Class sh::tools::ThumbnailManager¶

class sh::tools::ThumbnailManager : public QObject, public sh::base::Singleton ¶

Creates thumbnail images for filesystem nodes.

This is a cached source.

Public Functions

void requestThumbnail(std::shared_ptr<sh::filesystem::FilesystemNode> node, int width, int height, std::function<void(QIcon)> callback = 0)¶

Requests a thumbnail in a given size for a given node.

Parameters

callback: Called when the thumbnail is ready.

bool getThumbnail(std::shared_ptr<sh::filesystem::FilesystemNode> node, int width, int height, QIcon *result, bool *outdated = 0, bool *refreshRequested = 0)¶: Returns a thumbnail in a given size for a given node from the current cache.

void invalidateCache()¶: Invalidates the thumbnail cache.

void addThumbnailProvider(int index, std::shared_ptr<ThumbnailProvider> provider)¶: Adds a thumbnail provider.

void doInitialize()¶: Executes singleton initialization.

void shutdown()¶: Shutdown down this singleton.

bool isAlive()¶: Returns if this singleton is alive (true until its shutdown begins).

Signals

void thumbnailAvailable(std::shared_ptr<sh::filesystem::FilesystemNode> node)¶: Emitted when a new thumbnail is available.

Public Static Attributes

const int REGISTER_THUMBNAILPROVIDER_INDEX_CORE = 1000000¶

Base value for display indexes of core (i.e. very important) thumbnail providers.

Used in ThumbnailProvider::addThumbnailProvider.

const int REGISTER_THUMBNAILPROVIDER_INDEX_NORMAL = 2000000¶

Base value for display indexes of thumbnail providers with normal importance.

Used in ThumbnailProvider::addThumbnailProvider.

const int REGISTER_THUMBNAILPROVIDER_INDEX_EXOTIC = 3000000¶

Base value for display indexes of exotic thumbnail providers.

Used in ThumbnailProvider::addThumbnailProvider.

const int REGISTER_THUMBNAILPROVIDER_INDEX_FALLBACK = 4000000¶

Base value for display indexes of fallback thumbnail providers (those who try to get something when everything else failed).

Used in ThumbnailProvider::addThumbnailProvider.

Private Functions

ThumbnailManager()¶

void worker()¶

void _enforce_capacity()¶

Private Members

QHash<sh::filesystem::FilesystemNode*, Thumbnail*> thumbnails¶

QMutex thumbnailslock¶

QList<ThumbnailRequest> requestQueue¶

int maxworkers¶

int runningworkers¶

QMutex workermutex¶

int capacity¶

qint64 _curr_accessTime = 0¶

QHash<int, std::shared_ptr<ThumbnailProvider>> _thumbnailProviderMap¶

QList<std::shared_ptr<ThumbnailProvider>> _thumbnailProviders¶

QMutex _thumbnailProvidersMutex¶

class Thumbnail¶

Public Functions

Thumbnail(QIcon icon, qint64 validUntil, qint64 accessTime, std::weak_ptr<sh::filesystem::FilesystemNode> node, int width, int height)¶

Public Members

QIcon icon¶

qint64 validUntil¶

qint64 accessTime¶

bool refreshRequested¶

std::weak_ptr<sh::filesystem::FilesystemNode> node¶

int width¶

int height¶

class ThumbnailRequest¶

Public Functions

ThumbnailRequest(std::weak_ptr<sh::filesystem::FilesystemNode> node, int width, int height, QList<std::function<void(QIcon)>> callbacks)¶

bool operator==(ThumbnailRequest const &b)¶

Public Members

std::weak_ptr<sh::filesystem::FilesystemNode> node¶

int width¶

int height¶

QList<std::function<void(QIcon)>> callbacks¶

class ThumbnailSortStruct¶

Public Functions

ThumbnailSortStruct(sh::filesystem::FilesystemNode *node, qint64 accessTime)¶

Public Members

sh::filesystem::FilesystemNode *node¶

qint64 accessTime¶