public class

BasicButtonUI

extends ButtonUI
java.lang.Object
   ↳ javax.swing.plaf.ComponentUI
     ↳ javax.swing.plaf.ButtonUI
       ↳ javax.swing.plaf.basic.BasicButtonUI
Known Direct Subclasses
Known Indirect Subclasses

Class Overview

BasicButton implementation

Summary

Fields
protected int defaultTextIconGap
protected int defaultTextShiftOffset
Public Constructors
BasicButtonUI()
Public Methods
static ComponentUI createUI(JComponent c)
int getBaseline(JComponent c, int width, int height)
Returns the baseline.
Component.BaselineResizeBehavior getBaselineResizeBehavior(JComponent c)
Returns an enum indicating how the baseline of the component changes as the size changes.
int getDefaultTextIconGap(AbstractButton b)
Dimension getMaximumSize(JComponent c)
Returns the specified component's maximum size appropriate for the look and feel.
Dimension getMinimumSize(JComponent c)
Returns the specified component's minimum size appropriate for the look and feel.
Dimension getPreferredSize(JComponent c)
Returns the specified component's preferred size appropriate for the look and feel.
void installUI(JComponent c)
Configures the specified component appropriate for the look and feel.
void paint(Graphics g, JComponent c)
Paints the specified component appropriate for the look and feel.
void uninstallUI(JComponent c)
Reverses configuration which was done on the specified component during installUI.
Protected Methods
void clearTextShiftOffset()
BasicButtonListener createButtonListener(AbstractButton b)
String getPropertyPrefix()
int getTextShiftOffset()
void installDefaults(AbstractButton b)
void installKeyboardActions(AbstractButton b)
void installListeners(AbstractButton b)
void paintButtonPressed(Graphics g, AbstractButton b)
void paintFocus(Graphics g, AbstractButton b, Rectangle viewRect, Rectangle textRect, Rectangle iconRect)
void paintIcon(Graphics g, JComponent c, Rectangle iconRect)
void paintText(Graphics g, JComponent c, Rectangle textRect, String text)
As of Java 2 platform v 1.4 this method should not be used or overriden.
void paintText(Graphics g, AbstractButton b, Rectangle textRect, String text)
Method which renders the text of the current button.
void setTextShiftOffset()
void uninstallDefaults(AbstractButton b)
void uninstallKeyboardActions(AbstractButton b)
void uninstallListeners(AbstractButton b)
[Expand]
Inherited Methods
From class javax.swing.plaf.ComponentUI
From class java.lang.Object

Fields

protected int defaultTextIconGap

protected int defaultTextShiftOffset

Public Constructors

public BasicButtonUI ()

Public Methods

public static ComponentUI createUI (JComponent c)

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

Returns the baseline.

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

public Component.BaselineResizeBehavior getBaselineResizeBehavior (JComponent c)

Returns an enum indicating how the baseline of the component changes as the size changes.

Parameters
c JComponent to return baseline resize behavior for
Returns
  • an enum indicating how the baseline changes as the component size changes

public int getDefaultTextIconGap (AbstractButton b)

public Dimension getMaximumSize (JComponent c)

Returns the specified component's maximum size appropriate for the look and feel. If null is returned, the maximum size will be calculated by the component's layout manager instead (this is the preferred approach for any component with a specific layout manager installed). The default implementation of this method invokes getPreferredSize and returns that value.

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

public Dimension getMinimumSize (JComponent c)

Returns the specified component's minimum size appropriate for the look and feel. If null is returned, the minimum size will be calculated by the component's layout manager instead (this is the preferred approach for any component with a specific layout manager installed). The default implementation of this method invokes getPreferredSize and returns that value.

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

public Dimension getPreferredSize (JComponent c)

Returns the specified component's preferred size appropriate for the look and feel. If null is returned, the preferred size will be calculated by the component's layout manager instead (this is the preferred approach for any component with a specific layout manager installed). The default implementation of this method returns null.

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

public void installUI (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.

Parameters
c the component where this UI delegate is being installed

public void paint (Graphics g, JComponent c)

Paints the specified component appropriate 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.

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

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.

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

Protected Methods

protected void clearTextShiftOffset ()

protected BasicButtonListener createButtonListener (AbstractButton b)

protected String getPropertyPrefix ()

protected int getTextShiftOffset ()

protected void installDefaults (AbstractButton b)

protected void installKeyboardActions (AbstractButton b)

protected void installListeners (AbstractButton b)

protected void paintButtonPressed (Graphics g, AbstractButton b)

protected void paintFocus (Graphics g, AbstractButton b, Rectangle viewRect, Rectangle textRect, Rectangle iconRect)

protected void paintIcon (Graphics g, JComponent c, Rectangle iconRect)

protected void paintText (Graphics g, JComponent c, Rectangle textRect, String text)

As of Java 2 platform v 1.4 this method should not be used or overriden. Use the paintText method which takes the AbstractButton argument.

protected void paintText (Graphics g, AbstractButton b, Rectangle textRect, String text)

Method which renders the text of the current button.

Parameters
g Graphics context
b Current button to render
textRect Bounding rectangle to render the text.
text String to render

protected void setTextShiftOffset ()

protected void uninstallDefaults (AbstractButton b)

protected void uninstallKeyboardActions (AbstractButton b)

protected void uninstallListeners (AbstractButton b)