C++ QTableView::setAttribute方法代码示例

void ModelTestWidget::showViewContextMenu(const QPoint &pos)
{
    const QModelIndex idx = m_handler->flatView()->indexAt(pos);
    if (!idx.isValid())
        return;

    QMenu menu;
    QAction *showCostItems = menu.addAction("show cost items");

    const ParseData* data = m_handler->dataModel()->parseData();

    QAction *ret = menu.exec(m_handler->flatView()->mapToGlobal(pos));
    if (ret == showCostItems) {
        ///TODO: put this into a reusable class?
        const Function *func = idx.data(DataModel::FunctionRole).value<const Function *>();
        Q_ASSERT(func);

        QTableView *view = new QTableView();
        view->setAttribute(Qt::WA_DeleteOnClose, true);
        const int rows = func->costItems().size();
        const int columns = data->events().size() + data->positions().size() + 2;
        QStandardItemModel *model = new QStandardItemModel(rows, columns, view);
        int headerColumn = 0;
        foreach (const QString &event, data->events()) {
            model->setHeaderData(headerColumn++, Qt::Horizontal, event);
        }
        const int lastEventColumn = headerColumn;
        foreach (const QString &pos, data->positions()) {
            model->setHeaderData(headerColumn++, Qt::Horizontal, pos);
        }
        const int lastPosColumn = headerColumn;
        model->setHeaderData(headerColumn++, Qt::Horizontal, "Call");
        model->setHeaderData(headerColumn++, Qt::Horizontal, "Differring File");
        Q_ASSERT(headerColumn == columns);

        QVector<quint64> totalCosts;
        totalCosts.fill(0, data->events().size());
        for (int row = 0; row < rows; ++row) {
            const CostItem *item = func->costItems().at(row);
            for (int column = 0; column < columns; ++column) {
                QVariant value;
                if (column < lastEventColumn) {
                    value = item->cost(column);
                    totalCosts[column] += item->cost(column);
                } else if (column < lastPosColumn) {
                    value = item->position(column - lastEventColumn);
                } else if (column == lastPosColumn) {
                    if (item->call())
                        value = item->call()->callee()->name();
                } else {
                    value = item->differingFile();
                }
                model->setData(model->index(row, column), value);
            }
        }
        QStringList totalCostsStrings;
        for (int i = 0; i < totalCosts.size(); ++i) {
            totalCostsStrings << QString("%1: %2").arg(totalCosts.at(i)).arg(data->events().at(i));
        }
        view->setWindowTitle(totalCostsStrings.join(QLatin1String(", ")));
        view->setModel(model);
        view->show();
    }
}

void PrintLayout::printTable()
{
	struct dive *dive;
	int done = 0; // percents done
	int i, row = 0, progress, total = estimateTotalDives();
	if (!total)
		return;

	// create and setup a table
	QTableView table;
	table.setAttribute(Qt::WA_DontShowOnScreen);
	table.setSelectionMode(QAbstractItemView::NoSelection);
	table.setFocusPolicy(Qt::NoFocus);
	table.horizontalHeader()->setVisible(false);
	table.verticalHeader()->setVisible(false);
#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
	table.horizontalHeader()->setResizeMode(QHeaderView::Fixed);
	table.verticalHeader()->setResizeMode(QHeaderView::ResizeToContents);
#else
	table.horizontalHeader()->setSectionResizeMode(QHeaderView::Fixed);
	table.verticalHeader()->setSectionResizeMode(QHeaderView::ResizeToContents);
#endif
	table.setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
	table.setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
	// fit table to one page initially
	table.resize(scaledPageW, scaledPageH);

	// don't show border
	table.setStyleSheet(
		"QTableView { border: none }");

	// create and fill a table model
	TablePrintModel model;
	addTablePrintHeadingRow(&model, row); // add one heading row
	row++;
	progress = 0;
	for_each_dive(i, dive) {
		if (!dive->selected && printOptions->print_selected)
			continue;
		addTablePrintDataRow(&model, row, dive);
		row++;
		progress++;
		emit signalProgress((progress * 10) / total);
	}
	done = 10;
	table.setModel(&model); // set model to table
	// resize columns to percentages from page width
	int accW = 0;
	int cols = model.columns;
	int tableW = table.width();
	for (i = 0; i < model.columns; i++) {
		int pw = qCeil((qreal)(tablePrintColumnWidths.at(i) * table.width()) / 100.0);
		accW += pw;
		if (i == cols - 1 && accW > tableW) /* adjust last column */
			pw -= accW - tableW;
		table.horizontalHeader()->resizeSection(i, pw);
	}
	// reset the model at this point
	model.callReset();

	// a list of vertical offsets where pages begin and some helpers
	QList<unsigned int> pageIndexes;
	pageIndexes.append(0);

	/* the algorithm bellow processes the table rows in multiple passes,
	 * compensating for loss of space due to moving rows on a new page instead
	 * of truncating them.
	 * there is a 'passes' array defining how much percents of the total
	 * progress each will take. given, the first and last stage of this function
	 * use 10% each, then the sum of passes[] here should be 80%.
	 * two should be enough! */
	const int passes[] = { 70, 10 };
	int tableHeight = 0, lastAccIndex = 0, rowH, accH, headings;
	bool isHeading = false;

	for (unsigned int pass = 0; pass < sizeof(passes) / sizeof(passes[0]); pass++) {
		progress = headings = accH = 0;
		total = model.rows - lastAccIndex;
		for (i = lastAccIndex; i < model.rows; i++) {
			rowH = table.rowHeight(i);
			accH += rowH;
			if (isHeading) {
				headings += rowH;
				isHeading = false;
			}
			if (accH > scaledPageH) {
				lastAccIndex = i;
				pageIndexes.append(pageIndexes.last() + (accH - rowH));
				addTablePrintHeadingRow(&model, i);
				isHeading = true;
				accH = 0;
				i--;
			}
			tableHeight += table.rowHeight(i);
			progress++;
			emit signalProgress(done + (progress * passes[pass]) / total);
		}
		done += passes[pass];
	}
	done = 90;
//.........这里部分代码省略.........

void PrintLayout::printTable()
{
	// create and setup a table
	QTableView table;
	table.setAttribute(Qt::WA_DontShowOnScreen);
	table.setSelectionMode(QAbstractItemView::NoSelection);
	table.setFocusPolicy(Qt::NoFocus);
	table.horizontalHeader()->setVisible(false);
	table.horizontalHeader()->setResizeMode(QHeaderView::Fixed);
	table.verticalHeader()->setVisible(false);
	table.verticalHeader()->setResizeMode(QHeaderView::ResizeToContents);
	table.setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
	table.setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
	// fit table to one page initially
	table.resize(scaledPageW,  scaledPageH);

	// create and fill a table model
	TablePrintModel model;
	struct dive *dive;
	int i, row = 0;
	addTablePrintHeadingRow(&model, row); // add one heading row
	row++;
	for_each_dive(i, dive) {
		if (!dive->selected && printOptions->print_selected)
			continue;
		addTablePrintDataRow(&model, row, dive);
		row++;
	}
	table.setModel(&model); // set model to table
	// resize columns to percentages from page width
	for (int i = 0; i < model.columns; i++) {
		int pw = qCeil((qreal)(tablePrintColumnWidths.at(i) * table.width()) / 100);
		table.horizontalHeader()->resizeSection(i, pw);
	}
	// reset the model at this point
	model.callReset();

	// a list of vertical offsets where pages begin and some helpers
	QList<unsigned int> pageIndexes;
	pageIndexes.append(0);
	int tableHeight = 0, rowH = 0, accH = 0;

	// process all rows
	for (int i = 0; i < model.rows; i++) {
		rowH = table.rowHeight(i);
		accH += rowH;
		if (accH > scaledPageH) { // push a new page index and add a heading
			pageIndexes.append(pageIndexes.last() + (accH - rowH));
			addTablePrintHeadingRow(&model, i);
			accH = 0;
			i--;
		}
		tableHeight += rowH;
	}
	pageIndexes.append(pageIndexes.last() + accH);
	// resize the whole widget so that it can be rendered
	table.resize(scaledPageW, tableHeight);

	// attach a painter and render pages by using pageIndexes
	QPainter painter(printer);
	painter.setRenderHint(QPainter::Antialiasing);
	painter.setRenderHint(QPainter::SmoothPixmapTransform);
	painter.scale(scaleX, scaleY);
	for (int i = 0; i < pageIndexes.size() - 1; i++) {
		if (i > 0)
			printer->newPage();
		QRegion region(0, pageIndexes.at(i) - 1,
		               table.width(),
		               pageIndexes.at(i + 1) - pageIndexes.at(i) + 2);
		table.render(&painter, QPoint(0, 0), region);
	}
}

/* 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;
}