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 // no more external events, send one last event into X to flush out all of the
  50 //  pending events so that no straglers or shm leaks are possible.
  51 //printf("BC_WindowEvents::~BC_WindowEvents %d %s\n", __LINE__, window->title);
  52         XSelectInput(window->display, window->win, 0);
  53         XEvent event;  memset(&event,0,sizeof(event));
  54         XClientMessageEvent *ptr = (XClientMessageEvent*)&event;
  55         event.type = ClientMessage;
  56         ptr->message_type = window->DestroyAtom;
  57         ptr->format = 32;
  58         XSendEvent(window->display, window->win, 0, 0, &event);
  59         window->flush();
  60         Thread::join();
  61 //printf("BC_WindowEvents::~BC_WindowEvents %d %s\n", __LINE__, window->title);
  62 }
  63
  64 void BC_WindowEvents::start()
  65 {
  66         done = 0;
  67         Thread::start();
  68 }
  69
  70
  71 void BC_WindowEvents::run()
  72 {
  73 // Can't cancel in XNextEvent because X server never figures out it's not
  74 // listening anymore and XCloseDisplay locks up.
  75         XEvent *event;
  76 #ifndef SINGLE_THREAD
  77 #ifndef NO_XSELECT
  78         int x_fd = ConnectionNumber(window->display);
  79 #endif
  80 #endif
  81
  82         while(!done)
  83         {
  84
  85 // Can't cancel in XNextEvent because X server never figures out it's not
  86 // listening anymore and XCloseDisplay locks up.
  87 #ifdef SINGLE_THREAD
  88                 event = new XEvent;
  89                 XNextEvent(display->display, event);
  90 #else
  91 // This came from a linuxquestions post.
  92 // We can get a file descriptor for the X display & use select instead of XNextEvent.
  93 // The newest X11 library requires locking the display to use XNextEvent.
  94 #ifndef NO_XSELECT
  95                 fd_set x_fds;
  96                 FD_ZERO(&x_fds);
  97                 FD_SET(x_fd, &x_fds);
  98                 struct timeval tv;
  99                 tv.tv_sec = 0;  tv.tv_usec = 200000;
 100 //printf("BC_WindowEvents::run %d %s\n", __LINE__, window->title);
 101                 select(x_fd + 1, &x_fds, 0, 0, &tv);
 102 #else
 103                 usleep(100000);
 104 #endif
 105                 XLockDisplay(window->display);
 106                 while(!done && XPending(window->display))
 107                 {
 108                         event = new XEvent;
 109                         XNextEvent(window->display, event);
 110 #endif
 111                         if( event->type == BC_WindowBase::shm_completion_event ) {
 112                                 window->active_bitmaps.reque(event);
 113                                 delete event;
 114                                 continue;
 115                         }
 116                         if( event->type == ClientMessage ) {
 117                                 XClientMessageEvent *ptr = (XClientMessageEvent*)event;
 118                                 if( ptr->message_type == window->DestroyAtom ) {
 119                                         delete event;
 120                                         done = 1;
 121                                         break;
 122                                 }
 123                         }
 124 #ifndef SINGLE_THREAD
 125 // HACK: delay is required to get the close event
 126                         yield();
 127 //if(window && event)
 128 //printf("BC_WindowEvents::run %d %s %d\n", __LINE__, window->title, event->type);
 129                         window->put_event(event);
 130                 }
 131                 XUnlockDisplay(window->display);
 132 //printf("BC_WindowEvents::run %d %s\n", __LINE__, window->title);
 133 #else
 134                 display->put_event(event);
 135 #endif
 136
 137         }
 138 }
 139
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