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Patched SDL_x11events.c with mouse wheel support

SDL_x11events.c (text/x-csrc), 20.93 KB, created by Matthias on 2011-03-20 23:07:02 UTC

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Description:

Filename:

MIME Type:

Creator: Matthias

Created: 2011-03-20 23:07:02 UTC

Size: 20.93 KB

patch

obsolete

>/*
>    SDL - Simple DirectMedia Layer
>    Copyright (C) 1997-2011 Sam Lantinga
>
>    This library is free software; you can redistribute it and/or
>    modify it under the terms of the GNU Lesser General Public
>    License as published by the Free Software Foundation; either
>    version 2.1 of the License, or (at your option) any later version.
>
>    This library is distributed in the hope that it will be useful,
>    but WITHOUT ANY WARRANTY; without even the implied warranty of
>    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
>    Lesser General Public License for more details.
>
>    You should have received a copy of the GNU Lesser General Public
>    License along with this library; if not, write to the Free Software
>    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
>
>    Sam Lantinga
>    slouken@libsdl.org
>*/
>#include "SDL_config.h"
>
>#if SDL_VIDEO_DRIVER_X11
>
>#include <sys/types.h>
>#include <sys/time.h>
>#include <signal.h>
>#include <unistd.h>
>#include <limits.h> /* For INT_MAX */
>
>#include "SDL_x11video.h"
>#include "SDL_x11touch.h"
>#include "../../events/SDL_events_c.h"
>#include "../../events/SDL_mouse_c.h"
>#include "../../events/SDL_touch_c.h"
>
>#include "SDL_timer.h"
>#include "SDL_syswm.h"
>
>#include <stdio.h>
>
>#ifdef SDL_INPUT_LINUXEV
>//Touch Input/event* includes
>#include <linux/input.h>
>#include <fcntl.h>
>#endif
>/*#define DEBUG_XEVENTS*/
>
>/* Check to see if this is a repeated key.
>   (idea shamelessly lifted from GII -- thanks guys! :)
> */
>static SDL_bool X11_KeyRepeat(Display *display, XEvent *event)
>{
>    XEvent peekevent;
>
>    if (XPending(display)) {
>        XPeekEvent(display, &peekevent);
>        if ((peekevent.type == KeyPress) &&
>            (peekevent.xkey.keycode == event->xkey.keycode) &&
>            ((peekevent.xkey.time-event->xkey.time) < 2)) {
>            return SDL_TRUE;
>        }
>    }
>    return SDL_FALSE;
>}
>
>static SDL_bool X11_IsWheelEvent(Display * display,XEvent * event,int * ticks)
>{
>    XEvent peekevent;
>    if (XPending(display)) {
>        /* according to the xlib docs, no specific mouse wheel events exist.
>           however, mouse wheel events trigger a button press and a button release
>           immediately. thus, checking if the same button was released at the same
>           time as it was pressed, should be an adequate hack to derive a mouse 
>           wheel event. */
>        XPeekEvent(display,&peekevent);
>        if ((peekevent.type           == ButtonRelease) &&
>            (peekevent.xbutton.button == event->xbutton.button) &&
>            (peekevent.xbutton.time   == event->xbutton.time)) {
>
>            /* by default, X11 only knows 5 buttons. on most 3 button + wheel mouse,
>               Button4 maps to wheel up, Button5 maps to wheel down. */
>            if (event->xbutton.button == Button4) {
>                *ticks = 1;
>            }
>            else {
>                *ticks = -1;
>            }
>
>            /* remove the following release event, as this is now a wheel event */
>            XNextEvent(display,&peekevent);
>            return SDL_TRUE;
>        }
>    }
>    return SDL_FALSE;
>}
>
>static void
>X11_DispatchEvent(_THIS)
>{
>    SDL_VideoData *videodata = (SDL_VideoData *) _this->driverdata;
>    Display *display = videodata->display;
>    SDL_WindowData *data;
>    XEvent xevent;
>    int i;
>
>    SDL_zero(xevent);           /* valgrind fix. --ryan. */
>    XNextEvent(display, &xevent);
>
>    /* filter events catchs XIM events and sends them to the correct
>       handler */
>    if (XFilterEvent(&xevent, None) == True) {
>#if 0
>        printf("Filtered event type = %d display = %d window = %d\n",
>               xevent.type, xevent.xany.display, xevent.xany.window);
>#endif
>        return;
>    }
>
>    /* Send a SDL_SYSWMEVENT if the application wants them */
>    if (SDL_GetEventState(SDL_SYSWMEVENT) == SDL_ENABLE) {
>        SDL_SysWMmsg wmmsg;
>
>        SDL_VERSION(&wmmsg.version);
>        wmmsg.subsystem = SDL_SYSWM_X11;
>        wmmsg.msg.x11.event = xevent;
>        SDL_SendSysWMEvent(&wmmsg);
>    }
>
>    data = NULL;
>    if (videodata && videodata->windowlist) {
>        for (i = 0; i < videodata->numwindows; ++i) {
>            if ((videodata->windowlist[i] != NULL) &&
>                (videodata->windowlist[i]->xwindow == xevent.xany.window)) {
>                data = videodata->windowlist[i];
>                break;
>            }
>        }
>    }
>    if (!data) {
>        return;
>    }
>
>#if 0
>    printf("type = %d display = %d window = %d\n",
>           xevent.type, xevent.xany.display, xevent.xany.window);
>#endif
>    switch (xevent.type) {
>
>        /* Gaining mouse coverage? */
>    case EnterNotify:{
>#ifdef DEBUG_XEVENTS
>            printf("EnterNotify! (%d,%d,%d)\n", 
>                   xevent.xcrossing.x,
>                   xevent.xcrossing.y,
>                   xevent.xcrossing.mode);
>            if (xevent.xcrossing.mode == NotifyGrab)
>                printf("Mode: NotifyGrab\n");
>            if (xevent.xcrossing.mode == NotifyUngrab)
>                printf("Mode: NotifyUngrab\n");
>#endif
>            SDL_SetMouseFocus(data->window);
>        }
>        break;
>        /* Losing mouse coverage? */
>    case LeaveNotify:{
>#ifdef DEBUG_XEVENTS
>            printf("LeaveNotify! (%d,%d,%d)\n", 
>                   xevent.xcrossing.x,
>                   xevent.xcrossing.y,
>                   xevent.xcrossing.mode);
>            if (xevent.xcrossing.mode == NotifyGrab)
>                printf("Mode: NotifyGrab\n");
>            if (xevent.xcrossing.mode == NotifyUngrab)
>                printf("Mode: NotifyUngrab\n");
>#endif
>            if (xevent.xcrossing.mode != NotifyGrab &&
>                xevent.xcrossing.mode != NotifyUngrab &&
>                xevent.xcrossing.detail != NotifyInferior) {
>                SDL_SetMouseFocus(NULL);
>            }
>        }
>        break;
>
>        /* Gaining input focus? */
>    case FocusIn:{
>#ifdef DEBUG_XEVENTS
>            printf("FocusIn!\n");
>#endif
>            SDL_SetKeyboardFocus(data->window);
>#ifdef X_HAVE_UTF8_STRING
>            if (data->ic) {
>                XSetICFocus(data->ic);
>            }
>#endif
>        }
>        break;
>
>        /* Losing input focus? */
>    case FocusOut:{
>#ifdef DEBUG_XEVENTS
>            printf("FocusOut!\n");
>#endif
>            SDL_SetKeyboardFocus(NULL);
>#ifdef X_HAVE_UTF8_STRING
>            if (data->ic) {
>                XUnsetICFocus(data->ic);
>            }
>#endif
>        }
>        break;
>
>        /* Generated upon EnterWindow and FocusIn */
>    case KeymapNotify:{
>#ifdef DEBUG_XEVENTS
>            printf("KeymapNotify!\n");
>#endif
>            /* FIXME:
>               X11_SetKeyboardState(SDL_Display, xevent.xkeymap.key_vector);
>             */
>        }
>        break;
>
>        /* Has the keyboard layout changed? */
>    case MappingNotify:{
>#ifdef DEBUG_XEVENTS
>            printf("MappingNotify!\n");
>#endif
>            X11_UpdateKeymap(_this);
>        }
>        break;
>
>        /* Key press? */
>    case KeyPress:{
>            KeyCode keycode = xevent.xkey.keycode;
>            KeySym keysym = NoSymbol;
>            SDL_Scancode scancode;
>            char text[SDL_TEXTINPUTEVENT_TEXT_SIZE];
>            Status status = 0;
>
>#ifdef DEBUG_XEVENTS
>            printf("KeyPress (X11 keycode = 0x%X)\n", xevent.xkey.keycode);
>#endif
>            SDL_SendKeyboardKey(SDL_PRESSED, videodata->key_layout[keycode]);
>#if 1
>            if (videodata->key_layout[keycode] == SDLK_UNKNOWN) {
>                int min_keycode, max_keycode;
>                XDisplayKeycodes(display, &min_keycode, &max_keycode);
>                keysym = XKeycodeToKeysym(display, keycode, 0);
>                fprintf(stderr,
>                        "The key you just pressed is not recognized by SDL. To help get this fixed, please report this to the SDL mailing list <sdl@libsdl.org> X11 KeyCode %d (%d), X11 KeySym 0x%lX (%s).\n",
>                        keycode, keycode - min_keycode, keysym,
>                        XKeysymToString(keysym));
>            }
>#endif
>            /* */
>            SDL_zero(text);
>#ifdef X_HAVE_UTF8_STRING
>            if (data->ic) {
>                Xutf8LookupString(data->ic, &xevent.xkey, text, sizeof(text),
>                                  &keysym, &status);
>            }
>#else
>            XLookupString(&xevent.xkey, text, sizeof(text), &keysym, NULL);
>#endif
>            if (*text) {
>                SDL_SendKeyboardText(text);
>            }
>        }
>        break;
>
>        /* Key release? */
>    case KeyRelease:{
>            KeyCode keycode = xevent.xkey.keycode;
>
>#ifdef DEBUG_XEVENTS
>            printf("KeyRelease (X11 keycode = 0x%X)\n", xevent.xkey.keycode);
>#endif
>            if (X11_KeyRepeat(display, &xevent)) {
>                /* We're about to get a repeated key down, ignore the key up */
>                break;
>            }
>            SDL_SendKeyboardKey(SDL_RELEASED, videodata->key_layout[keycode]);
>        }
>        break;
>
>        /* Have we been iconified? */
>    case UnmapNotify:{
>#ifdef DEBUG_XEVENTS
>            printf("UnmapNotify!\n");
>#endif
>            SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_HIDDEN, 0, 0);
>            SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_MINIMIZED, 0, 0);
>        }
>        break;
>
>        /* Have we been restored? */
>    case MapNotify:{
>#ifdef DEBUG_XEVENTS
>            printf("MapNotify!\n");
>#endif
>            SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_SHOWN, 0, 0);
>            SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_RESTORED, 0, 0);
>        }
>        break;
>
>        /* Have we been resized or moved? */
>    case ConfigureNotify:{
>#ifdef DEBUG_XEVENTS
>            printf("ConfigureNotify! (resize: %dx%d)\n",
>                   xevent.xconfigure.width, xevent.xconfigure.height);
>#endif
>            SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_MOVED,
>                                xevent.xconfigure.x, xevent.xconfigure.y);
>            SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_RESIZED,
>                                xevent.xconfigure.width,
>                                xevent.xconfigure.height);
>        }
>        break;
>
>        /* Have we been requested to quit (or another client message?) */
>    case ClientMessage:{
>            if ((xevent.xclient.format == 32) &&
>                (xevent.xclient.data.l[0] == videodata->WM_DELETE_WINDOW)) {
>
>                SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_CLOSE, 0, 0);
>            }
>        }
>        break;
>
>        /* Do we need to refresh ourselves? */
>    case Expose:{
>#ifdef DEBUG_XEVENTS
>            printf("Expose (count = %d)\n", xevent.xexpose.count);
>#endif
>            SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_EXPOSED, 0, 0);
>        }
>        break;
>
>    case MotionNotify:{
>#ifdef DEBUG_MOTION
>            printf("X11 motion: %d,%d\n", xevent.xmotion.x, xevent.xmotion.y);
>#endif
>            SDL_SendMouseMotion(data->window, 0, xevent.xmotion.x, xevent.xmotion.y);
>        }
>        break;
>
>    case ButtonPress:{
>            int ticks = 0;
>            if (X11_IsWheelEvent(display,&xevent,&ticks) == SDL_TRUE) {
>                SDL_SendMouseWheel(data->window, 0, ticks);
>            }
>            else {
>                SDL_SendMouseButton(data->window, SDL_PRESSED, xevent.xbutton.button);
>            }
>        }
>        break;
>
>    case ButtonRelease:{
>            SDL_SendMouseButton(data->window, SDL_RELEASED, xevent.xbutton.button);
>        }
>        break;
>
>    case PropertyNotify:{
>#ifdef DEBUG_XEVENTS
>            unsigned char *propdata;
>            int status, real_format;
>            Atom real_type;
>            unsigned long items_read, items_left, i;
>
>            char *name = XGetAtomName(display, xevent.xproperty.atom);
>            if (name) {
>                printf("PropertyNotify: %s %s\n", name, (xevent.xproperty.state == PropertyDelete) ? "deleted" : "changed");
>                XFree(name);
>            }
>
>            status = XGetWindowProperty(display, data->xwindow, xevent.xproperty.atom, 0L, 8192L, False, AnyPropertyType, &real_type, &real_format, &items_read, &items_left, &propdata);
>            if (status == Success && items_read > 0) {
>                if (real_type == XA_INTEGER) {
>                    int *values = (int *)propdata;
>
>                    printf("{");
>                    for (i = 0; i < items_read; i++) {
>                        printf(" %d", values[i]);
>                    }
>                    printf(" }\n");
>                } else if (real_type == XA_CARDINAL) {
>                    if (real_format == 32) {
>                        Uint32 *values = (Uint32 *)propdata;
>
>                        printf("{");
>                        for (i = 0; i < items_read; i++) {
>                            printf(" %d", values[i]);
>                        }
>                        printf(" }\n");
>                    } else if (real_format == 16) {
>                        Uint16 *values = (Uint16 *)propdata;
>
>                        printf("{");
>                        for (i = 0; i < items_read; i++) {
>                            printf(" %d", values[i]);
>                        }
>                        printf(" }\n");
>                    } else if (real_format == 8) {
>                        Uint8 *values = (Uint8 *)propdata;
>
>                        printf("{");
>                        for (i = 0; i < items_read; i++) {
>                            printf(" %d", values[i]);
>                        }
>                        printf(" }\n");
>                    }
>                } else if (real_type == XA_STRING ||
>                           real_type == videodata->UTF8_STRING) {
>                    printf("{ \"%s\" }\n", propdata);
>                } else if (real_type == XA_ATOM) {
>                    Atom *atoms = (Atom *)propdata;
>
>                    printf("{");
>                    for (i = 0; i < items_read; i++) {
>                        char *name = XGetAtomName(display, atoms[i]);
>                        if (name) {
>                            printf(" %s", name);
>                            XFree(name);
>                        }
>                    }
>                    printf(" }\n");
>                } else {
>                    char *name = XGetAtomName(display, real_type);
>                    printf("Unknown type: %ld (%s)\n", real_type, name ? name : "UNKNOWN");
>                    if (name) {
>                        XFree(name);
>                    }
>                }
>            }
>#endif
>        }
>        break;
>
>    /* Copy the selection from XA_CUT_BUFFER0 to the requested property */
>    case SelectionRequest: {
>            XSelectionRequestEvent *req;
>            XEvent sevent;
>            int seln_format;
>            unsigned long nbytes;
>            unsigned long overflow;
>            unsigned char *seln_data;
>
>            req = &xevent.xselectionrequest;
>#ifdef DEBUG_XEVENTS
>            printf("SelectionRequest (requestor = %ld, target = %ld)\n",
>                req->requestor, req->target);
>#endif
>
>            SDL_zero(sevent);
>            sevent.xany.type = SelectionNotify;
>            sevent.xselection.selection = req->selection;
>            sevent.xselection.target = None;
>            sevent.xselection.property = None;
>            sevent.xselection.requestor = req->requestor;
>            sevent.xselection.time = req->time;
>            if (XGetWindowProperty(display, DefaultRootWindow(display),
>                    XA_CUT_BUFFER0, 0, INT_MAX/4, False, req->target,
>                    &sevent.xselection.target, &seln_format, &nbytes,
>                    &overflow, &seln_data) == Success) {
>                if (sevent.xselection.target == req->target) {
>                    XChangeProperty(display, req->requestor, req->property,
>                        sevent.xselection.target, seln_format, PropModeReplace,
>                        seln_data, nbytes);
>                    sevent.xselection.property = req->property;
>                }
>                XFree(seln_data);
>            }
>            XSendEvent(display, req->requestor, False, 0, &sevent);
>            XSync(display, False);
>        }
>        break;
>
>    case SelectionNotify: {
>#ifdef DEBUG_XEVENTS
>            printf("SelectionNotify (requestor = %ld, target = %ld)\n",
>                xevent.xselection.requestor, xevent.xselection.target);
>#endif
>            videodata->selection_waiting = SDL_FALSE;
>        }
>        break;
>
>    default:{
>#ifdef DEBUG_XEVENTS
>            printf("Unhandled event %d\n", xevent.type);
>#endif
>        }
>        break;
>    }
>}
>
>/* Ack!  XPending() actually performs a blocking read if no events available */
>static int
>X11_Pending(Display * display)
>{
>    /* Flush the display connection and look to see if events are queued */
>    XFlush(display);
>    if (XEventsQueued(display, QueuedAlready)) {
>        return (1);
>    }
>
>    /* More drastic measures are required -- see if X is ready to talk */
>    {
>        static struct timeval zero_time;        /* static == 0 */
>        int x11_fd;
>        fd_set fdset;
>
>        x11_fd = ConnectionNumber(display);
>        FD_ZERO(&fdset);
>        FD_SET(x11_fd, &fdset);
>        if (select(x11_fd + 1, &fdset, NULL, NULL, &zero_time) == 1) {
>            return (XPending(display));
>        }
>    }
>
>    /* Oh well, nothing is ready .. */
>    return (0);
>}
>
>void
>X11_PumpEvents(_THIS)
>{
>    SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
>
>    /* Update activity every 30 seconds to prevent screensaver */
>    if (_this->suspend_screensaver) {
>        Uint32 now = SDL_GetTicks();
>        if (!data->screensaver_activity ||
>            (int) (now - data->screensaver_activity) >= 30000) {
>            XResetScreenSaver(data->display);
>            data->screensaver_activity = now;
>        }
>    }
>
>    /* Keep processing pending events */
>    while (X11_Pending(data->display)) {
>        X11_DispatchEvent(_this);
>    }
>
>#ifdef SDL_INPUT_LINUXEV
>    /* Process Touch events - TODO When X gets touch support, use that instead*/
>    int i = 0,rd;
>    char name[256];
>    struct input_event ev[64];
>    int size = sizeof (struct input_event);
>
>    for(i = 0;i < SDL_GetNumTouch();++i) {
>	SDL_Touch* touch = SDL_GetTouchIndex(i);
>	if(!touch) printf("Touch %i/%i DNE\n",i,SDL_GetNumTouch());
>	EventTouchData* data;
>	data = (EventTouchData*)(touch->driverdata);
>	if(data == NULL) {
>	  printf("No driver data\n");
>	  continue;
>	}
>	if(data->eventStream <= 0) 
>	    printf("Error: Couldn't open stream\n");
>	rd = read(data->eventStream, ev, size * 64);
>	//printf("Got %i/%i bytes\n",rd,size);
>	if(rd >= size) {
>	    for (i = 0; i < rd / sizeof(struct input_event); i++) {
>		switch (ev[i].type) {
>		case EV_ABS:
>		    //printf("Got position x: %i!\n",data->x);
>		    switch (ev[i].code) {
>			case ABS_X:
>			    data->x = ev[i].value;
>			    break;
>			case ABS_Y:
>			    data->y = ev[i].value;
>			    break;
>			case ABS_PRESSURE:
>			    data->pressure = ev[i].value;
>			    if(data->pressure < 0) data->pressure = 0;
>			    break;
>			case ABS_MISC:
>			    if(ev[i].value == 0)
>			        data->up = SDL_TRUE;			    
>			    break;
>			}
>		    break;
>		case EV_MSC:
>		    if(ev[i].code == MSC_SERIAL)
>			data->finger = ev[i].value;
>		    break;
>		case EV_SYN:
>		  //printf("Id: %i\n",touch->id); 
>		  if(data->up) {
>		      SDL_SendFingerDown(touch->id,data->finger,
>			  	       SDL_FALSE,data->x,data->y,
>				       data->pressure);		    
>		  }
>		  else if(data->x >= 0 || data->y >= 0)
>		    SDL_SendTouchMotion(touch->id,data->finger, 
>					SDL_FALSE,data->x,data->y,
>					data->pressure);
>		  
>		    //printf("Synched: %i tx: %i, ty: %i\n",
>		    //	   data->finger,data->x,data->y);
>		  data->x = -1;
>		  data->y = -1;
>		  data->pressure = -1;
>		  data->finger = 0;
>		  data->up = SDL_FALSE;
>		    
>		  break;		
>		}
>	    }
>	}
>    }
>#endif
>}
>
>/* This is so wrong it hurts */
>#define GNOME_SCREENSAVER_HACK
>#ifdef GNOME_SCREENSAVER_HACK
>#include <unistd.h>
>static pid_t screensaver_inhibit_pid;
>static void
>gnome_screensaver_disable()
>{
>    screensaver_inhibit_pid = fork();
>    if (screensaver_inhibit_pid == 0) {
>        close(0);
>        close(1);
>        close(2);
>        execl("/usr/bin/gnome-screensaver-command",
>              "gnome-screensaver-command",
>              "--inhibit",
>              "--reason",
>              "GNOME screensaver doesn't respect MIT-SCREEN-SAVER", NULL);
>        exit(2);
>    }
>}
>static void
>gnome_screensaver_enable()
>{
>    kill(screensaver_inhibit_pid, 15);
>}
>#endif
>
>void
>X11_SuspendScreenSaver(_THIS)
>{
>#if SDL_VIDEO_DRIVER_X11_XSCRNSAVER
>    SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
>    int dummy;
>    int major_version, minor_version;
>
>    if (SDL_X11_HAVE_XSS) {
>        /* XScreenSaverSuspend was introduced in MIT-SCREEN-SAVER 1.1 */
>        if (!XScreenSaverQueryExtension(data->display, &dummy, &dummy) ||
>            !XScreenSaverQueryVersion(data->display,
>                                      &major_version, &minor_version) ||
>            major_version < 1 || (major_version == 1 && minor_version < 1)) {
>            return;
>        }
>
>        XScreenSaverSuspend(data->display, _this->suspend_screensaver);
>        XResetScreenSaver(data->display);
>    }
>#endif
>
>#ifdef GNOME_SCREENSAVER_HACK
>    if (_this->suspend_screensaver) {
>        gnome_screensaver_disable();
>    } else {
>        gnome_screensaver_enable();
>    }
>#endif
>}
>
>#endif /* SDL_VIDEO_DRIVER_X11 */
>
>/* vi: set ts=4 sw=4 expandtab: */

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We are currently migrating Bugzilla to GitHub issues.Any changes made to the bug tracker now will be lost, so please do not post new bugs or make changes to them.When we're done, all bug URLs will redirect to their equivalent location on the new bug tracker.

We are currently migrating Bugzilla to GitHub issues.
Any changes made to the bug tracker now will be lost, so please do not post new bugs or make changes to them.
When we're done, all bug URLs will redirect to their equivalent location on the new bug tracker.