* Using the class to generate input events differs from posting
* events to the AWT event queue or AWT components in that the
* events are generated in the platform's native input
* queue. For example, Robot.mouseMove will actually move
* the mouse cursor instead of just generating mouse move events.
*
* Note that some platforms require special privileges or extensions
* to access low-level input control. If the current platform configuration
* does not allow input control, an AWTException will be thrown
* when trying to construct Robot objects. For example, X-Window systems
* will throw the exception if the XTEST 2.2 standard extension is not supported
* (or not enabled) by the X server.
*
* Applications that use Robot for purposes other than self-testing should * handle these error conditions gracefully. * * @author Robi Khan * @since 1.3 */ public class Robot { private static final int MAX_DELAY = 60000; private RobotPeer peer; private boolean isAutoWaitForIdle = false; private int autoDelay = 0; private static int LEGAL_BUTTON_MASK = 0; // location of robot's GC, used in mouseMove(), getPixelColor() and captureScreenImage() private Point gdLoc; private DirectColorModel screenCapCM = null; /** * Constructs a Robot object in the coordinate system of the primary screen. *
*
* @throws AWTException if the platform configuration does not allow
* low-level input control. This exception is always thrown when
* GraphicsEnvironment.isHeadless() returns true
* @throws SecurityException if createRobot permission is not granted
* @see java.awt.GraphicsEnvironment#isHeadless
* @see SecurityManager#checkPermission
* @see AWTPermission
*/
public Robot() throws AWTException {
if (GraphicsEnvironment.isHeadless()) {
throw new AWTException("headless environment");
}
init(GraphicsEnvironment.getLocalGraphicsEnvironment()
.getDefaultScreenDevice());
}
/**
* Creates a Robot for the given screen device. Coordinates passed
* to Robot method calls like mouseMove and createScreenCapture will
* be interpreted as being in the same coordinate system as the
* specified screen. Note that depending on the platform configuration,
* multiple screens may either:
*
* If screen devices are reconfigured such that the coordinate system is
* affected, the behavior of existing Robot objects is undefined.
*
* @param screen A screen GraphicsDevice indicating the coordinate
* system the Robot will operate in.
* @throws AWTException if the platform configuration does not allow
* low-level input control. This exception is always thrown when
* GraphicsEnvironment.isHeadless() returns true.
* @throws IllegalArgumentException if screen is not a screen
* GraphicsDevice.
* @throws SecurityException if createRobot permission is not granted
* @see java.awt.GraphicsEnvironment#isHeadless
* @see GraphicsDevice
* @see SecurityManager#checkPermission
* @see AWTPermission
*/
public Robot(GraphicsDevice screen) throws AWTException {
checkIsScreenDevice(screen);
init(screen);
}
private void init(GraphicsDevice screen) throws AWTException {
checkRobotAllowed();
gdLoc = screen.getDefaultConfiguration().getBounds().getLocation();
Toolkit toolkit = Toolkit.getDefaultToolkit();
if (toolkit instanceof ComponentFactory) {
peer = ((ComponentFactory)toolkit).createRobot(this, screen);
disposer = new RobotDisposer(peer);
sun.java2d.Disposer.addRecord(anchor, disposer);
}
initLegalButtonMask();
}
private static synchronized void initLegalButtonMask() {
if (LEGAL_BUTTON_MASK != 0) return;
int tmpMask = 0;
if (Toolkit.getDefaultToolkit().areExtraMouseButtonsEnabled()){
if (Toolkit.getDefaultToolkit() instanceof SunToolkit) {
final int buttonsNumber = ((SunToolkit)(Toolkit.getDefaultToolkit())).getNumberOfButtons();
for (int i = 0; i < buttonsNumber; i++){
tmpMask |= InputEvent.getMaskForButton(i+1);
}
}
}
tmpMask |= InputEvent.BUTTON1_MASK|
InputEvent.BUTTON2_MASK|
InputEvent.BUTTON3_MASK|
InputEvent.BUTTON1_DOWN_MASK|
InputEvent.BUTTON2_DOWN_MASK|
InputEvent.BUTTON3_DOWN_MASK;
LEGAL_BUTTON_MASK = tmpMask;
}
/* determine if the security policy allows Robot's to be created */
private void checkRobotAllowed() {
SecurityManager security = System.getSecurityManager();
if (security != null) {
security.checkPermission(SecurityConstants.AWT.CREATE_ROBOT_PERMISSION);
}
}
/* check if the given device is a screen device */
private void checkIsScreenDevice(GraphicsDevice device) {
if (device == null || device.getType() != GraphicsDevice.TYPE_RASTER_SCREEN) {
throw new IllegalArgumentException("not a valid screen device");
}
}
private transient Object anchor = new Object();
static class RobotDisposer implements sun.java2d.DisposerRecord {
private final RobotPeer peer;
public RobotDisposer(RobotPeer peer) {
this.peer = peer;
}
public void dispose() {
if (peer != null) {
peer.dispose();
}
}
}
private transient RobotDisposer disposer;
/**
* Moves mouse pointer to given screen coordinates.
* @param x X position
* @param y Y position
*/
public synchronized void mouseMove(int x, int y) {
peer.mouseMove(gdLoc.x + x, gdLoc.y + y);
afterEvent();
}
/**
* Presses one or more mouse buttons. The mouse buttons should
* be released using the {@link #mouseRelease(int)} method.
*
* @param buttons the Button mask; a combination of one or more
* mouse button masks.
*
* It is allowed to use only a combination of valid values as a {@code buttons} parameter. * A valid combination consists of {@code InputEvent.BUTTON1_DOWN_MASK}, * {@code InputEvent.BUTTON2_DOWN_MASK}, {@code InputEvent.BUTTON3_DOWN_MASK} * and values returned by the * {@link InputEvent#getMaskForButton(int) InputEvent.getMaskForButton(button)} method. * * The valid combination also depends on a * {@link Toolkit#areExtraMouseButtonsEnabled() Toolkit.areExtraMouseButtonsEnabled()} value as follows: *
* The following standard button masks are also accepted: *
* It is allowed to use only a combination of valid values as a {@code buttons} parameter. * A valid combination consists of {@code InputEvent.BUTTON1_DOWN_MASK}, * {@code InputEvent.BUTTON2_DOWN_MASK}, {@code InputEvent.BUTTON3_DOWN_MASK} * and values returned by the * {@link InputEvent#getMaskForButton(int) InputEvent.getMaskForButton(button)} method. * * The valid combination also depends on a * {@link Toolkit#areExtraMouseButtonsEnabled() Toolkit.areExtraMouseButtonsEnabled()} value as follows: *
* The following standard button masks are also accepted: *
keyRelease method.
*
* Key codes that have more than one physical key associated with them
* (e.g. KeyEvent.VK_SHIFT could mean either the
* left or right shift key) will map to the left key.
*
* @param keycode Key to press (e.g. KeyEvent.VK_A)
* @throws IllegalArgumentException if keycode is not
* a valid key
* @see #keyRelease(int)
* @see java.awt.event.KeyEvent
*/
public synchronized void keyPress(int keycode) {
checkKeycodeArgument(keycode);
peer.keyPress(keycode);
afterEvent();
}
/**
* Releases a given key.
*
* Key codes that have more than one physical key associated with them
* (e.g. KeyEvent.VK_SHIFT could mean either the
* left or right shift key) will map to the left key.
*
* @param keycode Key to release (e.g. KeyEvent.VK_A)
* @throws IllegalArgumentException if keycode is not a
* valid key
* @see #keyPress(int)
* @see java.awt.event.KeyEvent
*/
public synchronized void keyRelease(int keycode) {
checkKeycodeArgument(keycode);
peer.keyRelease(keycode);
afterEvent();
}
private void checkKeycodeArgument(int keycode) {
// rather than build a big table or switch statement here, we'll
// just check that the key isn't VK_UNDEFINED and assume that the
// peer implementations will throw an exception for other bogus
// values e.g. -1, 999999
if (keycode == KeyEvent.VK_UNDEFINED) {
throw new IllegalArgumentException("Invalid key code");
}
}
/**
* Returns the color of a pixel at the given screen coordinates.
* @param x X position of pixel
* @param y Y position of pixel
* @return Color of the pixel
*/
public synchronized Color getPixelColor(int x, int y) {
Color color = new Color(peer.getRGBPixel(gdLoc.x + x, gdLoc.y + y));
return color;
}
/**
* Creates an image containing pixels read from the screen. This image does
* not include the mouse cursor.
* @param screenRect Rect to capture in screen coordinates
* @return The captured image
* @throws IllegalArgumentException if screenRect width and height are not greater than zero
* @throws SecurityException if readDisplayPixels permission is not granted
* @see SecurityManager#checkPermission
* @see AWTPermission
*/
public synchronized BufferedImage createScreenCapture(Rectangle screenRect) {
checkScreenCaptureAllowed();
// according to the spec, screenRect is relative to robot's GD
Rectangle translatedRect = new Rectangle(screenRect);
translatedRect.translate(gdLoc.x, gdLoc.y);
checkValidRect(translatedRect);
BufferedImage image;
DataBufferInt buffer;
WritableRaster raster;
if (screenCapCM == null) {
/*
* Fix for 4285201
* Create a DirectColorModel equivalent to the default RGB ColorModel,
* except with no Alpha component.
*/
screenCapCM = new DirectColorModel(24,
/* red mask */ 0x00FF0000,
/* green mask */ 0x0000FF00,
/* blue mask */ 0x000000FF);
}
// need to sync the toolkit prior to grabbing the pixels since in some
// cases rendering to the screen may be delayed
Toolkit.getDefaultToolkit().sync();
int pixels[];
int[] bandmasks = new int[3];
pixels = peer.getRGBPixels(translatedRect);
buffer = new DataBufferInt(pixels, pixels.length);
bandmasks[0] = screenCapCM.getRedMask();
bandmasks[1] = screenCapCM.getGreenMask();
bandmasks[2] = screenCapCM.getBlueMask();
raster = Raster.createPackedRaster(buffer, translatedRect.width, translatedRect.height, translatedRect.width, bandmasks, null);
SunWritableRaster.makeTrackable(buffer);
image = new BufferedImage(screenCapCM, raster, false, null);
return image;
}
private static void checkValidRect(Rectangle rect) {
if (rect.width <= 0 || rect.height <= 0) {
throw new IllegalArgumentException("Rectangle width and height must be > 0");
}
}
private static void checkScreenCaptureAllowed() {
SecurityManager security = System.getSecurityManager();
if (security != null) {
security.checkPermission(
SecurityConstants.AWT.READ_DISPLAY_PIXELS_PERMISSION);
}
}
/*
* Called after an event is generated
*/
private void afterEvent() {
autoWaitForIdle();
autoDelay();
}
/**
* Returns whether this Robot automatically invokes waitForIdle
* after generating an event.
* @return Whether waitForIdle is automatically called
*/
public synchronized boolean isAutoWaitForIdle() {
return isAutoWaitForIdle;
}
/**
* Sets whether this Robot automatically invokes waitForIdle
* after generating an event.
* @param isOn Whether waitForIdle is automatically invoked
*/
public synchronized void setAutoWaitForIdle(boolean isOn) {
isAutoWaitForIdle = isOn;
}
/*
* Calls waitForIdle after every event if so desired.
*/
private void autoWaitForIdle() {
if (isAutoWaitForIdle) {
waitForIdle();
}
}
/**
* Returns the number of milliseconds this Robot sleeps after generating an event.
*/
public synchronized int getAutoDelay() {
return autoDelay;
}
/**
* Sets the number of milliseconds this Robot sleeps after generating an event.
* @throws IllegalArgumentException If ms is not between 0 and 60,000 milliseconds inclusive
*/
public synchronized void setAutoDelay(int ms) {
checkDelayArgument(ms);
autoDelay = ms;
}
/*
* Automatically sleeps for the specified interval after event generated.
*/
private void autoDelay() {
delay(autoDelay);
}
/**
* Sleeps for the specified time.
* To catch any InterruptedExceptions that occur,
* Thread.sleep() may be used instead.
* @param ms time to sleep in milliseconds
* @throws IllegalArgumentException if ms is not between 0 and 60,000 milliseconds inclusive
* @see java.lang.Thread#sleep
*/
public synchronized void delay(int ms) {
checkDelayArgument(ms);
try {
Thread.sleep(ms);
} catch(InterruptedException ite) {
ite.printStackTrace();
}
}
private void checkDelayArgument(int ms) {
if (ms < 0 || ms > MAX_DELAY) {
throw new IllegalArgumentException("Delay must be to 0 to 60,000ms");
}
}
/**
* Waits until all events currently on the event queue have been processed.
* @throws IllegalThreadStateException if called on the AWT event dispatching thread
*/
public synchronized void waitForIdle() {
checkNotDispatchThread();
// post a dummy event to the queue so we know when
// all the events before it have been processed
try {
SunToolkit.flushPendingEvents();
EventQueue.invokeAndWait( new Runnable() {
public void run() {
// dummy implementation
}
} );
} catch(InterruptedException ite) {
System.err.println("Robot.waitForIdle, non-fatal exception caught:");
ite.printStackTrace();
} catch(InvocationTargetException ine) {
System.err.println("Robot.waitForIdle, non-fatal exception caught:");
ine.printStackTrace();
}
}
private void checkNotDispatchThread() {
if (EventQueue.isDispatchThread()) {
throw new IllegalThreadStateException("Cannot call method from the event dispatcher thread");
}
}
/**
* Returns a string representation of this Robot.
*
* @return the string representation.
*/
public synchronized String toString() {
String params = "autoDelay = "+getAutoDelay()+", "+"autoWaitForIdle = "+isAutoWaitForIdle();
return getClass().getName() + "[ " + params + " ]";
}
}