void MainWindow::callSlot(QString text)
{
ui.scrollArea->setWidget(new QWidget());
QWidget* camera = CameraFactory::CreateCamera();
if(text == QStringLiteral("全屏显示"))
{
CameraFactory::SetLBScreen(QStringLiteral("屏幕恢复"));
camera->setParent(this);
camera->setWindowFlags(Qt::Window);
camera->showFullScreen();
camera->setFocus();
}
else
{
CameraFactory::SetLBScreen(QStringLiteral("全屏显示"));
ui.scrollArea->setWidget(camera);
camera->setFocus();
//camera->setParent(ui.scrollArea);
//camera->show();
//camera->setFocus();
}
connect(camera, SIGNAL(backSignal()), this, SLOT(reportSlot()));
connect(camera, SIGNAL(imageSignal(QString)), this, SLOT(loadNewImage(QString)));
connect(camera, SIGNAL(fullScreenSignal(QString)), this, SLOT(fullScreenSlot(QString)));
}
void MainWindow::cameraSlot()
{
QWidget* camera = CameraFactory::CreateCamera();
ui.scrollArea->setWidget(camera);
WidgetFactory::SetCurrentWidget(WidgetFactory::Camera);
camera->setFocus();
connect(camera, SIGNAL(backSignal()), this, SLOT(reportSlot()));
connect(camera, SIGNAL(imageSignal(QString)), this, SLOT(loadNewImage(QString)));
connect(camera, SIGNAL(fullScreenSignal(QString)), this, SLOT(fullScreenSlot(QString)));
}
int Cache::prefetch(cache_key_t key)
{
// if(need_free())
// free_some_lru();
if(key.first == FIM_STDIN_IMAGE_NAME)
return 0;// just a fix in the case the browser is still lame
if(is_in_cache(key))
return 0;
if(!loadNewImage(key))
return -1;
setGlobalVariable(FIM_VID_CACHED_IMAGES,cached_elements());
setGlobalVariable(FIM_VID_CACHE_STATUS,getReport().c_str());
return 0;
// return getCachedImage(key)?0:-1;
}
Image * Cache::useCachedImage(cache_key_t key)
{
/*
* the calling function needs an image, so calls this method.
* if we already have the desired image and it is already used,
* a clone is built and returned.
*
* if we have an unused master, we return it.
*
* then declare this image as used and increase a relative counter.
*
* a freeImage action will do the converse operation (and delete).
* if the image is not already cached, it is loaded, if possible.
*
* so, if there is no such image, NULL is returned
* */
#ifdef FIM_CACHE_DEBUG
std::cout << " useCachedImage(\""<<key.first<<","<<key.second<<"\")\n";
#endif
Image * image=NULL;
if(!is_in_cache(key))
{
/*
* no Image cached at all for this filename
* */
image = loadNewImage(key);
if(!image)return NULL; // bad luck!
usageCounter[key]=1;
setGlobalVariable(FIM_VID_CACHE_STATUS,getReport().c_str());
return image;
// usageCounter[key]=0;
}
else
{
/*
* at least one copy of this filename image is in cache
* */
image=getCachedImage(key);// in this way we update the LRU cache :)
if(!image)
{
// critical error
#ifdef FIM_CACHE_DEBUG
cout << "critical internal cache error!\n";
#endif
setGlobalVariable(FIM_VID_CACHE_STATUS,getReport().c_str());
return NULL;
}
if( used_image( key ) )
{
// if the image was already used, cloning occurs
// image = image->getClone(); // EVIL !!
try
{
#ifdef FIM_CACHE_DEBUG
Image * oi=image;
#endif
image = new Image(*image); // cloning
#ifdef FIM_CACHE_DEBUG
std::cout << " cloned image: \"" <<image->getName()<< "\" "<< image << " from \""<<oi->getName() <<"\" " << oi << "\n";
#endif
}
catch(FimException e)
{
/* we will survive :P */
image = NULL; /* we make sure no taint remains */
// if( e != FIM_E_NO_IMAGE )throw FIM_E_TRAGIC; /* hope this never occurs :P */
}
if(!image)return NULL; //means that cloning failed.
clone_pool.insert(image); // we have a clone
cloneUsageCounter[image]=1;
}
lru_touch( key );
// if loading and eventual cloning succeeded, we count the image as used of course
usageCounter[key]++;
setGlobalVariable(FIM_VID_CACHE_STATUS,getReport().c_str());
return image; //so, it could be a clone..
}
}