QMainWindow 上的 QGraphicsScene

Question

Python 还是个新手，所以我试图让 QGraphicsScene 位于 QMainWindow 中。现在我的编码方式是两个 windows 会出现，但我只希望一个 window 与 QGraphicsScene "inside" QMainWindow 一起出现。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

您必须在 QMainWindow 中创建 QGraphicsScene（就像您希望它出现的那样）

然后在主体中，您只需创建 Window 的实例并显示它。

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_())

Answer 2

Qt（和其他 GUI 工具包）相信育儿。有一个 window 或另一个小部件，设置其父级。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()

QMainWindow 上的 QGraphicsScene

QGraphicsScene on a QMainWindow

python

user-interface

pyqt4

qgraphicsscene