Qt和蟒蛇 - 如何引用另一個類

Question

我有一個包含從那裏我需要打電話的場景在小部件的場景和按鈕返回主窗口：

import sys 
from PySide.QtCore import * 
from PySide.QtGui import * 

class Widget(QWidget): 
    def __init__(self, scene): 
     super(Widget, self).__init__() 

     self.refreshButton = QPushButton("Refresh", self) 
     self.refreshButton.clicked.connect(self.Refresh) 
       # THIS ACTION SHOULD PROCEED ARGUMENTS 
       # TO FUNCION "Refresh" 
     layout = QHBoxLayout() 
     layout.addWidget(self.refreshButton) 

     self.setLayout(layout) 
     self.show() 

    def Refresh(self, scene): 
     mainWinScene = scene 
     print "On Refresh! - ", mainWinScene.items() 

class MainScene(QGraphicsScene): 
    def __init__(self): 
     super(MainScene, self).__init__() 


class MainWindow(QMainWindow): 
    def __init__(self, parent=None): 
     super(MainWindow, self).__init__(parent) 

     self.scene = MainScene() 
     self.scene.setSceneRect(0,0,200,100) 
     self.scene.addLine(20,10,150,80) 

     self.view = QGraphicsView() 
     self.view.setScene(self.scene) 

     drawRectAct = QAction('&Add Rectangle', self) 
     drawRectAct.triggered.connect(self.drawRect) 
     shapeInspectorAct = QAction('&Show Inspector', self) 
     shapeInspectorAct.triggered.connect(self.showInspector) 

     menubar = self.menuBar() 
     fileMenu = menubar.addMenu('&Shapes') 
     fileMenu.addAction(drawRectAct) 
     fileMenu.addAction(shapeInspectorAct) 

     self.setCentralWidget(self.view) 

    def drawRect(self): 
     self.scene.addRect(50,50,20,30) 

    def showInspector(self): 
     self.I = Widget(self.scene) 

if __name__ == '__main__': 
    app = QApplication(sys.argv) 
    main = MainWindow() 
    main.show() 
    sys.exit(app.exec_()) 

如何進行「現場」的說法與行動 - 以「刷新」功能？

Answer 1

可以在Widget的構造函數傳遞一個場景：

class Widget(QWidget): 
    def __init__(self, scene): 
     ... 
     self.scene = scene 
     ... 

    def Refresh(self): 
     print "On Refresh! - ", self.scene.items() 


class MainWindow(QMainWindow): 
... 
    def showInspector(self): 
     self.I = Widget(self.scene) 
...