public void actionPerformed(ActionEvent e) {
JDesktopPane dp = (JDesktopPane) e.getSource();
String key = getName();
if (CLOSE == key || MAXIMIZE == key || MINIMIZE == key || RESTORE == key) {
setState(dp, key);
} else if (ESCAPE == key) {
if (sourceFrame == dp.getSelectedFrame() && focusOwner != null) {
focusOwner.requestFocus();
}
moving = false;
resizing = false;
sourceFrame = null;
focusOwner = null;
} else if (MOVE == key || RESIZE == key) {
sourceFrame = dp.getSelectedFrame();
if (sourceFrame == null) {
return;
}
moving = (key == MOVE) ? true : false;
resizing = (key == RESIZE) ? true : false;
focusOwner = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
if (!SwingUtilities.isDescendingFrom(focusOwner, sourceFrame)) {
focusOwner = null;
}
sourceFrame.requestFocus();
} else if (LEFT == key
|| RIGHT == key
|| UP == key
|| DOWN == key
|| SHRINK_RIGHT == key
|| SHRINK_LEFT == key
|| SHRINK_UP == key
|| SHRINK_DOWN == key) {
JInternalFrame c = dp.getSelectedFrame();
if (sourceFrame == null
|| c != sourceFrame
|| KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner()
!= sourceFrame) {
return;
}
Insets minOnScreenInsets = UIManager.getInsets("Desktop.minOnScreenInsets");
Dimension size = c.getSize();
Dimension minSize = c.getMinimumSize();
int dpWidth = dp.getWidth();
int dpHeight = dp.getHeight();
int delta;
Point loc = c.getLocation();
if (LEFT == key) {
if (moving) {
c.setLocation(
loc.x + size.width - MOVE_RESIZE_INCREMENT < minOnScreenInsets.right
? -size.width + minOnScreenInsets.right
: loc.x - MOVE_RESIZE_INCREMENT,
loc.y);
} else if (resizing) {
c.setLocation(loc.x - MOVE_RESIZE_INCREMENT, loc.y);
c.setSize(size.width + MOVE_RESIZE_INCREMENT, size.height);
}
} else if (RIGHT == key) {
if (moving) {
c.setLocation(
loc.x + MOVE_RESIZE_INCREMENT > dpWidth - minOnScreenInsets.left
? dpWidth - minOnScreenInsets.left
: loc.x + MOVE_RESIZE_INCREMENT,
loc.y);
} else if (resizing) {
c.setSize(size.width + MOVE_RESIZE_INCREMENT, size.height);
}
} else if (UP == key) {
if (moving) {
c.setLocation(
loc.x,
loc.y + size.height - MOVE_RESIZE_INCREMENT < minOnScreenInsets.bottom
? -size.height + minOnScreenInsets.bottom
: loc.y - MOVE_RESIZE_INCREMENT);
} else if (resizing) {
c.setLocation(loc.x, loc.y - MOVE_RESIZE_INCREMENT);
c.setSize(size.width, size.height + MOVE_RESIZE_INCREMENT);
}
} else if (DOWN == key) {
if (moving) {
c.setLocation(
loc.x,
loc.y + MOVE_RESIZE_INCREMENT > dpHeight - minOnScreenInsets.top
? dpHeight - minOnScreenInsets.top
: loc.y + MOVE_RESIZE_INCREMENT);
} else if (resizing) {
c.setSize(size.width, size.height + MOVE_RESIZE_INCREMENT);
}
} else if (SHRINK_LEFT == key && resizing) {
// Make sure we don't resize less than minimum size.
if (minSize.width < (size.width - MOVE_RESIZE_INCREMENT)) {
delta = MOVE_RESIZE_INCREMENT;
} else {
delta = size.width - minSize.width;
}
// Ensure that we keep the internal frame on the desktop.
if (loc.x + size.width - delta < minOnScreenInsets.left) {
delta = loc.x + size.width - minOnScreenInsets.left;
}
c.setSize(size.width - delta, size.height);
} else if (SHRINK_RIGHT == key && resizing) {
// Make sure we don't resize less than minimum size.
if (minSize.width < (size.width - MOVE_RESIZE_INCREMENT)) {
delta = MOVE_RESIZE_INCREMENT;
} else {
delta = size.width - minSize.width;
}
// Ensure that we keep the internal frame on the desktop.
if (loc.x + delta > dpWidth - minOnScreenInsets.right) {
delta = (dpWidth - minOnScreenInsets.right) - loc.x;
}
c.setLocation(loc.x + delta, loc.y);
c.setSize(size.width - delta, size.height);
} else if (SHRINK_UP == key && resizing) {
// Make sure we don't resize less than minimum size.
if (minSize.height < (size.height - MOVE_RESIZE_INCREMENT)) {
delta = MOVE_RESIZE_INCREMENT;
} else {
delta = size.height - minSize.height;
}
// Ensure that we keep the internal frame on the desktop.
if (loc.y + size.height - delta < minOnScreenInsets.bottom) {
delta = loc.y + size.height - minOnScreenInsets.bottom;
}
c.setSize(size.width, size.height - delta);
} else if (SHRINK_DOWN == key && resizing) {
// Make sure we don't resize less than minimum size.
if (minSize.height < (size.height - MOVE_RESIZE_INCREMENT)) {
delta = MOVE_RESIZE_INCREMENT;
} else {
delta = size.height - minSize.height;
}
// Ensure that we keep the internal frame on the desktop.
if (loc.y + delta > dpHeight - minOnScreenInsets.top) {
delta = (dpHeight - minOnScreenInsets.top) - loc.y;
}
c.setLocation(loc.x, loc.y + delta);
c.setSize(size.width, size.height - delta);
}
} else if (NEXT_FRAME == key || PREVIOUS_FRAME == key) {
dp.selectFrame((key == NEXT_FRAME) ? true : false);
} else if (NAVIGATE_NEXT == key || NAVIGATE_PREVIOUS == key) {
boolean moveForward = true;
if (NAVIGATE_PREVIOUS == key) {
moveForward = false;
}
Container cycleRoot = dp.getFocusCycleRootAncestor();
if (cycleRoot != null) {
FocusTraversalPolicy policy = cycleRoot.getFocusTraversalPolicy();
if (policy != null && policy instanceof SortingFocusTraversalPolicy) {
SortingFocusTraversalPolicy sPolicy = (SortingFocusTraversalPolicy) policy;
boolean idc = sPolicy.getImplicitDownCycleTraversal();
try {
sPolicy.setImplicitDownCycleTraversal(false);
if (moveForward) {
KeyboardFocusManager.getCurrentKeyboardFocusManager().focusNextComponent(dp);
} else {
KeyboardFocusManager.getCurrentKeyboardFocusManager().focusPreviousComponent(dp);
}
} finally {
sPolicy.setImplicitDownCycleTraversal(idc);
}
}
}
}
}