/*
* Copyright (c) 2002-2008 LWJGL Project
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*
* * Redistributions in binary form must reproduce the above copyright
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* documentation and/or other materials provided with the distribution.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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package org.lwjgl.opengl;
/**
* This is the Windows implementation of the Mouse.
* @author elias_naur
*/
import java.nio.ByteBuffer;
import java.nio.IntBuffer;
import org.lwjgl.BufferUtils;
import org.lwjgl.LWJGLException;
import org.lwjgl.LWJGLUtil;
import org.lwjgl.input.Mouse;
final class WindowsMouse {
private final long hwnd;
private final int mouse_button_count;
private final boolean has_wheel;
private final EventQueue event_queue = new EventQueue(Mouse.EVENT_SIZE);
private final ByteBuffer mouse_event = ByteBuffer.allocate(Mouse.EVENT_SIZE);
private final Object blank_cursor;
private boolean mouse_grabbed;
private byte[] button_states;
private int accum_dx;
private int accum_dy;
private int accum_dwheel;
private int last_x;
private int last_y;
WindowsMouse(long hwnd) throws LWJGLException {
this.hwnd = hwnd;
this.mouse_button_count = WindowsDisplay.getSystemMetrics(WindowsDisplay.SM_CMOUSEBUTTONS);
this.has_wheel = WindowsDisplay.getSystemMetrics(WindowsDisplay.SM_MOUSEWHEELPRESENT) != 0;
this.blank_cursor = createBlankCursor();
this.button_states = new byte[mouse_button_count];
}
private Object createBlankCursor() throws LWJGLException {
int width = WindowsDisplay.getSystemMetrics(WindowsDisplay.SM_CXCURSOR);
int height = WindowsDisplay.getSystemMetrics(WindowsDisplay.SM_CYCURSOR);
IntBuffer pixels = BufferUtils.createIntBuffer(width*height);
return WindowsDisplay.doCreateCursor(width, height, 0, 0, 1, pixels, null);
}
public boolean isGrabbed() {
return mouse_grabbed;
}
public boolean hasWheel() {
return has_wheel;
}
public int getButtonCount() {
return mouse_button_count;
}
public void poll(IntBuffer coord_buffer, ByteBuffer buttons) {
for (int i = 0; i < coord_buffer.remaining(); i++)
coord_buffer.put(coord_buffer.position() + i, 0);
int num_buttons = mouse_button_count;
coord_buffer.put(coord_buffer.position() + 2, accum_dwheel);
if (num_buttons > button_states.length)
num_buttons = button_states.length;
for (int j = 0; j < num_buttons; j++) {
buttons.put(buttons.position() + j, button_states[j]);
}
if (isGrabbed()) {
coord_buffer.put(coord_buffer.position() + 0, accum_dx);
coord_buffer.put(coord_buffer.position() + 1, accum_dy);
} else {
coord_buffer.put(coord_buffer.position() + 0, last_x);
coord_buffer.put(coord_buffer.position() + 1, last_y);
}
accum_dx = accum_dy = accum_dwheel = 0;
}
private void putMouseEventWithCoords(byte button, byte state, int coord1, int coord2, int dz, long nanos) {
mouse_event.clear();
mouse_event.put(button).put(state).putInt(coord1).putInt(coord2).putInt(dz).putLong(nanos);
mouse_event.flip();
event_queue.putEvent(mouse_event);
}
private void putMouseEvent(byte button, byte state, int dz, long nanos) {
if (mouse_grabbed)
putMouseEventWithCoords(button, state, 0, 0, dz, nanos);
else
putMouseEventWithCoords(button, state, last_x, last_y, dz, nanos);
}
public void read(ByteBuffer buffer) {
event_queue.copyEvents(buffer);
}
public Object getBlankCursor() {
return blank_cursor;
}
public void grab(boolean grab, boolean should_center) {
if (grab) {
if (!mouse_grabbed) {
mouse_grabbed = true;
if (should_center) {
try {
WindowsDisplay.setupCursorClipping(hwnd);
} catch (LWJGLException e) {
LWJGLUtil.log("Failed to setup cursor clipping: " + e);
}
centerCursor();
}
}
} else {
if (mouse_grabbed) {
mouse_grabbed = false;
WindowsDisplay.resetCursorClipping();
}
}
event_queue.clearEvents();
}
public void handleMouseScrolled(int event_dwheel, long millis) {
accum_dwheel += event_dwheel;
putMouseEvent((byte)-1, (byte)0, event_dwheel, millis*1000000);
}
private void centerCursor() {
WindowsDisplay.centerCursor(hwnd);
}
public void setPosition(int x, int y) {
this.last_x = x;
this.last_y = y;
}
public void destroy() {
WindowsDisplay.doDestroyCursor(blank_cursor);
}
public void handleMouseMoved(int x, int y, long millis, boolean should_center) {
int dx = x - last_x;
int dy = y - last_y;
if (dx != 0 || dy != 0) {
accum_dx += dx;
accum_dy += dy;
last_x = x;
last_y = y;
long nanos = millis*1000000;
if (mouse_grabbed) {
putMouseEventWithCoords((byte)-1, (byte)0, dx, dy, 0, nanos);
if (should_center)
centerCursor();
} else {
putMouseEventWithCoords((byte)-1, (byte)0, x, y, 0, nanos);
}
}
}
public void handleMouseButton(byte button, byte state, long millis) {
putMouseEvent(button, state, 0, millis*1000000);
if (button < button_states.length)
button_states[button] = state != 0 ? (byte)1 : (byte)0;
}
}