/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @author Mikhail Danilov
* @version $Revision$
*/
package org.apache.harmony.awt.wtk;
import java.awt.Insets;
import java.awt.Rectangle;
import java.awt.Point;
import java.awt.event.KeyEvent;
import org.apache.harmony.awt.gl.MultiRectArea;
/**
* The interface describing cross-platform translation of system
* messages.
*
* <p/>Some messages can appear only on specific platform,
* but they still can have cross-platform interpretation if the
* application should be aware of them and can react using
* cross-platform API.
*
*/
public abstract class NativeEvent {
/**
* Message has no common cross-platform
* interpretation and should be skipped.
*/
public static final int ID_PLATFORM = 0;
/**
* Window bounds have changed.
*/
public static final int ID_BOUNDS_CHANGED = -1;
/**
* Window decoration size has changed.
*/
public static final int ID_INSETS_CHANGED = -2;
/**
* Window was just created (WM_CREATE on Windows)
*/
public static final int ID_CREATED = -3;
/**
* Mouse grab was canceled by the native system
*/
public static final int ID_MOUSE_GRAB_CANCELED = -4;
/**
* System color scheme or visual theme was changed
*/
public static final int ID_THEME_CHANGED = -5;
protected long windowId;
protected int eventId;
protected long otherWindowId;
protected Point screenPos;
protected Point localPos;
protected Rectangle windowRect;
protected int modifiers;
protected int mouseButton;
protected int wheelRotation;
protected KeyInfo keyInfo = new KeyInfo();
protected int windowState = -1;
protected long time;
/**
* Returns the system window id of the event recipient.
* @return HWND on Windows, xwindnow on X
*/
public long getWindowId() {
return windowId;
}
/**
* Returns cross-platform event id
* should be one of ID_* constants or
* id constants from java.awt.AWTEvent subclasess
* @return cross-platform event id
*/
public int getEventId() {
return eventId;
}
/**
* Returns the position of cursor when event occured relative to
* top-left corner of recipient window
* @return position of cursor in local coordinates
*/
public Point getLocalPos() {
return localPos;
}
/**
* Returns the position of cursor when event occured
* in screen coordinates.
* @return position of cursor in screen coordinates
*/
public Point getScreenPos() {
return screenPos;
}
/**
* The recipient window bounds when the event occured
* @return window bounds
*/
public Rectangle getWindowRect() {
return windowRect;
}
/**
* Returns the state of keyboard and mouse buttons when the event
* occured if event from mouse or keyboard, for other events can
* return junk values. The value is bitwise OR of
* java.awt.event.InputEvent *_DOWN constants.
*
* Method is aware of system mouse button swap for left-hand
* mouse and return swapped values.
* @return bitwise OR of java.awt.event.InputEvent *_DOWN constants
*/
public int getInputModifiers() {
return modifiers;
}
/**
* Returns the iconified/maximized state of recipient window if
* event is state related, for other events can junk values.
* The value has the same meaning as Frame.getExtendedState
* It's bitwise OR of ICONIFIED, MAXIMIZED_HORIZ, MAXIMIZED_VERT
* @return bitwise OR of ICONIFIED, MAXIMIZED_HORIZ, MAXIMIZED_VERT
*/
public int getWindowState() {
return windowState;
}
/**
* The same meaning as java.awt.event.getKeyCode
* @return java.awt.event VK_* constant
*/
public int getVKey() {
return (keyInfo != null) ? keyInfo.vKey : KeyInfo.DEFAULT_VKEY;
}
/**
* The same meaning as java.awt.event.getKeyLocation
* @return java.awt.event KEY_LOCATION_* constant
*/
public int getKeyLocation() {
return (keyInfo != null) ? keyInfo.keyLocation : KeyInfo.DEFAULT_LOCATION;
}
/**
* Return the string of characters associated with the event
* Has meaning only for KEY_PRESSED as should be translated to
* serie of KEY_TYPED events. For dead keys and input methods
* one key press can generate multiple key chars.
* @return string of characters
*/
public StringBuffer getKeyChars() {
if (keyInfo == null) {
return null;
}
if (keyInfo.vKey == KeyEvent.VK_ENTER) {
keyInfo.keyChars.setLength(0);
keyInfo.setKeyChars('\n');
}
return keyInfo.keyChars;
}
public char getLastChar() {
if (keyInfo == null || keyInfo.keyChars.length() == 0) {
return KeyEvent.CHAR_UNDEFINED;
}
return keyInfo.keyChars.charAt(keyInfo.keyChars.length()-1);
}
/**
* Returns the number of mouse button which changed it's state,
* otherwise 0.
* Left button is 1, middle button is 2, right button is 3.
*
* Method is aware of system mouse button swap for left-hand
* mouse and return swapped values.
* @return mouse button number
*/
public int getMouseButton() {
return mouseButton;
}
/**
* Returns time when the message was received
* @return time in milliseconds
*/
public long getTime() {
return time;
}
/**
* For the focus event contains the oposite window.
* This means it lost focus if recipient gains it,
* or will gain focus if recipient looses it.
* @return HWND on Windows, xwindnow on X
*/
public long getOtherWindowId() {
return otherWindowId;
}
/**
* Returns the "dirty" area of the window as set of non-intersecting
* rectangles. This area is to be painted.
* @return non-empty array of null if empty
*/
public abstract MultiRectArea getClipRects();
/**
* Returns the "dirty" area of the window as one rectangle.
* This area is to be painted.
* @return non-null Rectangle
*/
public abstract Rectangle getClipBounds();
/**
* Returns the window insets. Insets is area which belongs to
* window somehow but is outside of it's client area,
* it usually contains system provided border and titlebar.
* @return non-null java.awt.Insets
*/
public abstract Insets getInsets();
/**
* Returns true if event is popup menu trigger.
* @return boolean flag
*/
public abstract boolean getTrigger();
/**
* Returns the number of "clicks" the mouse wheel was rotated.
* @return negative values if the mouse wheel was rotated up/away from the user,
* and positive values if the mouse wheel was rotated down/ towards the user
*/
public int getWheelRotation() {
return wheelRotation;
}
}
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