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Chapter 19 java.awt Reference |
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Chapter 19 java.awt Reference |
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![[Graphic: Figure from the text]](./figs/event.gif)
The Event class represents events that happen within the Java environment in a platform independent way. Events typically represent user actions, like typing a key or clicking the mouse. Although this class has been updated for the 1.1 release, it is only used for the 1.0 event model. When using the 1.1 event model, all events are represented by subclasses of java.awt.AWTEvent.
public class java.awt.Event
extends java.lang.Object
implements java.io.Serializable {
// Constants
public static final int ACTION_EVENT;
public static final int ALT_MASK;
public static final int BACK_SPACE; 
public static final int CAPS_LOCK;
public static final int CTRL_MASK;
public static final int DELETE;
public static final int DOWN;
public static final int END;
public static final int ENTER;
public static final int ESCAPE;
public static final int F1;
public static final int F2;
public static final int F3;
public static final int F4;
public static final int F5;
public static final int F6;
public static final int F7;
public static final int F8;
public static final int F9;
public static final int F10;
public static final int F11;
public static final int F12;
public static final int GOT_FOCUS;
public static final int HOME;
public static final int INSERT;
public static final int KEY_ACTION;
public static final int KEY_ACTION_RELEASE;
public static final int KEY_PRESS;
public static final int KEY_RELEASE;
public static final int LEFT;
public static final int LIST_DESELECT;
public static final int LIST_SELECT;
public static final int LOAD_FILE;
public static final int LOST_FOCUS;
public static final int META_MASK;
public static final int MOUSE_DOWN;
public static final int MOUSE_DRAG;
public static final int MOUSE_ENTER;
public static final int MOUSE_EXIT;
public static final int MOUSE_MOVE;
public static final int MOUSE_UP;
public static final int NUM_LOCK;
public static final int PAUSE;
public static final int PGDN;
public static final int PGUP;
public static final int PRINT_SCREEN;
public static final int RIGHT;
public static final int SAVE_FILE;
public static final int SCROLL_ABSOLUTE;
public static final int SCROLL_BEGIN;
public static final int SCROLL_END;
public static final int SCROLL_LINE_DOWN;
public static final int SCROLL_LINE_UP;
public static final int SCROLL_LOCK;
public static final int SCROLL_PAGE_DOWN;
public static final int SCROLL_PAGE_UP;
public static final int SHIFT_MASK;
public static final int TAB;
public static final int UP;
public static final int WINDOW_DEICONIFY;
public static final int WINDOW_DESTROY;
public static final int WINDOW_EXPOSE;
public static final int WINDOW_ICONIFY;
public static final int WINDOW_MOVED;
// Variables
public Object arg;
public int clickCount;
public Event evt;
public int id;
public int key;
public int modifiers;
public Object target;
public long when;
public int x;
public int y;
// Constructors
public Event (Object target, int id, Object arg);
public Event (Object target, long when, int id, int x, int y,
int key, int modifiers);
public Event (Object target, long when, int id, int x, int y,
int key, int modifiers, Object arg);
// Instance Methods
public boolean controlDown();
public boolean metaDown();
public boolean shiftDown();
public String toString();
public void translate (int x, int y);
// Protected Instance Methods
protected String paramString();
}
ID constant for Action Event.
Mask for ALT key.
ID constant for Backspace.
ID constant for Caps Lock key.
Mask for Control key.
ID constant for Delete.
ID constant for the down arrow key.
ID constant for End key.
ID constant for Enter key.
ID constant for Escape key.
ID constant for F1 key.
ID constant for F2 key.
ID constant for F3 key.
ID constant for F4 key.
ID constant for F5 key.
ID constant for F6 key.
ID constant for F7 key.
ID constant for F8 key.
ID constant for F9 key.
ID constant for F10 key.
ID constant for F11 key.
ID constant for F12 key.
ID constant for getting input focus Event.
ID constant for Home key.
ID constant for Insert key.
ID constant for Special Key Down Event.
ID constant for Special Key Up Event.
ID constant for Key Down Event.
ID constant for Key Up Event.
ID constant for the left arrow key.
ID constant for List DeSelect Event.
ID constant for List Select Event.
ID constant for File Load Event.
ID constant for losing input focus Event.
Mask for ALT key.
ID constant for Mouse Down Event.
ID constant for Mouse Drag Event.
ID constant for Mouse Enter Event.
ID constant for Mouse Exit Event.
ID constant for Mouse Move Event.
ID constant for Mouse Up Event.
ID constant for Num Lock key.
ID constant for Pause key.
ID constant for PageDown key.
ID constant for PageUp key.
ID constant for Print Screen key.
ID constant for the right arrow key.
ID constant for File Save Event.
ID constant for Absolute Scroll Event.
ID constant for Begin Scroll Event.
ID constant for End Scroll Event.
ID constant for Line Down Scroll Event.
ID constant for Line Up Scroll Event.
Mask for Scroll Lock key.
ID constant for Page Down Scroll Event.
ID constant for Page Up Scroll Event.
Mask for SHIFT key.
ID constant for Tab key.
ID constant for the up arrow key.
ID constant for Window DeIconify Event.
ID constant for Window Destroy Event.
ID constant for Window Expose Event.
ID constant for Window Iconify Event.
ID constant for Window Move Event.
A variable argument that is specific to the event type.
The number of consecutive MOUSE_DOWN events.
A means of passing a linked list of events as one.
The ID constant that identifies the Event type.
Integer value of key pressed, or ID constant identifying a special key.
The state of the shift/alt/control/meta keys, formed by ORing the masks for the appropriate keys.
The Object that generated the event.
The time the event happened.
The x position at which the event happened.
The y position at which the event happened.
The component to which the Event should be delivered
The identifier of Event
The Object that is the cause of the event
Constructs an Event object with the given values.
The component to which the Event should be delivered
The time the event happened
The identifier of Event
The x position at which the event happened
The y position at which the event happened
Integer value of key pressed, or a constant identifying a special key
The state of the shift/alt/control/meta keys
Constructs an Event object with the given values.
The component to which the Event should be delivered
The time the event happened
The identifier of Event
The x position at which the event happened
The y position at which the event happened
Integer value of key pressed, or a constant identifying a special key
The state of the shift/alt/control/meta keys
The Object that is the cause of the event
Constructs an Event object with the given values.
true if the control key was down when the event was triggered, false otherwise.
Checks current settings for modifiers of the Event.
true if the meta key was down when the event was triggered, false otherwise.
Checks current settings for modifiers of the Event.
true if the shift key was down when the event was triggered, false otherwise.
Checks current settings for modifiers of the Event.
A string representation of the Event object.
Object.toString()
Amount to move Event in horizontal direction.
Amount to move Event in vertical direction.
Translates x and y coordinates of Event instance by x and y.
String with current settings of Event.
Helper method for toString() to generate string of current settings.
AWTEvent, Component, Object, String
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EventQueue |
