GLvideo_mt.cpp

   1 /* ***** BEGIN LICENSE BLOCK *****
   2  *
   3  * The MIT License
   4  *
   5  * Copyright (c) 2008 BBC Research
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
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  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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  23  * THE SOFTWARE.
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  25  * ***** END LICENSE BLOCK ***** */
  26
  27 #include "GLvideo_mt.h"
  28 #include "GLvideo_rt.h"
  29 #include "videoTransport.h"
  30 #include "frameQueue.h"
  31
  32 #include "GLvideo_params.h"
  33
  34 GLvideo_mt::GLvideo_mt(QWidget* parent, VideoTransport *v, GLvideo_params& vr_params) :
  35         QGLWidget(parent), vt(v), renderThread(new GLvideo_rt(*this, vr_params)), vr_params(vr_params)
  36 {
  37         alwaysHideMouse = false;
  38         setMouseTracking(true);
  39         connect(&mouseHideTimer, SIGNAL(timeout()), this, SLOT(hideMouse()));
  40         mouseHideTimer.setSingleShot(true);
  41 }
  42
  43 GLvideo_mt::~GLvideo_mt()
  44 {
  45         if(renderThread) delete renderThread;
  46 }
  47
  48 void GLvideo_mt::start()
  49 {
  50         renderThread->start(/*QThread::TimeCriticalPriority*/);
  51 }
  52
  53 /* Reveal the mouse whenever it is moved,
  54  * Cause it to be hidden 1second later */
  55 void GLvideo_mt::mouseMoveEvent(QMouseEvent *ev)
  56 {
  57         ev=ev;
  58
  59         if (!mouseHideTimer.isActive() && alwaysHideMouse==false)
  60                 setCursor(QCursor(Qt::ArrowCursor));
  61         mouseHideTimer.start(1000);
  62 }
  63
  64 void GLvideo_mt::hideMouse()
  65 {
  66         setCursor(QCursor(Qt::BlankCursor));
  67 }
  68
  69 void GLvideo_mt::setAlwaysHideMouse(bool h)
  70 {
  71         alwaysHideMouse=h;
  72
  73         if (alwaysHideMouse)
  74                 hideMouse();
  75 }
  76
  77 void GLvideo_mt::initializeGL()
  78 {
  79         //handled by the worker thread
  80 }
  81
  82 /* rendering is done here. */
  83 void GLvideo_mt::paintGL()
  84 {
  85 }
  86
  87 void GLvideo_mt::paintEvent(QPaintEvent * event)
  88 {
  89         event=event;
  90         //absorb any paint events - let the worker thread update the window
  91 }
  92
  93 void GLvideo_mt::resizeEvent(QResizeEvent * event)
  94 {
  95         //added at the suggestion of Trolltech - if the rendering thread
  96         //is slow to start the first window resize event will issue a makeCurrent() before
  97         //the rendering thread does, stealing the openGL context from it
  98         renderThread->resizeViewport(event->size().width(), event->size().height());
  99 }