C++ QTableView::setItemDelegate方法代码示例

//! [0]
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QStandardItemModel model(4, 2);
    QTableView tableView;
    tableView.setModel(&model);

    SpinBoxDelegate delegate;
    tableView.setItemDelegate(&delegate);
//! [0]

    tableView.horizontalHeader()->setStretchLastSection(true);

//! [1]
    for (int row = 0; row < 4; ++row) {
        for (int column = 0; column < 2; ++column) {
            QModelIndex index = model.index(row, column, QModelIndex());
            model.setData(index, QVariant((row+1) * (column+1)));
        }
//! [1] //! [2]
    }
//! [2]

//! [3]
    tableView.setWindowTitle(QObject::tr("Spin Box Delegate"));
    tableView.show();
    return app.exec();
}

/*!
    Create and return the table used to visualize digital signals.
*/
QTableView* UiDigitalGenerator::createTable()
{
    // Deallocation: "Qt Object trees" (See UiMainWindow)
    QTableView* table = new QTableView(this);

    QItemSelectionModel* m = table->selectionModel();
    if (m != NULL) delete m;
    table->setModel(mSignals);

    // Deallocation: "Qt Object trees" (See UiMainWindow)
    DigitalDelegate* delegate = new DigitalDelegate(this);
    QAbstractItemDelegate* d = table->itemDelegate();
    if (d != NULL) delete d;
    table->setItemDelegate(delegate);

    table->resizeColumnsToContents();
    table->resizeRowsToContents();

    connect(table->selectionModel(),
            SIGNAL(selectionChanged(QItemSelection,QItemSelection)),
            this,
            SLOT(handleSelectionChanged(QItemSelection,QItemSelection)));


    return table;
}

QTableView* EkonTables::createRelationTableView(QWidget *parentWidget, QSqlRelationalTableModel *model)
{
    QTableView *tableView = createTableView(parentWidget, model);
    tableView->setItemDelegate(new QSqlRelationalDelegate(tableView));

    return tableView;
}

ErrorListView::ErrorListView(QWidget* parent)
  : QWidget(parent),
    m_model(0)
{
    m_model = new ErrorListModel(this);
    
    QTableView* tableView = new QTableView;
    
    tableView->setItemDelegate(new ItemDelegate);
    tableView->setSelectionBehavior(QAbstractItemView::SelectRows);
    tableView->setAlternatingRowColors(true);
    tableView->setShowGrid(false);
    tableView->verticalHeader()->hide();
    
    tableView->setModel(m_model);
    
#ifdef STROMX_STUDIO_QT4
    tableView->horizontalHeader()->setResizeMode(ErrorListModel::TIME, QHeaderView::Interactive);
    tableView->horizontalHeader()->setResizeMode(ErrorListModel::DESCRIPTION, QHeaderView::Stretch);
#else
    tableView->horizontalHeader()->setSectionResizeMode(ErrorListModel::TIME, QHeaderView::Interactive);
    tableView->horizontalHeader()->setSectionResizeMode(ErrorListModel::DESCRIPTION, QHeaderView::Stretch);
#endif // STROMX_STUDIO_QT4
    
    QPushButton* clearButton = new QPushButton(tr("Clear error log"));
    connect(clearButton, SIGNAL(clicked()), m_model, SLOT(clear()));
    QHBoxLayout* buttonLayout = new QHBoxLayout;
    buttonLayout->addWidget(clearButton);
    buttonLayout->addStretch();
    
    QVBoxLayout* mainLayout = new QVBoxLayout;
    mainLayout->addWidget(tableView);
    mainLayout->addLayout(buttonLayout);
    setLayout(mainLayout);
}

void tst_QItemDelegate::QTBUG4435_keepSelectionOnCheck()
{
    QStandardItemModel model(3, 1);
    for (int i = 0; i < 3; ++i) {
        QStandardItem *item = new QStandardItem(QLatin1String("Item ") + QString::number(i));
        item->setCheckable(true);
        item->setFlags(Qt::ItemIsSelectable | Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
        model.setItem(i, item);
    }
    QTableView view;
    view.setModel(&model);
    view.setItemDelegate(new TestItemDelegate);
    view.show();
    view.selectAll();
    QVERIFY(QTest::qWaitForWindowExposed(&view));
    QStyleOptionViewItem option;
    option.rect = view.visualRect(model.index(0, 0));
    // mimic QStyledItemDelegate::initStyleOption logic
    option.features = QStyleOptionViewItem::HasDisplay | QStyleOptionViewItem::HasCheckIndicator;
    option.checkState = Qt::CheckState(model.index(0, 0).data(Qt::CheckStateRole).toInt());
    const int checkMargin = qApp->style()->pixelMetric(QStyle::PM_FocusFrameHMargin, 0, 0) + 1;
    QPoint pos = qApp->style()->subElementRect(QStyle::SE_ViewItemCheckIndicator, &option, 0).center()
                 + QPoint(checkMargin, 0);
    QTest::mouseClick(view.viewport(), Qt::LeftButton, Qt::ControlModifier, pos);
    QTRY_VERIFY(view.selectionModel()->isColumnSelected(0, QModelIndex()));
    QCOMPARE(model.item(0)->checkState(), Qt::Checked);
}

QTableView *createView(const QString &title, QSqlTableModel *model)
{
	QTableView *view = new QTableView;
	view->setModel(model);
	view->setItemDelegate(new QSqlRelationalDelegate(view));
	view->setWindowTitle(title);
	return view;
}

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

  QTableView* table = new QTableView();
  TableModel* model = new TableModel(table);
  MultipleSelectDelegate* delegate = new MultipleSelectDelegate(table);
  table->setModel(model);
  table->setItemDelegate(delegate);
  table->show();

  return app.exec();
}

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QTableView tv;
    QStandardItemModel m;
    m.setRowCount(4);
    m.setColumnCount(2);
    tv.setModel(&m);
    tv.show();
    tv.setItemDelegate(new ExampleDelegate());
    app.exec();
}

Departments::Departments(QSqlDatabase& db, QWidget *parent): QDialog(parent),
    ui(new Ui::Departments), _db(&db) {
  ui->setupUi(this);

  _searchAgain = true;

  _model = new QSqlRelationalTableModel(this, *_db);
  _model->setTable("departments");
  _model->setEditStrategy(QSqlTableModel::OnFieldChange);
  _model->setRelation(2, QSqlRelation("faculties", "fc_id", "fc_name"));
  reloadTable();

  QTableView* view = ui->tableView;
  view->setModel(_model);
  view->setItemDelegate(new QSqlRelationalDelegate(view));
}

Widget::Widget(QWidget *parent)
    : QWidget(parent)
{
    resize(400,300);
    if(connect())
    {
        QTableView *view = new QTableView(this);
        QSqlRelationalTableModel *model = new QSqlRelationalTableModel;//要先有数据才能创建model,也就是先连接数据库局
        view->setGeometry(0,0,400,300);

        view->setModel(model);
        model->setTable("student");
        model->setSort(0,Qt::AscendingOrder);
//        model->setHeaderData(0,Qt::Horizontal,"Name");//from 0
//        model->setHeaderData(1,Qt::Horizontal,"Age");
//        model->setHeaderData(2,Qt::Horizontal,"likes");
        model->setRelation(3,QSqlRelation("city","id","name"));
        model->select();


//        view->setModel(model);

        view->setSelectionMode(QAbstractItemView::SingleSelection);//设置选择模式
        view->setSelectionBehavior(QAbstractItemView::SelectRows);//选择行
//        view->resizeColumnsToContents();//tiaozhengziti
        view->setEditTriggers(QAbstractItemView::DoubleClicked);//不可编辑?

        QHeaderView *header =  view->horizontalHeader();
        header->setStretchLastSection(true);
        view->setItemDelegate(new QSqlRelationalDelegate(view));
//        QHeaderView *head = view->verticalHeader();
//        head->setStretchLastSection(true);
//        view->show();
//        this?->show();
    }
}

MainWindow::MainWindow(QWidget* parent, Qt::WindowFlags f) :
	QMainWindow(parent, f),
	configurationModels(),
	geometryModels(),
	ikAlgorithmComboBox(new QComboBox(this)),
	ikDurationSpinBox(new QSpinBox(this)),
	ikIterationsSpinBox(new QSpinBox(this)),
	ikJacobianComboBox(new QComboBox(this)),
	kinematicModels(),
	operationalModels(),
	scene(),
	configurationDelegates(),
	configurationDockWidget(new QDockWidget(this)),
	configurationTabWidget(new QTabWidget(this)),
	configurationViews(),
	gradientBackground(),
	operationalDelegates(),
	operationalDockWidget(new QDockWidget(this)),
	operationalTabWidget(new QTabWidget(this)),
	operationalViews(),
	saveImageWithAlphaAction(new QAction(this)),
	saveImageWithoutAlphaAction(new QAction(this)),
	saveSceneAction(new QAction(this)),
	server(new Server(this)),
	viewer(nullptr)
{
	MainWindow::singleton = this;
	
	SoQt::init(this);
	SoDB::init();
	SoGradientBackground::initClass();
	
	std::shared_ptr<rl::sg::Factory> geometryFactory;
	std::string geometryFilename = QApplication::arguments()[1].toStdString();
	
	if ("urdf" == geometryFilename.substr(geometryFilename.length() - 4, 4))
	{
		geometryFactory = std::make_shared<rl::sg::UrdfFactory>();
	}
	else
	{
		geometryFactory = std::make_shared<rl::sg::XmlFactory>();
	}
	
	this->scene = std::make_shared<rl::sg::so::Scene>();
	geometryFactory->load(geometryFilename, this->scene.get());
	
	for (int i = 2; i < QApplication::arguments().size(); ++i)
	{
		std::shared_ptr<rl::mdl::Factory> kinematicFactory;
		std::string kinematicFilename = QApplication::arguments()[i].toStdString();
		
		if ("urdf" == kinematicFilename.substr(kinematicFilename.length() - 4, 4))
		{
			kinematicFactory = std::make_shared<rl::mdl::UrdfFactory>();
		}
		else
		{
			kinematicFactory = std::make_shared<rl::mdl::XmlFactory>();
		}
		
		this->geometryModels.push_back(this->scene->getModel(i - 2));
		this->kinematicModels.push_back(std::dynamic_pointer_cast<rl::mdl::Kinematic>(kinematicFactory->create(kinematicFilename)));
	}
	
	for (std::size_t i = 0; i < this->kinematicModels.size(); ++i)
	{
		ConfigurationDelegate* configurationDelegate = new ConfigurationDelegate(this);
		configurationDelegate->id = i;
		this->configurationDelegates.push_back(configurationDelegate);
		
		ConfigurationModel* configurationModel = new ConfigurationModel(this);
		configurationModel->id = i;
		this->configurationModels.push_back(configurationModel);
		
		QTableView* configurationView = new QTableView(this);
#if QT_VERSION >= 0x050000
		configurationView->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
#else // QT_VERSION
		configurationView->horizontalHeader()->setResizeMode(QHeaderView::Stretch);
#endif // QT_VERSION
		configurationView->horizontalHeader()->hide();
		configurationView->setAlternatingRowColors(true);
		configurationView->setItemDelegate(configurationDelegate);
		configurationView->setModel(configurationModel);
		this->configurationViews.push_back(configurationView);
		
		this->configurationTabWidget->addTab(configurationView, QString::number(i));
		
		OperationalDelegate* operationalDelegate = new OperationalDelegate(this);
		this->operationalDelegates.push_back(operationalDelegate);
		
		OperationalModel* operationalModel = new OperationalModel(this);
		operationalModel->id = i;
		this->operationalModels.push_back(operationalModel);
		
		QTableView* operationalView = new QTableView(this);
#if QT_VERSION >= 0x050000
		operationalView->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
#else // QT_VERSION
//.........这里部分代码省略.........

/* we create a table that has a fixed height, but can stretch to fit certain width */
QTableView *PrintLayout::createProfileTable(ProfilePrintModel *model, const int tableW)
{
	// setup a new table
	QTableView *table = new QTableView();
	QHeaderView *vHeader = table->verticalHeader();
	QHeaderView *hHeader = table->horizontalHeader();
	table->setAttribute(Qt::WA_DontShowOnScreen);
	table->setSelectionMode(QAbstractItemView::NoSelection);
	table->setFocusPolicy(Qt::NoFocus);
	table->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
	table->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
	hHeader->setVisible(false);
	vHeader->setVisible(false);
#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
	hHeader->setResizeMode(QHeaderView::Fixed);
	vHeader->setResizeMode(QHeaderView::Fixed);
#else
	hHeader->setSectionResizeMode(QHeaderView::Fixed);
	vHeader->setSectionResizeMode(QHeaderView::Fixed);
#endif
	// set the model
	table->setModel(model);

	/* setup cell span for the table using QTableView::setSpan().
	 * changes made here reflect on ProfilePrintModel::data(). */
	const int cols = model->columnCount();
	const int rows = model->rowCount();
	// info on top
	table->setSpan(0, 0, 1, 4);
	table->setSpan(1, 0, 1, 4);
	// gas used
	table->setSpan(2, 0, 1, 2);
	table->setSpan(3, 0, 1, 2);
	// notes
	table->setSpan(6, 0, 1, 5);
	table->setSpan(7, 0, 5, 5);

	/* resize row heights to the 'profilePrintRowHeights' indexes.
	 * profilePrintTableMaxH will then hold the table height. */
	int i;
	profilePrintTableMaxH = 0;
	for (i = 0; i < rows; i++) {
		int h = profilePrintRowHeights.at(i);
		profilePrintTableMaxH += h;
		vHeader->resizeSection(i, h);
	}
	// resize columns. columns widths are percentages from the table width.
	int accW = 0;
	for (i = 0; i < cols; i++) {
		int pw = qCeil((qreal)(profilePrintColumnWidths.at(i) * tableW) / 100.0);
		accW += pw;
		if (i == cols - 1 && accW > tableW) /* adjust last column */
			pw -= accW - tableW;
		hHeader->resizeSection(i, pw);
	}
	// resize
	table->resize(tableW, profilePrintTableMaxH);
	// hide the grid and set a stylesheet
	table->setItemDelegate(new ProfilePrintDelegate(this));
	table->setShowGrid(false);
	table->setStyleSheet(
		"QTableView { border: none }"
		"QTableView::item { border: 0px; padding-left: 2px; padding-right: 2px; }");
	// return
	return table;
}