211 lines
6.8 KiB
Java
211 lines
6.8 KiB
Java
/*
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* Copyright (c) 2002-2004 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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* This is the Windows implementation of the Keyboard.
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* @author elias_naur
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*/
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import java.nio.ByteBuffer;
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import java.nio.IntBuffer;
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import java.nio.CharBuffer;
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import org.lwjgl.LWJGLException;
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import org.lwjgl.LWJGLUtil;
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import org.lwjgl.BufferUtils;
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import org.lwjgl.input.Keyboard;
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final class WindowsKeyboard {
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private final static int MAPVK_VK_TO_VSC = 0;
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private final static int BUFFER_SIZE = 50;
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private final long hwnd;
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private final ByteBuffer keyboard_state;
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private final byte[] key_down_buffer = new byte[Keyboard.KEYBOARD_SIZE];
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private final EventQueue event_queue = new EventQueue(Keyboard.EVENT_SIZE);
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private final ByteBuffer tmp_event = ByteBuffer.allocate(Keyboard.EVENT_SIZE);
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private final boolean unicode;
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private final CharBuffer unicode_buffer;
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private final ByteBuffer ascii_buffer;
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private boolean grabbed;
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public WindowsKeyboard(long hwnd) throws LWJGLException {
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this.hwnd = hwnd;
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keyboard_state = BufferUtils.createByteBuffer(256);
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unicode = isWindowsNT();
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if (unicode) {
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unicode_buffer = BufferUtils.createCharBuffer(BUFFER_SIZE);
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ascii_buffer = null;
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} else {
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unicode_buffer = null;
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// ToAscii returns at most 2 characters
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ascii_buffer = BufferUtils.createByteBuffer(2);
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}
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}
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private static native boolean isWindowsNT();
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public void destroy() {
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}
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public void grab(boolean grab) {
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if(grab) {
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if (!grabbed) {
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grabbed = true;
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}
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} else {
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if (grabbed) {
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grabbed = false;
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}
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}
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}
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public void poll(ByteBuffer keyDownBuffer) {
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int old_position = keyDownBuffer.position();
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keyDownBuffer.put(key_down_buffer);
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keyDownBuffer.position(old_position);
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}
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private void translate(int virt_key, byte state, long nanos) {
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int keycode = MapVirtualKey(virt_key, MAPVK_VK_TO_VSC);
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if (state != 0) {
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if (virt_key != 0 && GetKeyboardState(keyboard_state) != 0) {
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// Mark key down in the scan code
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int key_down_code = keycode & 0x7fff;
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int num_chars;
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if (unicode) {
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unicode_buffer.clear();
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num_chars = ToUnicode(virt_key,
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key_down_code,
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keyboard_state,
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unicode_buffer,
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unicode_buffer.capacity(), 0);
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} else {
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ascii_buffer.clear();
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num_chars = ToAscii(virt_key,
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key_down_code,
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keyboard_state,
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ascii_buffer,
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0);
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}
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if (num_chars > 0) {
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int current_char = 0;
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do {
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int char_int;
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if (unicode) {
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char_int = ((int)unicode_buffer.get()) & 0xFFFF;
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} else {
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char_int = ((int)ascii_buffer.get()) & 0xFF;
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}
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if (current_char >= 1) {
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putEvent(0, (byte)0, char_int, nanos);
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} else {
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putEvent(virt_key, state, char_int, nanos);
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}
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current_char++;
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} while (current_char < num_chars);
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} else {
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putEvent(virt_key, state, 0, nanos);
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}
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} else {
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putEvent(virt_key, state, 0, nanos);
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}
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} else {
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putEvent(virt_key, state, 0, nanos);
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}
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}
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private static native int MapVirtualKey(int uCode, int uMapType);
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private static native int ToUnicode(int wVirtKey, int wScanCode, ByteBuffer lpKeyState, CharBuffer pwszBuff, int cchBuff, int flags);
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private static native int ToAscii(int wVirtKey, int wScanCode, ByteBuffer lpKeyState, ByteBuffer lpChar, int flags);
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private static native int GetKeyboardState(ByteBuffer lpKeyState);
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private static native int GetKeyState(int virt_key);
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private void putEvent(int virt_key, byte state, int ch, long nanos) {
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int keycode = WindowsKeycodes.mapVirtualKeyToLWJGLCode(virt_key);
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if (keycode < key_down_buffer.length)
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key_down_buffer[keycode] = state;
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tmp_event.clear();
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tmp_event.putInt(keycode).put(state).putInt(ch).putLong(nanos);
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tmp_event.flip();
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event_queue.putEvent(tmp_event);
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}
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private boolean checkShiftKey(int virt_key, byte state) {
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int key_state = (GetKeyState(virt_key) >>> 15) & 0x1;
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int lwjgl_code = WindowsKeycodes.mapVirtualKeyToLWJGLCode(virt_key);
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return (key_down_buffer[lwjgl_code] == 1 - state) && (key_state == state);
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}
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private int translateShift(int scan_code, byte state) {
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int state_mask = state != 0 ? 0x8000 : 0x0000;
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if (checkShiftKey(WindowsKeycodes.VK_LSHIFT, state)) {
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return WindowsKeycodes.VK_LSHIFT;
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} else if (checkShiftKey(WindowsKeycodes.VK_RSHIFT, state)) {
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return WindowsKeycodes.VK_RSHIFT;
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} else {
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if (scan_code== 0x2A)
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return WindowsKeycodes.VK_LSHIFT;
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else {
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if (scan_code == 0x36)
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return WindowsKeycodes.VK_RSHIFT;
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else
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return WindowsKeycodes.VK_LSHIFT;
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}
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}
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}
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private int translateExtended(int virt_key, int scan_code, byte state, boolean extended) {
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switch (virt_key) {
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case WindowsKeycodes.VK_SHIFT:
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return translateShift(scan_code, state);
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case WindowsKeycodes.VK_CONTROL:
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return extended ? WindowsKeycodes.VK_RCONTROL : WindowsKeycodes.VK_LCONTROL;
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case WindowsKeycodes.VK_MENU:
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return extended ? WindowsKeycodes.VK_RMENU : WindowsKeycodes.VK_LMENU;
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default:
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return virt_key;
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}
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}
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public void handleKey(int virt_key, int scan_code, boolean extended, byte event_state, long millis) {
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if (isWindowsNT())
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virt_key = translateExtended(virt_key, scan_code, event_state, extended);
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translate(virt_key, event_state, millis*1000000);
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}
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public void read(ByteBuffer buffer) {
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event_queue.copyEvents(buffer);
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}
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}
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