org.piccolo2d.extras.pswing.PSwingMouseEvent Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2011, Piccolo2D project, http://piccolo2d.org
* Copyright (c) 1998-2008, University of Maryland
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided
* that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this list of conditions
* and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice, this list of conditions
* and the following disclaimer in the documentation and/or other materials provided with the
* distribution.
*
* None of the name of the University of Maryland, the name of the Piccolo2D project, or the names of its
* contributors may be used to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package org.piccolo2d.extras.pswing;
import java.awt.Component;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseWheelEvent;
import java.awt.geom.Point2D;
import java.io.Serializable;
import org.piccolo2d.PNode;
import org.piccolo2d.event.PInputEvent;
import org.piccolo2d.util.PPickPath;
/**
* PMouseEvent is an event which indicates that a mouse action occurred
* in a node.
*
* This low-level event is generated by a node object for:
*
* - Mouse Events
*
* - a mouse button is pressed
* - a mouse button is released
* - a mouse button is clicked (pressed and released)
* - the mouse cursor enters a node
* - the mouse cursor exits a node
*
*
*
*
*
* A PMouseEvent object is passed to every PMouseListener or
* PMouseAdapter object which registered to receive the
* "interesting" mouse events using the component's
* addMouseListener method. (PMouseAdapter objects
* implement the PMouseListener interface.) Each such listener
* object gets a PMouseEvent containing the mouse event.
*
*
* Warning: Serialized objects of this class will not be compatible with
* future Piccolo2d releases. The current serialization support is appropriate
* for short term storage or RMI between applications running the same version
* of Piccolo2d. A future release of Piccolo2d will provide support for long
* term persistence.
*
*
* @author Benjamin B. Bederson
* @author Sam R. Reid
* @author Lance E. Good
*/
public class PSwingMouseEvent extends MouseEvent implements Serializable, PSwingEvent {
private static final long serialVersionUID = 1L;
private final int id;
private final transient PInputEvent event;
/**
* Constructs a new PMouse event from a Java MouseEvent.
*
* @param id The event type (MOUSE_PRESSED, MOUSE_RELEASED, MOUSE_CLICKED,
* MOUSE_ENTERED, MOUSE_EXITED)
* @param swingEvent The original swing mouse event when in MOUSE_RELEASED
* events.
* @param piccoloEvent used to query about the event's Piccolo context
*/
protected PSwingMouseEvent(final int id, final MouseEvent swingEvent, final PInputEvent piccoloEvent) {
super((Component) swingEvent.getSource(), swingEvent.getID(), swingEvent.getWhen(), swingEvent.getModifiers(),
swingEvent.getX(), swingEvent.getY(), swingEvent.getClickCount(), swingEvent.isPopupTrigger());
this.id = id;
this.event = piccoloEvent;
}
/**
* Creates and returns a new PMouse event from a Java MouseEvent.
*
* @param id The event type (MOUSE_PRESSED, MOUSE_RELEASED, MOUSE_CLICKED,
* MOUSE_ENTERED, MOUSE_EXITED, MOUSE_MOVED, MOUSE_DRAGGED)
* @param swingEvent The original swing mouse event when in
* MOUSE_DRAGGED and MOUSE_RELEASED events.
* @param pEvent used to query about the event's Piccolo2d context
*
* @return the constructed PSwingEvent
*/
public static PSwingEvent createMouseEvent(final int id, final MouseEvent swingEvent, final PInputEvent pEvent) {
if (pEvent == null) {
throw new IllegalArgumentException("PInputEvent associated with PSwingEvent may not be null");
}
if (id == MouseEvent.MOUSE_MOVED || id == MouseEvent.MOUSE_DRAGGED) {
return new PSwingMouseMotionEvent(id, swingEvent, pEvent);
}
else if (id == MouseEvent.MOUSE_WHEEL) {
return new PSwingMouseWheelEvent(id, (MouseWheelEvent) swingEvent, pEvent);
}
else {
return new PSwingMouseEvent(id, swingEvent, pEvent);
}
}
/**
* Returns the x,y position of the event in the local coordinate system of
* the node the event occurred on.
*
* @return a Point2D object containing the x and y coordinates local to the
* node.
*/
public Point2D getLocalPoint() {
return new Point2D.Double(getX(), getY());
}
/**
* Returns the horizontal x position of the event in the local coordinate
* system of the node the event occurred on.
*
* @return x a double indicating horizontal position local to the node.
*/
public double getLocalX() {
return getLocalPoint().getX();
}
/**
* Returns the vertical y position of the event in the local coordinate
* system of the node the event occurred on.
*
* @return y a double indicating vertical position local to the node.
*/
public double getLocalY() {
return getLocalPoint().getY();
}
/**
* Determine the event type.
*
* @return the id
*/
public int getID() {
return id;
}
/**
* Determine the node the event originated at. If an event percolates up the
* tree and is handled by an event listener higher up in the tree than the
* original node that generated the event, this returns the original node.
* For mouse drag and release events, this is the node that the original
* matching press event went to - in other words, the event is 'grabbed' by
* the originating node.
*
* @return the node
*/
public PNode getNode() {
return event.getPickedNode();
}
/**
* Determine the path the event took from the PCanvas down to the visual
* component.
*
* @return the path
*/
public PPickPath getPath() {
return event.getPath();
}
/**
* Determine the node the event originated at. If an event percolates up the
* tree and is handled by an event listener higher up in the tree than the
* original node that generated the event, this returns the original node.
* For mouse drag and release events, this is the node that the original
* matching press event went to - in other words, the event is 'grabbed' by
* the originating node.
*
* @return the node
*/
public PNode getGrabNode() {
return event.getPickedNode();
}
/**
* Return the path from the PCanvas down to the currently grabbed object.
*
* @return the path
*/
public PPickPath getGrabPath() {
return getPath();
}
/**
* Get the current node that is under the cursor. This may return a
* different result then getGrabNode() when in a MOUSE_RELEASED or
* MOUSE_DRAGGED event.
*
* @return the current node.
*/
public PNode getCurrentNode() {
return event.getPickedNode();
}
/**
* Get the path from the PCanvas down to the visual component currently
* under the mouse.This may give a different result then getGrabPath()
* durring a MOUSE_DRAGGED or MOUSE_RELEASED operation.
*
* @return the current path.
*/
public PPickPath getCurrentPath() {
return getPath();
}
/**
* Calls appropriate method on the listener based on this events ID.
*
* @param listener the MouseListener or MouseMotionListener to dispatch to.
*/
public void dispatchTo(final Object listener) {
final MouseListener mouseListener = (MouseListener) listener;
switch (getID()) {
case MouseEvent.MOUSE_CLICKED:
mouseListener.mouseClicked(this);
break;
case MouseEvent.MOUSE_ENTERED:
mouseListener.mouseEntered(this);
break;
case MouseEvent.MOUSE_EXITED:
mouseListener.mouseExited(this);
break;
case MouseEvent.MOUSE_PRESSED:
mouseListener.mousePressed(this);
break;
case MouseEvent.MOUSE_RELEASED:
mouseListener.mouseReleased(this);
break;
default:
throw new RuntimeException("PMouseEvent with bad ID");
}
}
/**
* Set the souce of this event. As the event is fired up the tree the source
* of the event will keep changing to reflect the scenegraph object that is
* firing the event.
*
* @param newSource the currently reported source of the event (will change
* as event is bubbled up)
*/
public void setSource(final Object newSource) {
source = newSource;
}
/**
* Returns this PSwingMouseEvent's MouseEvent.
*
* @return underlying mouse event of this PSwingMouseEvent
*/
public MouseEvent asMouseEvent() {
return this;
}
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