Java javax.swing.plaf.basic Class BasicOptionPaneUI（JDK8）

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Java™ Platform
Standard Ed. 8

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Method

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

Direct Known Subclasses:

SynthOptionPaneUI
```
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

Nested Classes
Modifier and Type	Class and Description
`class`	`BasicOptionPaneUI.ButtonActionListener` This class should be treated as a "protected" inner class.
`static class`	`BasicOptionPaneUI.ButtonAreaLayout` `ButtonAreaLayout` behaves in a similar manner to `FlowLayout`.
`class`	`BasicOptionPaneUI.PropertyChangeHandler` This class should be treated as a "protected" inner class.

Field Summary

Fields
Modifier and Type	Field and Description
`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

Constructors

Constructor and Description

BasicOptionPaneUI()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`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

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Java™ Platform
Standard Ed. 8

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Detail:
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Java javax.swing.plaf.basic Class BasicOptionPaneUI（JDK8）

Class BasicOptionPaneUI

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class javax.swing.plaf.ComponentUI

Methods inherited from class java.lang.Object

Field Detail

MinimumWidth

MinimumHeight

optionPane

minimumSize

inputComponent

initialFocusComponent

hasCustomComponents

propertyChangeListener

Constructor Detail

BasicOptionPaneUI

Method Detail

createUI

installUI

uninstallUI

installDefaults

uninstallDefaults

installComponents

uninstallComponents

createLayoutManager

installListeners

uninstallListeners

createPropertyChangeListener

installKeyboardActions

uninstallKeyboardActions

getMinimumOptionPaneSize

getPreferredSize

createMessageArea

addMessageComponents

getMessage

addIcon

getIcon

getIconForType

getMaxCharactersPerLineCount

burstStringInto

createSeparator

createButtonArea

addButtonComponents

createButtonActionListener

getButtons

getSizeButtonsToSameWidth

getInitialValueIndex

resetInputValue

selectInitialValue

containsCustomComponents