QGraphicsview + scene + QGroupBox移动问题

Question

在过去的几天里，我一直在试图解决小部件移动的问题。在某些时候，我尝试用鼠标信号重写QComboBox类，但没有工作。作为一项工作，我解决了养育我的小部件到QGraphicsWidget，但一旦我尝试添加另一个项目，它不再显示，我不知道该怎么做。下面是完整的测试脚本:

from PyQt4 import QtGui,  QtCore
from PyQt4.QtGui import QApplication,QGraphicsItem, QGraphicsView, QGraphicsScene, QDesktopWidget, QCheckBox, QGroupBox, QPushButton, QGridLayout, QLabel, QLineEdit, QComboBox, QFont, QRadioButton, QButtonGroup, QWidget, QShortcut, QKeySequence, QIcon, QListView, QStandardItemModel, QStandardItem, QAction, QIntValidator, QListWidget, QProgressBar, QSpacerItem
from PyQt4.QtCore import QRect
from functools import partial
import sys
class node_GUI(QtGui.QWidget):
    def __init__(self):
        super(node_GUI, self).__init__()

class Main(QtGui.QMainWindow):
    def __init__(self, *args):
        super(Main, self).__init__(*args)#QtGui.QMainWindow.__init__(self)
        self.init_defaults()
    def init_defaults(self):
        self.setGeometry(800,800,500,200)
        self.lay_main = QGridLayout()
        self.centralwidget = QtGui.QWidget()
        self.centralwidget.setLayout(self.lay_main)
        self.setCentralWidget(self.centralwidget)
        btn_create_node = QPushButton("Create Node View")
        btn_create_node.clicked.connect(self.create_node_view)
        self.lay_main.addWidget(btn_create_node)
    def showWindow(self,window):
        window.show()
    def printTest(self):
        print "Start"
        box = QGroupBox("subWidget")
        box_btn = QPushButton("Test")
        box_btn.clicked.connect(self.printTest)
        le_edit = QLineEdit()
        lay = QGridLayout()
        box.setLayout(lay)
        lay.addWidget(box_btn)
        lay.addWidget(le_edit)
        area = QtGui.QGraphicsWidget()
        area.setMinimumSize(QtCore.QSizeF(400,300))
        area.setFlag(QtGui.QGraphicsItem.ItemIsMovable, True)
        area.setFlag(QtGui.QGraphicsItem.ItemIsSelectable, True)
        proxy = self.scene.addWidget(box)
        proxy.setParentItem(area)
        print "END"
    def create_node_view(self):
        print "creting node view"
        window = node_GUI()
        window.setGeometry(QRect(100, 100, 400, 200))
        window.setWindowTitle("node ")
        window.setObjectName("node")
        show_window = QPushButton("Show Node Editor")
        show_window.setObjectName("btn")
        show_window.clicked.connect(partial(self.showWindow,window))
        self.lay_main.addWidget(show_window)
        box = QGroupBox("Widgets")
        box_btn = QPushButton("Test")
        box_btn.clicked.connect(self.printTest)
        le_edit = QLineEdit()
        lay = QGridLayout()
        box.setLayout(lay)
        lay.addWidget(box_btn)
        lay.addWidget(le_edit)
        area = QtGui.QGraphicsWidget()
        area.setMinimumSize(QtCore.QSizeF(300,300))
        area.setFlag(QtGui.QGraphicsItem.ItemIsMovable, True)
        area.setFlag(QtGui.QGraphicsItem.ItemIsSelectable, True)
        area.setAutoFillBackground(True)
        ecs = QtGui.QGraphicsEllipseItem()
        ecs.setRect(QtCore.QRectF(79,79,79,79))
        ecs.setFlag(QtGui.QGraphicsItem.ItemIsMovable, True)
        ecs.setFlag(QtGui.QGraphicsItem.ItemIsSelectable, True)
        view = QGraphicsView()
        self.scene = QGraphicsScene()
        self.scene.addItem(area)
        proxy = self.scene.addWidget(box)
        proxy.setParentItem(area)
        self.scene.addItem(ecs)
        view.setScene(self.scene)
        lay_window = QGridLayout()
        window.setLayout(lay_window)
        lay_window.addWidget(view)

def main():
    app = QtGui.QApplication(sys.argv)
    main = Main()
    main.show()
    sys.exit(app.exec_())

if __name__ == "__main__":
    main()

当你点击创建节点视图>显示节点编辑器>测试按钮>一个新的GroupBox应该出现，但这不起作用。不知道为什么

Answer 1

正确，所以我停止使用QGraphicsWidget()，而不是使用qgraphicsrectem(例如ecs)一旦我做了改变，一切都开始按预期工作