QGraphicsSceneWheelEvent ¶

QGraphicsSceneWheelEvent class provides wheel events in the graphics view framework. 更多 …

概要 ¶

函数 ¶

def buttons ()
def delta ()
def modifiers ()
def orientation ()
def pos ()
def scenePos ()
def screenPos ()
def setButtons (buttons)
def setDelta (delta)
def setModifiers (modifiers)
def setOrientation (orientation)
def setPos (pos)
def setScenePos (pos)
def setScreenPos (pos)

详细描述 ¶

QGraphicsSceneWheelEvent class provides wheel events in the graphics view framework.

QWheelEvent s received by a QGraphicsView are translated into QGraphicsSceneWheelEvents; it translates the globalPos() into item, scene, and screen coordinates ( pos() , scenePos() ，和 screenPos() ).

另请参阅

QGraphicsSceneMouseEvent QGraphicsSceneContextMenuEvent QGraphicsSceneHoverEvent QWheelEvent

class QGraphicsSceneWheelEvent ( [ type=None ] ) ¶

param type

Type

构造 QGraphicsSceneWheelEvent of type type , which is always GraphicsSceneWheel .

PySide2.QtWidgets.QGraphicsSceneWheelEvent. buttons ( ) ¶

返回类型: MouseButtons

Returns the mouse buttons that were pressed when the wheel event occurred.

另请参阅

modifiers()

PySide2.QtWidgets.QGraphicsSceneWheelEvent. delta ( ) ¶

返回类型: int

Returns the distance that the wheel is rotated, in eighths (1/8s) of a degree. A positive value indicates that the wheel was rotated forwards away from the user; a negative value indicates that the wheel was rotated backwards toward the user.

Most mouse types work in steps of 15 degrees, in which case the delta value is a multiple of 120 (== 15 * 8).

PySide2.QtWidgets.QGraphicsSceneWheelEvent. modifiers ( ) ¶