C++ QListWidget::setDragDropMode方法代码示例

MainWindow::MainWindow()
{
    QMenu *fileMenu = new QMenu(tr("&File"));

    QAction *quitAction = fileMenu->addAction(tr("E&xit"));
    quitAction->setShortcut(tr("Ctrl+Q"));

    menuBar()->addMenu(fileMenu);

//  For convenient quoting:
//! [0]
QListWidget *listWidget = new QListWidget(this);
listWidget->setSelectionMode(QAbstractItemView::SingleSelection);
listWidget->setDragEnabled(true);
listWidget->viewport()->setAcceptDrops(true);
listWidget->setDropIndicatorShown(true);
//! [0] //! [1]
listWidget->setDragDropMode(QAbstractItemView::InternalMove);
//! [1]

    this->listWidget = listWidget;

    connect(quitAction, SIGNAL(triggered()), this, SLOT(close()));

    setupListItems();

    setCentralWidget(listWidget);
    setWindowTitle(tr("List Widget"));
}

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    // QListWidget
    QListWidget listWidget;
    // 一种添加项目的简便方法
    new QListWidgetItem("a", &listWidget);
    // 添加项目的另一种方法，这样还可以进行各种设置
    QListWidgetItem *listWidgetItem = new QListWidgetItem;
    listWidgetItem->setText("b");
    listWidgetItem->setIcon(QIcon("../modelView2/yafeilinux.png"));
    listWidgetItem->setToolTip("this is b!");
    listWidget.insertItem(1, listWidgetItem);
    // 设置排序为倒序
    listWidget.sortItems(Qt::DescendingOrder);
    // 显示列表部件
    listWidget.show();

    // QTreeWidget
    QTreeWidget treeWidget;
    // 必须设置列数
    treeWidget.setColumnCount(2);
    // 设置标头
    QStringList headers;
    headers << "name" << "year";
    treeWidget.setHeaderLabels(headers);
    // 添加项目
    QTreeWidgetItem *grade1 = new QTreeWidgetItem(&treeWidget);
    grade1->setText(0,"Grade1");
    QTreeWidgetItem *student = new QTreeWidgetItem(grade1);
    student->setText(0,"Tom");
    student->setText(1,"1986");
    QTreeWidgetItem *grade2 = new QTreeWidgetItem(&treeWidget, grade1);
    grade2->setText(0,"Grade2");
    treeWidget.show();

    // QTableWidget
    // 创建表格部件，同时指定行数和列数
    QTableWidget tableWidget(3, 2);
    // 创建表格项目，并插入到指定单元
    QTableWidgetItem *tableWidgetItem = new QTableWidgetItem("qt");
    tableWidget.setItem(1, 1, tableWidgetItem);
    // 创建表格项目，并将它们作为标头
    QTableWidgetItem *headerV = new QTableWidgetItem("first");
    tableWidget.setVerticalHeaderItem(0,headerV);
    QTableWidgetItem *headerH = new QTableWidgetItem("ID");
    tableWidget.setHorizontalHeaderItem(0,headerH);
    tableWidget.show();

    // 为listWidget启用拖放
    // 设置选择模式为单选
    listWidget.setSelectionMode(QAbstractItemView::SingleSelection);
    // 启用拖动
    listWidget.setDragEnabled(true);
    // 设置接受拖放
    listWidget.viewport()->setAcceptDrops(true);
    // 设置显示将要被放置的位置
    listWidget.setDropIndicatorShown(true);
    // 设置拖放模式为移动项目，如果不设置，默认为复制项目
    listWidget.setDragDropMode(QAbstractItemView::InternalMove);

    return app.exec();
}

//.........这里部分代码省略.........
        line_2->setObjectName(QStringLiteral("line_2"));
        line_2->setFrameShape(QFrame::HLine);
        line_2->setFrameShadow(QFrame::Sunken);

        verticalLayout_2->addWidget(line_2);

        cbMute = new QCheckBox(MVPPlayerRemoteDialog);
        cbMute->setObjectName(QStringLiteral("cbMute"));
        cbMute->setChecked(true);

        verticalLayout_2->addWidget(cbMute);

        verticalLayout = new QVBoxLayout();
        verticalLayout->setObjectName(QStringLiteral("verticalLayout"));
        verticalLayout->setSizeConstraint(QLayout::SetNoConstraint);
        horizontalLayout_2 = new QHBoxLayout();
        horizontalLayout_2->setObjectName(QStringLiteral("horizontalLayout_2"));
        label = new QLabel(MVPPlayerRemoteDialog);
        label->setObjectName(QStringLiteral("label"));

        horizontalLayout_2->addWidget(label);

        lblCurrentTrack = new QLabel(MVPPlayerRemoteDialog);
        lblCurrentTrack->setObjectName(QStringLiteral("lblCurrentTrack"));
        QSizePolicy sizePolicy2(QSizePolicy::MinimumExpanding, QSizePolicy::Minimum);
        sizePolicy2.setHorizontalStretch(0);
        sizePolicy2.setVerticalStretch(0);
        sizePolicy2.setHeightForWidth(lblCurrentTrack->sizePolicy().hasHeightForWidth());
        lblCurrentTrack->setSizePolicy(sizePolicy2);
        lblCurrentTrack->setWordWrap(true);

        horizontalLayout_2->addWidget(lblCurrentTrack);

        lblTrackLength = new QLabel(MVPPlayerRemoteDialog);
        lblTrackLength->setObjectName(QStringLiteral("lblTrackLength"));
        lblTrackLength->setAlignment(Qt::AlignCenter);

        horizontalLayout_2->addWidget(lblTrackLength);


        verticalLayout->addLayout(horizontalLayout_2);

        horizontalLayout_3 = new QHBoxLayout();
        horizontalLayout_3->setObjectName(QStringLiteral("horizontalLayout_3"));
        sliderPosition = new QSlider(MVPPlayerRemoteDialog);
        sliderPosition->setObjectName(QStringLiteral("sliderPosition"));
        sliderPosition->setMaximum(100);
        sliderPosition->setOrientation(Qt::Horizontal);
        sliderPosition->setInvertedAppearance(false);
        sliderPosition->setInvertedControls(false);
        sliderPosition->setTickPosition(QSlider::TicksBelow);
        sliderPosition->setTickInterval(1);

        horizontalLayout_3->addWidget(sliderPosition);


        verticalLayout->addLayout(horizontalLayout_3);

        horizontalLayout_5 = new QHBoxLayout();
        horizontalLayout_5->setObjectName(QStringLiteral("horizontalLayout_5"));
        btnClearPlaylist = new QToolButton(MVPPlayerRemoteDialog);
        btnClearPlaylist->setObjectName(QStringLiteral("btnClearPlaylist"));
        QIcon icon1;
        icon1.addFile(QStringLiteral(":/mvpplayer/action/cancel.png"), QSize(), QIcon::Normal, QIcon::Off);
        btnClearPlaylist->setIcon(icon1);

        horizontalLayout_5->addWidget(btnClearPlaylist);

        lblPlaylist = new QLabel(MVPPlayerRemoteDialog);
        lblPlaylist->setObjectName(QStringLiteral("lblPlaylist"));

        horizontalLayout_5->addWidget(lblPlaylist);


        verticalLayout->addLayout(horizontalLayout_5);

        playlist = new QListWidget(MVPPlayerRemoteDialog);
        playlist->setObjectName(QStringLiteral("playlist"));
        QSizePolicy sizePolicy3(QSizePolicy::Expanding, QSizePolicy::Maximum);
        sizePolicy3.setHorizontalStretch(0);
        sizePolicy3.setVerticalStretch(0);
        sizePolicy3.setHeightForWidth(playlist->sizePolicy().hasHeightForWidth());
        playlist->setSizePolicy(sizePolicy3);
        playlist->setDragDropMode(QAbstractItemView::DropOnly);

        verticalLayout->addWidget(playlist);


        verticalLayout_2->addLayout(verticalLayout);


        verticalLayout_4->addLayout(verticalLayout_2);

        QWidget::setTabOrder(cbMute, sliderPosition);
        QWidget::setTabOrder(sliderPosition, playlist);

        retranslateUi(MVPPlayerRemoteDialog);

        QMetaObject::connectSlotsByName(MVPPlayerRemoteDialog);
    } // setupUi