public void mouseMoved(MouseEvent ev) {
JRootPane root = getRootPane();
if (root.getWindowDecorationStyle() == JRootPane.NONE) {
return;
}
Window w = (Window) ev.getSource();
Frame f = null;
Dialog d = null;
if (w instanceof Frame) {
f = (Frame) w;
} else if (w instanceof Dialog) {
d = (Dialog) w;
}
// Update the cursor
int cursor = getCursor(calculateCorner(w, ev.getX(), ev.getY()));
if (cursor != 0
&& ((f != null && (f.isResizable() && (f.getExtendedState() & Frame.MAXIMIZED_BOTH) == 0))
|| (d != null && d.isResizable()))) {
w.setCursor(Cursor.getPredefinedCursor(cursor));
} else {
w.setCursor(lastCursor);
}
}
/**
* Returns the corner that contains the point <code>x</code>, <code>y</code>, or -1 if the
* position doesn't match a corner.
*/
private int calculateCorner(Window w, int x, int y) {
Insets insets = w.getInsets();
int xPosition = calculatePosition(x - insets.left, w.getWidth() - insets.left - insets.right);
int yPosition = calculatePosition(y - insets.top, w.getHeight() - insets.top - insets.bottom);
if (xPosition == -1 || yPosition == -1) {
return -1;
}
return yPosition * 5 + xPosition;
}
/**
* Installs the necessary Listeners on the parent <code>Window</code>, if there is one.
*
* <p>This takes the parent so that cleanup can be done from <code>removeNotify</code>, at which
* point the parent hasn't been reset yet.
*
* @param parent The parent of the JRootPane
*/
private void installWindowListeners(JRootPane root, Component parent) {
if (parent instanceof Window) {
window = (Window) parent;
} else {
window = SwingUtilities.getWindowAncestor(parent);
}
if (window != null) {
if (mouseInputListener == null) {
mouseInputListener = createWindowMouseInputListener(root);
}
window.addMouseListener(mouseInputListener);
window.addMouseMotionListener(mouseInputListener);
}
}
/** Handles mouse dragged event */
public void mouseDragged(MouseEvent ev) {
Window w = (Window) ev.getSource();
if (isMovingWindow) {
Point windowPt;
try {
windowPt = (Point) AccessController.doPrivileged(getLocationAction);
windowPt.x = windowPt.x - dragOffsetX;
windowPt.y = windowPt.y - dragOffsetY;
w.setLocation(windowPt);
windowMoved = true;
} catch (PrivilegedActionException e) {
}
}
}
/**
* Gets most recent focus owner component associated with the given window. It does that without
* calling Window.getMostRecentFocusOwner since it provides its own logic contradicting with
* setDefautlFocus. Instead, it calls KeyboardFocusManager directly.
*/
private Component getMostRecentFocusOwnerForWindow(Window w) {
Method meth =
AccessController.doPrivileged(
new PrivilegedAction<Method>() {
@Override
public Method run() {
Method meth = null;
try {
meth =
KeyboardFocusManager.class.getDeclaredMethod(
"getMostRecentFocusOwner", new Class<?>[] {Window.class});
meth.setAccessible(true);
} catch (Exception e) {
// Must never happen
e.printStackTrace();
}
return meth;
}
});
if (meth != null) {
// Meth refers static method
try {
return (Component) meth.invoke(null, new Object[] {w});
} catch (Exception e) {
// Must never happen
e.printStackTrace();
}
}
// Will get here if exception was thrown or meth is null
return w.getMostRecentFocusOwner();
}
public void mousePressed(MouseEvent ev) {
JRootPane rootPane = getRootPane();
if (rootPane.getWindowDecorationStyle() == JRootPane.NONE) {
return;
}
Point dragWindowOffset = ev.getPoint();
Window w = (Window) ev.getSource();
if (w != null) {
w.toFront();
}
Point convertedDragWindowOffset =
SwingUtilities.convertPoint(w, dragWindowOffset, getTitlePane());
Frame f = null;
Dialog d = null;
if (w instanceof Frame) {
f = (Frame) w;
} else if (w instanceof Dialog) {
d = (Dialog) w;
}
int frameState = (f != null) ? f.getExtendedState() : 0;
if (getTitlePane() != null && getTitlePane().contains(convertedDragWindowOffset)) {
if ((f != null && ((frameState & Frame.MAXIMIZED_BOTH) == 0) || (d != null))
&& dragWindowOffset.y >= BORDER_DRAG_THICKNESS
&& dragWindowOffset.x >= BORDER_DRAG_THICKNESS
&& dragWindowOffset.x < w.getWidth() - BORDER_DRAG_THICKNESS) {
isMovingWindow = true;
dragOffsetX = dragWindowOffset.x;
dragOffsetY = dragWindowOffset.y;
}
} else if (f != null && f.isResizable() && ((frameState & Frame.MAXIMIZED_BOTH) == 0)
|| (d != null && d.isResizable())) {
dragOffsetX = dragWindowOffset.x;
dragOffsetY = dragWindowOffset.y;
dragWidth = w.getWidth();
dragHeight = w.getHeight();
dragCursor = getCursor(calculateCorner(w, dragWindowOffset.x, dragWindowOffset.y));
}
}
/**
* Uninstalls any state that <code>installClientDecorations</code> has installed.
*
* <p>NOTE: This may be called if you haven't installed client decorations yet (ie before <code>
* installClientDecorations</code> has been invoked).
*/
private void uninstallClientDecorations(JRootPane root) {
uninstallBorder(root);
uninstallWindowListeners(root);
setTitlePane(root, null);
uninstallLayout(root);
// We have to revalidate/repaint root if the style is JRootPane.NONE
// only. When we needs to call revalidate/repaint with other styles
// the installClientDecorations is always called after this method
// imediatly and it will cause the revalidate/repaint at the proper
// time.
int style = root.getWindowDecorationStyle();
if (style == JRootPane.NONE) {
root.repaint();
root.revalidate();
}
// Reset the cursor, as we may have changed it to a resize cursor
if (window != null) {
window.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
}
window = null;
}
public void mouseExited(MouseEvent ev) {
Window w = (Window) ev.getSource();
w.setCursor(lastCursor);
}
public void mouseEntered(MouseEvent ev) {
Window w = (Window) ev.getSource();
lastCursor = w.getCursor();
mouseMoved(ev);
}
public void mouseDragged(MouseEvent ev) {
Window w = (Window) ev.getSource();
Point pt = ev.getPoint();
if (isMovingWindow) {
Point windowPt;
try {
windowPt = (Point) AccessController.doPrivileged(getLocationAction);
windowPt.x = windowPt.x - dragOffsetX;
windowPt.y = windowPt.y - dragOffsetY;
w.setLocation(windowPt);
} catch (PrivilegedActionException e) {
}
} else if (dragCursor != 0) {
Rectangle r = w.getBounds();
Rectangle startBounds = new Rectangle(r);
Dimension min = w.getMinimumSize();
switch (dragCursor) {
case Cursor.E_RESIZE_CURSOR:
adjust(r, min, 0, 0, pt.x + (dragWidth - dragOffsetX) - r.width, 0);
break;
case Cursor.S_RESIZE_CURSOR:
adjust(r, min, 0, 0, 0, pt.y + (dragHeight - dragOffsetY) - r.height);
break;
case Cursor.N_RESIZE_CURSOR:
adjust(r, min, 0, pt.y - dragOffsetY, 0, -(pt.y - dragOffsetY));
break;
case Cursor.W_RESIZE_CURSOR:
adjust(r, min, pt.x - dragOffsetX, 0, -(pt.x - dragOffsetX), 0);
break;
case Cursor.NE_RESIZE_CURSOR:
adjust(
r,
min,
0,
pt.y - dragOffsetY,
pt.x + (dragWidth - dragOffsetX) - r.width,
-(pt.y - dragOffsetY));
break;
case Cursor.SE_RESIZE_CURSOR:
adjust(
r,
min,
0,
0,
pt.x + (dragWidth - dragOffsetX) - r.width,
pt.y + (dragHeight - dragOffsetY) - r.height);
break;
case Cursor.NW_RESIZE_CURSOR:
adjust(
r,
min,
pt.x - dragOffsetX,
pt.y - dragOffsetY,
-(pt.x - dragOffsetX),
-(pt.y - dragOffsetY));
break;
case Cursor.SW_RESIZE_CURSOR:
adjust(
r,
min,
pt.x - dragOffsetX,
0,
-(pt.x - dragOffsetX),
pt.y + (dragHeight - dragOffsetY) - r.height);
break;
default:
break;
}
if (!r.equals(startBounds)) {
w.setBounds(r);
// Defer repaint/validate on mouseReleased unless dynamic
// layout is active.
if (Toolkit.getDefaultToolkit().isDynamicLayoutActive()) {
w.validate();
getRootPane().repaint();
}
}
}
}
/**
* Uninstalls the necessary Listeners on the <code>Window</code> the Listeners were last installed
* on.
*/
private void uninstallWindowListeners(JRootPane root) {
if (window != null) {
window.removeMouseListener(mouseInputListener);
window.removeMouseMotionListener(mouseInputListener);
}
}