Pyside2 如何移动盒子? [英] Pyside2 How can i move box?
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问题描述
如果我按下左键移动鼠标,我想移动我的 SimpleItem 对象.如果我按下对象,我已成功获取鼠标光标的位置.但我不知道如何将项目移动到该位置.你能帮我吗?
I want to move my SimpleItem object if I move mouse pressing left button. I have successed getting the position of mouse cursor if I press the object. but I have no idea how to move the item to that position. Could you help me?
import sys
from PySide2 import QtGui, QtWidgets, QtCore
class SimpleItem(QtWidgets.QGraphicsItem):
def __init__(self):
QtWidgets.QGraphicsItem.__init__(self)
self.location = 1.0
def boundingRect(self):
penWidth = 1.0
return QtCore.QRectF(-10 - penWidth / 2, -10 - penWidth / 2,
20 + penWidth, 20 + penWidth)
def paint(self, painter, option, widget):
rect = self.boundingRect()
painter.drawRect(rect)
def mousePressEvent(self, event):
print("hello")
def mouseMoveEvent(self, event):
print(event.pos())
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
scene = QtWidgets.QGraphicsScene()
item = SimpleItem()
scene.addItem(item)
view = QtWidgets.QGraphicsView(scene)
view.show()
sys.exit(app.exec_())
推荐答案
在QGraphicsXXXItem的情况下不需要覆盖任何方法来启用移动,启用标志就足够了QGraphicsItem::ItemIsMovable
.
In the case of the QGraphicsXXXItem it is not necessary to overwrite any method to enable the movement, it is enough to enable the flag QGraphicsItem::ItemIsMovable
.
import sys
from PySide2 import QtGui, QtWidgets, QtCore
class SimpleItem(QtWidgets.QGraphicsItem):
def __init__(self):
QtWidgets.QGraphicsItem.__init__(self)
self.setFlag(QtWidgets.QGraphicsItem.ItemIsMovable, True)
def boundingRect(self):
penWidth = 1.0
return QtCore.QRectF(-10 - penWidth / 2, -10 - penWidth / 2,
20 + penWidth, 20 + penWidth)
def paint(self, painter, option, widget):
rect = self.boundingRect()
painter.drawRect(rect)
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
scene = QtWidgets.QGraphicsScene()
item = SimpleItem()
scene.addItem(item)
view = QtWidgets.QGraphicsView(scene)
view.show()
sys.exit(app.exec_())
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