705 lines
20 KiB
Java
705 lines
20 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.input;
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import java.nio.ByteBuffer;
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import java.nio.IntBuffer;
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import java.security.AccessController;
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import java.security.PrivilegedAction;
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import java.util.HashMap;
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import java.util.Map;
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import org.lwjgl.BufferUtils;
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import org.lwjgl.LWJGLException;
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import org.lwjgl.LWJGLUtil;
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import org.lwjgl.Sys;
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import org.lwjgl.opengl.Display;
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import org.lwjgl.opengl.InputImplementation;
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import static org.lwjgl.LWJGLUtil.getPrivilegedBoolean;
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/**
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* <br>
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* A raw Mouse interface. This can be used to poll the current state of the
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* mouse buttons, and determine the mouse movement delta since the last poll.
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*
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* n buttons supported, n being a native limit. A scrolly wheel is also
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* supported, if one such is available. Movement is reported as delta from
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* last position or as an absolute position. If the window has been created
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* the absolute position will be clamped to 0 - width | height.
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*
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* @author cix_foo <cix_foo@users.sourceforge.net>
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* @author elias_naur <elias_naur@users.sourceforge.net>
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* @author Brian Matzon <brian@matzon.dk>
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* @version $Revision$
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* $Id$
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*/
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public class Mouse {
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/** Internal use - event size in bytes */
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public static final int EVENT_SIZE = 1 + 1 + 4 + 4 + 4 + 8;
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/** Has the mouse been created? */
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private static boolean created;
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/** The mouse buttons status from the last poll */
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private static ByteBuffer buttons;
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/** Mouse absolute X position in pixels */
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private static int x;
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/** Mouse absolute Y position in pixels */
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private static int y;
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/** Mouse absolute X position in pixels without any clipping */
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private static int absolute_x;
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/** Mouse absolute Y position in pixels without any clipping */
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private static int absolute_y;
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/** Buffer to hold the deltas dx, dy and dwheel */
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private static IntBuffer coord_buffer;
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/** Delta X */
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private static int dx;
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/** Delta Y */
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private static int dy;
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/** Delta Z */
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private static int dwheel;
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/** Number of buttons supported by the mouse */
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private static int buttonCount = -1;
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/** Does this mouse support a scroll wheel */
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private static boolean hasWheel;
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/** The current native cursor, if any */
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private static Cursor currentCursor;
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/** Button names. These are set upon create(), to names like BUTTON0, BUTTON1, etc. */
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private static String[] buttonName;
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/** hashmap of button names, for fast lookup */
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private static final Map<String, Integer> buttonMap = new HashMap<String, Integer>(16);
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/** Lazy initialization */
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private static boolean initialized;
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/** The mouse button events from the last read */
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private static ByteBuffer readBuffer;
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/** The current mouse event button being examined */
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private static int eventButton;
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/** The current state of the button being examined in the event queue */
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private static boolean eventState;
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/** The current delta of the mouse in the event queue */
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private static int event_dx;
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private static int event_dy;
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private static int event_dwheel;
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/** The current absolute position of the mouse in the event queue */
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private static int event_x;
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private static int event_y;
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private static long event_nanos;
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/** The position of the mouse it was grabbed at */
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private static int grab_x;
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private static int grab_y;
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/** The last absolute mouse event position (before clipping) for delta computation */
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private static int last_event_raw_x;
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private static int last_event_raw_y;
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/** Buffer size in events */
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private static final int BUFFER_SIZE = 50;
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private static boolean isGrabbed;
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private static InputImplementation implementation;
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/** Whether we need cursor animation emulation */
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private static final boolean emulateCursorAnimation = LWJGLUtil.getPlatform() == LWJGLUtil.PLATFORM_WINDOWS ||
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LWJGLUtil.getPlatform() == LWJGLUtil.PLATFORM_MACOSX;
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private static boolean clipMouseCoordinatesToWindow = !getPrivilegedBoolean("org.lwjgl.input.Mouse.allowNegativeMouseCoords");
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/**
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* Mouse cannot be constructed.
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*/
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private Mouse() {
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}
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/**
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* Gets the currently bound native cursor, if any.
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*
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* @return the currently bound native cursor, if any.
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*/
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public static Cursor getNativeCursor() {
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synchronized (OpenGLPackageAccess.global_lock) {
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return currentCursor;
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}
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}
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/**
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* Binds a native cursor. If the cursor argument is null, any
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* currently bound native cursor is disabled, and the cursor reverts
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* to the default operating system supplied cursor.
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*
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* NOTE: The native cursor is not constrained to the window, but
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* relative events will not be generated if the cursor is outside.
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*
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* @param cursor the native cursor object to bind. May be null.
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* @return The previous Cursor object set, or null.
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* @throws LWJGLException if the cursor could not be set for any reason
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*/
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public static Cursor setNativeCursor(Cursor cursor) throws LWJGLException {
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synchronized (OpenGLPackageAccess.global_lock) {
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if ((Cursor.getCapabilities() & Cursor.CURSOR_ONE_BIT_TRANSPARENCY) == 0)
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throw new IllegalStateException("Mouse doesn't support native cursors");
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Cursor oldCursor = currentCursor;
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currentCursor = cursor;
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if (isCreated()) {
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if (currentCursor != null) {
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implementation.setNativeCursor(currentCursor.getHandle());
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currentCursor.setTimeout();
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} else {
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implementation.setNativeCursor(null);
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}
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}
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return oldCursor;
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}
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}
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public static boolean isClipMouseCoordinatesToWindow() {
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return clipMouseCoordinatesToWindow;
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}
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public static void setClipMouseCoordinatesToWindow(boolean clip) {
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clipMouseCoordinatesToWindow = clip;
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}
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/**
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* Set the position of the cursor. If the cursor is not grabbed,
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* the native cursor is moved to the new position.
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*
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* @param new_x The x coordinate of the new cursor position in OpenGL coordinates relative
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* to the window origin.
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* @param new_y The y coordinate of the new cursor position in OpenGL coordinates relative
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* to the window origin.
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*/
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public static void setCursorPosition(int new_x, int new_y) {
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synchronized (OpenGLPackageAccess.global_lock) {
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if (!isCreated())
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throw new IllegalStateException("Mouse is not created");
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x = event_x = new_x;
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y = event_y = new_y;
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if (!isGrabbed() && (Cursor.getCapabilities() & Cursor.CURSOR_ONE_BIT_TRANSPARENCY) != 0) {
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implementation.setCursorPosition(x, y);
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}
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else {
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grab_x = new_x;
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grab_y = new_y;
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}
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}
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}
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/**
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* Static initialization
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*/
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private static void initialize() {
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Sys.initialize();
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// Assign names to all the buttons
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buttonName = new String[16];
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for (int i = 0; i < 16; i++) {
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buttonName[i] = "BUTTON" + i;
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buttonMap.put(buttonName[i], i);
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}
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initialized = true;
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}
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private static void resetMouse() {
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dx = dy = dwheel = 0;
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readBuffer.position(readBuffer.limit());
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}
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static InputImplementation getImplementation() {
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return implementation;
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}
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/**
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* "Create" the mouse with the given custom implementation. This is used
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* reflectively by AWTInputAdapter.
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*
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* @throws LWJGLException if the mouse could not be created for any reason
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*/
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private static void create(InputImplementation impl) throws LWJGLException {
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if (created)
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return;
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if (!initialized)
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initialize();
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implementation = impl;
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implementation.createMouse();
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hasWheel = implementation.hasWheel();
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created = true;
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// set mouse buttons
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buttonCount = implementation.getButtonCount();
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buttons = BufferUtils.createByteBuffer(buttonCount);
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coord_buffer = BufferUtils.createIntBuffer(3);
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if (currentCursor != null && implementation.getNativeCursorCapabilities() != 0)
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setNativeCursor(currentCursor);
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readBuffer = ByteBuffer.allocate(EVENT_SIZE * BUFFER_SIZE);
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readBuffer.limit(0);
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setGrabbed(isGrabbed);
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}
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/**
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* "Create" the mouse. The display must first have been created.
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* Initially, the mouse is not grabbed and the delta values are reported
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* with respect to the center of the display.
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*
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* @throws LWJGLException if the mouse could not be created for any reason
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*/
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public static void create() throws LWJGLException {
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synchronized (OpenGLPackageAccess.global_lock) {
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if (!Display.isCreated()) throw new IllegalStateException("Display must be created.");
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create(OpenGLPackageAccess.createImplementation());
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}
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}
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/**
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* @return true if the mouse has been created
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*/
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public static boolean isCreated() {
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synchronized (OpenGLPackageAccess.global_lock) {
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return created;
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}
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}
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/**
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* "Destroy" the mouse.
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*/
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public static void destroy() {
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synchronized (OpenGLPackageAccess.global_lock) {
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if (!created) return;
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created = false;
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buttons = null;
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coord_buffer = null;
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implementation.destroyMouse();
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}
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}
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/**
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* Polls the mouse for its current state. Access the polled values using the
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* get<value> methods.
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* By using this method, it is possible to "miss" mouse click events if you don't
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* poll fast enough.
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*
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* To use buffered values, you have to call <code>next</code> for each event you
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* want to read. You can query which button caused the event by using
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* <code>getEventButton</code>. To get the state of that button, for that event, use
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* <code>getEventButtonState</code>.
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*
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* NOTE: This method does not query the operating system for new events. To do that,
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* Display.processMessages() (or Display.update()) must be called first.
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*
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* @see org.lwjgl.input.Mouse#next()
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* @see org.lwjgl.input.Mouse#getEventButton()
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* @see org.lwjgl.input.Mouse#getEventButtonState()
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* @see org.lwjgl.input.Mouse#isButtonDown(int button)
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* @see org.lwjgl.input.Mouse#getX()
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* @see org.lwjgl.input.Mouse#getY()
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* @see org.lwjgl.input.Mouse#getDX()
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* @see org.lwjgl.input.Mouse#getDY()
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* @see org.lwjgl.input.Mouse#getDWheel()
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*/
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public static void poll() {
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synchronized (OpenGLPackageAccess.global_lock) {
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if (!created) throw new IllegalStateException("Mouse must be created before you can poll it");
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implementation.pollMouse(coord_buffer, buttons);
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/* If we're grabbed, poll returns mouse deltas, if not it returns absolute coordinates */
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int poll_coord1 = coord_buffer.get(0);
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int poll_coord2 = coord_buffer.get(1);
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/* The wheel is always relative */
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int poll_dwheel = coord_buffer.get(2);
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if (isGrabbed()) {
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dx += poll_coord1;
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dy += poll_coord2;
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x += poll_coord1;
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y += poll_coord2;
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absolute_x += poll_coord1;
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absolute_y += poll_coord2;
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} else {
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dx = poll_coord1 - absolute_x;
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dy = poll_coord2 - absolute_y;
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absolute_x = x = poll_coord1;
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absolute_y = y = poll_coord2;
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}
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if(clipMouseCoordinatesToWindow) {
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x = Math.min(Display.getWidth() - 1, Math.max(0, x));
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y = Math.min(Display.getHeight() - 1, Math.max(0, y));
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}
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dwheel += poll_dwheel;
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read();
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}
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}
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private static void read() {
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readBuffer.compact();
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implementation.readMouse(readBuffer);
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readBuffer.flip();
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}
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/**
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* See if a particular mouse button is down.
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*
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* @param button The index of the button you wish to test (0..getButtonCount-1)
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* @return true if the specified button is down
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*/
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public static boolean isButtonDown(int button) {
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synchronized (OpenGLPackageAccess.global_lock) {
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if (!created) throw new IllegalStateException("Mouse must be created before you can poll the button state");
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if (button >= buttonCount || button < 0)
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return false;
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else
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return buttons.get(button) == 1;
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}
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}
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/**
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* Gets a button's name
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* @param button The button
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* @return a String with the button's human readable name in it or null if the button is unnamed
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*/
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public static String getButtonName(int button) {
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synchronized (OpenGLPackageAccess.global_lock) {
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if (button >= buttonName.length || button < 0)
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return null;
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else
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return buttonName[button];
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}
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}
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/**
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* Get's a button's index. If the button is unrecognised then -1 is returned.
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* @param buttonName The button name
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*/
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public static int getButtonIndex(String buttonName) {
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synchronized (OpenGLPackageAccess.global_lock) {
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Integer ret = buttonMap.get(buttonName);
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if (ret == null)
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return -1;
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else
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return ret;
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}
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}
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/**
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* Gets the next mouse event. You can query which button caused the event by using
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* <code>getEventButton()</code> (if any). To get the state of that key, for that event, use
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* <code>getEventButtonState</code>. To get the current mouse delta values use <code>getEventDX()</code>
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* and <code>getEventDY()</code>.
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* @see org.lwjgl.input.Mouse#getEventButton()
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* @see org.lwjgl.input.Mouse#getEventButtonState()
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* @return true if a mouse event was read, false otherwise
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*/
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public static boolean next() {
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synchronized (OpenGLPackageAccess.global_lock) {
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if (!created) throw new IllegalStateException("Mouse must be created before you can read events");
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if (readBuffer.hasRemaining()) {
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eventButton = readBuffer.get();
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eventState = readBuffer.get() != 0;
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if (isGrabbed()) {
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event_dx = readBuffer.getInt();
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event_dy = readBuffer.getInt();
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event_x += event_dx;
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event_y += event_dy;
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last_event_raw_x = event_x;
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last_event_raw_y = event_y;
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} else {
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int new_event_x = readBuffer.getInt();
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int new_event_y = readBuffer.getInt();
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event_dx = new_event_x - last_event_raw_x;
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event_dy = new_event_y - last_event_raw_y;
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event_x = new_event_x;
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event_y = new_event_y;
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last_event_raw_x = new_event_x;
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last_event_raw_y = new_event_y;
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}
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if(clipMouseCoordinatesToWindow) {
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event_x = Math.min(Display.getWidth() - 1, Math.max(0, event_x));
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event_y = Math.min(Display.getHeight() - 1, Math.max(0, event_y));
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}
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event_dwheel = readBuffer.getInt();
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event_nanos = readBuffer.getLong();
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return true;
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} else
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return false;
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}
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}
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/**
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* @return Current events button. Returns -1 if no button state was changed
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*/
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public static int getEventButton() {
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synchronized (OpenGLPackageAccess.global_lock) {
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return eventButton;
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}
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}
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/**
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* Get the current events button state.
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* @return Current events button state.
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*/
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public static boolean getEventButtonState() {
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synchronized (OpenGLPackageAccess.global_lock) {
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return eventState;
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}
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}
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/**
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* @return Current events delta x.
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*/
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public static int getEventDX() {
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synchronized (OpenGLPackageAccess.global_lock) {
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return event_dx;
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}
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}
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/**
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* @return Current events delta y.
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*/
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public static int getEventDY() {
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synchronized (OpenGLPackageAccess.global_lock) {
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return event_dy;
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}
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}
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/**
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* @return Current events absolute x.
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*/
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public static int getEventX() {
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synchronized (OpenGLPackageAccess.global_lock) {
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return event_x;
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}
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}
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/**
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* @return Current events absolute y.
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*/
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public static int getEventY() {
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synchronized (OpenGLPackageAccess.global_lock) {
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return event_y;
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}
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}
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/**
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* @return Current events delta z
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*/
|
|
public static int getEventDWheel() {
|
|
synchronized (OpenGLPackageAccess.global_lock) {
|
|
return event_dwheel;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Gets the time in nanoseconds of the current event.
|
|
* Only useful for relative comparisons with other
|
|
* Mouse events, as the absolute time has no defined
|
|
* origin.
|
|
*
|
|
* @return The time in nanoseconds of the current event
|
|
*/
|
|
public static long getEventNanoseconds() {
|
|
synchronized (OpenGLPackageAccess.global_lock) {
|
|
return event_nanos;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Retrieves the absolute position. It will be clamped to
|
|
* 0...width-1.
|
|
*
|
|
* @return Absolute x axis position of mouse
|
|
*/
|
|
public static int getX() {
|
|
synchronized (OpenGLPackageAccess.global_lock) {
|
|
return x;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Retrieves the absolute position. It will be clamped to
|
|
* 0...height-1.
|
|
*
|
|
* @return Absolute y axis position of mouse
|
|
*/
|
|
public static int getY() {
|
|
synchronized (OpenGLPackageAccess.global_lock) {
|
|
return y;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @return Movement on the x axis since last time getDX() was called.
|
|
*/
|
|
public static int getDX() {
|
|
synchronized (OpenGLPackageAccess.global_lock) {
|
|
int result = dx;
|
|
dx = 0;
|
|
return result;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @return Movement on the y axis since last time getDY() was called.
|
|
*/
|
|
public static int getDY() {
|
|
synchronized (OpenGLPackageAccess.global_lock) {
|
|
int result = dy;
|
|
dy = 0;
|
|
return result;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @return Movement of the wheel since last time getDWheel() was called
|
|
*/
|
|
public static int getDWheel() {
|
|
synchronized (OpenGLPackageAccess.global_lock) {
|
|
int result = dwheel;
|
|
dwheel = 0;
|
|
return result;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @return Number of buttons on this mouse
|
|
*/
|
|
public static int getButtonCount() {
|
|
synchronized (OpenGLPackageAccess.global_lock) {
|
|
return buttonCount;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @return Whether or not this mouse has wheel support
|
|
*/
|
|
public static boolean hasWheel() {
|
|
synchronized (OpenGLPackageAccess.global_lock) {
|
|
return hasWheel;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @return whether or not the mouse has grabbed the cursor
|
|
*/
|
|
public static boolean isGrabbed() {
|
|
synchronized (OpenGLPackageAccess.global_lock) {
|
|
return isGrabbed;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sets whether or not the mouse has grabbed the cursor
|
|
* (and thus hidden). If grab is false, the getX() and getY()
|
|
* will return delta movement in pixels clamped to the display
|
|
* dimensions, from the center of the display.
|
|
*
|
|
* @param grab whether the mouse should be grabbed
|
|
*/
|
|
public static void setGrabbed(boolean grab) {
|
|
synchronized (OpenGLPackageAccess.global_lock) {
|
|
boolean grabbed = isGrabbed;
|
|
isGrabbed = grab;
|
|
if (isCreated()) {
|
|
if (grab && !grabbed) {
|
|
// store location mouse was grabbed
|
|
grab_x = x;
|
|
grab_y = y;
|
|
}
|
|
else if (!grab && grabbed) {
|
|
// move mouse back to location it was grabbed before ungrabbing
|
|
if ((Cursor.getCapabilities() & Cursor.CURSOR_ONE_BIT_TRANSPARENCY) != 0)
|
|
implementation.setCursorPosition(grab_x, grab_y);
|
|
}
|
|
|
|
implementation.grabMouse(grab);
|
|
// Get latest values from native side
|
|
poll();
|
|
event_x = x;
|
|
event_y = y;
|
|
last_event_raw_x = x;
|
|
last_event_raw_y = y;
|
|
resetMouse();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Updates the cursor, so that animation can be changed if needed.
|
|
* This method is called automatically by the window on its update, and
|
|
* shouldn't be called otherwise
|
|
*/
|
|
public static void updateCursor() {
|
|
synchronized (OpenGLPackageAccess.global_lock) {
|
|
if (emulateCursorAnimation && currentCursor != null && currentCursor.hasTimedOut() && Mouse.isInsideWindow()) {
|
|
currentCursor.nextCursor();
|
|
try {
|
|
setNativeCursor(currentCursor);
|
|
} catch (LWJGLException e) {
|
|
if (LWJGLUtil.DEBUG) e.printStackTrace();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Retrieves whether or not the mouse cursor is within the bounds of the window.
|
|
* If the mouse cursor was moved outside the display during a drag, then the result of calling
|
|
* this method will be true until the button is released.
|
|
* @return true if mouse is inside display, false otherwise.
|
|
*/
|
|
public static boolean isInsideWindow() {
|
|
return implementation.isInsideWindow();
|
|
}
|
|
}
|