271 lines
7.4 KiB
Java
271 lines
7.4 KiB
Java
/*
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* Copyright (c) 2002-2008 LWJGL Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of 'LWJGL' nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.lwjgl.opengl;
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/**
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* An AWT implementation of a LWJGL compatible Mouse event queue.
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* @author elias_naur
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*/
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import java.awt.Component;
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import java.awt.Point;
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import java.awt.event.MouseEvent;
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import java.awt.event.MouseListener;
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import java.awt.event.MouseMotionListener;
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import java.awt.event.MouseWheelEvent;
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import java.awt.event.MouseWheelListener;
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import java.nio.ByteBuffer;
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import java.nio.IntBuffer;
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import org.lwjgl.input.Mouse;
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class MouseEventQueue extends EventQueue implements MouseListener, MouseMotionListener, MouseWheelListener {
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private static final int WHEEL_SCALE = 120;
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public static final int NUM_BUTTONS = 3;
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private final Component component;
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private boolean grabbed;
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/** The accumulated mouse deltas returned by poll() */
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private int accum_dx;
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private int accum_dy;
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private int accum_dz;
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/** The last mouse position */
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private int last_x;
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private int last_y;
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/** Saved control key state for ctrl-click right button emulation */
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private boolean saved_control_state;
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/** Event scratch array */
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private final ByteBuffer event = ByteBuffer.allocate(Mouse.EVENT_SIZE);
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/** Buttons array */
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private final byte[] buttons = new byte[NUM_BUTTONS];
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MouseEventQueue(Component component) {
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super(Mouse.EVENT_SIZE);
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this.component = component;
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}
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public synchronized void register() {
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resetCursorToCenter();
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if (component != null) {
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component.addMouseListener(this);
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component.addMouseMotionListener(this);
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component.addMouseWheelListener(this);
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}
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}
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public synchronized void unregister() {
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if (component != null) {
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component.removeMouseListener(this);
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component.removeMouseMotionListener(this);
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component.removeMouseWheelListener(this);
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}
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}
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protected Component getComponent() {
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return component;
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}
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public synchronized void setGrabbed(boolean grabbed) {
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this.grabbed = grabbed;
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resetCursorToCenter();
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}
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public synchronized boolean isGrabbed() {
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return grabbed;
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}
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protected int transformY(int y) {
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if (component != null) {
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return component.getHeight() - 1 - y;
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}
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return y;
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}
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protected void resetCursorToCenter() {
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clearEvents();
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accum_dx = accum_dy = 0;
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if (component != null) {
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Point cursor_location = AWTUtil.getCursorPosition(component);
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if (cursor_location != null) {
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last_x = cursor_location.x;
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last_y = cursor_location.y;
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}
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}
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}
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private void putMouseEvent(byte button, byte state, int dz, long nanos) {
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if (grabbed)
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putMouseEventWithCoords(button, state, 0, 0, dz, nanos);
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else
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putMouseEventWithCoords(button, state, last_x, last_y, dz, nanos);
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}
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protected void putMouseEventWithCoords(byte button, byte state, int coord1, int coord2, int dz, long nanos) {
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event.clear();
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event.put(button).put(state).putInt(coord1).putInt(coord2).putInt(dz).putLong(nanos);
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event.flip();
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putEvent(event);
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}
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public synchronized void poll(IntBuffer coord_buffer, ByteBuffer buttons_buffer) {
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if ( grabbed ) {
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coord_buffer.put(0, accum_dx);
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coord_buffer.put(1, accum_dy);
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} else {
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coord_buffer.put(0, last_x);
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coord_buffer.put(1, last_y);
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}
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coord_buffer.put(2, accum_dz);
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accum_dx = accum_dy = accum_dz = 0;
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int old_position = buttons_buffer.position();
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buttons_buffer.put(buttons, 0, buttons.length);
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buttons_buffer.position(old_position);
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}
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private void setCursorPos(int x, int y, long nanos) {
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y = transformY(y);
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if ( grabbed )
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return;
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int dx = x - last_x;
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int dy = y - last_y;
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addDelta(dx, dy);
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last_x = x;
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last_y = y;
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putMouseEventWithCoords((byte)-1, (byte)0, x, y, 0, nanos);
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}
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protected void addDelta(int dx, int dy) {
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accum_dx += dx;
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accum_dy += dy;
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}
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public void mouseClicked(MouseEvent e) {
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}
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public void mouseEntered(MouseEvent e) {
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}
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public void mouseExited(MouseEvent e) {
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}
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private void handleButton(MouseEvent e) {
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byte state;
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switch (e.getID()) {
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case MouseEvent.MOUSE_PRESSED:
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state = 1;
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break;
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case MouseEvent.MOUSE_RELEASED:
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state = 0;
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break;
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default:
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throw new IllegalArgumentException("Not a valid event ID: " + e.getID());
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}
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byte button;
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switch (e.getButton()) {
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case MouseEvent.NOBUTTON:
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// Nothing to do, so return
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return;
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case MouseEvent.BUTTON1:
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// Emulate right click if ctrl is down
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if (state == 1)
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saved_control_state = e.isControlDown();
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if (saved_control_state) {
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if (buttons[1] == state)
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return; // ignore
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button = (byte)1;
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} else {
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button = (byte)0;
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}
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break;
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case MouseEvent.BUTTON2:
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button = (byte)2;
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break;
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case MouseEvent.BUTTON3:
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if (buttons[1] == state)
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return; // ignore
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button = (byte)1;
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break;
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default:
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throw new IllegalArgumentException("Not a valid button: " + e.getButton());
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}
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setButton(button, state, e.getWhen()*1000000);
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}
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public synchronized void mousePressed(MouseEvent e) {
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handleButton(e);
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}
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private void setButton(byte button, byte state, long nanos) {
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buttons[button] = state;
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putMouseEvent(button, state, 0, nanos);
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}
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public synchronized void mouseReleased(MouseEvent e) {
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handleButton(e);
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}
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private void handleMotion(MouseEvent e) {
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if (grabbed) {
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updateDeltas(e.getWhen()*1000000);
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} else {
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setCursorPos(e.getX(), e.getY(), e.getWhen()*1000000);
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}
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}
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public synchronized void mouseDragged(MouseEvent e) {
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handleMotion(e);
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}
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public synchronized void mouseMoved(MouseEvent e) {
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handleMotion(e);
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}
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private void handleWheel(int amount, long nanos) {
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accum_dz += amount;
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putMouseEvent((byte)-1, (byte)0, amount, nanos);
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}
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protected void updateDeltas(long nanos) {
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}
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public synchronized void mouseWheelMoved(MouseWheelEvent e) {
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int wheel_amount = -e.getWheelRotation() * WHEEL_SCALE;
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handleWheel(wheel_amount, e.getWhen()*1000000);
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}
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}
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