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BasicOptionPaneUI (Java 2 Platform SE v1.4.1) - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

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javax.swing.plaf.basic
Class BasicOptionPaneUI

java.lang.Object
  |
  +--javax.swing.plaf.ComponentUI
        |
        +--javax.swing.plaf.OptionPaneUI
              |
              +--javax.swing.plaf.basic.BasicOptionPaneUI

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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.

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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.
Dimension	getMaximumSize(JComponent c)           Messages getPreferredSize.
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	getMinimumSize(JComponent c)           Messages getPreferredSize.
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, 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

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MinimumHeight

public static final int MinimumHeight

See Also:

Constant Field Values

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optionPane

protected JOptionPane optionPane

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

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minimumSize

protected Dimension minimumSize

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inputComponent

protected JComponent inputComponent

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

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initialFocusComponent

protected Component initialFocusComponent

Component to receive focus when messaged with selectInitialValue.

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hasCustomComponents

protected boolean hasCustomComponents

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

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propertyChangeListener

protected PropertyChangeListener propertyChangeListener

Constructor Detail

BasicOptionPaneUI

public BasicOptionPaneUI()

Method Detail

createUI

public static ComponentUI createUI(JComponent x)

Creates a new BasicOptionPaneUI instance.

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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()

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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()

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installDefaults

protected void installDefaults()

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uninstallDefaults

protected void uninstallDefaults()

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installComponents

protected void installComponents()

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uninstallComponents

protected void uninstallComponents()

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createLayoutManager

protected LayoutManager createLayoutManager()

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installListeners

protected void installListeners()

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uninstallListeners

protected void uninstallListeners()

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createPropertyChangeListener

protected PropertyChangeListener createPropertyChangeListener()

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installKeyboardActions

protected void installKeyboardActions()

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uninstallKeyboardActions

protected void uninstallKeyboardActions()

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getMinimumOptionPaneSize

public Dimension getMinimumOptionPaneSize()

Returns the minimum size the option pane should be. Primarily provided for subclassers wishing to offer a different minimum size.

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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)

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getMinimumSize

public Dimension getMinimumSize(JComponent c)

Messages getPreferredSize.

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(java.awt.Container), ComponentUI.getPreferredSize(javax.swing.JComponent)

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getMaximumSize

public Dimension getMaximumSize(JComponent c)

Messages getPreferredSize.

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(java.awt.Container)

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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.

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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).

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getMessage

protected Object getMessage()

Returns the message to display from the JOptionPane the receiver is providing the look and feel for.

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addIcon

protected void addIcon(Container top)

Creates and adds a JLabel representing the icon returned from getIcon to top. This is messaged from createMessageArea

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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.

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getIconForType

protected Icon getIconForType(int messageType)

Returns the icon to use for the passed in type.

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getMaxCharactersPerLineCount

protected int getMaxCharactersPerLineCount()

Returns the maximum number of characters to place on a line.

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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.

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createSeparator

protected Container createSeparator()

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createButtonArea

protected Container createButtonArea()

Creates and returns a Container containing the buttons. The buttons are created by calling getButtons.

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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.

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createButtonActionListener

protected ActionListener createButtonActionListener(int buttonIndex)

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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.

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getSizeButtonsToSameWidth

protected boolean getSizeButtonsToSameWidth()

Returns true, basic L&F wants all the buttons to have the same width.

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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.

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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.

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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

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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

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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright 2002 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.