Class BasicMenuUI.MouseInputHandler

java.lang.Object

javax.swing.plaf.basic.BasicMenuUI.MouseInputHandler

All Implemented Interfaces:: MouseListener, MouseMotionListener, EventListener, MouseInputListener

Enclosing class:: BasicMenuUI

protected class BasicMenuUI.MouseInputHandler extends Object implements MouseInputListener

Instantiated and used by a menu item to handle the current menu selection from mouse events. A MouseInputHandler processes and forwards all mouse events to a shared instance of the MenuSelectionManager.

This class is protected so that it can be subclassed by other look and feels to implement their own mouse handling behavior. All overridden methods should call the parent methods so that the menu selection is correct.

Since:

1.4

See Also:

Constructor Summary

MouseInputHandler()

Modifier	Constructor	Description
`protected`	Constructs a `MouseInputHandler`.

Method Summary

Modifier and Type	Method	Description
`void`	`mouseClicked(MouseEvent e)`	Invoked when the mouse button has been clicked (pressed and released) on a component.
`void`	`mouseDragged(MouseEvent e)`	Invoked when a mouse button is pressed on the menu and then dragged.
`void`	`mouseEntered(MouseEvent e)`	Invoked when the cursor enters the menu.
`void`	`mouseExited(MouseEvent e)`	Invoked when the mouse exits a component.
`void`	`mouseMoved(MouseEvent e)`	Invoked when the mouse cursor has been moved onto a component but no buttons have been pushed.
`void`	`mousePressed(MouseEvent e)`	Invoked when the mouse has been clicked on the menu.
`void`	`mouseReleased(MouseEvent e)`	Invoked when the mouse has been released on the menu.

Methods declared in class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Modifier and Type	Method	Description
`protected Object`	`clone()`	Creates and returns a copy of this object.
`boolean`	`equals(Object obj)`	Indicates whether some other object is "equal to" this one.
`protected void`	`finalize()`	Deprecated, for removal: This API element is subject to removal in a future version. Finalization is deprecated and subject to removal in a future release.
`final Class<?>`	`getClass()`	Returns the runtime class of this `Object`.
`int`	`hashCode()`	Returns a hash code value for this object.
`final void`	`notify()`	Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()`	Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()`	Returns a string representation of the object.
`final void`	`wait()`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
`final void`	`wait(long timeoutMillis)`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis, int nanos)`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

Constructor Details

MouseInputHandler

protected MouseInputHandler()

Constructs a MouseInputHandler.

Method Details

mouseClicked

public void mouseClicked(MouseEvent e)

Description copied from interface: MouseListener

Invoked when the mouse button has been clicked (pressed and released) on a component.

Specified by:: mouseClicked in interface MouseListener
Parameters:: e - the event to be processed

mousePressed

public void mousePressed(MouseEvent e)

Invoked when the mouse has been clicked on the menu. This method clears or sets the selection path of the MenuSelectionManager.

Specified by:: mousePressed in interface MouseListener
Parameters:: e - the mouse event

mouseReleased

public void mouseReleased(MouseEvent e)

Invoked when the mouse has been released on the menu. Delegates the mouse event to the MenuSelectionManager.

Specified by:: mouseReleased in interface MouseListener
Parameters:: e - the mouse event

mouseEntered

public void mouseEntered(MouseEvent e)

Invoked when the cursor enters the menu. This method sets the selected path for the MenuSelectionManager and handles the case in which a menu item is used to pop up an additional menu, as in a hierarchical menu system.

Specified by:: mouseEntered in interface MouseListener
Parameters:: e - the mouse event; not used

mouseExited

public void mouseExited(MouseEvent e)

Description copied from interface: MouseListener

Invoked when the mouse exits a component.

Specified by:: mouseExited in interface MouseListener
Parameters:: e - the event to be processed

mouseDragged

public void mouseDragged(MouseEvent e)

Invoked when a mouse button is pressed on the menu and then dragged. Delegates the mouse event to the MenuSelectionManager.

Specified by:

mouseDragged in interface MouseMotionListener

Parameters:

e - the mouse event

See Also:

mouseMoved

public void mouseMoved(MouseEvent e)

Description copied from interface: MouseMotionListener

Invoked when the mouse cursor has been moved onto a component but no buttons have been pushed.

Specified by:: mouseMoved in interface MouseMotionListener
Parameters:: e - the event to be processed

© 1993, 2025, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.