172 lines
6.5 KiB
Java
172 lines
6.5 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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* 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.CharBuffer;
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import org.lwjgl.LWJGLException;
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import org.lwjgl.input.Keyboard;
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final class WindowsKeyboard {
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private final byte[] key_down_buffer = new byte[Keyboard.KEYBOARD_SIZE];
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private final byte[] virt_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 boolean has_retained_event; // Indicates if we're waiting for a WM_CHAR
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private int retained_key_code;
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private byte retained_state;
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private int retained_char;
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private long retained_millis;
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private boolean retained_repeat;
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WindowsKeyboard() throws LWJGLException {
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}
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private static native boolean isWindowsNT();
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boolean isKeyDown(int lwjgl_keycode) {
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return key_down_buffer[lwjgl_keycode] == 1;
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}
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void poll(ByteBuffer keyDownBuffer) {
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// Handle shift key release while both are pressed.
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// Windows will not send an up event for the first button that was released in this case.
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// There will only be one up event, for the last button only. We handle this problem
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// here, using asynchronous state queries.
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if ( isKeyDown(Keyboard.KEY_LSHIFT) && !isKeyPressedAsync(WindowsKeycodes.VK_LSHIFT) )
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handleKey(WindowsKeycodes.VK_SHIFT, Keyboard.KEY_LSHIFT, false, (byte)0, 0L, false);
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if ( isKeyDown(Keyboard.KEY_RSHIFT) && !isKeyPressedAsync(WindowsKeycodes.VK_RSHIFT) )
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handleKey(WindowsKeycodes.VK_SHIFT, Keyboard.KEY_RSHIFT, false, (byte)0, 0L, false);
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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 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 short GetKeyState(int virt_key);
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private static native short GetAsyncKeyState(int virt_key);
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private void putEvent(int keycode, byte state, int ch, long millis, boolean repeat) {
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tmp_event.clear();
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tmp_event.putInt(keycode).put(state).putInt(ch).putLong(millis*1000000).put(repeat ? (byte)1 : (byte)0);
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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 static int translateExtended(int virt_key, int scan_code, boolean extended) {
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switch (virt_key) {
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case WindowsKeycodes.VK_SHIFT:
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return scan_code == 0x36 ? WindowsKeycodes.VK_RSHIFT : WindowsKeycodes.VK_LSHIFT;
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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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private void flushRetained() {
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if (has_retained_event) {
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has_retained_event = false;
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putEvent(retained_key_code, retained_state, retained_char, retained_millis, retained_repeat);
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}
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}
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private static boolean isKeyPressed(int state) {
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return (state & 1) == 1;
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}
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private static boolean isKeyPressedAsync(int virt_key) {
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return (GetAsyncKeyState(virt_key) & 0x8000) != 0;
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}
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/**
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* This is called when the window loses focus: we release all currently pressed keys. If a key has been pressed (or hasn't been released at all), before we
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* regain focus, we'll start receiving repeat press events. We'll treat the first of those as a non-repeat press.
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*/
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void releaseAll(long millis) {
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for ( int i = 0; i < virt_key_down_buffer.length; i++ ) {
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if ( isKeyPressed(virt_key_down_buffer[i]) ) {
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handleKey(i, 0, false, (byte)0, millis, false);
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}
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}
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}
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void handleKey(int virt_key, int scan_code, boolean extended, byte event_state, long millis, boolean repeat) {
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virt_key = translateExtended(virt_key, scan_code, extended);
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if ( !repeat && isKeyPressed(event_state) == isKeyPressed(virt_key_down_buffer[virt_key]) )
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return;
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flushRetained();
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has_retained_event = true;
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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] = event_state;
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repeat &= isKeyPressed(virt_key_down_buffer[virt_key]); // Treat the first repeat event after releaseAll() as a non-repeat press.
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virt_key_down_buffer[virt_key] = event_state;
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}
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retained_key_code = keycode;
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retained_state = event_state;
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retained_millis = millis;
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retained_char = 0;
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retained_repeat = repeat;
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}
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void handleChar(int event_char, long millis, boolean repeat) {
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if (has_retained_event && retained_char != 0)
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flushRetained();
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if (!has_retained_event) {
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putEvent(0, (byte)0, event_char, millis, repeat);
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} else
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retained_char = event_char;
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}
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void read(ByteBuffer buffer) {
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flushRetained();
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event_queue.copyEvents(buffer);
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}
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}
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