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## javax.swing.plaf.basic
Class BasicSplitPaneDivider

    java.lang.Object
      java.awt.Component
          java.awt.Container
              javax.swing.plaf.basic.BasicSplitPaneDivider

All Implemented Interfaces:
  ImageObserver, MenuContainer, PropertyChangeListener, Serializable, EventListener

    public class BasicSplitPaneDivider

extends Container
implements PropertyChangeListener

Divider used by BasicSplitPaneUI. Subclassers may wish to override paint to do something more interesting. The border effect is drawn in BasicSplitPaneUI, so if you don't like that border, reset it there. To conditionally drag from certain areas subclass mousePressed and call super when you wish the dragging to begin.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeansTM has been added to the `java.beans` package. Please see `XMLEncoder`.

Nested Class Summary
`protected class` | `BasicSplitPaneDivider.DividerLayout` Used to layout a `BasicSplitPaneDivider`.
`protected class` | `BasicSplitPaneDivider.DragController` Handles the events during a dragging session for a HORIZONTAL_SPLIT oriented split pane.
`protected class` | `BasicSplitPaneDivider.MouseHandler` MouseHandler is responsible for converting mouse events (released, dragged...) into the appropriate DragController methods.
`protected class` | `BasicSplitPaneDivider.VerticalDragController` Handles the events during a dragging session for a VERTICAL_SPLIT oriented split pane.

Nested classes/interfaces inherited from class java.awt.Container
`Container.AccessibleAWTContainer`

Nested classes/interfaces inherited from class java.awt.Component
`Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy`

Field Summary
`protected int` | `dividerSize` Size of the divider.
`protected BasicSplitPaneDivider.DragController` | `dragger` Handles mouse dragging message to do the actual dragging.
`protected Component` | `hiddenDivider` Divider that is used for noncontinuous layout mode.
`protected JButton` | `leftButton` Button for quickly toggling the left component.
`protected BasicSplitPaneDivider.MouseHandler` | `mouseHandler` Handles mouse events from both this class, and the split pane.
`protected static int` | `ONE_TOUCH_OFFSET`
`protected static int` | `ONE_TOUCH_SIZE` Width or height of the divider based on orientation BasicSplitPaneUI adds two to this.
`protected int` | `orientation` Orientation of the JSplitPane.
`protected JButton` | `rightButton` Button for quickly toggling the right component.
`protected JSplitPane` | `splitPane` JSplitPane the receiver is contained in.
`protected BasicSplitPaneUI` | `splitPaneUI` UI this instance was created from.

Fields inherited from class java.awt.Component
`BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT`

Fields inherited from interface java.awt.image.ImageObserver
`ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH`

Constructor Summary
`BasicSplitPaneDivider(BasicSplitPaneUI ui)` Creates an instance of BasicSplitPaneDivider.

Method Summary
`protected JButton` | `createLeftOneTouchButton()` Creates and return an instance of JButton that can be used to collapse the left component in the split pane.
`protected JButton` | `createRightOneTouchButton()` Creates and return an instance of JButton that can be used to collapse the right component in the split pane.
`protected void` | `dragDividerTo(int location)` Messages the BasicSplitPaneUI with dragDividerTo that this instance is contained in.
`protected void` | `finishDraggingTo(int location)` Messages the BasicSplitPaneUI with finishDraggingTo that this instance is contained in.
`BasicSplitPaneUI` | `getBasicSplitPaneUI()` Returns the `SplitPaneUI` the receiver is currently in.
`Border` | `getBorder()` Returns the border of this component or null if no border is currently set.
`int` | `getDividerSize()` Returns the size of the divider, that is the width if the splitpane is HORIZONTAL_SPLIT, or the height of VERTICAL_SPLIT.
`Insets` | `getInsets()` If a border has been set on this component, returns the border's insets, else calls super.getInsets.
`Dimension` | `getMinimumSize()` Returns dividerSize x dividerSize
`Dimension` | `getPreferredSize()` Returns dividerSize x dividerSize
`boolean` | `isMouseOver()` Returns whether or not the mouse is currently over the divider
`protected void` | `oneTouchExpandableChanged()` Messaged when the oneTouchExpandable value of the JSplitPane the receiver is contained in changes.
`void` | `paint(Graphics g)` Paints the divider.
`protected void` | `prepareForDragging()` Message to prepare for dragging.
`void` | `propertyChange(PropertyChangeEvent e)` Property change event, presumably from the JSplitPane, will message updateOrientation if necessary.
`void` | `setBasicSplitPaneUI(BasicSplitPaneUI newUI)` Sets the SplitPaneUI that is using the receiver.
`void` | `setBorder(Border border)` Sets the border of this component.
`void` | `setDividerSize(int newSize)` Sets the size of the divider to `newSize`.
`protected void` | `setMouseOver(boolean mouseOver)` Sets whether or not the mouse is currently over the divider.

Methods inherited from class java.awt.Container
`add, add, add, add, add, addContainerListener, addImpl, addNotify, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getListeners, getMaximumSize, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, paramString, preferredSize, print, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, removeNotify, setComponentZOrder, setFocusCycleRoot, setFocusTraversalKeys, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setFont, setLayout, transferFocusBackward, transferFocusDownCycle, update, validate, validateTree`

Methods inherited from class java.awt.Component
`action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, contains, createImage, createImage, createVolatileImage, createVolatileImage, disable, disableEvents, dispatchEvent, enable, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getAccessibleContext, getBackground, getBaseline, getBaselineResizeBehavior, getBounds, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isDoubleBuffered, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, printAll, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, reshape, resize, resize, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeysEnabled, setForeground, setIgnoreRepaint, setLocale, setLocation, setLocation, setMaximumSize, setMinimumSize, setName, setPreferredSize, setSize, setSize, setVisible, show, show, size, toString, transferFocus, transferFocusUpCycle`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Field Detail

### ONE_TOUCH_SIZE

    protected static final int ONE_TOUCH_SIZE

  Width or height of the divider based on orientation BasicSplitPaneUI adds two to this.

  See Also:
    Constant Field Values

### ONE_TOUCH_OFFSET

    protected static final int ONE_TOUCH_OFFSET

See Also:
  Constant Field Values

### dragger

    protected BasicSplitPaneDivider.DragController dragger

  Handles mouse dragging message to do the actual dragging.

### splitPaneUI

    protected BasicSplitPaneUI splitPaneUI

  UI this instance was created from.

### dividerSize

    protected int dividerSize

  Size of the divider.

### hiddenDivider

    protected Component hiddenDivider

  Divider that is used for noncontinuous layout mode.

### splitPane

    protected JSplitPane splitPane

  JSplitPane the receiver is contained in.

### mouseHandler

    protected BasicSplitPaneDivider.MouseHandler mouseHandler

  Handles mouse events from both this class, and the split pane. Mouse events are handled for the splitpane since you want to be able to drag when clicking on the border of the divider, which is not drawn by the divider.

### orientation

    protected int orientation

  Orientation of the JSplitPane.

### leftButton

    protected JButton leftButton

  Button for quickly toggling the left component.

### rightButton

    protected JButton rightButton

  Button for quickly toggling the right component.

Constructor Detail

### BasicSplitPaneDivider

    public BasicSplitPaneDivider(BasicSplitPaneUI ui)

  Creates an instance of BasicSplitPaneDivider. Registers this instance for mouse events and mouse dragged events.

Method Detail

### setBasicSplitPaneUI

    public void setBasicSplitPaneUI(BasicSplitPaneUI newUI)

  Sets the SplitPaneUI that is using the receiver.

### getBasicSplitPaneUI

    public BasicSplitPaneUI getBasicSplitPaneUI()

  Returns the `SplitPaneUI` the receiver is currently in.

### setDividerSize

    public void setDividerSize(int newSize)

  Sets the size of the divider to `newSize`. That is the width if the splitpane is `HORIZONTAL_SPLIT`, or the height of `VERTICAL_SPLIT`.

### getDividerSize

    public int getDividerSize()

  Returns the size of the divider, that is the width if the splitpane is HORIZONTAL_SPLIT, or the height of VERTICAL_SPLIT.

### setBorder

    public void setBorder(Border border)

  Sets the border of this component.

  Since:
    1.3

### getBorder

    public Border getBorder()

  Returns the border of this component or null if no border is currently set.

  Returns:
    the border object for this component
  Since:
    1.3
  See Also:
    `setBorder(javax.swing.border.Border)`

### getInsets

    public Insets getInsets()

  If a border has been set on this component, returns the border's insets, else calls super.getInsets.

  Overrides:
    `getInsets` in class `Container`
  Returns:
    the value of the insets property.
  See Also:
    `setBorder(javax.swing.border.Border)`

### setMouseOver

    protected void setMouseOver(boolean mouseOver)

  Sets whether or not the mouse is currently over the divider.

  Parameters:
    `mouseOver` - whether or not the mouse is currently over the divider
  Since:
    1.5

### isMouseOver

    public boolean isMouseOver()

  Returns whether or not the mouse is currently over the divider

  Returns:
    whether or not the mouse is currently over the divider
  Since:
    1.5

### getPreferredSize

    public Dimension getPreferredSize()

  Returns dividerSize x dividerSize

  Overrides:
    `getPreferredSize` in class `Container`
  Returns:
    an instance of `Dimension` that represents the preferred size of this container.
  See Also:
    `Container.getMinimumSize()`, `Container.getMaximumSize()`, `Container.getLayout()`, `LayoutManager.preferredLayoutSize(Container)`, `Component.getPreferredSize()`

### getMinimumSize

    public Dimension getMinimumSize()

  Returns dividerSize x dividerSize

  Overrides:
    `getMinimumSize` in class `Container`
  Returns:
    an instance of `Dimension` that represents the minimum size of this container.
  See Also:
    `Container.getPreferredSize()`, `Container.getMaximumSize()`, `Container.getLayout()`, `LayoutManager.minimumLayoutSize(Container)`, `Component.getMinimumSize()`

### propertyChange

    public void propertyChange(PropertyChangeEvent e)

  Property change event, presumably from the JSplitPane, will message updateOrientation if necessary.

  Specified by:
    `propertyChange` in interface `PropertyChangeListener`
  Parameters:
    `e` - A PropertyChangeEvent object describing the event source and the property that has changed.

### paint

    public void paint(Graphics g)

  Paints the divider.

  Overrides:
    `paint` in class `Container`
  Parameters:
    `g` - the specified Graphics window
  See Also:
    `Component.update(Graphics)`

### oneTouchExpandableChanged

    protected void oneTouchExpandableChanged()

  Messaged when the oneTouchExpandable value of the JSplitPane the receiver is contained in changes. Will create the `leftButton` and `rightButton` if they are null. invalidates the receiver as well.

### createLeftOneTouchButton

    protected JButton createLeftOneTouchButton()

  Creates and return an instance of JButton that can be used to collapse the left component in the split pane.

### createRightOneTouchButton

    protected JButton createRightOneTouchButton()

  Creates and return an instance of JButton that can be used to collapse the right component in the split pane.

### prepareForDragging

    protected void prepareForDragging()

  Message to prepare for dragging. This messages the BasicSplitPaneUI with startDragging.

### dragDividerTo

    protected void dragDividerTo(int location)

  Messages the BasicSplitPaneUI with dragDividerTo that this instance is contained in.

### finishDraggingTo

    protected void finishDraggingTo(int location)

  Messages the BasicSplitPaneUI with finishDraggingTo that this instance is contained in.

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