C++ QColumnView::setModel方法代码示例

void tst_QColumnView::sizes()
{
    QColumnView view;
    QCOMPARE(view.columnWidths().count(), 0);

    QList<int> newSizes;
    newSizes << 10 << 4 << 50 << 6;

    QList<int> visibleSizes;
    view.setColumnWidths(newSizes);
    QCOMPARE(view.columnWidths(), visibleSizes);

    QDirModel model;
    view.setModel(&model);
    QModelIndex home = model.index(QDir::homePath());
    view.setCurrentIndex(home);

    QList<int> postSizes = view.columnWidths().mid(0, newSizes.count());
    QCOMPARE(postSizes, newSizes.mid(0, postSizes.count()));

    QVERIFY(view.columnWidths().count() > 1);
    QList<int> smallerSizes;
    smallerSizes << 6;
    view.setColumnWidths(smallerSizes);
    QList<int> expectedSizes = newSizes;
    expectedSizes[0] = 6;
    postSizes = view.columnWidths().mid(0, newSizes.count());
    QCOMPARE(postSizes, expectedSizes.mid(0, postSizes.count()));
}

void tst_QColumnView::grips()
{
    QColumnView view;
    QDirModel model;
    view.setModel(&model);
    QCOMPARE(view.resizeGripsVisible(), true);

    view.setResizeGripsVisible(true);
    QCOMPARE(view.resizeGripsVisible(), true);

    {
        const QObjectList list = view.viewport()->children();
        for (int i = 0 ; i < list.count(); ++i) {
            if (QAbstractItemView *view = qobject_cast<QAbstractItemView*>(list.at(i)))
                QVERIFY(view->cornerWidget() != 0);
        }
    }
    view.setResizeGripsVisible(false);
    QCOMPARE(view.resizeGripsVisible(), false);

    {
        const QObjectList list = view.viewport()->children();
        for (int i = 0 ; i < list.count(); ++i) {
            if (QAbstractItemView *view = qobject_cast<QAbstractItemView*>(list.at(i))) {
                if (view->isVisible())
                    QVERIFY(view->cornerWidget() == 0);
            }
        }
    }

    view.setResizeGripsVisible(true);
    QCOMPARE(view.resizeGripsVisible(), true);
}

void tst_QColumnView::swapPreview()
{
    // swap the preview widget in updatePreviewWidget
    QColumnView view;
    QStringList sl;
    sl << QLatin1String("test");
    QStringListModel model(sl);
    view.setModel(&model);
    view.setCurrentIndex(view.indexAt(QPoint(1, 1)));
    connect(&view, SIGNAL(updatePreviewWidget(const QModelIndex &)),
            this, SLOT(setPreviewWidget()));
    view.setCurrentIndex(view.indexAt(QPoint(1, 1)));
    QTest::qWait(ANIMATION_DELAY);
    qApp->processEvents();
}

void tst_QColumnView::indexAt()
{
    QColumnView view;
    QCOMPARE(view.indexAt(QPoint(0,0)), QModelIndex());
    QDirModel model;
    view.setModel(&model);

    QModelIndex home = model.index(QDir::homePath());
    QModelIndex homeFile = model.index(0, 0, home);
    if (!homeFile.isValid())
        return;
    view.setRootIndex(home);
    QRect rect = view.visualRect(QModelIndex());
    QVERIFY(!rect.isValid());
    rect = view.visualRect(homeFile);
    QVERIFY(rect.isValid());

    QModelIndex child;
    for (int i = 0; i < model.rowCount(home); ++i) {
        child = model.index(i, 0, home);
        rect = view.visualRect(child);
        QVERIFY(rect.isValid());
        if (i > 0)
            QVERIFY(rect.top() > 0);
        QCOMPARE(view.indexAt(rect.center()), child);

        view.selectionModel()->select(child, QItemSelectionModel::SelectCurrent);
        view.setCurrentIndex(child);
        qApp->processEvents();
        QTest::qWait(200);

        // test that the second row doesn't start at 0
        if (model.rowCount(child) > 0) {
            child = model.index(0, 0, child);
            QVERIFY(child.isValid());
            rect = view.visualRect(child);
            QVERIFY(rect.isValid());
            QVERIFY(rect.left() > 0);
            QCOMPARE(view.indexAt(rect.center()), child);
            break;
        }
    }
}

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

    QStandardItem *name = new QStandardItem("Name");
    QStandardItem *firstName = new QStandardItem("First Name");
    QStandardItem *lastName = new QStandardItem("Last Name");

    name->appendRow(firstName);
    name->appendRow(lastName);
    model.appendRow(name);

    QStandardItem *john = new QStandardItem("John");
    QStandardItem *smith = new QStandardItem("Smith");

    firstName->appendRow(john);
    lastName->appendRow(smith);

    QStandardItem *address = new QStandardItem("Address");
    QStandardItem *street = new QStandardItem("Street");
    QStandardItem *city = new QStandardItem("City");
    QStandardItem *state = new QStandardItem("State");
    QStandardItem *country = new QStandardItem("Country");

    address->appendRow(street);
    address->appendRow(city);
    address->appendRow(state);
    address->appendRow(country);
    model.appendRow(address);

    QColumnView columnView;
    columnView.setModel(&model);
    columnView.show();

    return app.exec();
}

void tst_QColumnView::preview()
{
    QColumnView view;
    QCOMPARE(view.previewWidget(), (QWidget*)0);
    TreeModel model;
    view.setModel(&model);
    QCOMPARE(view.previewWidget(), (QWidget*)0);
    QModelIndex home = model.index(0, 0);
    QVERIFY(home.isValid());
    QVERIFY(model.hasChildren(home));
    view.setCurrentIndex(home);
    QCOMPARE(view.previewWidget(), (QWidget*)0);

    QModelIndex file;
    QVERIFY(model.rowCount(home) > 0);
    for (int i = 0; i < model.rowCount(home); ++i) {
        if (!model.hasChildren(model.index(i, 0, home))) {
            file = model.index(i, 0, home);
            break;
        }
    }
    QVERIFY(file.isValid());
    view.setCurrentIndex(file);
    QVERIFY(view.previewWidget() != (QWidget*)0);

    QWidget *previewWidget = new QWidget(&view);
    view.setPreviewWidget(previewWidget);
    QCOMPARE(view.previewWidget(), previewWidget);
    QVERIFY(previewWidget->parent() != ((QWidget*)&view));
    view.setCurrentIndex(home);

    // previewWidget should be marked for deletion
    QWidget *previewWidget2 = new QWidget(&view);
    view.setPreviewWidget(previewWidget2);
    QCOMPARE(view.previewWidget(), previewWidget2);
}