PixmapFragment 類

class QPainter ::PixmapFragment

此類用於結閤 QPainter::drawPixmapFragments () 函數以指定如何繪製像素圖 (或像素圖子矩形)。更多...

該類在 Qt 4.7 引入。

所有成員列錶，包括繼承成員

公共變量

qreal	height
qreal	opacity
qreal	rotation
qreal	scaleX
qreal	scaleY
qreal	sourceLeft
qreal	sourceTop
qreal	width
qreal	x
qreal	y

靜態公共成員

PixmapFragment

create (const QPointF & pos , const QRectF & sourceRect , qreal scaleX = 1, qreal scaleY = 1, qreal rotation = 0, qreal opacity = 1)

詳細描述

The sourceLeft , sourceTop , width and height 用作像素圖源矩形的變量，會被傳入 QPainter::drawPixmapFragments () 函數。變量 x , y , width and height 用於計算繪製的目標矩形。 x and y 錶示目標矩形的中心。 width and height 是比例縮放目標矩形的 scaleX and scaleY 值。那麼，結果目標矩形會鏇轉 rotation 度圍繞 x , y 中心點。

另請參閱 QPainter::drawPixmapFragments ().

成員函數文檔編製

`[static]` PixmapFragment PixmapFragment:: create (const QPointF & pos , const QRectF & sourceRect , qreal scaleX = 1, qreal scaleY = 1, qreal rotation = 0, qreal opacity = 1)

此方便函數返迴 QPainter::PixmapFragment 的初始化是采用 pos , sourceRect , scaleX , scaleY , rotation , opacity 參數。

該函數在 Qt 4.7 引入。

成員變量文檔編製

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.