Module java.desktop
Package javax.swing.plaf.basic

Class 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.

    • Field Detail

      • MinimumWidth

        public static final int MinimumWidth
        The mininum width of JOptionPane.
        See Also:
        Constant Field Values

      • MinimumHeight

        public static final int MinimumHeight
        The mininum height of JOptionPane.
        See Also:
        Constant Field Values

      • optionPane

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

      • minimumSize

        protected Dimension minimumSize
        The size of JOptionPane.

      • 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
        The instance of PropertyChangeListener.

    • Constructor Detail

      • BasicOptionPaneUI

        public BasicOptionPaneUI()

    • Method Detail

      • createUI

        public static ComponentUI createUI​(JComponent x)
        Creates a new BasicOptionPaneUI instance.
        Parameters:
        x - the component
        Returns:
        a new BasicOptionPaneUI instance

      • installDefaults

        protected void installDefaults()
        Installs default properties.

      • uninstallDefaults

        protected void uninstallDefaults()
        Uninstalls default properties.

      • installComponents

        protected void installComponents()
        Registers components.

      • uninstallComponents

        protected void uninstallComponents()
        Unregisters components.

      • createLayoutManager

        protected LayoutManager createLayoutManager()
        Returns a layout manager.
        Returns:
        a layout manager

      • installListeners

        protected void installListeners()
        Registers listeners.

      • uninstallListeners

        protected void uninstallListeners()
        Unregisters listeners.

      • createPropertyChangeListener

        protected PropertyChangeListener createPropertyChangeListener()
        Returns an instance of PropertyChangeListener.
        Returns:
        an instance of PropertyChangeListener

      • installKeyboardActions

        protected void installKeyboardActions()
        Registers keyboard actions.

      • uninstallKeyboardActions

        protected void uninstallKeyboardActions()
        Unregisters keyboard actions.

      • getMinimumOptionPaneSize

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

      • 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
        Returns:
        a Dimension object containing given component's preferred size appropriate for the look and feel
        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.
        Returns:
        a instance of Container

      • 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 msg is an Object[], this method will be recursively invoked for the children. internallyCreated is true if msg is an instance of Component and was created internally by this method (this is used to correctly set hasCustomComponents only if internallyCreated is false).
        Parameters:
        container - a container
        cons - an instance of GridBagConstraints
        msg - a message
        maxll - a maximum length
        internallyCreated - true if the component was internally created

      • getMessage

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

      • addIcon

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

      • 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.
        Returns:
        the icon

      • getIconForType

        protected Icon getIconForType​(int messageType)
        Returns the icon to use for the passed in type.
        Parameters:
        messageType - a type of message
        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.
        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.
        Parameters:
        c - a container
        d - a text
        maxll - a maximum length of a text

      • createSeparator

        protected Container createSeparator()
        Returns a separator.
        Returns:
        a separator

      • createButtonArea

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

      • 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.
        Parameters:
        container - a container
        buttons - an array of buttons
        initialIndex - an initial index

      • createButtonActionListener

        protected ActionListener createButtonActionListener​(int buttonIndex)
        Constructs a new instance of a ButtonActionListener.
        Parameters:
        buttonIndex - an index of the button
        Returns:
        a new instance of a ButtonActionListener

      • 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.
        Returns:
        the buttons to display from the JOptionPane

      • getSizeButtonsToSameWidth

        protected boolean getSizeButtonsToSameWidth()
        Returns true, basic L&F wants all the buttons to have the same width.
        Returns:
        true if all the buttons should 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.
        Returns:
        the initial index into the buttons to select

      • 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
        Parameters:
        op - a JOptionPane

      • 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
        Parameters:
        op - a JOptionPane
        Returns:
        true if the given JOptionPane contains user created Components