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Computational Problem Solving with Java and Interactive Object Graphics

Mark F. Russo, PhD

Appendix E DoodlePad Pad Events

The Pad class offers several opportunities to handle events by overriding its methods. In addition to mouse-related events, the Pad class handles keyboard events, network socket events, as well as a global timer.
Table E.0.1. Overridable Pad Mouse, Keyboard and Timer Event Methods
Method Description
public void onMousePressed(double x, double y, int button) 1  A method that can be overridden to handle mouse pressed events.
public void onMouseReleased(double x, double y, int button) 2  A method that can be overridden to handle mouse released events.
public void onMouseMoved(double x, double y, int button) 3  A method that can be overridden to handle mouse moved events.
public void onMouseClicked(double x, double y, int button) 4  A method that can be overridden to handle mouse clicked events.
public void onMouseDoubleClicked(double x, double y, int button) 5  A method that can be overridden to handle mouse double-clicked events.
public void onMouseDragged(double x, double y, int button) 6  A method that can be overridden to handle mouse dragged events. A mouse dragged event is the same as a mouse moved event while the mouse is pressed.
public void onMouseEntered(double x, double y, int button) 7  A method that can be overridden to handle mouse entered events.
public void onMouseExited(double x, double y, int button) 8  A method that can be overridden to handle mouse exited events.
public void onKeyPressed(java.lang.String keyText, java.lang.String keyModifiers) 9  A method that can be overridden to handle key pressed events
public void onKeyReleased(java.lang.String keyText, java.lang.String keyModifiers) 10  A method that can be overridden to handle key released events
public void onKeyTyped(char keyChar) 11  A method that can be overridden to handle key typed events
public void onTick(long when) 12  A method that can be overridden to handle the Pad timer`s tick event. The timer tick rate is set with the setTickRate() method. The timer is started by invoking the startTimer() method. The timer is stopped by invoking the stopTimer() method.
Table E.0.2. Overridable Pad Socket Event Methods
Method Description
public void onClientOpened(int id) 13  Invoked when a new client connection opens
public void onClientOpened(int id) 14  Invoked when a new client connection opens
public void onClientReceived(int id, java.lang.String msg) 15  Invoked when a connected client socket receives a message
public void onClientClosed(int id) 16  Invoked when a client connection is closed
public void onClientError(int id, java.lang.String msg) 17  Invoked when a connected client socket has has error
public void onClientInfo(int id, java.lang.String msg) 18  Invoked when a connected client socket has some information to share
public void onServerStarted() 19  Invoked when the listening server starts
public void onServerStopped() 20  Invoked when the listening server stops and all connections are closed
public void onServerError(java.lang.String msg) 21  Invoked when the listening server has an error
public void onServerInfo(java.lang.String msg) 22  Invoked when the listening server has some information to share
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onMousePressed-double-double-int-
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onMouseReleased-double-double-int-
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onMouseMoved-double-double-int-
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onMouseClicked-double-double-int-
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onMouseDoubleClicked-double-double-int-
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onMouseDragged-double-double-int-
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onMouseEntered-double-double-int-
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onMouseExited-double-double-int-
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onKeyPressed-java.lang.String-java.lang.String-
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onKeyReleased-java.lang.String-java.lang.String-
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onKeyTyped-char-
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onTick-long-
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onClientOpened-int-
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onClientOpened-int-
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onClientReceived-int-java.lang.String-
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onClientClosed-int-
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onClientError-int-java.lang.String-
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onClientInfo-int-java.lang.String-
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onServerStarted--
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onServerStopped--
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onServerError-java.lang.String-
doodlepad.org/dist/javadoc/doodlepad/Pad.html#onServerInfo-java.lang.String-
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