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// -*- Mode: C++; tab-width: 2; -*-
// vi: set ts=2:
//
#include <BALL/VIEW/KERNEL/iconLoader.h>
#include <QtCore/QDir>
#include <QtCore/QString>
#include <QtGui/QIcon>
#include <BALL/SYSTEM/path.h>
#include <BALL/SYSTEM/fileSystem.h>
#include <BALL/DATATYPE/string.h>
namespace BALL
{
namespace VIEW
{
QMutex IconLoader::mutex_;
boost::shared_ptr<IconLoader> IconLoader::loader_;
IconLoader::IconLoader()
: invalid_(new QIcon())
{
Path p;
String found = p.find("graphics/icons");
if (found != "")
icon_dirs_.append(found.c_str());
setup_();
}
IconLoader::IconLoader(const QStringList& icon_dirs)
: invalid_(new QIcon()), icon_dirs_(icon_dirs)
{
setup_();
}
IconLoader::IconLoader(const std::list<String>& icon_dirs)
: invalid_(new QIcon())
{
for(std::list<String>::const_iterator it = icon_dirs.begin(); it != icon_dirs.end(); ++it)
{
icon_dirs_.append(it->c_str());
}
setup_();
}
IconLoader::~IconLoader()
{
for(HashMap<String, QIcon*>::iterator it = icon_map_.begin(); it != icon_map_.end(); ++it)
{
delete it->second;
}
delete invalid_;
}
void IconLoader::setup_()
{
sizes_.push_back(16);
sizes_.push_back(22);
sizes_.push_back(32);
sizes_.push_back(48);
sizes_.push_back(64);
sizes_.push_back(128);
}
void IconLoader::appendIconPath(const String& path)
{
icon_dirs_.append(path.c_str());
}
const QIcon& IconLoader::getIcon(const String& name)
{
//See if we have already loaded this icon
hash_map_lock_.lockForRead();
HashMap<String, QIcon*>::iterator res = icon_map_.find(name);
hash_map_lock_.unlock();
if (res != icon_map_.end())
{
return *res->second;
}
hash_map_lock_.lockForWrite();
//We cannot be sure that another thread did not yet load the icon.
//This must be rechecked or memory leaks will occur
res = icon_map_.find(name);
if (res != icon_map_.end())
{
hash_map_lock_.unlock();
return *res->second;
}
QIcon* tmp = loadIcon_(name);
hash_map_lock_.unlock();
if (!tmp)
{
Log.error() << "IconLoader: Could not find the icon " << name << std::endl;
return *invalid_;
}
return *tmp;
}
IconLoader& IconLoader::instance()
{
if (!loader_)
{
mutex_.lock();
// Double check that the instance has not been created while we were aquiring the lock
// Yes, it has to look like this ;-)
if (!loader_)
{
loader_ = boost::shared_ptr<IconLoader>(new IconLoader());
}
mutex_.unlock();
}
return *loader_;
}
QIcon* IconLoader::loadIcon_(const String& name)
{
const QString filename = QString(name.c_str()) + ".png";
for (QStringList::iterator it = icon_dirs_.begin(); it != icon_dirs_.end(); ++it)
{
QDir base_dir(*it);
if (!base_dir.exists())
{
Log.error() << "Could not locate the icon directory: " << it->toStdString() << std::endl;
return 0;
}
QString category_name;
QIcon* result = 0;
for(std::list<int>::iterator sit = sizes_.begin(); sit != sizes_.end(); ++sit)
{
QDir size_dir = *it + FileSystem::PATH_SEPARATOR + QString::number(*sit) + "x" + QString::number(*sit);
if (!size_dir.exists())
{
continue;
}
if (size_dir.exists(filename))
{
if (!result)
{
result = new QIcon();
}
result->addFile(size_dir.path() + FileSystem::PATH_SEPARATOR + filename);
}
}
if (result)
{
icon_map_[name] = result;
return result;
}
}
return 0;
}
}
}
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