QGraphicsSceneDragDropEvent ¶

概要 ¶

详细描述 ¶

QGraphicsView inherits the drag and drop functionality provided by QWidget . When it receives a drag and drop event, it translates it to a QGraphicsSceneDragDropEvent .

QGraphicsSceneDragDropEvent stores events of type GraphicsSceneDragEnter , GraphicsSceneDragLeave , GraphicsSceneDragMove ，或 GraphicsSceneDrop .

QGraphicsSceneDragDropEvent contains the position of the mouse cursor in both item, scene, and screen coordinates; this can be retrieved with pos() , scenePos() ，和 screenPos() .

The scene sends the event to the first QGraphicsItem under the mouse cursor that accepts drops; a graphics item is set to accept drops with setAcceptDrops() .

class QGraphicsSceneDragDropEvent ( [ type=None ] ) ¶

param type

Type

构造新 QGraphicsSceneDragDropEvent 的指定 type . The type can be either GraphicsSceneDragEnter , GraphicsSceneDragLeave , GraphicsSceneDragMove ，或 GraphicsSceneDrop .

PySide2.QtWidgets.QGraphicsSceneDragDropEvent. acceptProposedAction ( ) ¶

Sets the proposed action as accepted, i.e, the drop action is set to the proposed action. This is equal to:

setDropAction(proposedAction())
											

When using this function, one should not call accept() .

另请参阅

dropAction() setDropAction() proposedAction()

PySide2.QtWidgets.QGraphicsSceneDragDropEvent. buttons ( ) ¶

返回类型

MouseButtons

返回 MouseButtons value indicating which buttons were pressed on the mouse when this mouse event was generated.

另请参阅

MouseButtons

PySide2.QtWidgets.QGraphicsSceneDragDropEvent. dropAction ( ) ¶

返回类型

DropAction

Returns the action that was performed in this drag and drop. This should be set by the receiver of the drop and is returned by exec() .

另请参阅

setDropAction() acceptProposedAction()

PySide2.QtWidgets.QGraphicsSceneDragDropEvent. mimeData ( ) ¶

返回类型

QMimeData

This function returns the MIME data of the event.

PySide2.QtWidgets.QGraphicsSceneDragDropEvent. modifiers ( ) ¶

返回类型

KeyboardModifiers

Returns the keyboard modifiers that were pressed when the drag and drop event was created.

另请参阅

KeyboardModifiers

PySide2.QtWidgets.QGraphicsSceneDragDropEvent. pos ( ) ¶

返回类型

QPointF

Returns the mouse position of the event relative to the view that sent the event.

另请参阅

QGraphicsView screenPos() scenePos()

PySide2.QtWidgets.QGraphicsSceneDragDropEvent. possibleActions ( ) ¶

返回类型

DropActions

Returns the possible drop actions that the drag and drop can result in.

另请参阅

DropActions

PySide2.QtWidgets.QGraphicsSceneDragDropEvent. proposedAction ( ) ¶

返回类型

DropAction

Returns the drop action that is proposed, i.e., preferred. The action must be one of the possible actions as defined by possibleActions() .

另请参阅

DropAction possibleActions()

PySide2.QtWidgets.QGraphicsSceneDragDropEvent. scenePos ( ) ¶

返回类型

QPointF

Returns the position of the mouse in scene coordinates.

另请参阅

pos() screenPos()

PySide2.QtWidgets.QGraphicsSceneDragDropEvent. screenPos ( ) ¶

返回类型

QPoint

Returns the position of the mouse relative to the screen.

另请参阅

pos() scenePos()

PySide2.QtWidgets.QGraphicsSceneDragDropEvent. setButtons ( buttons ) ¶

参数

buttons – MouseButtons

Sets the mouse buttons that were pressed when the event was created to buttons .

另请参阅

MouseButtons buttons()

PySide2.QtWidgets.QGraphicsSceneDragDropEvent. setDropAction ( action ) ¶

参数

action – DropAction

This function lets the receiver of the drop set the drop action that was performed to action , which should be one of the possible actions 。调用 accept() in stead of acceptProposedAction() if you use this function.

另请参阅

dropAction() accept() possibleActions()

PySide2.QtWidgets.QGraphicsSceneDragDropEvent. setModifiers ( modifiers ) ¶

参数

modifiers – KeyboardModifiers

Sets the keyboard modifiers that were pressed when the event was created to modifiers .

另请参阅

KeyboardModifiers modifiers()

PySide2.QtWidgets.QGraphicsSceneDragDropEvent. setPos ( pos ) ¶

参数

pos – QPointF

Sets the position of the mouse to pos ; this should be relative to the widget that generated the event, which normally is a QGraphicsView .

另请参阅

pos() setScenePos()setScreenPos()

PySide2.QtWidgets.QGraphicsSceneDragDropEvent. setPossibleActions ( actions ) ¶

参数

actions – DropActions

Sets the possible drop actions that the drag can result in to actions .

另请参阅

DropActions possibleActions()

PySide2.QtWidgets.QGraphicsSceneDragDropEvent. setProposedAction ( action ) ¶

参数

action – DropAction

Sets the proposed action to action . The proposed action is a DropAction that is one of the possible actions as given by possibleActions() .

另请参阅

proposedAction() DropAction possibleActions()

PySide2.QtWidgets.QGraphicsSceneDragDropEvent. setScenePos ( pos ) ¶

参数

pos – QPointF

Sets the scene position of the mouse to pos .

另请参阅

scenePos() setScreenPos()setPos()

PySide2.QtWidgets.QGraphicsSceneDragDropEvent. setScreenPos ( pos ) ¶

参数

pos – QPoint

Sets the mouse position relative to the screen to pos .

另请参阅

screenPos() setScenePos()setPos()

PySide2.QtWidgets.QGraphicsSceneDragDropEvent. source ( ) ¶

返回类型

QWidget

This function returns the QGraphicsView that created the QGraphicsSceneDragDropEvent .