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/OpenJDK 21

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 java.lang.Object

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

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

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/javax/swing/plaf/basic/BasicMenuUI.MouseInputHandler.html