Digikam::TagRegion Class Reference

Use this small class to convert between the formatted textual representation of a tag region in the database and the corresponding object.

Public Types
enum	Type { Invalid , Rect }

Public Member Functions
	TagRegion ()=default
	Construct an invalid region.
	TagRegion (const QRect &rect)
	Construct with the region.
	TagRegion (const QString &descriptor)
	Construct with the textual descriptor.
bool	intersects (const TagRegion &other, double fraction=0)
	Returns true if this and the other region intersect.
bool	isValid () const
bool	operator!= (const TagRegion &other) const
bool	operator== (const TagRegion &other) const
QRect	toRect () const
	If type is Rect, returns the contained rectangle.
QVariant	toVariant () const
	Stores in / loads from a variant.
QString	toXml () const
	Returns an XML textual representation of this region.
Type	type () const

Static Public Member Functions
static QRectF	absoluteToRelative (const QRect &region, const QSize &fullSize)
	Takes absolute region and full size to return the original relative region.
static QSize	adjustToOrientation (QRect &region, int orientation, const QSize &fullSize)
	Rotate and flip region to MetaEngine::ImageOrientation.
static TagRegion	fromVariant (const QVariant &var)
static QRect	mapFromOriginalSize (const DImg &reducedSizeImage, const QRect &fullSizeDetail)
static QRect	mapFromOriginalSize (const QSize &fullImageSize, const QSize &reducedImageSize, const QRect &fullSizeDetail)
static QRect	mapToOriginalSize (const DImg &reducedSizeImage, const QRect &reducedSizeDetail)
	Takes the original and reduced size from the DImg.
static QRect	mapToOriginalSize (const QSize &fullImageSize, const QSize &reducedImageSize, const QRect &reducedSizeDetail)
	Converts detail rectangles taken from a reduced size image to the original size, and vice versa.
static QRect	relativeToAbsolute (const QRectF &region, const DImg &reducedSizeImage)
	Takes the original and reduced size from the DImg, maps to original size.
static QRect	relativeToAbsolute (const QRectF &region, const QSize &fullSize)
	Takes a relative region and a full size and returns the absolute region.
static void	reverseToOrientation (QRect &region, int orientation, const QSize &fullSize)
	Reverse rotate and flip region to MetaEngine::ImageOrientation.

Protected Attributes
Type	m_type = Invalid
QVariant	m_value

Member Function Documentation

absoluteToRelative()

QRectF Digikam::TagRegion::absoluteToRelative ( const QRect &  region, const QSize &  fullSize  )

static

Used to write back rectangles into image's XMP. see MetadataHub::write.

adjustToOrientation()

QSize Digikam::TagRegion::adjustToOrientation ( QRect &  region, int  orientation, const QSize &  fullSize  )

static

The value region are calculated for the new image orientation.

intersects()

bool Digikam::TagRegion::intersects	(	const TagRegion &	other,
		double	fraction = 0
	)

fraction describes the relative overlap area needed to return true: If fraction is 0, returns true if the regions intersect at all. If fraction is 1, returns true only if other is completely contained in this region. If fraction is x, 0 < x < 1, returns true if the area of this region covered by the other is greater than x. Invalid areas never intersect.

reverseToOrientation()

void Digikam::TagRegion::reverseToOrientation ( QRect &  region, int  orientation, const QSize &  fullSize  )

static

The value region are calculated for the new image orientation.

toVariant()

QVariant Digikam::TagRegion::toVariant

(

)

const

Will only use native QVariant types.