QGraphicsScene在QMainWindow上

Question

Python仍然是新的，所以我正在尝试让QGraphicsScene在一个QMainWindow中。现在，我编写它的方式是两个窗口将出现，但我只希望一个窗口与QGraphicsScene“在”QMainWindow中出现。这是我的代码：

import sys
from PyQt4 import QtGui, QtCore

class MyView(QtGui.QGraphicsView):
    def __init__(self):
        QtGui.QGraphicsView.__init__(self)

        self.scene = QtGui.QGraphicsScene(self)
        self.item = QtGui.QGraphicsRectItem(300,400,100,100)
        self.scene.addItem(self.item)
        self.setScene(self.scene)

class Window(QtGui.QMainWindow):
    def __init__(self):
        #This initializes the main window or form
        super(Window,self).__init__()
        self.setGeometry(50,50,900,700)
        self.setWindowTitle("Pre-Alignment system")

def run():
    app = QtGui.QApplication(sys.argv)
    GUI = Window()
    view = MyView()
    view.show()
    sys.exit(app.exec_())

run()

非常感谢！

Answer 1

Qt (和其他GUI工具包)相信为人父母。在另一个窗口或小部件中有一个窗口或小部件，设置其父窗口或小部件。请注意，您应该在外部调用show。

import sys
from PyQt4 import QtGui, QtCore

class MyView(QtGui.QGraphicsView):
    def __init__(self, parent=None):
        QtGui.QGraphicsView.__init__(self, parent=parent)

        self.scene = QtGui.QGraphicsScene(self)
        self.item = QtGui.QGraphicsRectItem(300,400,100,100)
        self.scene.addItem(self.item)
        self.setScene(self.scene)

class Window(QtGui.QMainWindow):
    def __init__(self, parent=None):
        #This initializes the main window or form
        super(Window,self).__init__(parent=parent)
        self.setGeometry(50,50,900,700)
        self.setWindowTitle("Pre-Alignment system")

def run():
    app = QtGui.QApplication(sys.argv)
    GUI = Window()
    view = MyView(GUI)
    GUI.show()
    sys.exit(app.exec_())

run()

Answer 2

您必须在您的QGraphicsScene中创建QMainWindow (就像您希望它出现一样)。

然后，在总体上，您只创建一个Window实例并显示它。

class Window(QtGui.QMainWindow):
    def __init__(self):
        #This initializes the main window or form
        super(Window,self).__init__()
        self.setGeometry(50,50,900,700)
        self.setWindowTitle("Pre-Alignment system")
        #create the view
        self.view=MyView()
        self.setCentralWidget(self.view)

if __name__=='__main__':
    app = QtGui.QApplication(sys.argv)
    GUI = Window()
    GUI.show()
    sys.exit(app.exec_())