CODEWITHSUNDEEP
pythonuser-interfacepyqt4qgraphicsscene
MatthewS2494
MatthewS2494

Reputation: 47

QGraphicsScene on a QMainWindow

Still new to Python so I'm trying to get a QGraphicsScene to be inside a a QMainWindow. Right now the way I have it coded is that two windows will appear but I only want one window to appear with the QGraphicsScene "inside" the QMainWindow. Here is my code:

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()

Much thanks!

Upvotes: 0

Views: 2485

Answers (2)

mdurant
mdurant

Reputation: 28684

Qt (and other GUI toolkits) believe in parenting. The have one window or widget within another, set its parent. Note that you should be calling show on the outer one.

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()

Upvotes: 1

Mel
Mel

Reputation: 6075

You have to create your QGraphicsScene inside your QMainWindow (just like you want it to appears)

Then in the main, you only create an instance of Window and show it.

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_())

Upvotes: 0

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