319 lines
10 KiB
Java
319 lines
10 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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* @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 org.lwjgl.BufferUtils;
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import org.lwjgl.LWJGLException;
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import org.lwjgl.input.Mouse;
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final class LinuxMouse {
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private static final int POINTER_WARP_BORDER = 10;
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// scale the mouse wheel according to DirectInput
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private static final int WHEEL_SCALE = 120;
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private int button_count;
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/* X11 constants */
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private static final int Button1 = 1;
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private static final int Button2 = 2;
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private static final int Button3 = 3;
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private static final int Button4 = 4;
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private static final int Button5 = 5;
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private static final int Button6 = 6; // wheel tilt left *rare*
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private static final int Button7 = 7; // wheel tilt right *rare*
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private static final int Button8 = 8; // back button
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private static final int Button9 = 9; // forward button
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private static final int ButtonPress = 4;
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private static final int ButtonRelease = 5;
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private final long display;
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private final long window;
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private final long input_window;
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private final long warp_atom;
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private final IntBuffer query_pointer_buffer = BufferUtils.createIntBuffer(4);
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private final ByteBuffer event_buffer = ByteBuffer.allocate(Mouse.EVENT_SIZE);
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private int last_x;
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private int last_y;
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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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private byte[] buttons;
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private EventQueue event_queue;
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private long last_event_nanos;
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LinuxMouse(long display, long window, long input_window) throws LWJGLException {
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this.display = display;
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this.window = window;
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this.input_window = input_window;
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this.warp_atom = LinuxDisplay.nInternAtom(display, "_LWJGL", false);
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button_count = nGetButtonCount(display);
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buttons = new byte[button_count];
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reset(false, false);
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}
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private void reset(boolean grab, boolean warp_pointer) {
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event_queue = new EventQueue(event_buffer.capacity());
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accum_dx = accum_dy = 0;
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long root_window = nQueryPointer(display, window, query_pointer_buffer);
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int root_x = query_pointer_buffer.get(0);
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int root_y = query_pointer_buffer.get(1);
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int win_x = query_pointer_buffer.get(2);
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int win_y = query_pointer_buffer.get(3);
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// Pretend that the cursor never moved
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last_x = win_x;
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last_y = transformY(win_y);
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doHandlePointerMotion(grab, warp_pointer, root_window, root_x, root_y, win_x, win_y, last_event_nanos);
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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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public void poll(boolean grab, IntBuffer coord_buffer, ByteBuffer buttons_buffer) {
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if (grab) {
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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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for (int i = 0; i < buttons.length; i++)
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buttons_buffer.put(i, buttons[i]);
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}
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private void putMouseEventWithCoords(byte button, byte state, int coord1, int coord2, int dz, long nanos) {
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event_buffer.clear();
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event_buffer.put(button).put(state).putInt(coord1).putInt(coord2).putInt(dz).putLong(nanos);
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event_buffer.flip();
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event_queue.putEvent(event_buffer);
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last_event_nanos = nanos;
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}
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private void setCursorPos(boolean grab, int x, int y, long nanos) {
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y = transformY(y);
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int dx = x - last_x;
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int dy = y - last_y;
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if (dx != 0 || dy != 0) {
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accum_dx += dx;
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accum_dy += dy;
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last_x = x;
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last_y = y;
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if (grab) {
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putMouseEventWithCoords((byte)-1, (byte)0, dx, dy, 0, nanos);
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} else {
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putMouseEventWithCoords((byte)-1, (byte)0, x, y, 0, nanos);
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}
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}
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}
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private void doWarpPointer(int center_x, int center_y) {
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nSendWarpEvent(display, input_window, warp_atom, center_x, center_y);
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nWarpCursor(display, window, center_x, center_y);
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}
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private static native void nSendWarpEvent(long display, long window, long warp_atom, int center_x, int center_y);
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private void doHandlePointerMotion(boolean grab, boolean warp_pointer, long root_window, int root_x, int root_y, int win_x, int win_y, long nanos) {
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setCursorPos(grab, win_x, win_y, nanos);
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if (!warp_pointer)
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return;
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int root_window_height = nGetWindowHeight(display, root_window);
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int root_window_width = nGetWindowWidth(display, root_window);
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int window_height = nGetWindowHeight(display, window);
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int window_width = nGetWindowWidth(display, window);
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// find the window position in root coordinates
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int win_left = root_x - win_x;
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int win_top = root_y - win_y;
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int win_right = win_left + window_width;
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int win_bottom = win_top + window_height;
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// cap the window position to the screen dimensions
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int border_left = Math.max(0, win_left);
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int border_top = Math.max(0, win_top);
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int border_right = Math.min(root_window_width, win_right);
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int border_bottom = Math.min(root_window_height, win_bottom);
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// determine whether the cursor is outside the bounds
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boolean outside_limits = root_x < border_left + POINTER_WARP_BORDER || root_y < border_top + POINTER_WARP_BORDER ||
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root_x > border_right - POINTER_WARP_BORDER || root_y > border_bottom - POINTER_WARP_BORDER;
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if (outside_limits) {
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// Find the center of the limits in window coordinates
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int center_x = (border_right - border_left)/2;
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int center_y = (border_bottom - border_top)/2;
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doWarpPointer(center_x, center_y);
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}
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}
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public void changeGrabbed(boolean grab, boolean warp_pointer) {
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reset(grab, warp_pointer);
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}
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public int getButtonCount() {
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return buttons.length;
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}
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private int transformY(int y) {
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return nGetWindowHeight(display, window) - 1 - y;
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}
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private static native int nGetWindowHeight(long display, long window);
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private static native int nGetWindowWidth(long display, long window);
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private static native int nGetButtonCount(long display);
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private static native long nQueryPointer(long display, long window, IntBuffer result);
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public void setCursorPosition(int x, int y) {
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nWarpCursor(display, window, x, transformY(y));
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}
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private static native void nWarpCursor(long display, long window, int x, int y);
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private void handlePointerMotion(boolean grab, boolean warp_pointer, long millis, long root_window, int x_root, int y_root, int x, int y) {
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doHandlePointerMotion(grab, warp_pointer, root_window, x_root, y_root, x, y, millis*1000000);
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}
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private void handleButton(boolean grab, int button, byte state, long nanos) {
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byte button_num;
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switch (button) {
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case Button1:
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button_num = (byte)0;
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break;
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case Button2:
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button_num = (byte)2;
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break;
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case Button3:
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button_num = (byte)1;
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break;
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case Button6:
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button_num = (byte)5;
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break;
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case Button7:
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button_num = (byte)6;
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break;
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case Button8:
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button_num = (byte)3; // back button
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break;
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case Button9:
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button_num = (byte)4; // forward button
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break;
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default:
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if (button > Button9 && button <= button_count) {
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button_num = (byte)(button-1);
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break;
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}
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return;
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}
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buttons[button_num] = state;
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putMouseEvent(grab, button_num, state, 0, nanos);
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}
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private void putMouseEvent(boolean grab, byte button, byte state, int dz, long nanos) {
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if (grab)
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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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private void handleButtonPress(boolean grab, byte button, long nanos) {
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int delta = 0;
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switch (button) {
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case Button4:
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delta = WHEEL_SCALE;
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putMouseEvent(grab, (byte)-1, (byte)0, delta, nanos);
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accum_dz += delta;
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break;
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case Button5:
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delta = -WHEEL_SCALE;
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putMouseEvent(grab, (byte)-1, (byte)0, delta, nanos);
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accum_dz += delta;
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break;
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default:
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handleButton(grab, button, (byte)1, nanos);
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break;
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}
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}
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private void handleButtonEvent(boolean grab, long millis, int type, byte button) {
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long nanos = millis*1000000;
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switch (type) {
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case ButtonRelease:
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handleButton(grab, button, (byte)0, nanos);
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break;
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case ButtonPress:
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handleButtonPress(grab, button, nanos);
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break;
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default:
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break;
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}
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}
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private void resetCursor(int x, int y) {
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last_x = x;
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last_y = transformY(y);
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}
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private void handleWarpEvent(int x, int y) {
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resetCursor(x, y);
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}
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public boolean filterEvent(boolean grab, boolean warp_pointer, LinuxEvent event) {
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switch (event.getType()) {
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case LinuxEvent.ClientMessage:
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if (event.getClientMessageType() == warp_atom) {
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handleWarpEvent(event.getClientData(0), event.getClientData(1));
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return true;
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}
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break;
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case LinuxEvent.ButtonPress: /* Fall through */
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case LinuxEvent.ButtonRelease:
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handleButtonEvent(grab, event.getButtonTime(), event.getButtonType(), (byte)event.getButtonButton());
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return true;
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case LinuxEvent.MotionNotify:
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handlePointerMotion(grab, warp_pointer, event.getButtonTime(), event.getButtonRoot(), event.getButtonXRoot(), event.getButtonYRoot(), event.getButtonX(), event.getButtonY());
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return true;
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default:
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break;
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}
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return false;
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}
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}
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