下面列出了怎么用javax.swing.MenuSelectionManager的API类实例代码及写法，或者点击链接到github查看源代码。
@BeforeMethod
public void showDialog() throws Throwable {
SwingUtilities.invokeAndWait(new Runnable() {
@Override
public void run() {
frame = new JFrame(JPopupMenuTest.class.getSimpleName());
frame.setName("frame-" + JPopupMenuTest.class.getSimpleName());
PopupMenuDemo demo = new PopupMenuDemo();
frame.setJMenuBar(demo.createMenuBar());
frame.setContentPane(demo.createContentPane());
// Create and set up the popup menu.
demo.createPopupMenu();
frame.pack();
frame.setAlwaysOnTop(true);
frame.setVisible(true);
}
});
MenuSelectionManager.defaultManager().clearSelectedPath();
}
public static void main(String[] args) throws Exception {
SwingUtilities.invokeAndWait(() -> {
JPopupMenu popup = new JPopupMenu("Popup Menu");
JMenu menu = new JMenu("Menu");
menu.add(new JMenuItem("Menu Item"));
popup.add(menu);
menu.doClick();
MenuElement[] elems = MenuSelectionManager
.defaultManager().getSelectedPath();
if (elems == null || elems.length == 0) {
throw new RuntimeException("Empty Selection");
}
if (elems[0] != popup || elems[1] != menu) {
throw new RuntimeException("Necessary menus are not selected!");
}
});
}
public void processKeyEvent(KeyEvent e, MenuElement[] path, MenuSelectionManager manager) {
if (isReturnAction(e)) { // Handle SPACE and ENTER
MenuElement[] p = manager.getSelectedPath();
MenuElement m = p != null && p.length > 0 ? p[p.length - 1] : null;
if (m instanceof StayOpen) {
e.consume();
if (e.getID() == KeyEvent.KEY_PRESSED)
performAction((StayOpen)m, e.getModifiers());
return;
}
} else for (Component component : getComponents()) { // Handle mnemonics and accelerators
if (component instanceof StayOpen) {
StayOpen item = (StayOpen)component;
JMenuItem i = item.getItem();
KeyStroke k = KeyStroke.getKeyStrokeForEvent(e);
if (k.equals(mnemonic(i)) || k.equals(i.getAccelerator())) {
e.consume();
manager.setSelectedPath(new MenuElement[] { this, i });
performAction(item, e.getModifiers());
return;
}
}
}
super.processKeyEvent(e, path, manager);
}
@BeforeMethod
public void showDialog() throws Throwable {
SwingUtilities.invokeAndWait(new Runnable() {
@Override
public void run() {
MenuSelectionManager.defaultManager().clearSelectedPath();
frame = new JFrame(RMenuItemTest.class.getSimpleName());
frame.setName("frame-" + RMenuItemTest.class.getSimpleName());
MenuDemo demo = new MenuDemo();
frame.setJMenuBar(demo.createMenuBar());
frame.setContentPane(demo.createContentPane());
frame.pack();
frame.setVisible(true);
}
});
menus = ComponentUtils.findComponents(JMenu.class, frame);
}
public void processMouseEvent(JMenuItem item, MouseEvent e, MenuElement path[], MenuSelectionManager manager) {
Point p = e.getPoint();
if (p.x >= 0 && p.x < item.getWidth() && p.y >= 0 && p.y < item.getHeight()) {
if (e.getID() == MouseEvent.MOUSE_RELEASED) {
manager.clearSelectedPath();
item.doClick(0);
} else {
manager.setSelectedPath(path);
}
} else if (item.getModel().isArmed()) {
int c = path.length - 1;
MenuElement newPath[] = new MenuElement[c];
for (int i = 0; i < c; i++) {
newPath[i] = path[i];
}
manager.setSelectedPath(newPath);
}
}
@BeforeMethod
public void showDialog() throws Throwable {
SwingUtilities.invokeAndWait(new Runnable() {
@Override
public void run() {
frame = new JFrame(JMenuItemJavaElement2Test.class.getSimpleName());
frame.setName("frame-" + JMenuItemJavaElement2Test.class.getSimpleName());
PopupMenuDemoX demo = new PopupMenuDemoX();
frame.setJMenuBar(demo.createMenuBar());
frame.setContentPane(demo.createContentPane());
// Create and set up the popup menu.
demo.createPopupMenu();
frame.pack();
frame.setAlwaysOnTop(true);
frame.setVisible(true);
}
});
MenuSelectionManager.defaultManager().clearSelectedPath();
JavaElementFactory.add(JMenuItem.class, JMenuItemJavaElement.class);
}
/**
* Workaround for JDK bug 6663119, it ensures that first item in submenu is
* correctly selected during keyboard navigation.
*/
private void ensureSelected() {
if (menu.getMenuComponentCount() <= 0) {
return;
}
Component first = menu.getMenuComponent(0);
if (!(first instanceof JMenuItem)) {
return;
}
Point loc = MouseInfo.getPointerInfo().getLocation();
SwingUtilities.convertPointFromScreen(loc, menu);
MenuElement[] selPath
= MenuSelectionManager.defaultManager().getSelectedPath();
// apply workaround only when mouse is not hovering over menu
// (which signalizes mouse driven menu traversing) and only
// when selected menu path contains expected value - submenu itself
if (!menu.contains(loc) && selPath.length > 0
&& menu.getPopupMenu() == selPath[selPath.length - 1]) {
// select first item in submenu through MenuSelectionManager
MenuElement[] newPath = new MenuElement[selPath.length + 1];
System.arraycopy(selPath, 0, newPath, 0, selPath.length);
JMenuItem firstItem = (JMenuItem) first;
newPath[selPath.length] = firstItem;
MenuSelectionManager.defaultManager().setSelectedPath(newPath);
}
}
/**
* Maps
* {@code JMenuBar.processKeyEvent(KeyEvent, MenuElement[], MenuSelectionManager)}
* through queue
*/
public void processKeyEvent(final KeyEvent keyEvent, final MenuElement[] menuElement, final MenuSelectionManager menuSelectionManager) {
runMapping(new MapVoidAction("processKeyEvent") {
@Override
public void map() {
((JMenuBar) getSource()).processKeyEvent(keyEvent, menuElement, menuSelectionManager);
}
});
}
public boolean postProcessKeyEvent(KeyEvent ev) {
if(ev.isConsumed()) {
// do not manage consumed event
return false;
}
if (ev.getKeyCode() == KeyEvent.VK_ALT) {
root = SwingUtilities.getRootPane(ev.getComponent());
winAncestor = (root == null ? null :
SwingUtilities.getWindowAncestor(root));
if (ev.getID() == KeyEvent.KEY_PRESSED) {
if (!altKeyPressed) {
altPressed(ev);
}
altKeyPressed = true;
return true;
} else if (ev.getID() == KeyEvent.KEY_RELEASED) {
if (altKeyPressed) {
altReleased(ev);
} else {
MenuSelectionManager msm =
MenuSelectionManager.defaultManager();
MenuElement[] path = msm.getSelectedPath();
if (path.length <= 0) {
WindowsLookAndFeel.setMnemonicHidden(true);
WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
}
}
altKeyPressed = false;
}
root = null;
winAncestor = null;
} else {
altKeyPressed = false;
}
return false;
}
void altPressed(KeyEvent ev) {
MenuSelectionManager msm =
MenuSelectionManager.defaultManager();
MenuElement[] path = msm.getSelectedPath();
if (path.length > 0 && ! (path[0] instanceof ComboPopup)) {
msm.clearSelectedPath();
menuCanceledOnPress = true;
ev.consume();
} else if(path.length > 0) { // We are in ComboBox
menuCanceledOnPress = false;
WindowsLookAndFeel.setMnemonicHidden(false);
WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
ev.consume();
} else {
menuCanceledOnPress = false;
WindowsLookAndFeel.setMnemonicHidden(false);
WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
JMenuBar mbar = root != null ? root.getJMenuBar() : null;
if(mbar == null && winAncestor instanceof JFrame) {
mbar = ((JFrame)winAncestor).getJMenuBar();
}
JMenu menu = mbar != null ? mbar.getMenu(0) : null;
if(menu != null) {
ev.consume();
}
}
}
public boolean postProcessKeyEvent(KeyEvent ev) {
if(ev.isConsumed() && ev.getKeyCode() != KeyEvent.VK_ALT) {
// mnemonic combination, it's consumed, but we need
// set altKeyPressed to false, otherwise after selection
// component by mnemonic combination a menu will be open
altKeyPressed = false;
return false;
}
if (ev.getKeyCode() == KeyEvent.VK_ALT) {
root = SwingUtilities.getRootPane(ev.getComponent());
winAncestor = (root == null ? null :
SwingUtilities.getWindowAncestor(root));
if (ev.getID() == KeyEvent.KEY_PRESSED) {
if (!altKeyPressed) {
altPressed(ev);
}
altKeyPressed = true;
return true;
} else if (ev.getID() == KeyEvent.KEY_RELEASED) {
if (altKeyPressed) {
altReleased(ev);
} else {
MenuSelectionManager msm =
MenuSelectionManager.defaultManager();
MenuElement[] path = msm.getSelectedPath();
if (path.length <= 0) {
WindowsLookAndFeel.setMnemonicHidden(true);
WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
}
}
altKeyPressed = false;
}
root = null;
winAncestor = null;
} else {
altKeyPressed = false;
}
return false;
}
void altPressed(KeyEvent ev) {
MenuSelectionManager msm =
MenuSelectionManager.defaultManager();
MenuElement[] path = msm.getSelectedPath();
if (path.length > 0 && ! (path[0] instanceof ComboPopup)) {
msm.clearSelectedPath();
menuCanceledOnPress = true;
ev.consume();
} else if(path.length > 0) { // We are in ComboBox
menuCanceledOnPress = false;
WindowsLookAndFeel.setMnemonicHidden(false);
WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
ev.consume();
} else {
menuCanceledOnPress = false;
WindowsLookAndFeel.setMnemonicHidden(false);
WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
JMenuBar mbar = root != null ? root.getJMenuBar() : null;
if(mbar == null && winAncestor instanceof JFrame) {
mbar = ((JFrame)winAncestor).getJMenuBar();
}
JMenu menu = mbar != null ? mbar.getMenu(0) : null;
if(menu != null) {
ev.consume();
}
}
}
public AllMenuItem(Set<Category> evalCats) {
this.evalCats = evalCats;
this.totalCount = ProviderModel.getInstance()
.getCategories().size();
getModel().addChangeListener(new ChangeListener() {
@Override
public void stateChanged(ChangeEvent e) {
if (isShowing() && model.isArmed()) {
selectedPath = MenuSelectionManager.defaultManager()
.getSelectedPath();
}
}
});
addActionListener(this);
}
public boolean postProcessKeyEvent(KeyEvent ev) {
if(ev.isConsumed() && ev.getKeyCode() != KeyEvent.VK_ALT) {
// mnemonic combination, it's consumed, but we need
// set altKeyPressed to false, otherwise after selection
// component by mnemonic combination a menu will be open
altKeyPressed = false;
return false;
}
if (ev.getKeyCode() == KeyEvent.VK_ALT) {
root = SwingUtilities.getRootPane(ev.getComponent());
winAncestor = (root == null ? null :
SwingUtilities.getWindowAncestor(root));
if (ev.getID() == KeyEvent.KEY_PRESSED) {
if (!altKeyPressed) {
altPressed(ev);
}
altKeyPressed = true;
return true;
} else if (ev.getID() == KeyEvent.KEY_RELEASED) {
if (altKeyPressed) {
altReleased(ev);
} else {
MenuSelectionManager msm =
MenuSelectionManager.defaultManager();
MenuElement[] path = msm.getSelectedPath();
if (path.length <= 0) {
WindowsLookAndFeel.setMnemonicHidden(true);
WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
}
}
altKeyPressed = false;
}
root = null;
winAncestor = null;
} else {
altKeyPressed = false;
}
return false;
}
void altPressed(KeyEvent ev) {
MenuSelectionManager msm =
MenuSelectionManager.defaultManager();
MenuElement[] path = msm.getSelectedPath();
if (path.length > 0 && ! (path[0] instanceof ComboPopup)) {
msm.clearSelectedPath();
menuCanceledOnPress = true;
ev.consume();
} else if(path.length > 0) { // We are in ComboBox
menuCanceledOnPress = false;
WindowsLookAndFeel.setMnemonicHidden(false);
WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
ev.consume();
} else {
menuCanceledOnPress = false;
WindowsLookAndFeel.setMnemonicHidden(false);
WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
JMenuBar mbar = root != null ? root.getJMenuBar() : null;
if(mbar == null && winAncestor instanceof JFrame) {
mbar = ((JFrame)winAncestor).getJMenuBar();
}
JMenu menu = mbar != null ? mbar.getMenu(0) : null;
if(menu != null) {
ev.consume();
}
}
}
void altPressed(KeyEvent ev) {
MenuSelectionManager msm =
MenuSelectionManager.defaultManager();
MenuElement[] path = msm.getSelectedPath();
if (path.length > 0 && ! (path[0] instanceof ComboPopup)) {
msm.clearSelectedPath();
menuCanceledOnPress = true;
ev.consume();
} else if(path.length > 0) { // We are in ComboBox
menuCanceledOnPress = false;
WindowsLookAndFeel.setMnemonicHidden(false);
WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
ev.consume();
} else {
menuCanceledOnPress = false;
WindowsLookAndFeel.setMnemonicHidden(false);
WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
JMenuBar mbar = root != null ? root.getJMenuBar() : null;
if(mbar == null && winAncestor instanceof JFrame) {
mbar = ((JFrame)winAncestor).getJMenuBar();
}
JMenu menu = mbar != null ? mbar.getMenu(0) : null;
if(menu != null) {
ev.consume();
}
}
}
public boolean postProcessKeyEvent(KeyEvent ev) {
if(ev.isConsumed()) {
// do not manage consumed event
return false;
}
if (ev.getKeyCode() == KeyEvent.VK_ALT) {
root = SwingUtilities.getRootPane(ev.getComponent());
winAncestor = (root == null ? null :
SwingUtilities.getWindowAncestor(root));
if (ev.getID() == KeyEvent.KEY_PRESSED) {
if (!altKeyPressed) {
altPressed(ev);
}
altKeyPressed = true;
return true;
} else if (ev.getID() == KeyEvent.KEY_RELEASED) {
if (altKeyPressed) {
altReleased(ev);
} else {
MenuSelectionManager msm =
MenuSelectionManager.defaultManager();
MenuElement[] path = msm.getSelectedPath();
if (path.length <= 0) {
WindowsLookAndFeel.setMnemonicHidden(true);
WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
}
}
altKeyPressed = false;
}
root = null;
winAncestor = null;
} else {
altKeyPressed = false;
}
return false;
}
void altPressed(KeyEvent ev) {
MenuSelectionManager msm =
MenuSelectionManager.defaultManager();
MenuElement[] path = msm.getSelectedPath();
if (path.length > 0 && ! (path[0] instanceof ComboPopup)) {
msm.clearSelectedPath();
menuCanceledOnPress = true;
ev.consume();
} else if(path.length > 0) { // We are in ComboBox
menuCanceledOnPress = false;
WindowsLookAndFeel.setMnemonicHidden(false);
WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
ev.consume();
} else {
menuCanceledOnPress = false;
WindowsLookAndFeel.setMnemonicHidden(false);
WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
JMenuBar mbar = root != null ? root.getJMenuBar() : null;
if(mbar == null && winAncestor instanceof JFrame) {
mbar = ((JFrame)winAncestor).getJMenuBar();
}
JMenu menu = mbar != null ? mbar.getMenu(0) : null;
if(menu != null) {
ev.consume();
}
}
}
/**
* Sets the number of items in the scrolling portion of the menu.
*
* @param scrollCount the number of items to display at a time
* @throws IllegalArgumentException if scrollCount is 0 or negative
*/
public void setScrollCount(int scrollCount) {
if (scrollCount <= 0) {
throw new IllegalArgumentException("scrollCount must be greater than 0");
}
this.scrollCount = scrollCount;
MenuSelectionManager.defaultManager().clearSelectedPath();
}
public boolean postProcessKeyEvent(KeyEvent ev) {
if(ev.isConsumed()) {
// do not manage consumed event
return false;
}
if (ev.getKeyCode() == KeyEvent.VK_ALT) {
root = SwingUtilities.getRootPane(ev.getComponent());
winAncestor = (root == null ? null :
SwingUtilities.getWindowAncestor(root));
if (ev.getID() == KeyEvent.KEY_PRESSED) {
if (!altKeyPressed) {
altPressed(ev);
}
altKeyPressed = true;
return true;
} else if (ev.getID() == KeyEvent.KEY_RELEASED) {
if (altKeyPressed) {
altReleased(ev);
} else {
MenuSelectionManager msm =
MenuSelectionManager.defaultManager();
MenuElement[] path = msm.getSelectedPath();
if (path.length <= 0) {
WindowsLookAndFeel.setMnemonicHidden(true);
WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
}
}
altKeyPressed = false;
}
root = null;
winAncestor = null;
} else {
altKeyPressed = false;
}
return false;
}
public boolean postProcessKeyEvent(KeyEvent ev) {
if(ev.isConsumed()) {
// do not manage consumed event
return false;
}
if (ev.getKeyCode() == KeyEvent.VK_ALT) {
root = SwingUtilities.getRootPane(ev.getComponent());
winAncestor = (root == null ? null :
SwingUtilities.getWindowAncestor(root));
if (ev.getID() == KeyEvent.KEY_PRESSED) {
if (!altKeyPressed) {
altPressed(ev);
}
altKeyPressed = true;
return true;
} else if (ev.getID() == KeyEvent.KEY_RELEASED) {
if (altKeyPressed) {
altReleased(ev);
} else {
MenuSelectionManager msm =
MenuSelectionManager.defaultManager();
MenuElement[] path = msm.getSelectedPath();
if (path.length <= 0) {
WindowsLookAndFeel.setMnemonicHidden(true);
WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
}
}
altKeyPressed = false;
}
root = null;
winAncestor = null;
} else {
altKeyPressed = false;
}
return false;
}
public void mouseReleased(MouseEvent e) {
MenuSelectionManager.defaultManager().processMouseEvent(e);
}
public void mouseReleased(MouseEvent e) {
MenuSelectionManager.defaultManager().processMouseEvent(e);
}
public void mouseMoved(MouseEvent e) {
MenuSelectionManager.defaultManager().processMouseEvent(e);
}
void altReleased(KeyEvent ev) {
if (menuCanceledOnPress) {
WindowsLookAndFeel.setMnemonicHidden(true);
WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
return;
}
MenuSelectionManager msm =
MenuSelectionManager.defaultManager();
if (msm.getSelectedPath().length == 0) {
// if no menu is active, we try activating the menubar
JMenuBar mbar = root != null ? root.getJMenuBar() : null;
if(mbar == null && winAncestor instanceof JFrame) {
mbar = ((JFrame)winAncestor).getJMenuBar();
}
JMenu menu = mbar != null ? mbar.getMenu(0) : null;
// It might happen that the altRelease event is processed
// with a reasonable delay since it has been generated.
// Here we check the last deactivation time of the containing
// window. If this time appears to be greater than the altRelease
// event time the event is skipped to avoid unexpected menu
// activation. See 7121442.
// Also we must ensure that original source of key event belongs
// to the same window object as winAncestor. See 8001633.
boolean skip = false;
Toolkit tk = Toolkit.getDefaultToolkit();
if (tk instanceof SunToolkit) {
Component originalSource = AWTAccessor.getKeyEventAccessor()
.getOriginalSource(ev);
skip = SunToolkit.getContainingWindow(originalSource) != winAncestor ||
ev.getWhen() <= ((SunToolkit) tk).getWindowDeactivationTime(winAncestor);
}
if (menu != null && !skip) {
MenuElement[] path = new MenuElement[2];
path[0] = mbar;
path[1] = menu;
msm.setSelectedPath(path);
} else if(!WindowsLookAndFeel.isMnemonicHidden()) {
WindowsLookAndFeel.setMnemonicHidden(true);
WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
}
} else {
if((msm.getSelectedPath())[0] instanceof ComboPopup) {
WindowsLookAndFeel.setMnemonicHidden(true);
WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
}
}
}
public void mouseDragged(MouseEvent e) {
MenuSelectionManager.defaultManager().processMouseEvent(e);
}
public void mouseEntered(MouseEvent e) {
MenuSelectionManager.defaultManager().processMouseEvent(e);
}
public void mousePressed(MouseEvent e) {
MenuSelectionManager.defaultManager().processMouseEvent(e);
}
void uninstall() {
KeyboardFocusManager.getCurrentKeyboardFocusManager().removeKeyEventPostProcessor( this );
MenuSelectionManager.defaultManager().removeChangeListener( this );
}
public void mouseMoved(MouseEvent e) {
MenuSelectionManager.defaultManager().processMouseEvent(e);
}