滚动条Qt，无法滚动

scrollbar Qt, can't scroll

本文关键字：滚动 Qt 滚动条      更新时间：2023-10-16

谁能告诉我为什么我可以看到滚动条从我的QTableView，但不能使用它?有人知道吗?

我代码:

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);
}

我忘了什么吗?

你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。

但是主要的问题是你的QWidget *mywidget对象。你没有为它设置几何，所以它最终覆盖了你的QTableView。例如，如果你为它设置一个红色背景的样式表，你就会看到这样的效果。

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