javax.swing.plaf.basic

## Class BasicSplitPaneUI

- java.lang.Object
- - javax.swing.plaf.ComponentUI
  - - javax.swing.plaf.SplitPaneUI
    - - javax.swing.plaf.basic.BasicSplitPaneUI

- Direct Known Subclasses:
    MetalSplitPaneUI, SynthSplitPaneUI

      public class BasicSplitPaneUI
      extends SplitPaneUI

  A Basic L&F implementation of the SplitPaneUI.

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `class` | `BasicSplitPaneUI.BasicHorizontalLayoutManager` LayoutManager for JSplitPanes that have an orientation of HORIZONTAL_SPLIT.
    `class` | `BasicSplitPaneUI.BasicVerticalLayoutManager` LayoutManager used for JSplitPanes with an orientation of VERTICAL_SPLIT.
    `class` | `BasicSplitPaneUI.FocusHandler` Implementation of the FocusListener that the JSplitPane UI uses.
    `class` | `BasicSplitPaneUI.KeyboardDownRightHandler` Implementation of an ActionListener that the JSplitPane UI uses for handling specific key presses.
    `class` | `BasicSplitPaneUI.KeyboardEndHandler` Implementation of an ActionListener that the JSplitPane UI uses for handling specific key presses.
    `class` | `BasicSplitPaneUI.KeyboardHomeHandler` Implementation of an ActionListener that the JSplitPane UI uses for handling specific key presses.
    `class` | `BasicSplitPaneUI.KeyboardResizeToggleHandler` Implementation of an ActionListener that the JSplitPane UI uses for handling specific key presses.
    `class` | `BasicSplitPaneUI.KeyboardUpLeftHandler` Implementation of an ActionListener that the JSplitPane UI uses for handling specific key presses.
    `class` | `BasicSplitPaneUI.PropertyHandler` Implementation of the PropertyChangeListener that the JSplitPane UI uses.

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected int` | `beginDragDividerLocation` Location of the divider when the dragging session began.
    `protected BasicSplitPaneDivider` | `divider` Instance of the divider for this JSplitPane.
    `protected KeyStroke` | `dividerResizeToggleKey` Deprecated. As of Java 2 platform v1.3.
    `protected int` | `dividerSize` The size of the divider while the dragging session is valid.
    `protected KeyStroke` | `downKey` Deprecated. As of Java 2 platform v1.3.
    `protected boolean` | `draggingHW` Set to true in startDragging if any of the children (not including the nonContinuousLayoutDivider) are heavy weights.
    `protected KeyStroke` | `endKey` Deprecated. As of Java 2 platform v1.3.
    `protected FocusListener` | `focusListener` Instance of the FocusListener for this JSplitPane.
    `protected KeyStroke` | `homeKey` Deprecated. As of Java 2 platform v1.3.
    `protected static int` | `KEYBOARD_DIVIDER_MOVE_OFFSET` How far (relative) the divider does move when it is moved around by the cursor keys on the keyboard.
    `protected ActionListener` | `keyboardDownRightListener` Deprecated. As of Java 2 platform v1.3.
    `protected ActionListener` | `keyboardEndListener` Deprecated. As of Java 2 platform v1.3.
    `protected ActionListener` | `keyboardHomeListener` Deprecated. As of Java 2 platform v1.3.
    `protected ActionListener` | `keyboardResizeToggleListener` Deprecated. As of Java 2 platform v1.3.
    `protected ActionListener` | `keyboardUpLeftListener` Deprecated. As of Java 2 platform v1.3.
    `protected BasicSplitPaneUI.BasicHorizontalLayoutManager` | `layoutManager` LayoutManager that is created and placed into the split pane.
    `protected KeyStroke` | `leftKey` Deprecated. As of Java 2 platform v1.3.
    `protected static String` | `NON_CONTINUOUS_DIVIDER` The divider used for non-continuous layout is added to the split pane with this object.
    `protected Component` | `nonContinuousLayoutDivider` Instance for the shadow of the divider when non continuous layout is being used.
    `protected PropertyChangeListener` | `propertyChangeListener` Instance of the PropertyChangeListener for this JSplitPane.
    `protected KeyStroke` | `rightKey` Deprecated. As of Java 2 platform v1.3.
    `protected JSplitPane` | `splitPane` JSplitPane instance this instance is providing the look and feel for.
    `protected KeyStroke` | `upKey` Deprecated. As of Java 2 platform v1.3.

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `BasicSplitPaneUI()`

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
    Modifier and Type | Method and Description
    --- | ---
    `BasicSplitPaneDivider` | `createDefaultDivider()` Creates the default divider.
    `protected Component` | `createDefaultNonContinuousLayoutDivider()` Returns the default non continuous layout divider, which is an instance of `Canvas` that fills in the background with dark gray.
    `protected FocusListener` | `createFocusListener()` Creates a FocusListener for the JSplitPane UI.
    `protected ActionListener` | `createKeyboardDownRightListener()` Deprecated. As of Java 2 platform v1.3.
    `protected ActionListener` | `createKeyboardEndListener()` Deprecated. As of Java 2 platform v1.3.
    `protected ActionListener` | `createKeyboardHomeListener()` Deprecated. As of Java 2 platform v1.3.
    `protected ActionListener` | `createKeyboardResizeToggleListener()` Deprecated. As of Java 2 platform v1.3.
    `protected ActionListener` | `createKeyboardUpLeftListener()` Deprecated. As of Java 2 platform v1.3.
    `protected PropertyChangeListener` | `createPropertyChangeListener()` Creates a PropertyChangeListener for the JSplitPane UI.
    `static ComponentUI` | `createUI(JComponent x)` Creates a new BasicSplitPaneUI instance
    `protected void` | `dragDividerTo(int location)` Messaged during a dragging session to move the divider to the passed in location.
    `protected void` | `finishDraggingTo(int location)` Messaged to finish the dragging session.
    `void` | `finishedPaintingChildren(JSplitPane sp, Graphics g)` Called when the specified split pane has finished painting its children.
    `BasicSplitPaneDivider` | `getDivider()` Returns the divider between the top Components.
    `protected int` | `getDividerBorderSize()` Deprecated. As of Java 2 platform v1.3, instead set the border on the divider.
    `int` | `getDividerLocation(JSplitPane jc)` Returns the location of the divider, which may differ from what the splitpane thinks the location of the divider is.
    `Insets` | `getInsets(JComponent jc)` Returns the insets.
    `int` | `getLastDragLocation()` Returns the last drag location of the JSplitPane.
    `int` | `getMaximumDividerLocation(JSplitPane jc)` Gets the maximum location of the divider.
    `Dimension` | `getMaximumSize(JComponent jc)` Returns the maximum size for the passed in component, This is passed off to the current layout manager.
    `int` | `getMinimumDividerLocation(JSplitPane jc)` Gets the minimum location of the divider.
    `Dimension` | `getMinimumSize(JComponent jc)` Returns the minimum size for the passed in component, This is passed off to the current layout manager.
    `Component` | `getNonContinuousLayoutDivider()` Returns the divider to use when the splitPane is configured to not continuously layout.
    `int` | `getOrientation()` Returns the orientation for the JSplitPane.
    `Dimension` | `getPreferredSize(JComponent jc)` Returns the preferred size for the passed in component, This is passed off to the current layout manager.
    `JSplitPane` | `getSplitPane()` Returns the splitpane this instance is currently contained in.
    `protected void` | `installDefaults()` Installs the UI defaults.
    `protected void` | `installKeyboardActions()` Installs the keyboard actions for the UI.
    `protected void` | `installListeners()` Installs the event listeners for the UI.
    `void` | `installUI(JComponent c)` Installs the UI.
    `boolean` | `isContinuousLayout()` Determines whether the JSplitPane is set to use a continuous layout.
    `void` | `paint(Graphics g, JComponent jc)` Paints the specified component appropriately for the look and feel.
    `protected void` | `resetLayoutManager()` Resets the layout manager based on orientation and messages it with invalidateLayout to pull in appropriate Components.
    `void` | `resetToPreferredSizes(JSplitPane jc)` Messaged to reset the preferred sizes.
    `void` | `setContinuousLayout(boolean b)` Turn continuous layout on/off.
    `void` | `setDividerLocation(JSplitPane jc, int location)` Sets the location of the divider to location.
    `void` | `setLastDragLocation(int l)` Set the last drag location of the JSplitPane.
    `protected void` | `setNonContinuousLayoutDivider(Component newDivider)` Sets the divider to use when the splitPane is configured to not continuously layout.
    `protected void` | `setNonContinuousLayoutDivider(Component newDivider, boolean rememberSizes)` Sets the divider to use.
    `void` | `setOrientation(int orientation)` Set the orientation for the JSplitPane.
    `protected void` | `startDragging()` Should be messaged before the dragging session starts, resets lastDragLocation and dividerSize.
    `protected void` | `uninstallDefaults()` Uninstalls the UI defaults.
    `protected void` | `uninstallKeyboardActions()` Uninstalls the keyboard actions for the UI.
    `protected void` | `uninstallListeners()` Uninstalls the event listeners for the UI.
    `void` | `uninstallUI(JComponent c)` Uninstalls the UI.

    - ### Methods inherited from class javax.swing.plaf.ComponentUI

      `contains, getAccessibleChild, getAccessibleChildrenCount, getBaseline, getBaselineResizeBehavior, update`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### NON_CONTINUOUS_DIVIDER

          protected static final String NON_CONTINUOUS_DIVIDER

      The divider used for non-continuous layout is added to the split pane with this object.
      See Also:
        Constant Field Values

    - #### KEYBOARD_DIVIDER_MOVE_OFFSET

          protected static int KEYBOARD_DIVIDER_MOVE_OFFSET

      How far (relative) the divider does move when it is moved around by the cursor keys on the keyboard.

    - #### splitPane

          protected JSplitPane splitPane

      JSplitPane instance this instance is providing the look and feel for.

    - #### layoutManager

          protected BasicSplitPaneUI.BasicHorizontalLayoutManager layoutManager

      LayoutManager that is created and placed into the split pane.

    - #### divider

          protected BasicSplitPaneDivider divider

      Instance of the divider for this JSplitPane.

    - #### propertyChangeListener

          protected PropertyChangeListener propertyChangeListener

      Instance of the PropertyChangeListener for this JSplitPane.

    - #### focusListener

          protected FocusListener focusListener

      Instance of the FocusListener for this JSplitPane.

    - #### dividerSize

          protected int dividerSize

      The size of the divider while the dragging session is valid.

    - #### nonContinuousLayoutDivider

          protected Component nonContinuousLayoutDivider

      Instance for the shadow of the divider when non continuous layout is being used.

    - #### draggingHW

          protected boolean draggingHW

      Set to true in startDragging if any of the children (not including the nonContinuousLayoutDivider) are heavy weights.

    - #### beginDragDividerLocation

          protected int beginDragDividerLocation

      Location of the divider when the dragging session began.

    - #### upKey

          @Deprecated
          protected KeyStroke upKey

      Deprecated. As of Java 2 platform v1.3.
      As of Java 2 platform v1.3 this previously undocumented field is no longer used. Key bindings are now defined by the LookAndFeel, please refer to the key bindings specification for further details.

    - #### downKey

          @Deprecated
          protected KeyStroke downKey

      Deprecated. As of Java 2 platform v1.3.
      As of Java 2 platform v1.3 this previously undocumented field is no longer used. Key bindings are now defined by the LookAndFeel, please refer to the key bindings specification for further details.

    - #### leftKey

          @Deprecated
          protected KeyStroke leftKey

      Deprecated. As of Java 2 platform v1.3.
      As of Java 2 platform v1.3 this previously undocumented field is no longer used. Key bindings are now defined by the LookAndFeel, please refer to the key bindings specification for further details.

    - #### rightKey

          @Deprecated
          protected KeyStroke rightKey

      Deprecated. As of Java 2 platform v1.3.
      As of Java 2 platform v1.3 this previously undocumented field is no longer used. Key bindings are now defined by the LookAndFeel, please refer to the key bindings specification for further details.

    - #### homeKey

          @Deprecated
          protected KeyStroke homeKey

      Deprecated. As of Java 2 platform v1.3.
      As of Java 2 platform v1.3 this previously undocumented field is no longer used. Key bindings are now defined by the LookAndFeel, please refer to the key bindings specification for further details.

    - #### endKey

          @Deprecated
          protected KeyStroke endKey

      Deprecated. As of Java 2 platform v1.3.
      As of Java 2 platform v1.3 this previously undocumented field is no longer used. Key bindings are now defined by the LookAndFeel, please refer to the key bindings specification for further details.

    - #### dividerResizeToggleKey

          @Deprecated
          protected KeyStroke dividerResizeToggleKey

      Deprecated. As of Java 2 platform v1.3.
      As of Java 2 platform v1.3 this previously undocumented field is no longer used. Key bindings are now defined by the LookAndFeel, please refer to the key bindings specification for further details.

    - #### keyboardUpLeftListener

          @Deprecated
          protected ActionListener keyboardUpLeftListener

      Deprecated. As of Java 2 platform v1.3.
      As of Java 2 platform v1.3 this previously undocumented field is no longer used. Key bindings are now defined by the LookAndFeel, please refer to the key bindings specification for further details.

    - #### keyboardDownRightListener

          @Deprecated
          protected ActionListener keyboardDownRightListener

      Deprecated. As of Java 2 platform v1.3.
      As of Java 2 platform v1.3 this previously undocumented field is no longer used. Key bindings are now defined by the LookAndFeel, please refer to the key bindings specification for further details.

    - #### keyboardHomeListener

          @Deprecated
          protected ActionListener keyboardHomeListener

      Deprecated. As of Java 2 platform v1.3.
      As of Java 2 platform v1.3 this previously undocumented field is no longer used. Key bindings are now defined by the LookAndFeel, please refer to the key bindings specification for further details.

    - #### keyboardEndListener

          @Deprecated
          protected ActionListener keyboardEndListener

      Deprecated. As of Java 2 platform v1.3.
      As of Java 2 platform v1.3 this previously undocumented field is no longer used. Key bindings are now defined by the LookAndFeel, please refer to the key bindings specification for further details.

    - #### keyboardResizeToggleListener

          @Deprecated
          protected ActionListener keyboardResizeToggleListener

      Deprecated. As of Java 2 platform v1.3.
      As of Java 2 platform v1.3 this previously undocumented field is no longer used. Key bindings are now defined by the LookAndFeel, please refer to the key bindings specification for further details.

  - ### Constructor Detail

    - #### BasicSplitPaneUI

          public BasicSplitPaneUI()

  - ### Method Detail

    - #### createUI

          public static ComponentUI createUI(JComponent x)

      Creates a new BasicSplitPaneUI instance

    - #### installUI

          public void installUI(JComponent c)

      Installs the UI.
      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()`

    - #### installDefaults

          protected void installDefaults()

      Installs the UI defaults.

    - #### installListeners

          protected void installListeners()

      Installs the event listeners for the UI.

    - #### installKeyboardActions

          protected void installKeyboardActions()

      Installs the keyboard actions for the UI.

    - #### uninstallUI

          public void uninstallUI(JComponent c)

      Uninstalls the UI.
      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()`

    - #### uninstallDefaults

          protected void uninstallDefaults()

      Uninstalls the UI defaults.

    - #### uninstallListeners

          protected void uninstallListeners()

      Uninstalls the event listeners for the UI.

    - #### uninstallKeyboardActions

          protected void uninstallKeyboardActions()

      Uninstalls the keyboard actions for the UI.

    - #### createPropertyChangeListener

          protected PropertyChangeListener createPropertyChangeListener()

      Creates a PropertyChangeListener for the JSplitPane UI.

    - #### createFocusListener

          protected FocusListener createFocusListener()

      Creates a FocusListener for the JSplitPane UI.

    - #### createKeyboardUpLeftListener

          @Deprecated
          protected ActionListener createKeyboardUpLeftListener()

      Deprecated. As of Java 2 platform v1.3.
      As of Java 2 platform v1.3 this method is no longer used. Subclassers previously using this method should instead create an Action wrapping the ActionListener, and register that Action by overriding `installKeyboardActions` and placing the Action in the SplitPane's ActionMap. Please refer to the key bindings specification for further details.

      Creates a ActionListener for the JSplitPane UI that listens for specific key presses.

    - #### createKeyboardDownRightListener

          @Deprecated
          protected ActionListener createKeyboardDownRightListener()

      Deprecated. As of Java 2 platform v1.3.
      As of Java 2 platform v1.3 this method is no longer used. Subclassers previously using this method should instead create an Action wrapping the ActionListener, and register that Action by overriding `installKeyboardActions` and placing the Action in the SplitPane's ActionMap. Please refer to the key bindings specification for further details.

      Creates a ActionListener for the JSplitPane UI that listens for specific key presses.

    - #### createKeyboardHomeListener

          @Deprecated
          protected ActionListener createKeyboardHomeListener()

      Deprecated. As of Java 2 platform v1.3.
      As of Java 2 platform v1.3 this method is no longer used. Subclassers previously using this method should instead create an Action wrapping the ActionListener, and register that Action by overriding `installKeyboardActions` and placing the Action in the SplitPane's ActionMap. Please refer to the key bindings specification for further details.

      Creates a ActionListener for the JSplitPane UI that listens for specific key presses.

    - #### createKeyboardEndListener

          @Deprecated
          protected ActionListener createKeyboardEndListener()

      Deprecated. As of Java 2 platform v1.3.
      As of Java 2 platform v1.3 this method is no longer used. Subclassers previously using this method should instead create an Action wrapping the ActionListener, and register that Action by overriding `installKeyboardActions` and placing the Action in the SplitPane's ActionMap. Please refer to the key bindings specification for further details.

      Creates a ActionListener for the JSplitPane UI that listens for specific key presses.

    - #### createKeyboardResizeToggleListener

          @Deprecated
          protected ActionListener createKeyboardResizeToggleListener()

      Deprecated. As of Java 2 platform v1.3.
      As of Java 2 platform v1.3 this method is no longer used. Subclassers previously using this method should instead create an Action wrapping the ActionListener, and register that Action by overriding `installKeyboardActions` and placing the Action in the SplitPane's ActionMap. Please refer to the key bindings specification for further details.

      Creates a ActionListener for the JSplitPane UI that listens for specific key presses.

    - #### getOrientation

          public int getOrientation()

      Returns the orientation for the JSplitPane.

    - #### setOrientation

          public void setOrientation(int orientation)

      Set the orientation for the JSplitPane.

    - #### isContinuousLayout

          public boolean isContinuousLayout()

      Determines whether the JSplitPane is set to use a continuous layout.

    - #### setContinuousLayout

          public void setContinuousLayout(boolean b)

      Turn continuous layout on/off.

    - #### getLastDragLocation

          public int getLastDragLocation()

      Returns the last drag location of the JSplitPane.

    - #### setLastDragLocation

          public void setLastDragLocation(int l)

      Set the last drag location of the JSplitPane.

    - #### getDivider

          public BasicSplitPaneDivider getDivider()

      Returns the divider between the top Components.

    - #### createDefaultNonContinuousLayoutDivider

          protected Component createDefaultNonContinuousLayoutDivider()

      Returns the default non continuous layout divider, which is an instance of `Canvas` that fills in the background with dark gray.

    - #### setNonContinuousLayoutDivider

          protected void setNonContinuousLayoutDivider(Component newDivider)

      Sets the divider to use when the splitPane is configured to not continuously layout. This divider will only be used during a dragging session. It is recommended that the passed in component be a heavy weight.

    - #### setNonContinuousLayoutDivider

          protected void setNonContinuousLayoutDivider(Component newDivider,
                                                       boolean rememberSizes)

      Sets the divider to use.

    - #### getNonContinuousLayoutDivider

          public Component getNonContinuousLayoutDivider()

      Returns the divider to use when the splitPane is configured to not continuously layout. This divider will only be used during a dragging session.

    - #### getSplitPane

          public JSplitPane getSplitPane()

      Returns the splitpane this instance is currently contained in.

    - #### createDefaultDivider

          public BasicSplitPaneDivider createDefaultDivider()

      Creates the default divider.

    - #### resetToPreferredSizes

          public void resetToPreferredSizes(JSplitPane jc)

      Messaged to reset the preferred sizes.
      Specified by:
        `resetToPreferredSizes` in class `SplitPaneUI`

    - #### setDividerLocation

          public void setDividerLocation(JSplitPane jc,
                                         int location)

      Sets the location of the divider to location.
      Specified by:
        `setDividerLocation` in class `SplitPaneUI`

    - #### getDividerLocation

          public int getDividerLocation(JSplitPane jc)

      Returns the location of the divider, which may differ from what the splitpane thinks the location of the divider is.
      Specified by:
        `getDividerLocation` in class `SplitPaneUI`

    - #### getMinimumDividerLocation

          public int getMinimumDividerLocation(JSplitPane jc)

      Gets the minimum location of the divider.
      Specified by:
        `getMinimumDividerLocation` in class `SplitPaneUI`

    - #### getMaximumDividerLocation

          public int getMaximumDividerLocation(JSplitPane jc)

      Gets the maximum location of the divider.
      Specified by:
        `getMaximumDividerLocation` in class `SplitPaneUI`

    - #### finishedPaintingChildren

          public void finishedPaintingChildren(JSplitPane sp,
                                               Graphics g)

      Called when the specified split pane has finished painting its children.
      Specified by:
        `finishedPaintingChildren` in class `SplitPaneUI`

    - #### paint

          public void paint(Graphics g,
                            JComponent jc)

      Paints the specified component appropriately 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.
      Overrides:
        `paint` in class `ComponentUI`
      Parameters:
        `g` - the `Graphics` context in which to paint
        `jc` - the component being painted; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
      See Also:
        `ComponentUI.update(java.awt.Graphics, javax.swing.JComponent)`

    - #### getPreferredSize

          public Dimension getPreferredSize(JComponent jc)

      Returns the preferred size for the passed in component, This is passed off to the current layout manager.
      Overrides:
        `getPreferredSize` in class `ComponentUI`
      Parameters:
        `jc` - 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)`

    - #### getMinimumSize

          public Dimension getMinimumSize(JComponent jc)

      Returns the minimum size for the passed in component, This is passed off to the current layout manager.
      Overrides:
        `getMinimumSize` in class `ComponentUI`
      Parameters:
        `jc` - 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)`

    - #### getMaximumSize

          public Dimension getMaximumSize(JComponent jc)

      Returns the maximum size for the passed in component, This is passed off to the current layout manager.
      Overrides:
        `getMaximumSize` in class `ComponentUI`
      Parameters:
        `jc` - 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)`

    - #### getInsets

          public Insets getInsets(JComponent jc)

      Returns the insets. The insets are returned from the border insets of the current border.

    - #### resetLayoutManager

          protected void resetLayoutManager()

      Resets the layout manager based on orientation and messages it with invalidateLayout to pull in appropriate Components.

    - #### startDragging

          protected void startDragging()

      Should be messaged before the dragging session starts, resets lastDragLocation and dividerSize.

    - #### dragDividerTo

          protected void dragDividerTo(int location)

      Messaged during a dragging session to move the divider to the passed in location. If continuousLayout is true the location is reset and the splitPane validated.

    - #### finishDraggingTo

          protected void finishDraggingTo(int location)

      Messaged to finish the dragging session. If not continuous display the dividers location will be reset.

    - #### getDividerBorderSize

          @Deprecated
          protected int getDividerBorderSize()

      Deprecated. As of Java 2 platform v1.3, instead set the border on the divider.
      As of Java 2 platform v1.3 this method is no longer used. Instead you should set the border on the divider.

      Returns the width of one side of the divider border.

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