cinelerra-5.1/guicast/bcwindowevents.C

   1
   2 /*
   3  * CINELERRA
   4  * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include "bcdisplay.h"
  23 #include "bcsignals.h"
  24 #include "bcwindowbase.h"
  25 #include "bcwindowevents.h"
  26 #include "bctimer.h"
  27 #include "condition.h"
  28 #include <unistd.h>
  29
  30 BC_WindowEvents::BC_WindowEvents(BC_WindowBase *window)
  31  : Thread(1, 0, 0)
  32 {
  33         this->window = window;
  34         display = 0;
  35         done = 0;
  36 }
  37
  38
  39 BC_WindowEvents::BC_WindowEvents(BC_Display *display)
  40  : Thread(1, 0, 0)
  41 {
  42         this->display = display;
  43         window = 0;
  44         done = 0;
  45 }
  46
  47 BC_WindowEvents::~BC_WindowEvents()
  48 {
  49 // First set done, then send dummy event through XSendEvent to unlock the loop in ::run()
  50 //printf("BC_WindowEvents::~BC_WindowEvents %d %s\n", __LINE__, window->title);
  51         done = 1;
  52         XEvent event;
  53         XClientMessageEvent *ptr = (XClientMessageEvent*)&event;
  54         event.type = ClientMessage;
  55         ptr->message_type = XInternAtom(window->display, "DUMMY_XATOM", False);
  56         ptr->format = 32;
  57         XSendEvent(window->display,
  58                 window->win,
  59                 0,
  60                 0,
  61                 &event);
  62         window->flush();
  63         Thread::join();
  64 //printf("BC_WindowEvents::~BC_WindowEvents %d %s\n", __LINE__, window->title);
  65 }
  66
  67 void BC_WindowEvents::start()
  68 {
  69         done = 0;
  70         Thread::start();
  71 }
  72
  73
  74 void BC_WindowEvents::run()
  75 {
  76 // Can't cancel in XNextEvent because X server never figures out it's not
  77 // listening anymore and XCloseDisplay locks up.
  78         XEvent *event;
  79 #ifndef SINGLE_THREAD
  80         int x_fd = ConnectionNumber(window->display);
  81 #endif
  82
  83
  84
  85         while(!done)
  86         {
  87
  88 // Can't cancel in XNextEvent because X server never figures out it's not
  89 // listening anymore and XCloseDisplay locks up.
  90 #ifdef SINGLE_THREAD
  91                 event = new XEvent;
  92                 XNextEvent(display->display, event);
  93                 display->put_event(event);
  94 #else
  95 // This came from a linuxquestions post.
  96 // We can get a file descriptor for the X display & use select instead of XNextEvent.
  97 // The newest X11 library requires locking the display to use XNextEvent.
  98                 fd_set x_fds;
  99                 FD_ZERO(&x_fds);
 100                 FD_SET(x_fd, &x_fds);
 101                 struct timeval tv;
 102                 tv.tv_sec = 0;  tv.tv_usec = 200000;
 103 //printf("BC_WindowEvents::run %d %s\n", __LINE__, window->title);
 104                 select(x_fd + 1, &x_fds, 0, 0, &tv);
 105                 XLockDisplay(window->display);
 106                 while(!done && XPending(window->display))
 107                 {
 108                         event = new XEvent;
 109                         XNextEvent(window->display, event);
 110                         if( event->type == BC_WindowBase::shm_completion_event ) {
 111                                 window->top_level->active_bitmaps.reque(event);
 112                                 delete event;
 113                                 continue;
 114                         }
 115 // HACK: delay is required to get the close event
 116                         usleep(1);
 117 //if(window && event)
 118 //printf("BC_WindowEvents::run %d %s %d\n", __LINE__, window->title, event->type);
 119                         window->put_event(event);
 120                 }
 121                 XUnlockDisplay(window->display);
 122 //printf("BC_WindowEvents::run %d %s\n", __LINE__, window->title);
 123 #endif
 124         }
 125 }
 126
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