hydra Namespace Reference

Classes
class	ArgumentParser
class	DB
class	Cursor
class	DirChangeEvent
class	DirMonitor
class	DirDBUpdater
class	Engine
class	FileIterator
class	NodePath
class	Token
class	Record
class	FilePathRecord
class	FileHashRecord
class	Tags
class	FileItemRecord
class	Registry
class	Register
class	MutexData
class	MutexPtr
class	Thumb
class	WebExport
Typedefs
typedef std::set< QString >	tags_t
Functions
int	commandImport (const QString &filename, bool smartmerge)
void	pruneDirectory (const QString &dirname)
short	detectExifRotate (const QString &filename)
QString	makeAbsolute (const QString &s)
QString	justName (const QString &s)
bool	isNormalFile (const QString &justname)
bool	isNormalDirectory (const QString &justdirname)
bool	isImageFile (const QString &justname)
bool	mkDir (const QString &name)
bool	linkFile (const QString &srcfile, const QString &destfile)
bool	moveFile (const QString &srcfile, const QString &destfile)
bool	delFile (const QString &srcfile)
bool	copyFile (const QString &srcfile, const QString &destfile)
bool	smartCopy (const QString &srcfile, const QString &destfile)
bool	delDir (const QString &dirpath)
QString	calcFileHash (const QString &filename)
int	scoreValue (const tags_t &tags)
bool	isQueryChar (const QChar &c)
bool	parseQueryTokens (const QString &s, std::shared_ptr< hydra::Token > &tok)
quint64	dateTimeAsInt64 (const QDateTime &dt)
void	int64ToDateTime (quint64 i, QDateTime &out)
template<class BASE , class SUB >
BASE *	loadfunc_impl (void)
int	rotateCodeToDegrees (int rotateCode)
int	rotateDegreesToCode (int degrees)
int	rotateCodeAdd (int rotateCode, int deltaCode)
short	detectTagRotate (const hydra::FileItemRecord::tags_t &tags)
void	rotateSizeByCode (short rotatecode, unsigned long origW, unsigned long origH, unsigned long &newW, unsigned long &newH)
QImage	rotateImageByCode (short rotatecode, QImage &img)
QPixmap	rotatePixmapByCode (short rotatecode, QPixmap &pix)
short	detectMultiRotate (const QString &filename, const hydra::FileItemRecord::tags_t &tags)
void	calcAspect (unsigned long C, unsigned long R, unsigned long WC, unsigned long WR, unsigned long &c, unsigned long &r, bool growtofit)
QString	escapeForXML (const QString &s)

---

Detailed Description

The core hydra namespace contains all the classes of the core hydra library.

Author:

Aleksander Demko

---

Function Documentation

void hydra::calcAspect	(	unsigned long	C,
		unsigned long	R,
		unsigned long	WC,
		unsigned long	WR,
		unsigned long &	c,
		unsigned long &	r,
		bool	growtofit
	)

Retains the aspect ratio on resized dimensions.

C, R current image width, heigth WC WR the designed (wanted) width, heigth c, r the resulting width, height

Parameters:

growtofit

if true, images smaller than desired will be scaled UP to fit

Author:

Aleksander Demko

QString hydra::calcFileHash

(

const QString &

filename

)

Calculates the has of the given file.

Returns:

The hash of the file (in ascii form) or an empty string on error.

Author:

Aleksander Demko

short hydra::detectExifRotate

(

const QString &

filename

)

Detects the auto rotation information in the file, if any. returns: -1 error/no exif found. 0 do not rotate 1 rotate 90 degrees cw 2 rotate 180 degrees cw 3 rotate 270 degrees cw

If exif detection support is not compiled, this function will always return 0.

Author:

Aleksander Demko

short hydra::detectMultiRotate	(	const QString &	filename,
		const hydra::FileItemRecord::tags_t &	tags
	)

Uses both detectExifRotate and detectTagRotate to come up with a reasonable default. Will never return -1 (will return 0 instead).

Author:

Aleksander Demko

short hydra::detectTagRotate

(

const hydra::FileItemRecord::tags_t &

tags

)

Detects the auto rotation information in the file, if any. -1 error/no exif found. 0 do not rotate 1 rotate 90 degrees cw 2 rotate 180 degrees cw 3 rotate 270 degrees cw

If exif detection support is not compiled, this function will always return 0.

Author:

Aleksander Demko

bool hydra::isImageFile

(

const QString &

justname

)

Is this an image file.

Author:

Aleksander Demko

bool hydra::isNormalDirectory

(

const QString &

justdirname

)

Returns true if the given directory is "normal". A normal file is one that isn't hidden. A hidden file starts with a .

Author:

Aleksander Demko

bool hydra::isNormalFile

(

const QString &

justname

)

Is this a normal file. A normal file doesnt begin with _ . or ,

Author:

Aleksander Demko

QString hydra::justName

(

const QString &

s

)

Returns just the filename and extension.

Author:

Aleksander Demko

QString hydra::makeAbsolute

(

const QString &

s

)

Return the given file as a unique, absolute filename.

Author:

Aleksander Demko

bool hydra::mkDir

(

const QString &

name

)

Creates a directory.

Author:

Aleksander Demko

bool hydra::parseQueryTokens	(	const QString &	s,
		std::shared_ptr< hydra::Token > &	tok
	)

Parse a given search/query string into a token tree. Returns true on success, false on failure. tok is no modified on failures. Empty strings return an always true query that matches everything. The resulting hydra::Token can they be used to test against hydra::Tags

Author:

Aleksander Demko

int hydra::rotateCodeAdd	(	int	rotateCode,
		int	deltaCode
	)

Adds the given amount (which can be negative)o to the rotateCode and returns the result. The returned result is always valid (0..3)

Author:

Aleksander Demko

int hydra::rotateCodeToDegrees

(

int

rotateCode

)

[inline]

Converts a rotate code to degrees, for display.

Author:

Aleksander Demko

int hydra::rotateDegreesToCode

(

int

degrees

)

Converts degrees to a rotate code. Returns -1 on invalid codes.

Author:

Aleksander Demko

QImage hydra::rotateImageByCode	(	short	rotatecode,
		QImage &	img
	)

Rotates an image as per the given rotate code. 0 do not rotate 1 rotate 90 degrees cw 2 rotate 180 degrees cw 3 rotate 270 degrees cw rotatecode must be >=0

Author:

Aleksander Demko

QPixmap hydra::rotatePixmapByCode	(	short	rotatecode,
		QPixmap &	pix
	)

Rotates an pixmap as per the given rotate code. 0 do not rotate 1 rotate 90 degrees cw 2 rotate 180 degrees cw 3 rotate 270 degrees cw rotatecode must be >=0

Author:

Aleksander Demko

void hydra::rotateSizeByCode	(	short	rotatecode,
		unsigned long	origW,
		unsigned long	origH,
		unsigned long &	newW,
		unsigned long &	newH
	)

Converts the given coordinates to the final coordinates, as if it where rotated by the given exif rotation code. Node, the variables can the same (&origW == newW, etc)

Author:

Aleksander Demko

int hydra::scoreValue

(

const tags_t &

tags

)

Finds and returns the length of the score tag. If none, 0 is returned.

Author:

Aleksander Demko

bool hydra::smartCopy	(	const QString &	srcfile,
		const QString &	destfile
	)

A "smart" copy. If the file exists, this function will fail. Otherwise, it will try to LINK the file. If that files, it will do a copy operation

Returns:

true on success

Author:

Aleksander Demko