* 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 {@link java.beans.XMLEncoder}.
*
* @author Scott Violet
*/
public class BasicSplitPaneDivider extends Container
implements PropertyChangeListener
{
/**
* Width or height of the divider based on orientation
* BasicSplitPaneUI adds two to this.
*/
protected static final int ONE_TOUCH_SIZE = 6;
protected static final int ONE_TOUCH_OFFSET = 2;
/**
* Handles mouse dragging message to do the actual dragging.
*/
protected DragController dragger;
/**
* UI this instance was created from.
*/
protected BasicSplitPaneUI splitPaneUI;
/**
* Size of the divider.
*/
protected int dividerSize = 0; // default - SET TO 0???
/**
* Divider that is used for noncontinuous layout mode.
*/
protected Component hiddenDivider;
/**
* JSplitPane the receiver is contained in.
*/
protected JSplitPane splitPane;
/**
* 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.
*/
protected MouseHandler mouseHandler;
/**
* Orientation of the JSplitPane.
*/
protected int orientation;
/**
* Button for quickly toggling the left component.
*/
protected JButton leftButton;
/**
* Button for quickly toggling the right component.
*/
protected JButton rightButton;
/** Border. */
private Border border;
/**
* Is the mouse over the divider?
*/
private boolean mouseOver;
private int oneTouchSize;
private int oneTouchOffset;
/**
* If true the one touch buttons are centered on the divider.
*/
private boolean centerOneTouchButtons;
/**
* Creates an instance of BasicSplitPaneDivider. Registers this
* instance for mouse events and mouse dragged events.
*/
public BasicSplitPaneDivider(BasicSplitPaneUI ui) {
oneTouchSize = DefaultLookup.getInt(ui.getSplitPane(), ui,
"SplitPane.oneTouchButtonSize", ONE_TOUCH_SIZE);
oneTouchOffset = DefaultLookup.getInt(ui.getSplitPane(), ui,
"SplitPane.oneTouchButtonOffset", ONE_TOUCH_OFFSET);
centerOneTouchButtons = DefaultLookup.getBoolean(ui.getSplitPane(),
ui, "SplitPane.centerOneTouchButtons", true);
setLayout(new DividerLayout());
setBasicSplitPaneUI(ui);
orientation = splitPane.getOrientation();
setCursor((orientation == JSplitPane.HORIZONTAL_SPLIT) ?
Cursor.getPredefinedCursor(Cursor.E_RESIZE_CURSOR) :
Cursor.getPredefinedCursor(Cursor.S_RESIZE_CURSOR));
setBackground(UIManager.getColor("SplitPane.background"));
}
private void revalidateSplitPane() {
invalidate();
if (splitPane != null) {
splitPane.revalidate();
}
}
/**
* Sets the SplitPaneUI that is using the receiver.
*/
public void setBasicSplitPaneUI(BasicSplitPaneUI newUI) {
if (splitPane != null) {
splitPane.removePropertyChangeListener(this);
if (mouseHandler != null) {
splitPane.removeMouseListener(mouseHandler);
splitPane.removeMouseMotionListener(mouseHandler);
removeMouseListener(mouseHandler);
removeMouseMotionListener(mouseHandler);
mouseHandler = null;
}
}
splitPaneUI = newUI;
if (newUI != null) {
splitPane = newUI.getSplitPane();
if (splitPane != null) {
if (mouseHandler == null) mouseHandler = new MouseHandler();
splitPane.addMouseListener(mouseHandler);
splitPane.addMouseMotionListener(mouseHandler);
addMouseListener(mouseHandler);
addMouseMotionListener(mouseHandler);
splitPane.addPropertyChangeListener(this);
if (splitPane.isOneTouchExpandable()) {
oneTouchExpandableChanged();
}
}
}
else {
splitPane = null;
}
}
/**
* Returns the SplitPaneUI the receiver is currently
* in.
*/
public BasicSplitPaneUI getBasicSplitPaneUI() {
return splitPaneUI;
}
/**
* Sets the size of the divider to newSize. That is
* the width if the splitpane is HORIZONTAL_SPLIT, or
* the height of VERTICAL_SPLIT.
*/
public void setDividerSize(int newSize) {
dividerSize = newSize;
}
/**
* Returns the size of the divider, that is the width if the splitpane
* is HORIZONTAL_SPLIT, or the height of VERTICAL_SPLIT.
*/
public int getDividerSize() {
return dividerSize;
}
/**
* Sets the border of this component.
* @since 1.3
*/
public void setBorder(Border border) {
Border oldBorder = this.border;
this.border = border;
}
/**
* Returns the border of this component or null if no border is
* currently set.
*
* @return the border object for this component
* @see #setBorder
* @since 1.3
*/
public Border getBorder() {
return border;
}
/**
* If a border has been set on this component, returns the
* border's insets, else calls super.getInsets.
*
* @return the value of the insets property.
* @see #setBorder
*/
public Insets getInsets() {
Border border = getBorder();
if (border != null) {
return border.getBorderInsets(this);
}
return super.getInsets();
}
/**
* Sets whether or not the mouse is currently over the divider.
*
* @param mouseOver whether or not the mouse is currently over the divider
* @since 1.5
*/
protected void setMouseOver(boolean mouseOver) {
this.mouseOver = mouseOver;
}
/**
* Returns whether or not the mouse is currently over the divider
*
* @return whether or not the mouse is currently over the divider
* @since 1.5
*/
public boolean isMouseOver() {
return mouseOver;
}
/**
* Returns dividerSize x dividerSize
*/
public Dimension getPreferredSize() {
// Ideally this would return the size from the layout manager,
// but that could result in the layed out size being different from
// the dividerSize, which may break developers as well as
// BasicSplitPaneUI.
if (orientation == JSplitPane.HORIZONTAL_SPLIT) {
return new Dimension(getDividerSize(), 1);
}
return new Dimension(1, getDividerSize());
}
/**
* Returns dividerSize x dividerSize
*/
public Dimension getMinimumSize() {
return getPreferredSize();
}
/**
* Property change event, presumably from the JSplitPane, will message
* updateOrientation if necessary.
*/
public void propertyChange(PropertyChangeEvent e) {
if (e.getSource() == splitPane) {
if (e.getPropertyName() == JSplitPane.ORIENTATION_PROPERTY) {
orientation = splitPane.getOrientation();
setCursor((orientation == JSplitPane.HORIZONTAL_SPLIT) ?
Cursor.getPredefinedCursor(Cursor.E_RESIZE_CURSOR) :
Cursor.getPredefinedCursor(Cursor.S_RESIZE_CURSOR));
revalidateSplitPane();
}
else if (e.getPropertyName() == JSplitPane.
ONE_TOUCH_EXPANDABLE_PROPERTY) {
oneTouchExpandableChanged();
}
}
}
/**
* Paints the divider.
*/
public void paint(Graphics g) {
super.paint(g);
// Paint the border.
Border border = getBorder();
if (border != null) {
Dimension size = getSize();
border.paintBorder(this, g, 0, 0, size.width, size.height);
}
}
/**
* 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.
*/
protected void oneTouchExpandableChanged() {
if (!DefaultLookup.getBoolean(splitPane, splitPaneUI,
"SplitPane.supportsOneTouchButtons", true)) {
// Look and feel doesn't want to support one touch buttons, bail.
return;
}
if (splitPane.isOneTouchExpandable() &&
leftButton == null &&
rightButton == null) {
/* Create the left button and add an action listener to
expand/collapse it. */
leftButton = createLeftOneTouchButton();
if (leftButton != null)
leftButton.addActionListener(new OneTouchActionHandler(true));
/* Create the right button and add an action listener to
expand/collapse it. */
rightButton = createRightOneTouchButton();
if (rightButton != null)
rightButton.addActionListener(new OneTouchActionHandler
(false));
if (leftButton != null && rightButton != null) {
add(leftButton);
add(rightButton);
}
}
revalidateSplitPane();
}
/**
* Creates and return an instance of JButton that can be used to
* collapse the left component in the split pane.
*/
protected JButton createLeftOneTouchButton() {
JButton b = new JButton() {
public void setBorder(Border b) {
}
public void paint(Graphics g) {
if (splitPane != null) {
int[] xs = new int[3];
int[] ys = new int[3];
int blockSize;
// Fill the background first ...
g.setColor(this.getBackground());
g.fillRect(0, 0, this.getWidth(),
this.getHeight());
// ... then draw the arrow.
g.setColor(Color.black);
if (orientation == JSplitPane.VERTICAL_SPLIT) {
blockSize = Math.min(getHeight(), oneTouchSize);
xs[0] = blockSize;
xs[1] = 0;
xs[2] = blockSize << 1;
ys[0] = 0;
ys[1] = ys[2] = blockSize;
g.drawPolygon(xs, ys, 3); // Little trick to make the
// arrows of equal size
}
else {
blockSize = Math.min(getWidth(), oneTouchSize);
xs[0] = xs[2] = blockSize;
xs[1] = 0;
ys[0] = 0;
ys[1] = blockSize;
ys[2] = blockSize << 1;
}
g.fillPolygon(xs, ys, 3);
}
}
// Don't want the button to participate in focus traversable.
public boolean isFocusTraversable() {
return false;
}
};
b.setMinimumSize(new Dimension(oneTouchSize, oneTouchSize));
b.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
b.setFocusPainted(false);
b.setBorderPainted(false);
b.setRequestFocusEnabled(false);
return b;
}
/**
* Creates and return an instance of JButton that can be used to
* collapse the right component in the split pane.
*/
protected JButton createRightOneTouchButton() {
JButton b = new JButton() {
public void setBorder(Border border) {
}
public void paint(Graphics g) {
if (splitPane != null) {
int[] xs = new int[3];
int[] ys = new int[3];
int blockSize;
// Fill the background first ...
g.setColor(this.getBackground());
g.fillRect(0, 0, this.getWidth(),
this.getHeight());
// ... then draw the arrow.
if (orientation == JSplitPane.VERTICAL_SPLIT) {
blockSize = Math.min(getHeight(), oneTouchSize);
xs[0] = blockSize;
xs[1] = blockSize << 1;
xs[2] = 0;
ys[0] = blockSize;
ys[1] = ys[2] = 0;
}
else {
blockSize = Math.min(getWidth(), oneTouchSize);
xs[0] = xs[2] = 0;
xs[1] = blockSize;
ys[0] = 0;
ys[1] = blockSize;
ys[2] = blockSize << 1;
}
g.setColor(Color.black);
g.fillPolygon(xs, ys, 3);
}
}
// Don't want the button to participate in focus traversable.
public boolean isFocusTraversable() {
return false;
}
};
b.setMinimumSize(new Dimension(oneTouchSize, oneTouchSize));
b.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
b.setFocusPainted(false);
b.setBorderPainted(false);
b.setRequestFocusEnabled(false);
return b;
}
/**
* Message to prepare for dragging. This messages the BasicSplitPaneUI
* with startDragging.
*/
protected void prepareForDragging() {
splitPaneUI.startDragging();
}
/**
* Messages the BasicSplitPaneUI with dragDividerTo that this instance
* is contained in.
*/
protected void dragDividerTo(int location) {
splitPaneUI.dragDividerTo(location);
}
/**
* Messages the BasicSplitPaneUI with finishDraggingTo that this instance
* is contained in.
*/
protected void finishDraggingTo(int location) {
splitPaneUI.finishDraggingTo(location);
}
/**
* MouseHandler is responsible for converting mouse events
* (released, dragged...) into the appropriate DragController
* methods.
*
*/
protected class MouseHandler extends MouseAdapter
implements MouseMotionListener
{
/**
* Starts the dragging session by creating the appropriate instance
* of DragController.
*/
public void mousePressed(MouseEvent e) {
if ((e.getSource() == BasicSplitPaneDivider.this ||
e.getSource() == splitPane) &&
dragger == null &&splitPane.isEnabled()) {
Component newHiddenDivider = splitPaneUI.
getNonContinuousLayoutDivider();
if (hiddenDivider != newHiddenDivider) {
if (hiddenDivider != null) {
hiddenDivider.removeMouseListener(this);
hiddenDivider.removeMouseMotionListener(this);
}
hiddenDivider = newHiddenDivider;
if (hiddenDivider != null) {
hiddenDivider.addMouseMotionListener(this);
hiddenDivider.addMouseListener(this);
}
}
if (splitPane.getLeftComponent() != null &&
splitPane.getRightComponent() != null) {
if (orientation == JSplitPane.HORIZONTAL_SPLIT) {
dragger = new DragController(e);
}
else {
dragger = new VerticalDragController(e);
}
if (!dragger.isValid()) {
dragger = null;
}
else {
prepareForDragging();
dragger.continueDrag(e);
}
}
e.consume();
}
}
/**
* If dragger is not null it is messaged with completeDrag.
*/
public void mouseReleased(MouseEvent e) {
if (dragger != null) {
if (e.getSource() == splitPane) {
dragger.completeDrag(e.getX(), e.getY());
}
else if (e.getSource() == BasicSplitPaneDivider.this) {
Point ourLoc = getLocation();
dragger.completeDrag(e.getX() + ourLoc.x,
e.getY() + ourLoc.y);
}
else if (e.getSource() == hiddenDivider) {
Point hDividerLoc = hiddenDivider.getLocation();
int ourX = e.getX() + hDividerLoc.x;
int ourY = e.getY() + hDividerLoc.y;
dragger.completeDrag(ourX, ourY);
}
dragger = null;
e.consume();
}
}
//
// MouseMotionListener
//
/**
* If dragger is not null it is messaged with continueDrag.
*/
public void mouseDragged(MouseEvent e) {
if (dragger != null) {
if (e.getSource() == splitPane) {
dragger.continueDrag(e.getX(), e.getY());
}
else if (e.getSource() == BasicSplitPaneDivider.this) {
Point ourLoc = getLocation();
dragger.continueDrag(e.getX() + ourLoc.x,
e.getY() + ourLoc.y);
}
else if (e.getSource() == hiddenDivider) {
Point hDividerLoc = hiddenDivider.getLocation();
int ourX = e.getX() + hDividerLoc.x;
int ourY = e.getY() + hDividerLoc.y;
dragger.continueDrag(ourX, ourY);
}
e.consume();
}
}
/**
* Resets the cursor based on the orientation.
*/
public void mouseMoved(MouseEvent e) {
}
/**
* Invoked when the mouse enters a component.
*
* @param e MouseEvent describing the details of the enter event.
* @since 1.5
*/
public void mouseEntered(MouseEvent e) {
if (e.getSource() == BasicSplitPaneDivider.this) {
setMouseOver(true);
}
}
/**
* Invoked when the mouse exits a component.
*
* @param e MouseEvent describing the details of the exit event.
* @since 1.5
*/
public void mouseExited(MouseEvent e) {
if (e.getSource() == BasicSplitPaneDivider.this) {
setMouseOver(false);
}
}
}
/**
* Handles the events during a dragging session for a
* HORIZONTAL_SPLIT oriented split pane. This continually
* messages dragDividerTo and then when done messages
* finishDraggingTo. When an instance is created it should be
* messaged with isValid to insure that dragging can happen
* (dragging won't be allowed if the two views can not be resized).
*
* 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 {@link java.beans.XMLEncoder}.
*/
protected class DragController
{
/**
* Initial location of the divider.
*/
int initialX;
/**
* Maximum and minimum positions to drag to.
*/
int maxX, minX;
/**
* Initial location the mouse down happened at.
*/
int offset;
protected DragController(MouseEvent e) {
JSplitPane splitPane = splitPaneUI.getSplitPane();
Component leftC = splitPane.getLeftComponent();
Component rightC = splitPane.getRightComponent();
initialX = getLocation().x;
if (e.getSource() == BasicSplitPaneDivider.this) {
offset = e.getX();
}
else { // splitPane
offset = e.getX() - initialX;
}
if (leftC == null || rightC == null || offset < -1 ||
offset >= getSize().width) {
// Don't allow dragging.
maxX = -1;
}
else {
Insets insets = splitPane.getInsets();
if (leftC.isVisible()) {
minX = leftC.getMinimumSize().width;
if (insets != null) {
minX += insets.left;
}
}
else {
minX = 0;
}
if (rightC.isVisible()) {
int right = (insets != null) ? insets.right : 0;
maxX = Math.max(0, splitPane.getSize().width -
(getSize().width + right) -
rightC.getMinimumSize().width);
}
else {
int right = (insets != null) ? insets.right : 0;
maxX = Math.max(0, splitPane.getSize().width -
(getSize().width + right));
}
if (maxX < minX) minX = maxX = 0;
}
}
/**
* Returns true if the dragging session is valid.
*/
protected boolean isValid() {
return (maxX > 0);
}
/**
* Returns the new position to put the divider at based on
* the passed in MouseEvent.
*/
protected int positionForMouseEvent(MouseEvent e) {
int newX = (e.getSource() == BasicSplitPaneDivider.this) ?
(e.getX() + getLocation().x) : e.getX();
newX = Math.min(maxX, Math.max(minX, newX - offset));
return newX;
}
/**
* Returns the x argument, since this is used for horizontal
* splits.
*/
protected int getNeededLocation(int x, int y) {
int newX;
newX = Math.min(maxX, Math.max(minX, x - offset));
return newX;
}
protected void continueDrag(int newX, int newY) {
dragDividerTo(getNeededLocation(newX, newY));
}
/**
* Messages dragDividerTo with the new location for the mouse
* event.
*/
protected void continueDrag(MouseEvent e) {
dragDividerTo(positionForMouseEvent(e));
}
protected void completeDrag(int x, int y) {
finishDraggingTo(getNeededLocation(x, y));
}
/**
* Messages finishDraggingTo with the new location for the mouse
* event.
*/
protected void completeDrag(MouseEvent e) {
finishDraggingTo(positionForMouseEvent(e));
}
} // End of BasicSplitPaneDivider.DragController
/**
* Handles the events during a dragging session for a
* VERTICAL_SPLIT oriented split pane. This continually
* messages dragDividerTo and then when done messages
* finishDraggingTo. When an instance is created it should be
* messaged with isValid to insure that dragging can happen
* (dragging won't be allowed if the two views can not be resized).
*/
protected class VerticalDragController extends DragController
{
/* DragControllers ivars are now in terms of y, not x. */
protected VerticalDragController(MouseEvent e) {
super(e);
JSplitPane splitPane = splitPaneUI.getSplitPane();
Component leftC = splitPane.getLeftComponent();
Component rightC = splitPane.getRightComponent();
initialX = getLocation().y;
if (e.getSource() == BasicSplitPaneDivider.this) {
offset = e.getY();
}
else {
offset = e.getY() - initialX;
}
if (leftC == null || rightC == null || offset < -1 ||
offset > getSize().height) {
// Don't allow dragging.
maxX = -1;
}
else {
Insets insets = splitPane.getInsets();
if (leftC.isVisible()) {
minX = leftC.getMinimumSize().height;
if (insets != null) {
minX += insets.top;
}
}
else {
minX = 0;
}
if (rightC.isVisible()) {
int bottom = (insets != null) ? insets.bottom : 0;
maxX = Math.max(0, splitPane.getSize().height -
(getSize().height + bottom) -
rightC.getMinimumSize().height);
}
else {
int bottom = (insets != null) ? insets.bottom : 0;
maxX = Math.max(0, splitPane.getSize().height -
(getSize().height + bottom));
}
if (maxX < minX) minX = maxX = 0;
}
}
/**
* Returns the y argument, since this is used for vertical
* splits.
*/
protected int getNeededLocation(int x, int y) {
int newY;
newY = Math.min(maxX, Math.max(minX, y - offset));
return newY;
}
/**
* Returns the new position to put the divider at based on
* the passed in MouseEvent.
*/
protected int positionForMouseEvent(MouseEvent e) {
int newY = (e.getSource() == BasicSplitPaneDivider.this) ?
(e.getY() + getLocation().y) : e.getY();
newY = Math.min(maxX, Math.max(minX, newY - offset));
return newY;
}
} // End of BasicSplitPaneDividier.VerticalDragController
/**
* Used to layout a BasicSplitPaneDivider.
* Layout for the divider
* involves appropriately moving the left/right buttons around.
*
*/ protected class DividerLayout implements LayoutManager { public void layoutContainer(Container c) { if (leftButton != null && rightButton != null && c == BasicSplitPaneDivider.this) { if (splitPane.isOneTouchExpandable()) { Insets insets = getInsets(); if (orientation == JSplitPane.VERTICAL_SPLIT) { int extraX = (insets != null) ? insets.left : 0; int blockSize = getHeight(); if (insets != null) { blockSize -= (insets.top + insets.bottom); blockSize = Math.max(blockSize, 0); } blockSize = Math.min(blockSize, oneTouchSize); int y = (c.getSize().height - blockSize) / 2; if (!centerOneTouchButtons) { y = (insets != null) ? insets.top : 0; extraX = 0; } leftButton.setBounds(extraX + oneTouchOffset, y, blockSize * 2, blockSize); rightButton.setBounds(extraX + oneTouchOffset + oneTouchSize * 2, y, blockSize * 2, blockSize); } else { int extraY = (insets != null) ? insets.top : 0; int blockSize = getWidth(); if (insets != null) { blockSize -= (insets.left + insets.right); blockSize = Math.max(blockSize, 0); } blockSize = Math.min(blockSize, oneTouchSize); int x = (c.getSize().width - blockSize) / 2; if (!centerOneTouchButtons) { x = (insets != null) ? insets.left : 0; extraY = 0; } leftButton.setBounds(x, extraY + oneTouchOffset, blockSize, blockSize * 2); rightButton.setBounds(x, extraY + oneTouchOffset + oneTouchSize * 2, blockSize, blockSize * 2); } } else { leftButton.setBounds(-5, -5, 1, 1); rightButton.setBounds(-5, -5, 1, 1); } } } public Dimension minimumLayoutSize(Container c) { // NOTE: This isn't really used, refer to // BasicSplitPaneDivider.getPreferredSize for the reason. // I leave it in hopes of having this used at some point. if (c != BasicSplitPaneDivider.this || splitPane == null) { return new Dimension(0,0); } Dimension buttonMinSize = null; if (splitPane.isOneTouchExpandable() && leftButton != null) { buttonMinSize = leftButton.getMinimumSize(); } Insets insets = getInsets(); int width = getDividerSize(); int height = width; if (orientation == JSplitPane.VERTICAL_SPLIT) { if (buttonMinSize != null) { int size = buttonMinSize.height; if (insets != null) { size += insets.top + insets.bottom; } height = Math.max(height, size); } width = 1; } else { if (buttonMinSize != null) { int size = buttonMinSize.width; if (insets != null) { size += insets.left + insets.right; } width = Math.max(width, size); } height = 1; } return new Dimension(width, height); } public Dimension preferredLayoutSize(Container c) { return minimumLayoutSize(c); } public void removeLayoutComponent(Component c) {} public void addLayoutComponent(String string, Component c) {} } // End of class BasicSplitPaneDivider.DividerLayout /** * Listeners installed on the one touch expandable buttons. */ private class OneTouchActionHandler implements ActionListener { /** True indicates the resize should go the minimum (top or left) * vs false which indicates the resize should go to the maximum. */ private boolean toMinimum; OneTouchActionHandler(boolean toMinimum) { this.toMinimum = toMinimum; } public void actionPerformed(ActionEvent e) { Insets insets = splitPane.getInsets(); int lastLoc = splitPane.getLastDividerLocation(); int currentLoc = splitPaneUI.getDividerLocation(splitPane); int newLoc; // We use the location from the UI directly, as the location the // JSplitPane itself maintains is not necessarly correct. if (toMinimum) { if (orientation == JSplitPane.VERTICAL_SPLIT) { if (currentLoc >= (splitPane.getHeight() - insets.bottom - getHeight())) { int maxLoc = splitPane.getMaximumDividerLocation(); newLoc = Math.min(lastLoc, maxLoc); splitPaneUI.setKeepHidden(false); } else { newLoc = insets.top; splitPaneUI.setKeepHidden(true); } } else { if (currentLoc >= (splitPane.getWidth() - insets.right - getWidth())) { int maxLoc = splitPane.getMaximumDividerLocation(); newLoc = Math.min(lastLoc, maxLoc); splitPaneUI.setKeepHidden(false); } else { newLoc = insets.left; splitPaneUI.setKeepHidden(true); } } } else { if (orientation == JSplitPane.VERTICAL_SPLIT) { if (currentLoc == insets.top) { int maxLoc = splitPane.getMaximumDividerLocation(); newLoc = Math.min(lastLoc, maxLoc); splitPaneUI.setKeepHidden(false); } else { newLoc = splitPane.getHeight() - getHeight() - insets.top; splitPaneUI.setKeepHidden(true); } } else { if (currentLoc == insets.left) { int maxLoc = splitPane.getMaximumDividerLocation(); newLoc = Math.min(lastLoc, maxLoc); splitPaneUI.setKeepHidden(false); } else { newLoc = splitPane.getWidth() - getWidth() - insets.left; splitPaneUI.setKeepHidden(true); } } } if (currentLoc != newLoc) { splitPane.setDividerLocation(newLoc); // We do this in case the dividers notion of the location // differs from the real location. splitPane.setLastDividerLocation(currentLoc); } } } // End of class BasicSplitPaneDivider.LeftActionListener }