Class 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:
MenuSelectionManager

Constructors

Modifier Constructor Description
protected MouseInputHandler()

Methods

Modifier and Type Method Description
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 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

Methods declared in interface java.awt.event.MouseListener

mouseClicked, mouseExited

Methods declared in interface java.awt.event.MouseMotionListener

mouseMoved

Constructors

MouseInputHandler

protected MouseInputHandler()

Methods

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

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:
MouseMotionListener.mouseDragged(java.awt.event.MouseEvent)

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https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/plaf/basic/BasicMenuUI.MouseInputHandler.html