def createPixmapItem(self, pixmap, position, matrix=QMatrix()):
item = QGraphicsPixmapItem(pixmap)
item.setFlags(QGraphicsItem.ItemIsSelectable|
QGraphicsItem.ItemIsMovable)
item.setPos(position)
item.setMatrix(matrix)
self.scene.clearSelection()
self.scene.addItem(item)
item.setSelected(True)
