c++ - 滚动条Qt，无法滚动

Question

谁能告诉我为什么我可以从我的QTableView 中看到滚动条，但不能使用它？有人有想法吗？

我的代码:

View::View()
{
}

void View::init()
{

    // add model and Table

    myModel= new Model();
    QTableView *myView=new QTableView( this );
    myView->setModel(myModel);
    QWidget *mywidget= new QWidget(this);

    // add buttons and labels

    QPushButton* btnaddtotable = new QPushButton( "Add to Table",this);
    btnaddtotable->setGeometry(50,20,100,40);
    QPushButton* btnFile = new QPushButton( "Open file",this);
    btnFile->setGeometry(50,20,100,40);
    QPushButton* btnOpenFile = new QPushButton( "Search file",this);
    btnFile->setGeometry(50,20,100,40);
    btnOpenFile->setGeometry(50,20,100,40);

    // connections

    QObject::connect ( btnaddtotable, SIGNAL ( clicked() ), this , SLOT(pushButtonClicked())) ;
    QObject::connect ( btnFile, SIGNAL ( clicked() ), this , SLOT(FileButtonClicked())) ;
    QObject::connect ( btnOpenFile, SIGNAL ( clicked() ), this , SLOT(OpenFileButtonClicked()));

    // named the buttons and labels

    myView->setObjectName(QStringLiteral("Table"));
    myView->setGeometry(QRect(20, 100, 361, 191));
    txtname = new QLineEdit(mywidget);
    txtname->setObjectName(QStringLiteral("txtname"));
    txtname->setGeometry(QRect(20, 30, 151, 31));
    txtvalue = new QLineEdit(mywidget);
    txtvalue->setObjectName(QStringLiteral("textEdit"));
    txtvalue->setGeometry(QRect(230, 30, 151, 31));
    label = new QLabel ("Name: ", mywidget );
    label->setObjectName(QStringLiteral("label"));
    label->setGeometry(QRect(20, 10, 61, 20));
    label_2 = new QLabel ("Value ", mywidget );
    label_2->setObjectName(QStringLiteral("label_2"));
    label_2->setGeometry(QRect(235, 10, 51, 20));
    QLabel *label3 = new QLabel ("DateiPfad: ", mywidget );
    label3->setObjectName(QStringLiteral("label"));
    label3->setGeometry(QRect(20, 305, 61, 20));
    txtPfad = new QLineEdit(mywidget);
    txtPfad->setObjectName(QStringLiteral("txtPfad"));
    txtPfad->setGeometry(QRect(80, 300, 300, 31));

    btnaddtotable->setObjectName(QStringLiteral("pushButton"));
    btnaddtotable->setGeometry(QRect(240, 70, 75, 23));
    btnFile->setGeometry(QRect(160, 70, 75, 23));
    btnOpenFile->setGeometry(QRect(80, 70, 75, 23));


    // searching the strings


    this->setGeometry(500,500,400,350);

    // for sorting
    sort_filter = new QSortFilterProxyModel(this);
    sort_filter->setSourceModel(myModel);
    // sort the first column
    sort_filter->sort(0);

    myView->setColumnWidth(0,179);
    myView->setColumnWidth(1,180);
    myView->setModel (sort_filter);
    // to check if exists
    sort_filter->setSourceModel(myModel);
    //myView->setCornerButtonEnabled(true);
    //myView->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
    myView->setAutoScroll(true);
    myView->setAutoScrollMargin(20);
    myView->setHorizontalScrollMode(QAbstractItemView::ScrollPerItem);

}

我是不是忘记了什么？

Answer 1

您有一堆相互重叠的小部件。我建议使用布局，这样你就不会遇到这样的问题。

但主要问题是您的 QWidget *mywidget 对象。您没有为其设置几何图形，因此它最终覆盖了您的 QTableView。例如，如果您将样式表设置为红色背景，您就会看到这种情况发生。