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gitem_rotate.py
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gitem_rotate.py
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import sys
from PySide2 import QtWidgets, QtCore, QtGui
class GraphicsEllipseItem(QtWidgets.QGraphicsEllipseItem):
def __init__(self, parent=None):
QtWidgets.QGraphicsEllipseItem.__init__(self, parent)
self.initialPos = QtCore.QPointF()
self.rotation = 0
self.setFlags(self.flags() | QtWidgets.QGraphicsItem.ItemIsSelectable)
def mousePressEvent(self, event):
self.initalPos = self.mapToScene(event.pos())
QtWidgets.QGraphicsItem.mousePressEvent(event)
def mouseMoveEvent(self, event):
pos = QtCore.QPointF(self.mapToScene(event.pos()))
if pos.y() > self.initalPos.y() :
self.rotation += 1
else:
self.rotation -= 1
if True:
xform = QtGui.QTransform()
xform.rotate(self.rotation)
self.setTransform(xform)
else:
self.setRotation(self.rotation)
self.initialPos = pos
class GraphicsView(QtWidgets.QGraphicsView):
def __init__(self):
QtWidgets.QGraphicsView.__init__(self)
self.scene = QtWidgets.QGraphicsScene()
self.setScene(self.scene)
self.rect1 = QtCore.QRect(10, 10, 80, 60)
self.rect2 = QtCore.QRect(50, 80, 80, 60)
self.item1 = GraphicsEllipseItem()
self.item1.setRect(-40, -30, 80, 60)
self.scene.addItem(self.item1)
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
box = GraphicsView()
box.show()
sys.exit(app.exec_())