Class java.awt.Event 
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Class java.awt.Event 

java.lang.Object
|
   +----java.awt.Event
public class Event
extends Object
Event is a platform-independent class that encapsulates events from the local Graphical User Interface(GUI) platform.

The event contains an id which indicates the type of event it is and which other Event variables are relavent for the event. For keyboard events, key will contain a value indicating the key that was activated and modifiers will contain the modifiers. For KEY_PRESS and KEY_RELEASE event ids, the value of key will be the unicode character code for the key; for KEY_ACTION and KEY_ACTION_RELEASE, the value of key will be one of the defined action-key identifiers in the Event class (PGUP, PGDN, F1, F2, etc).

Variable Index

o ACTION_EVENT
An action event.
o ALT_MASK
The alt modifier constant.
o arg
An arbitrary argument.
o clickCount
The number of consecutive clicks.
o CTRL_MASK
The control modifier constant.
o DOWN
The down arrow action-key.
o END
The end action-key.
o evt
The next event.
o F1
The F1 function action-key.
o F10
The F10 function action-key.
o F11
The F11 function action-key.
o F12
The F12 function action-key.
o F2
The F2 function action-key.
o F3
The F3 function action-key.
o F4
The F4 function action-key.
o F5
The F5 function action-key.
o F6
The F6 function action-key.
o F7
The F7 function action-key.
o F8
The F8 function action-key.
o F9
The F9 function action-key.
o GOT_FOCUS
A component gained the focus.
o HOME
The home action-key.
o id
The type of this event.
o key
The key that was pressed in a keyboard event.
o KEY_ACTION
The action-key press keyboard event.
o KEY_ACTION_RELEASE
The action-key release keyboard event.
o KEY_PRESS
The key press keyboard event.
o KEY_RELEASE
The key release keyboard event.
o LEFT
The left arrow action-key.
o LIST_DESELECT
o LIST_SELECT
o LOAD_FILE
A file loading event.
o LOST_FOCUS
A component lost the focus.
o META_MASK
The meta modifier constant.
o modifiers
The state of the modifier keys.
o MOUSE_DOWN
The mouse down event.
o MOUSE_DRAG
The mouse drag event.
o MOUSE_ENTER
The mouse enter event.
o MOUSE_EXIT
The mouse exit event.
o MOUSE_MOVE
The mouse move event.
o MOUSE_UP
The mouse up event.
o PGDN
The page down action-key.
o PGUP
The page up action-key.
o RIGHT
The right arrow action-key.
o SAVE_FILE
A file saving event.
o SCROLL_ABSOLUTE
The absolute scroll event.
o SCROLL_LINE_DOWN
The line down scroll event.
o SCROLL_LINE_UP
The line up scroll event.
o SCROLL_PAGE_DOWN
The page down scroll event.
o SCROLL_PAGE_UP
The page up scroll event.
o SHIFT_MASK
The shift modifier constant.
o target
The target component.
o UP
The up arrow action-key.
o when
The time stamp.
o WINDOW_DEICONIFY
The de-iconify window event.
o WINDOW_DESTROY
The destroy window event.
o WINDOW_EXPOSE
The expose window event.
o WINDOW_ICONIFY
The iconify window event.
o WINDOW_MOVED
The move window event.
o x
The x coordinate of the event.
o y
The y coordinate of the event.

Constructor Index

o Event(Object, int, Object)
Constructs an event with the specified target component, event type, and argument.
o Event(Object, long, int, int, int, int, int)
Constructs an event with the specified target component, time stamp, event type, x and y coordinates, keyboard key, state of the modifier keys and an argument set to null.
o Event(Object, long, int, int, int, int, int, Object)
Constructs an event with the specified target component, time stamp, event type, x and y coordinates, keyboard key, state of the modifier keys and argument.

Method Index

o controlDown()
Checks if the control key is down.
o metaDown()
Checks if the meta key is down.
o paramString()
Returns the parameter String of this Event.
o shiftDown()
Checks if the shift key is down.
o toString()
Returns the String representation of this Event's values.
o translate(int, int)
Translates an event relative to the given component.

Variables

o SHIFT_MASK 
public final static int SHIFT_MASK
The shift modifier constant.
o CTRL_MASK 
public final static int CTRL_MASK
The control modifier constant.
o META_MASK 
public final static int META_MASK
The meta modifier constant.
o ALT_MASK 
public final static int ALT_MASK
The alt modifier constant.
o HOME 
public final static int HOME
The home action-key.
o END 
public final static int END
The end action-key.
o PGUP 
public final static int PGUP
The page up action-key.
o PGDN 
public final static int PGDN
The page down action-key.
o UP 
public final static int UP
The up arrow action-key.
o DOWN 
public final static int DOWN
The down arrow action-key.
o LEFT 
public final static int LEFT
The left arrow action-key.
o RIGHT 
public final static int RIGHT
The right arrow action-key.
o F1 
public final static int F1
The F1 function action-key.
o F2 
public final static int F2
The F2 function action-key.
o F3 
public final static int F3
The F3 function action-key.
o F4 
public final static int F4
The F4 function action-key.
o F5 
public final static int F5
The F5 function action-key.
o F6 
public final static int F6
The F6 function action-key.
o F7 
public final static int F7
The F7 function action-key.
o F8 
public final static int F8
The F8 function action-key.
o F9 
public final static int F9
The F9 function action-key.
o F10 
public final static int F10
The F10 function action-key.
o F11 
public final static int F11
The F11 function action-key.
o F12 
public final static int F12
The F12 function action-key.
o WINDOW_DESTROY 
public final static int WINDOW_DESTROY
The destroy window event.
o WINDOW_EXPOSE 
public final static int WINDOW_EXPOSE
The expose window event.
o WINDOW_ICONIFY 
public final static int WINDOW_ICONIFY
The iconify window event.
o WINDOW_DEICONIFY 
public final static int WINDOW_DEICONIFY
The de-iconify window event.
o WINDOW_MOVED 
public final static int WINDOW_MOVED
The move window event.
o KEY_PRESS 
public final static int KEY_PRESS
The key press keyboard event.
o KEY_RELEASE 
public final static int KEY_RELEASE
The key release keyboard event.
o KEY_ACTION 
public final static int KEY_ACTION
The action-key press keyboard event.
o KEY_ACTION_RELEASE 
public final static int KEY_ACTION_RELEASE
The action-key release keyboard event.
o MOUSE_DOWN 
public final static int MOUSE_DOWN
The mouse down event.
o MOUSE_UP 
public final static int MOUSE_UP
The mouse up event.
o MOUSE_MOVE 
public final static int MOUSE_MOVE
The mouse move event.
o MOUSE_ENTER 
public final static int MOUSE_ENTER
The mouse enter event.
o MOUSE_EXIT 
public final static int MOUSE_EXIT
The mouse exit event.
o MOUSE_DRAG 
public final static int MOUSE_DRAG
The mouse drag event.
o SCROLL_LINE_UP 
public final static int SCROLL_LINE_UP
The line up scroll event.
o SCROLL_LINE_DOWN 
public final static int SCROLL_LINE_DOWN
The line down scroll event.
o SCROLL_PAGE_UP 
public final static int SCROLL_PAGE_UP
The page up scroll event.
o SCROLL_PAGE_DOWN 
public final static int SCROLL_PAGE_DOWN
The page down scroll event.
o SCROLL_ABSOLUTE 
public final static int SCROLL_ABSOLUTE
The absolute scroll event.
o LIST_SELECT 
public final static int LIST_SELECT
o LIST_DESELECT 
public final static int LIST_DESELECT
o ACTION_EVENT 
public final static int ACTION_EVENT
An action event.
o LOAD_FILE 
public final static int LOAD_FILE
A file loading event.
o SAVE_FILE 
public final static int SAVE_FILE
A file saving event.
o GOT_FOCUS 
public final static int GOT_FOCUS
A component gained the focus.
o LOST_FOCUS 
public final static int LOST_FOCUS
A component lost the focus.
o target 
public Object target
The target component.
o when 
public long when
The time stamp.
o id 
public int id
The type of this event.
o x 
public int x
The x coordinate of the event.
o y 
public int y
The y coordinate of the event.
o key 
public int key
The key that was pressed in a keyboard event.
o modifiers 
public int modifiers
The state of the modifier keys.
o clickCount 
public int clickCount
The number of consecutive clicks. This field is relevant only for MOUSE_DOWN events. If the field isn't set it will be 0. Otherwise, it will be 1 for single-clicks, 2 for double-clicks, and so on.
o arg 
public Object arg
An arbitrary argument.
o evt 
public Event evt
The next event. Used when putting events into a linked list.

Constructors

o Event 
public Event(Object target,
               long when,
               int id,
               int x,
               int y,
               int key,
               int modifiers,
Object arg)
Constructs an event with the specified target component, time stamp, event type, x and y coordinates, keyboard key, state of the modifier keys and argument.
Parameters:
target - the target component
when - the time stamp
id - the event type
x - the x coordinate
y - the y coordinate
key - the key pressed in a keyboard event
modifiers - the state of the modifier keys
arg - the specified argument
o Event 
public Event(Object target,
               long when,
               int id,
               int x,
               int y,
               int key,
               int modifiers)
Constructs an event with the specified target component, time stamp, event type, x and y coordinates, keyboard key, state of the modifier keys and an argument set to null.
Parameters:
target - the target component
when - the time stamp
id - the event type
x - the x coordinate
y - the y coordinate
key - the key pressed in a keyboard event
modifiers - the state of the modifier keys
o Event 
public Event(Object target,
               int id,
Object arg)
Constructs an event with the specified target component, event type, and argument.
Parameters:
target - the target component
id - the event type
arg - the specified argument

Methods

o translate 
public void translate(int x,
                        int y)
Translates an event relative to the given component. This involves at a minimum translating the coordinates so they make sense within the given component. It may also involve translating a region in the case of an expose event.
Parameters:
x - the x coordinate
y - the y coordinate
o shiftDown 
public boolean shiftDown()
Checks if the shift key is down.
See Also:
modifiers, controlDown, metaDown
o controlDown 
public boolean controlDown()
Checks if the control key is down.
See Also:
modifiers, shiftDown, metaDown
o metaDown 
public boolean metaDown()
Checks if the meta key is down.
See Also:
modifiers, shiftDown, controlDown
o paramString 
protected String paramString()
Returns the parameter String of this Event.
o toString 
public String toString()
Returns the String representation of this Event's values.
Overrides:
toString in class Object 
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