C++ QTableView::rowHeight方法代码示例

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);
	}
}

void Button::placeButton()
{
    QTableView* table = qobject_cast<QTableView*>(this->parent());
    if (!table)
    {
        setVisible(false);
        return ;
    }

    if (_point.isNull())
    {
        QSize s = table->viewport()->size();
        //qDebug() << s;
        _point = QPoint(s.width(),s.height());
    }

    QAbstractItemModel* model = table->model();
    if (!model)
        return;

    int n,m,bsize1,bsize2,offset1,offset2,point1,point2;
    getSizes(table,model,&m,&n,&bsize1,&bsize2,&point1,&point2,&offset1,&offset2);

    int coord1;
    int coord2 = 0;

    int sizes[m];
    if (_orientation == Qt::Horizontal)
    {
        for (int i=0;i<m;i++)
            sizes[i] = table->columnWidth(i);
        for (int i=0;i<n;i++)
            coord2 += table->rowHeight(i);
    }
    else
    {
        for (int i=0;i<m;i++)
            sizes[i] = table->rowHeight(i);
        for (int i=0;i<n;i++)
            coord2 += table->columnWidth(i);
    }

    if (_type == InsertRemove::Insert)
        nearestBorder(_policy,point1+offset1,sizes,m,&_modelIndex,&coord1);
    else // _type == InsertRemove::Remove
        nearestMiddle(_policy,point1+offset1,sizes,m,&_modelIndex,&coord1);


    coord1 -= bsize1 / 2;

    QSize vp = usefulWidgetSize(table);
    QPoint sh = table->viewport()->mapToParent(QPoint(0,0)); //насколько viewport меньше table

    if (_orientation == Qt::Horizontal)
    {
        if (coord2 - offset2 + bsize2 + sh.y() > vp.height())
            coord2 = vp.height() - bsize2 + offset2 - sh.y();
    }
    else
    {
        if (coord2 - offset2 + bsize2 + sh.x() > vp.width())
            coord2 = vp.width() - bsize2 + offset2 - sh.x();
    }

    if (_orientation == Qt::Horizontal)
    {
        QPoint p = table->viewport()->mapToParent(QPoint(coord1 - offset1,coord2 - offset2));
        setGeometry(QRect(p,size()));
    }
    else
    {
        QPoint p = table->viewport()->mapToParent(QPoint(coord2 - offset2,coord1 - offset1));
        setGeometry(QRect(p,size()));
    }

    if (_type == InsertRemove::Insert)
    {
        setVisible(_modelIndex>=0);
    }
    else
    {
        setVisible((_policy & InsertRemove::RemoveAllowed) && (_modelIndex>-1));
    }

}