如何使用Qt的連接boost :: scoped_ptr <QWidget>

Question

我正在修改現有的程序。我在類.h文件中：

boost::scoped_ptr<QWidget> _widget; 

我在.cpp文件的方法：

void FaceRecoWidget::createWidget() 
{ 
    _widget.reset(new QDialog); 
    QVBoxLayout* layout(new QVBoxLayout); 

    // some stuff... 

    // Now I want to add a 'Cancel' button. This I what I do:  
    QPushButton* cancel_button(new QPushButton("Cancel")); 
    // but next line won't compile because _widget is not a 'const QObject*' 
    connect(cancel_button, SIGNAL(clicked()), _widget, SLOT(reject())); 

    layout->addWidget(cancel_button); 
    _widget->setLayout(layout); 
} 

如何解決此得到什麼？

Answer 1

connect接受指針，所以你應該通過存儲在boost::scoped_ptr原始指針：如果你設置`

connect(cancel_button, SIGNAL(clicked()), _widget.get(), SLOT(reject()));