PixmapFragment Class
class QPainter::PixmapFragmentThis class is used in conjunction with the QPainter::drawPixmapFragments() function to specify how a pixmap, or sub-rect of a pixmap, is drawn. More...
This class was introduced in Qt 4.7.
Public Variables
| qreal | height |
| qreal | opacity |
| qreal | rotation |
| qreal | scaleX |
| qreal | scaleY |
| qreal | sourceLeft |
| qreal | sourceTop |
| qreal | width |
| qreal | x |
| qreal | y |
Static Public Members
| PixmapFragment | create(const QPointF &pos, const QRectF &sourceRect, qreal scaleX = 1, qreal scaleY = 1, qreal rotation = 0, qreal opacity = 1) |
Detailed Description
The sourceLeft, sourceTop, width and height variables are used as a source rectangle within the pixmap passed into the QPainter::drawPixmapFragments() function. The variables x, y, width and height are used to calculate the target rectangle that is drawn. x and y denotes the center of the target rectangle. The width and height in the target rectangle is scaled by the scaleX and scaleY values. The resulting target rectangle is then rotated rotation degrees around the x, y center point.
See also QPainter::drawPixmapFragments().
Member Function Documentation
[static] PixmapFragment PixmapFragment::create(const QPointF &pos, const QRectF &sourceRect, qreal scaleX = 1, qreal scaleY = 1, qreal rotation = 0, qreal opacity = 1)
This is a convenience function that returns a QPainter::PixmapFragment that is initialized with the pos, sourceRect, scaleX, scaleY, rotation, opacity parameters.
This function was introduced in Qt 4.7.
Member Variable Documentation
qreal PixmapFragment::height
This variable holds the height of the source rectangle and is used to calculate the height of the target rectangle.
qreal PixmapFragment::opacity
This variable holds the opacity of the target rectangle, where 0.0 is fully transparent and 1.0 is fully opaque.
qreal PixmapFragment::rotation
This variable holds the rotation of the target rectangle in degrees. The target rectangle is rotated after it has been scaled.
qreal PixmapFragment::scaleX
This variable holds the horizontal scale of the target rectangle.
qreal PixmapFragment::scaleY
This variable holds the vertical scale of the target rectangle.
qreal PixmapFragment::sourceLeft
This variable holds the left coordinate of the source rectangle.
qreal PixmapFragment::sourceTop
This variable holds the top coordinate of the source rectangle.
qreal PixmapFragment::width
This variable holds the width of the source rectangle and is used to calculate the width of the target rectangle.
qreal PixmapFragment::x
This variable holds the x coordinate of center point in the target rectangle.
qreal PixmapFragment::y
This variable holds the y coordinate of the center point in the target rectangle.