Class MouseInfo

public class MouseInfo
extends Object

MouseInfo provides methods for getting information about the mouse, such as mouse pointer location and the number of mouse buttons.

Since:
1.5

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type Method Description
static int getNumberOfButtons()

Returns the number of buttons on the mouse.
static PointerInfo getPointerInfo()

Returns a PointerInfo instance that represents the current location of the mouse pointer.

Methods declared in class java.lang.Object

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

Method Detail

getPointerInfo

public static PointerInfo getPointerInfo()
                                  throws HeadlessException

Returns a PointerInfo instance that represents the current location of the mouse pointer. The GraphicsDevice stored in this PointerInfo contains the mouse pointer. The coordinate system used for the mouse position depends on whether or not the GraphicsDevice is part of a virtual screen device. For virtual screen devices, the coordinates are given in the virtual coordinate system, otherwise they are returned in the coordinate system of the GraphicsDevice. See GraphicsConfiguration for more information about the virtual screen devices. On systems without a mouse, returns null.

If there is a security manager, its checkPermission method is called with an AWTPermission("watchMousePointer") permission before creating and returning a PointerInfo object. This may result in a SecurityException.

Returns:
location of the mouse pointer
Throws:
HeadlessException - if GraphicsEnvironment.isHeadless() returns true
SecurityException - if a security manager exists and its checkPermission method doesn't allow the operation
Since:
1.5
See Also:
GraphicsConfiguration, SecurityManager.checkPermission(java.security.Permission), AWTPermission

getNumberOfButtons

public static int getNumberOfButtons()
                              throws HeadlessException

Returns the number of buttons on the mouse. On systems without a mouse, returns -1. The number of buttons is obtained from the AWT Toolkit by requesting the "awt.mouse.numButtons" desktop property which is set by the underlying native platform.

Returns:
number of buttons on the mouse
Throws:
HeadlessException - if GraphicsEnvironment.isHeadless() returns true
Since:
1.5
See Also:
Toolkit.getDesktopProperty(java.lang.String)