Java™ Platform
Standard Ed. 6

javax.swing.plaf.basic
Class BasicOptionPaneUI

java.lang.Object
  extended by javax.swing.plaf.ComponentUI
      extended by javax.swing.plaf.OptionPaneUI
          extended by javax.swing.plaf.basic.BasicOptionPaneUI

public class BasicOptionPaneUI
extends OptionPaneUI

Provides the basic look and feel for a JOptionPane. BasicMessagePaneUI provides a means to place an icon, message and buttons into a Container. Generally, the layout will look like:

        ------------------
        | i | message    |
        | c | message    |
        | o | message    |
        | n | message    |
        ------------------
        |     buttons    |
        |________________|
 
icon is an instance of Icon that is wrapped inside a JLabel. The message is an opaque object and is tested for the following: if the message is a Component it is added to the Container, if it is an Icon it is wrapped inside a JLabel and added to the Container otherwise it is wrapped inside a JLabel.

The above layout is used when the option pane's ComponentOrientation property is horizontal, left-to-right. The layout will be adjusted appropriately for other orientations.

The Container, message, icon, and buttons are all determined from abstract methods.


Nested Class Summary
 class BasicOptionPaneUI.ButtonActionListener
          This inner class is marked "public" due to a compiler bug.
static class BasicOptionPaneUI.ButtonAreaLayout
          ButtonAreaLayout behaves in a similar manner to FlowLayout.
 class BasicOptionPaneUI.PropertyChangeHandler
          This inner class is marked "public" due to a compiler bug.
 
Field Summary
protected  boolean hasCustomComponents
          This is set to true in validateComponent if a Component is contained in either the message or the buttons.
protected  Component initialFocusComponent
          Component to receive focus when messaged with selectInitialValue.
protected  JComponent inputComponent
          JComponent provide for input if optionPane.getWantsInput() returns true.
static int MinimumHeight
           
protected  Dimension minimumSize
           
static int MinimumWidth
           
protected  JOptionPane optionPane
          JOptionPane that the receiver is providing the look and feel for.
protected  PropertyChangeListener propertyChangeListener
           
 
Constructor Summary
BasicOptionPaneUI()
           
 
Method Summary
protected  void addButtonComponents(Container container, Object[] buttons, int initialIndex)
          Creates the appropriate object to represent each of the objects in buttons and adds it to container.
protected  void addIcon(Container top)
          Creates and adds a JLabel representing the icon returned from getIcon to top.
protected  void addMessageComponents(Container container, GridBagConstraints cons, Object msg, int maxll, boolean internallyCreated)
          Creates the appropriate object to represent msg and places it into container.
protected  void burstStringInto(Container c, String d, int maxll)
          Recursively creates new JLabel instances to represent d.
 boolean containsCustomComponents(JOptionPane op)
          Returns true if in the last call to validateComponent the message or buttons contained a subclass of Component.
protected  ActionListener createButtonActionListener(int buttonIndex)
           
protected  Container createButtonArea()
          Creates and returns a Container containing the buttons.
protected  LayoutManager createLayoutManager()
           
protected  Container createMessageArea()
          Messaged from installComponents to create a Container containing the body of the message.
protected  PropertyChangeListener createPropertyChangeListener()
           
protected  Container createSeparator()
           
static ComponentUI createUI(JComponent x)
          Creates a new BasicOptionPaneUI instance.
protected  Object[] getButtons()
          Returns the buttons to display from the JOptionPane the receiver is providing the look and feel for.
protected  Icon getIcon()
          Returns the icon from the JOptionPane the receiver is providing the look and feel for, or the default icon as returned from getDefaultIcon.
protected  Icon getIconForType(int messageType)
          Returns the icon to use for the passed in type.
protected  int getInitialValueIndex()
          Returns the initial index into the buttons to select.
protected  int getMaxCharactersPerLineCount()
          Returns the maximum number of characters to place on a line.
protected  Object getMessage()
          Returns the message to display from the JOptionPane the receiver is providing the look and feel for.
 Dimension getMinimumOptionPaneSize()
          Returns the minimum size the option pane should be.
 Dimension getPreferredSize(JComponent c)
          If c is the JOptionPane the receiver is contained in, the preferred size that is returned is the maximum of the preferred size of the LayoutManager for the JOptionPane, and getMinimumOptionPaneSize.
protected  boolean getSizeButtonsToSameWidth()
          Returns true, basic L&F wants all the buttons to have the same width.
protected  void installComponents()
           
protected  void installDefaults()
           
protected  void installKeyboardActions()
           
protected  void installListeners()
           
 void installUI(JComponent c)
          Installs the receiver as the L&F for the passed in JOptionPane.
protected  void resetInputValue()
          Sets the input value in the option pane the receiver is providing the look and feel for based on the value in the inputComponent.
 void selectInitialValue(JOptionPane op)
          If inputComponent is non-null, the focus is requested on that, otherwise request focus on the default value
protected  void uninstallComponents()
           
protected  void uninstallDefaults()
           
protected  void uninstallKeyboardActions()
           
protected  void uninstallListeners()
           
 void uninstallUI(JComponent c)
          Removes the receiver from the L&F controller of the passed in split pane.
 
Methods inherited from class javax.swing.plaf.ComponentUI
contains, getAccessibleChild, getAccessibleChildrenCount, getBaseline, getBaselineResizeBehavior, getMaximumSize, getMinimumSize, paint, update
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

MinimumWidth

public static final int MinimumWidth
See Also:
Constant Field Values

MinimumHeight

public static final int MinimumHeight
See Also:
Constant Field Values

optionPane

protected JOptionPane optionPane
JOptionPane that the receiver is providing the look and feel for.


minimumSize

protected Dimension minimumSize

inputComponent

protected JComponent inputComponent
JComponent provide for input if optionPane.getWantsInput() returns true.


initialFocusComponent

protected Component initialFocusComponent
Component to receive focus when messaged with selectInitialValue.


hasCustomComponents

protected boolean hasCustomComponents
This is set to true in validateComponent if a Component is contained in either the message or the buttons.


propertyChangeListener

protected PropertyChangeListener propertyChangeListener
Constructor Detail

BasicOptionPaneUI

public BasicOptionPaneUI()
Method Detail

createUI

public static ComponentUI createUI(JComponent x)
Creates a new BasicOptionPaneUI instance.


installUI

public void installUI(JComponent c)
Installs the receiver as the L&F for the passed in JOptionPane.

Overrides:
installUI in class ComponentUI
Parameters:
c - the component where this UI delegate is being installed
See Also:
ComponentUI.uninstallUI(javax.swing.JComponent), JComponent.setUI(javax.swing.plaf.ComponentUI), JComponent.updateUI()

uninstallUI

public void uninstallUI(JComponent c)
Removes the receiver from the L&F controller of the passed in split pane.

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

installDefaults

protected void installDefaults()

uninstallDefaults

protected void uninstallDefaults()

installComponents

protected void installComponents()

uninstallComponents

protected void uninstallComponents()

createLayoutManager

protected LayoutManager createLayoutManager()

installListeners

protected void installListeners()

uninstallListeners

protected void uninstallListeners()

createPropertyChangeListener

protected PropertyChangeListener createPropertyChangeListener()

installKeyboardActions

protected void installKeyboardActions()

uninstallKeyboardActions

protected void uninstallKeyboardActions()

getMinimumOptionPaneSize

public Dimension getMinimumOptionPaneSize()
Returns the minimum size the option pane should be. Primarily provided for subclassers wishing to offer a different minimum size.


getPreferredSize

public Dimension getPreferredSize(JComponent c)
If c is the JOptionPane the receiver is contained in, the preferred size that is returned is the maximum of the preferred size of the LayoutManager for the JOptionPane, and getMinimumOptionPaneSize.

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
See Also:
JComponent.getPreferredSize(), LayoutManager.preferredLayoutSize(java.awt.Container)

createMessageArea

protected Container createMessageArea()
Messaged from installComponents to create a Container containing the body of the message. The icon is the created by calling addIcon.


addMessageComponents

protected void addMessageComponents(Container container,
                                    GridBagConstraints cons,
                                    Object msg,
                                    int maxll,
                                    boolean internallyCreated)
Creates the appropriate object to represent msg and places it into container. If msg is an instance of Component, it is added directly, if it is an Icon, a JLabel is created to represent it, otherwise a JLabel is created for the string, if d is an Object[], this method will be recursively invoked for the children. internallyCreated is true if Objc is an instance of Component and was created internally by this method (this is used to correctly set hasCustomComponents only if !internallyCreated).


getMessage

protected Object getMessage()
Returns the message to display from the JOptionPane the receiver is providing the look and feel for.


addIcon

protected void addIcon(Container top)
Creates and adds a JLabel representing the icon returned from getIcon to top. This is messaged from createMessageArea


getIcon

protected Icon getIcon()
Returns the icon from the JOptionPane the receiver is providing the look and feel for, or the default icon as returned from getDefaultIcon.


getIconForType

protected Icon getIconForType(int messageType)
Returns the icon to use for the passed in type.


getMaxCharactersPerLineCount

protected int getMaxCharactersPerLineCount()
Returns the maximum number of characters to place on a line.


burstStringInto

protected void burstStringInto(Container c,
                               String d,
                               int maxll)
Recursively creates new JLabel instances to represent d. Each JLabel instance is added to c.


createSeparator

protected Container createSeparator()

createButtonArea

protected Container createButtonArea()
Creates and returns a Container containing the buttons. The buttons are created by calling getButtons.


addButtonComponents

protected void addButtonComponents(Container container,
                                   Object[] buttons,
                                   int initialIndex)
Creates the appropriate object to represent each of the objects in buttons and adds it to container. This differs from addMessageComponents in that it will recurse on buttons and that if button is not a Component it will create an instance of JButton.


createButtonActionListener

protected ActionListener createButtonActionListener(int buttonIndex)

getButtons

protected Object[] getButtons()
Returns the buttons to display from the JOptionPane the receiver is providing the look and feel for. If the JOptionPane has options set, they will be provided, otherwise if the optionType is YES_NO_OPTION, yesNoOptions is returned, if the type is YES_NO_CANCEL_OPTION yesNoCancelOptions is returned, otherwise defaultButtons are returned.


getSizeButtonsToSameWidth

protected boolean getSizeButtonsToSameWidth()
Returns true, basic L&F wants all the buttons to have the same width.


getInitialValueIndex

protected int getInitialValueIndex()
Returns the initial index into the buttons to select. The index is calculated from the initial value from the JOptionPane and options of the JOptionPane or 0.


resetInputValue

protected void resetInputValue()
Sets the input value in the option pane the receiver is providing the look and feel for based on the value in the inputComponent.


selectInitialValue

public void selectInitialValue(JOptionPane op)
If inputComponent is non-null, the focus is requested on that, otherwise request focus on the default value

Specified by:
selectInitialValue in class OptionPaneUI

containsCustomComponents

public boolean containsCustomComponents(JOptionPane op)
Returns true if in the last call to validateComponent the message or buttons contained a subclass of Component.

Specified by:
containsCustomComponents in class OptionPaneUI

Java™ Platform
Standard Ed. 6

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