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50 
51 #include <QtWidgets>
52 
mainWindowExample()53 void mainWindowExample()
54 {
55     QMdiArea *mdiArea = new QMdiArea;
56 //! [0]
57     QMainWindow *mainWindow = new QMainWindow;
58     mainWindow->setCentralWidget(mdiArea);
59 //! [0]
60 
61     mdiArea->addSubWindow(new QPushButton("Push Me Now!"));
62 
63     mainWindow->show();
64 }
65 
addingSubWindowsExample()66 void addingSubWindowsExample()
67 {
68     QWidget *internalWidget1 = new QWidget;
69     QWidget *internalWidget2 = new QWidget;
70 
71 //! [1]
72     QMdiArea mdiArea;
73     QMdiSubWindow *subWindow1 = new QMdiSubWindow;
74     subWindow1->setWidget(internalWidget1);
75     subWindow1->setAttribute(Qt::WA_DeleteOnClose);
76     mdiArea.addSubWindow(subWindow1);
77 
78     QMdiSubWindow *subWindow2 =
79         mdiArea.addSubWindow(internalWidget2);
80 
81 //! [1]
82     subWindow1->show();
83     subWindow2->show();
84 
85     mdiArea.show();
86 }
87