通過另一個按鈕在QListWidget中添加/刪除單選按鈕？ Qt

Question

我試圖做一個簡單的應用程序，其中包含2個pushButtons和QWidgetList與單選按鈕。所有的UI元素都需要手動創建。我試圖使用這樣的信號，但Qt Creator不編譯這個。

// window.h 
    namespace Ui { 
    class Window; 
    } 

    class Window : public QWidget 
    { 
    Q_OBJECT 
    public: 
    explicit Window(QWidget *parent = 0); 

    QPushButton * addButton; 
    QPushButton * removeButton; 
    QLineEdit textEdit; 
    QList<QRadioButton*> radioButtonList; 
    QGridLayout * layout; 

    public slots: 
    void addButton_clicked(); 

    private: 
    QGroupBox *createRadiobuttonGroup(); 
    QGroupBox *createPushButtonGroup(); 
    QGroupBox *createTextEdit(); 
    QGroupBox *createListWidget(); 
    Ui::Window *ui; 
    }; 
     //Window.cpp 

      Window::Window(QWidget *parent) : 
    QWidget(parent), 
    ui(new Ui::Window) 


{ 
    QGridLayout *grid = new QGridLayout; 
     grid->addWidget(createRadiobuttonGroup(), 0, 1); 
     grid->addWidget(createPushButtonGroup(), 1, 1); 
     grid->addWidget(createTextEdit(), 1, 0); 
     grid->addWidget(createListWidget(), 0, 0); 
     setLayout(grid); 
     setWindowTitle(tr("Group Box")); 
     resize(640, 480); 
    } 


    QGroupBox *Window::createListWidget() 
    { 
     QGroupBox *groupBox = new QGroupBox(tr("RadioButton List")); 

     QListWidget *radioButtonList = new QListWidget(); 
     QVBoxLayout *vbox = new QVBoxLayout; 
     vbox->addWidget(radioButtonList); 
     vbox->addStretch(1); 
     groupBox->setLayout(vbox); 
      QListWidgetItem *item = new QListWidgetItem(); 

      radioButtonList -> addItem(item); 
     QString *value = new QString("Radiobutton value"); 
     radioButtonList -> setItemWidget(item, new QRadioButton(tr(value->toUtf8()))); 

     return groupBox; 
    } 



    QGroupBox *Window::createRadiobuttonGroup() 
    { 
     QGroupBox *groupBox = new QGroupBox(); 

     QRadioButton *radio1 = new QRadioButton(tr("&Vetical")); 
     QRadioButton *radio2 = new QRadioButton(tr("&Horizontal")); 

     radio1->setChecked(true); 

     QVBoxLayout *vbox = new QVBoxLayout; 
     vbox->addWidget(radio1); 
     vbox->addWidget(radio2); 
     vbox->addStretch(1); 
     groupBox->setLayout(vbox); 

     return groupBox; 
    } 

     QGroupBox *Window::createPushButtonGroup() 
    { 
     QGroupBox *groupBox = new QGroupBox(); 

     QPushButton *addButton = new QPushButton(tr("&Add")); 
     QPushButton *renameButton = new QPushButton(tr("&Remove")); 
     QVBoxLayout *vbox = new QVBoxLayout; 
     vbox->addWidget(addButton); 
     vbox->addWidget(renameButton); 
     vbox->addStretch(1); 
     groupBox->setLayout(vbox); 

     return groupBox; 
     } 

     QGroupBox *Window::createTextEdit() 
     { 
     QGroupBox *groupBox = new QGroupBox(); 

     QLineEdit *textEdit = new QLineEdit(); 
     QVBoxLayout *vbox = new QVBoxLayout; 
     vbox->addWidget (textEdit); 
     vbox->addStretch(1); 
     groupBox->setLayout(vbox); 

     connect(addButton, SIGNAL(clicked()), this, SLOT(addButton_clicked())); 

     return groupBox; 
     } 

    void Window::addButton_clicked() 

     { 

     QRadioButton radio_btn = new QRadioButton("name"); 

     vbox << radio_btn; // append radio button to the list 
     vbox->addWidget(radio_btn); 
     } 

Answer 1

void Window::addButton_clicked() 
{ 
    QRadioButton radio_btn = new QRadioButton("name"); 
    vbox << radio_btn; // append radio button to the list 
    vbox->addWidget(radio_btn); 
} 

可變vbox不該範圍存在。即使有，QVBoxLayout沒有<<運營商，所以你不能使用它。由於某種原因，您也可以將其稱爲列表。