBorder(SynthContext context, Graphics g, int x, int y, int w, int h)	Paints the border.
void	propertyChange(PropertyChangeEvent e)	This method gets called when a bound property is changed.
protected void	uninstallDefaults(JComponent c)	Uninstalls defaults from a viewport.
protected void	uninstallListeners(JComponent c)	Uninstalls listeners from the viewport.
void	uninstallUI(JComponent c)	Reverses configuration which was done on the specified component during installUI.
void	update(Graphics g, JComponent c)	Notifies this UI delegate to repaint the specified component.

Methods inherited from class ComponentUI

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

Methods inherited from class Object

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

Constructor Details

SynthViewportUI

public SynthViewportUI()

Constructs a SynthViewportUI.

Method Details

createUI

public static ComponentUI createUI(JComponent c)

Creates a new UI object for the given component.

Parameters:

c - component to create UI object for

Returns:

the UI object

installUI

public void installUI(JComponent c)

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()

uninstallUI

public void uninstallUI(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 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()

installDefaults

protected void installDefaults(JComponent c)

Installs defaults for a viewport.

Parameters:

c - a JViewport object

installListeners

protected void installListeners(JComponent c)

Installs listeners into the viewport.

Parameters:

c - a JViewport object

uninstallListeners

protected void uninstallListeners(JComponent c)

Uninstalls listeners from the viewport.

Parameters:

c - a JViewport object

uninstallDefaults

protected void uninstallDefaults(JComponent c)

Uninstalls defaults from a viewport.

Parameters:

c - a JViewport object

getContext

public SynthContext getContext(JComponent c)

Returns the Context for the specified component.

Specified by:

getContext in interface SynthUI

Parameters:

c - Component requesting SynthContext.

Returns:

SynthContext describing component.

update

public void update(Graphics g,
 JComponent c)

Notifies this UI delegate to repaint the specified component. This method paints the component background, then calls the paint(SynthContext,Graphics) method.

In general, this method does not need to be overridden by subclasses. All Look and Feel rendering code should reside in the paint method.

Overrides:

update in class ComponentUI

Parameters:

g - the Graphics object used for painting

c - the component being painted

See Also:

• paint(SynthContext,Graphics)

paintBorder

public void paintBorder(SynthContext context,
 Graphics g,
 int x,
 int y,
 int w,
 int h)

Paints the border. The method is never called, because the JViewport class does not support a border. This implementation does nothing.

Specified by:

paintBorder in interface SynthUI

Parameters:

context - a component context

g - the Graphics to paint on

x - the X coordinate

y - the Y coordinate

w - width of the border

h - height of the border

paint

public void paint(Graphics g,
 JComponent c)

Paints the specified component according to the Look and Feel.

This method is not used by Synth Look and Feel. Painting is handled by the paint(SynthContext,Graphics) method.

Overrides:

paint in class ComponentUI

Parameters:

g - the Graphics object used for painting

c - the component being painted

See Also:

• paint(SynthContext,Graphics)

paint

protected void paint(SynthContext context,
 Graphics g)

Paints the specified component. This implementation does nothing.

Parameters:

context - context for the component being painted

g - the Graphics object used for painting

See Also:

• update(Graphics,JComponent)

propertyChange

public void propertyChange(PropertyChangeEvent e)

This method gets called when a bound property is changed.

Specified by:

propertyChange in interface PropertyChangeListener

Parameters:

e - A PropertyChangeEvent object describing the event source and the property that has changed.