298 lines
8.4 KiB
C++
298 lines
8.4 KiB
C++
/*
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* Copyright (c) 2002 Light Weight Java Game Library 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 'Light Weight Java Game Library' 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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/**
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* $Id$
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*
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* Linux mouse handling.
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*
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* @author elias_naur <elias_naur@users.sourceforge.net>
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* @version $Revision$
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*/
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#include <X11/X.h>
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#include <X11/Xlib.h>
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#include <X11/extensions/xf86vmode.h>
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#include <assert.h>
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#include <string.h>
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#include <Window.h>
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#include "org_lwjgl_input_Mouse.h"
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#define NUM_BUTTONS 3
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#define POINTER_WARP_BORDER 10
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#define WARP_RETRY 5
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// scale the mouse wheel according to win32
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#define WHEEL_SCALE 120
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static bool pointer_grabbed;
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static bool created = false;
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static bool should_grab = false;
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static jfieldID fid_has_wheel = NULL;
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static jfieldID fid_button_count = NULL;
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static jfieldID fid_buttons = NULL;
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static jfieldID fid_dx = NULL;
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static jfieldID fid_dy = NULL;
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static jfieldID fid_dwheel = NULL;
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static int last_x;
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static int last_y;
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static int last_z;
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static int current_x;
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static int current_y;
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static int current_z;
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static unsigned char buttons[NUM_BUTTONS];
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static Cursor blank_cursor;
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/*
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* Class: org_lwjgl_input_Mouse
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* Method: initIDs
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* Signature: ()V
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*/
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JNIEXPORT void JNICALL Java_org_lwjgl_input_Mouse_initIDs
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(JNIEnv * env, jclass clazz)
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{
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if (fid_has_wheel == NULL)
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fid_has_wheel = env->GetStaticFieldID(clazz, "hasWheel", "Z");
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if (fid_button_count == NULL)
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fid_button_count = env->GetStaticFieldID(clazz, "buttonCount", "I");
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if (fid_buttons == NULL)
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fid_buttons = env->GetStaticFieldID(clazz, "buttons", "[Z");
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if (fid_dx == NULL)
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fid_dx = env->GetStaticFieldID(clazz, "dx", "I");
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if (fid_dy == NULL)
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fid_dy = env->GetStaticFieldID(clazz, "dy", "I");
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if (fid_dwheel == NULL)
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fid_dwheel = env->GetStaticFieldID(clazz, "dwheel", "I");
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}
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static int blankCursor(void) {
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unsigned int best_width, best_height;
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if (XQueryBestCursor(getCurrentDisplay(), getCurrentWindow(), 1, 1, &best_width, &best_height) == 0) {
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#ifdef _DEBUG
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printf("Could not query best cursor size\n");
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#endif
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return 0;
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}
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Pixmap mask = XCreatePixmap(getCurrentDisplay(), getCurrentWindow(), best_width, best_height, 1);
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XGCValues gc_values;
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gc_values.foreground = 0;
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GC gc = XCreateGC(getCurrentDisplay(), mask, GCForeground, &gc_values);
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XFillRectangle(getCurrentDisplay(), mask, gc, 0, 0, best_width, best_height);
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XFreeGC(getCurrentDisplay(), gc);
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XColor dummy_color;
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blank_cursor = XCreatePixmapCursor(getCurrentDisplay(), mask, mask, &dummy_color, &dummy_color, 0, 0);
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XFreePixmap(getCurrentDisplay(), mask);
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return 1;
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}
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static int grabPointer(void) {
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int result;
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int mask = FocusChangeMask | PointerMotionMask | ButtonPressMask | ButtonReleaseMask;
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result = XGrabPointer(getCurrentDisplay(), getCurrentWindow(), False, mask, GrabModeAsync, GrabModeAsync, getCurrentWindow(), blank_cursor, CurrentTime);
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XWarpPointer(getCurrentDisplay(), None, getCurrentWindow(), 0, 0, 0, 0, current_x, current_y);
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XF86VidModeSetViewPort(getCurrentDisplay(), getCurrentScreen(), 0, 0); // make sure we have a centered window
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if (result == GrabSuccess)
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pointer_grabbed = true;
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return result;
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}
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static void ungrabPointer(void) {
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pointer_grabbed = false;
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XUngrabPointer(getCurrentDisplay(), CurrentTime);
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}
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void acquirePointer(void) {
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if (!created)
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return;
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should_grab = true;
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}
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void releasePointer(void) {
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if (!created)
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return;
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should_grab = false;
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}
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static void updateGrab(void) {
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if (should_grab) {
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if (!pointer_grabbed)
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grabPointer();
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} else {
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if (pointer_grabbed)
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ungrabPointer();
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}
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}
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/*
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* Class: org_lwjgl_input_Mouse
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* Method: nCreate
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* Signature: ()Z
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*/
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JNIEXPORT jboolean JNICALL Java_org_lwjgl_input_Mouse_nCreate
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(JNIEnv * env, jclass clazz)
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{
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int i;
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env->SetStaticIntField(clazz, fid_button_count, NUM_BUTTONS);
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env->SetStaticBooleanField(clazz, fid_has_wheel, JNI_TRUE);
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current_x = current_y = current_z = last_x = last_y = last_z = pointer_grabbed = 0;
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for (i = 0; i < NUM_BUTTONS; i++)
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buttons[i] = JNI_FALSE;
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if (!blankCursor()) {
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#ifdef _DEBUG
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printf("Could create blank cursor\n");
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#endif
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return JNI_FALSE;
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}
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created = true;
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should_grab = true;
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updateGrab();
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return JNI_TRUE;
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}
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/*
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* Class: org_lwjgl_input_Mouse
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* Method: nDestroy
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* Signature: ()V
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*/
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JNIEXPORT void JNICALL Java_org_lwjgl_input_Mouse_nDestroy
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(JNIEnv * env, jclass clazz)
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{
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if (pointer_grabbed)
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ungrabPointer();
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XFreeCursor(getCurrentDisplay(), blank_cursor);
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created = false;
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should_grab = false;
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}
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void handleButtonPress(XButtonEvent *event) {
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switch (event->button) {
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case Button1:
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buttons[0] = JNI_TRUE;
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break;
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case Button2:
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buttons[2] = JNI_TRUE;
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break;
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case Button3:
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buttons[1] = JNI_TRUE;
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break;
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case Button4:
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current_z += WHEEL_SCALE;
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break;
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case Button5:
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current_z -= WHEEL_SCALE;
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break;
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default: assert(0);
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}
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}
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void handleButtonRelease(XButtonEvent *event) {
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switch (event->button) {
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case Button1:
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buttons[0] = JNI_FALSE;
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break;
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case Button2:
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buttons[2] = JNI_FALSE;
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break;
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case Button3:
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buttons[1] = JNI_FALSE;
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break;
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case Button4: /* Fall through */
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case Button5:
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break;
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default: assert(0);
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}
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}
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void handlePointerMotion(XMotionEvent *event) {
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current_x = event->x;
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current_y = event->y;
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}
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static void warpPointer(void) {
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int i;
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if (!pointer_grabbed)
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return;
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// Reset pointer to middle of screen if inside a certain inner border
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if (current_x < POINTER_WARP_BORDER || current_y < POINTER_WARP_BORDER ||
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current_x > getWindowWidth() - POINTER_WARP_BORDER || current_y > getWindowHeight() - POINTER_WARP_BORDER) {
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current_x = last_x = getWindowWidth()/2;
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current_y = last_y = getWindowHeight()/2;
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XWarpPointer(getCurrentDisplay(), None, getCurrentWindow(), 0, 0, 0, 0, current_x, current_y);
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XEvent event;
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// Try to catch the warp pointer event
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for (i = 0; i < WARP_RETRY; i++) {
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XMaskEvent(getCurrentDisplay(), PointerMotionMask, &event);
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if (event.xmotion.x > current_x - POINTER_WARP_BORDER &&
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event.xmotion.x < current_x + POINTER_WARP_BORDER &&
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event.xmotion.y > current_y - POINTER_WARP_BORDER &&
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event.xmotion.y < current_y + POINTER_WARP_BORDER)
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break;
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#ifdef _DEBUG
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printf("Skipped event searching for warp event %d, %d\n", event.xmotion.x, event.xmotion.y);
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#endif
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}
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#ifdef _DEBUG
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if (i == WARP_RETRY)
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printf("Never got warp event\n");
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#endif
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}
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}
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/*
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* Class: org_lwjgl_input_Mouse
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* Method: nPoll
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* Signature: ()V
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*/
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JNIEXPORT void JNICALL Java_org_lwjgl_input_Mouse_nPoll
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(JNIEnv * env, jclass clazz)
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{
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updateGrab();
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int moved_x = current_x - last_x;
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int moved_y = current_y - last_y;
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int moved_z = current_z - last_z;
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env->SetStaticIntField(clazz, fid_dx, (jint)moved_x);
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env->SetStaticIntField(clazz, fid_dy, (jint)moved_y);
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env->SetStaticIntField(clazz, fid_dwheel, (jint)moved_z);
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last_x = current_x;
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last_y = current_y;
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last_z = current_z;
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jbooleanArray buttons_array = (jbooleanArray)env->GetStaticObjectField(clazz, fid_buttons);
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env->SetBooleanArrayRegion(buttons_array, 0, NUM_BUTTONS, buttons);
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warpPointer();
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}
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