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Grab mouse on X11

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This commit is contained in:
Iwan Timmer 2017-05-25 20:36:06 +02:00
parent 8d4670339f
commit a30f0eec05
2 changed files with 44 additions and 11 deletions
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54
src/input/x11.c
View File

@ -27,36 +27,51 @@
#include <X11/Xatom.h> #include <X11/Xatom.h>
#include <X11/Xutil.h> #include <X11/Xutil.h>
#include <stdbool.h>
#include <stdlib.h>
#include <poll.h> #include <poll.h>
#define MODIFIERS (MODIFIER_SHIFT|MODIFIER_ALT|MODIFIER_CTRL)
static Display *display; static Display *display;
static Window window;
static Atom wm_deletemessage; static Atom wm_deletemessage;
static int last_x = -1, last_y = -1; static int last_x = -1, last_y = -1;
static int keyboard_modifiers; static int keyboard_modifiers;
static const char data[1] = {0};
static Cursor cursor;
static bool grabbed = True;
static int x11_handler(int fd) { static int x11_handler(int fd) {
XEvent event; XEvent event;
int button = 0; int button = 0;
int motion_x, motion_y;
XNextEvent(display, &event); XNextEvent(display, &event);
switch (event.type) { switch (event.type) {
case KeyPress: case KeyPress:
case KeyRelease: case KeyRelease:
if (event.xkey.keycode >= 8 && event.xkey.keycode < (sizeof(keyCodes)/sizeof(keyCodes[0]) + 8)) { if (event.xkey.keycode >= 8 && event.xkey.keycode < (sizeof(keyCodes)/sizeof(keyCodes[0]) + 8)) {
if ((keyboard_modifiers & MODIFIERS) == MODIFIERS && event.type == KeyRelease) {
grabbed = !grabbed;
XDefineCursor(display, window, grabbed ? cursor : NULL);
}
int modifier = 0; int modifier = 0;
switch (event.xkey.keycode) { switch (event.xkey.keycode) {
case XK_Shift_R: case 0x32:
case XK_Shift_L: case 0x3e:
modifier = MODIFIER_SHIFT; modifier = MODIFIER_SHIFT;
break; break;
case XK_Alt_R: case 0x40:
case XK_Alt_L: case 0x6c:
modifier = MODIFIER_ALT; modifier = MODIFIER_ALT;
break; break;
case XK_Control_R: case 0x25:
case XK_Control_L: case 0x69:
modifier = MODIFIER_CTRL; modifier = MODIFIER_CTRL;
break; break;
} }
@ -90,11 +105,18 @@ static int x11_handler(int fd) {
LiSendMouseButtonEvent(event.type==ButtonPress ? BUTTON_ACTION_PRESS : BUTTON_ACTION_RELEASE, button); LiSendMouseButtonEvent(event.type==ButtonPress ? BUTTON_ACTION_PRESS : BUTTON_ACTION_RELEASE, button);
break; break;
case MotionNotify: case MotionNotify:
if (last_x >= 0 && last_y >= 0) { motion_x = event.xmotion.x - last_x;
LiSendMouseMoveEvent(event.xmotion.x - last_x, event.xmotion.y - last_y); motion_y = event.xmotion.y - last_y;
if (abs(motion_x) > 0 || abs(motion_y) > 0) {
if (last_x >= 0 && last_y >= 0)
LiSendMouseMoveEvent(motion_x, motion_y);
if (grabbed)
XWarpPointer(display, None, window, 0, 0, 0, 0, 640, 360);
} }
last_x = event.xmotion.x;
last_y = event.xmotion.y; last_x = grabbed ? 640 : event.xmotion.x;
last_y = grabbed ? 360 : event.xmotion.y;
break; break;
case ClientMessage: case ClientMessage:
if (event.xclient.data.l[0] == wm_deletemessage) if (event.xclient.data.l[0] == wm_deletemessage)
@ -102,13 +124,23 @@ static int x11_handler(int fd) {
break; break;
} }
return LOOP_OK;
} }
void x11_input_init(Display* x11_display, Window window) { void x11_input_init(Display* x11_display, Window x11_window) {
display = x11_display; display = x11_display;
window = x11_window;
wm_deletemessage = XInternAtom(display, "WM_DELETE_WINDOW", False); wm_deletemessage = XInternAtom(display, "WM_DELETE_WINDOW", False);
XSetWMProtocols(display, window, &wm_deletemessage, 1); XSetWMProtocols(display, window, &wm_deletemessage, 1);
/* make a blank cursor */
XColor dummy;
Pixmap blank = XCreateBitmapFromData(display, window, data, 1, 1);
cursor = XCreatePixmapCursor(display, blank, blank, &dummy, &dummy, 0, 0);
XFreePixmap(display, blank);
XDefineCursor(display, window, cursor);
loop_add_fd(ConnectionNumber(display), x11_handler, POLLIN | POLLERR | POLLHUP); loop_add_fd(ConnectionNumber(display), x11_handler, POLLIN | POLLERR | POLLHUP);
} }

1
src/video/x11.c
View File

@ -51,6 +51,7 @@ void x11_setup(int videoFormat, int width, int height, int redrawRate, void* con
exit(1); exit(1);
} }
XInitThreads();
display = XOpenDisplay(NULL); display = XOpenDisplay(NULL);
if (!display) { if (!display) {
fprintf(stderr, "Error: failed to open X display.\n"); fprintf(stderr, "Error: failed to open X display.\n");