PySide.QtGui.QGraphicsPixmapItem class provides a pixmap item that you can add to a PySide.QtGui.QGraphicsScene .
To set the item's pixmap, pass a PySide.QtGui.QPixmap to PySide.QtGui.QGraphicsPixmapItem ‘s constructor, or call the PySide.QtGui.QGraphicsPixmapItem.setPixmap() function. The PySide.QtGui.QGraphicsPixmapItem.pixmap() function returns the current pixmap.
PySide.QtGui.QGraphicsPixmapItem uses pixmap's optional alpha mask to provide a reasonable implementation of PySide.QtGui.QGraphicsPixmapItem.boundingRect() , PySide.QtGui.QGraphicsPixmapItem.shape() ，和 PySide.QtGui.QGraphicsPixmapItem.contains() .
The pixmap is drawn at the item's (0, 0) coordinate, as returned by PySide.QtGui.QGraphicsPixmapItem.offset() . You can change the drawing offset by calling PySide.QtGui.QGraphicsPixmapItem.setOffset() .
You can set the pixmap's transformation mode by calling PySide.QtGui.QGraphicsPixmapItem.setTransformationMode() . By default, Qt.FastTransformation is used, which provides fast, non-smooth scaling. Qt.SmoothTransformation enables QPainter.SmoothPixmapTransform on the painter, and the quality depends on the platform and viewport. The result is usually not as good as calling QPixmap::scale() directly. Call PySide.QtGui.QGraphicsPixmapItem.transformationMode() to get the current transformation mode for the item.
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This enum describes how PySide.QtGui.QGraphicsPixmapItem calculates its shape and opaque area.
默认值为 MaskShape .
| 常量 | 描述 |
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| QGraphicsPixmapItem.MaskShape | The shape is determined by calling QPixmap.mask() . This shape includes only the opaque pixels of the pixmap. Because the shape is more complex, however, it can be slower than the other modes, and uses more memory. |
| QGraphicsPixmapItem.BoundingRectShape | The shape is determined by tracing the outline of the pixmap. This is the fastest shape mode, but it does not take into account any transparent areas on the pixmap. |
| QGraphicsPixmapItem.HeuristicMaskShape | The shape is determine by calling QPixmap.createHeuristicMask() . The performance and memory consumption is similar to MaskShape . |
| 返回类型： | PySide.QtCore.QPointF |
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Returns the pixmap item's offset , which defines the point of the top-left corner of the pixmap, in local coordinates.
| 返回类型： | PySide.QtGui.QPixmap |
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Returns the item's pixmap, or an invalid PySide.QtGui.QPixmap if no pixmap has been set.
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This convenience function is equivalent to calling setOffset( PySide.QtCore.QPointF ( x , y )).
| 参数： | offset – PySide.QtCore.QPointF |
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Sets the pixmap item's offset to offset . PySide.QtGui.QGraphicsPixmapItem will draw its pixmap using offset for its top-left corner.
| 参数： | pixmap – PySide.QtGui.QPixmap |
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Sets the item's pixmap to pixmap .
| 参数： | mode – PySide.QtGui.QGraphicsPixmapItem.ShapeMode |
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Sets the item's shape mode to mode . The shape mode describes how PySide.QtGui.QGraphicsPixmapItem calculates its shape. The default mode is MaskShape .
另请参阅
PySide.QtGui.QGraphicsPixmapItem.shapeMode() QGraphicsPixmapItem.ShapeMode
| 参数： | mode – PySide.QtCore.Qt.TransformationMode |
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| 返回类型： | PySide.QtGui.QGraphicsPixmapItem.ShapeMode |
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Returns the item's shape mode. The shape mode describes how PySide.QtGui.QGraphicsPixmapItem calculates its shape. The default mode is MaskShape .
另请参阅
PySide.QtGui.QGraphicsPixmapItem.setShapeMode() QGraphicsPixmapItem.ShapeMode
| 返回类型： | PySide.QtCore.Qt.TransformationMode |
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Returns the transformation mode of the pixmap. The default mode is Qt.FastTransformation , which provides quick transformation with no smoothing.
