C++ QTableView::render方法代码示例

void DlgCustomizeSpaceball::goPrint()
{
    QTableView *view = new QTableView(this);
    PrintModel *model = new PrintModel(this, buttonModel, commandModel);
    view->horizontalHeader()->setResizeMode(QHeaderView::Fixed);
    view->setModel(model);
    view->horizontalHeader()->resizeSection(0, 150);
    view->horizontalHeader()->resizeSection(1, 300);
    view->resize(600, 600);

    QPrinter printer;
    QPrintDialog printDialog(&printer, this);
    if (printDialog.exec() == QDialog::Accepted)
    {
        QPainter p(&printer);
        view->render(&p);
    }
}

void MainWindow::on_pushButton_clicked()
{
    int current_tab = this->ui->tabWidget->currentIndex();

    QPrinter printer;
    QTableView *myWidget;

    switch(current_tab)
    {
    case TABLE::StudentsTableTab:
        myWidget = this->ui->StudentsTableView;
        break;

    case TABLE::TeachersTableTab:
        myWidget = this->ui->TeachersTableView;
        break;
    default:
        return;
    }

    QPixmap pix = myWidget->grab();
    QPainter painter;
    printer.setResolution(QPrinter::HighResolution);

    printer.setPageMargins (15,15,15,15,QPrinter::Millimeter);
    painter.begin(&printer);
    double xscale = printer.pageRect().width()/double(myWidget->width() + 50);
    double yscale = printer.pageRect().height()/double(myWidget->height() + 50);
    double scale = qMin(xscale, yscale);
    painter.scale(scale, scale);

    painter.drawPixmap(0, 0, pix);
    painter.end();

    myWidget->render(&painter);

}

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);
	}
}

//.........这里部分代码省略.........
#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;
	pageIndexes.append(pageIndexes.last() + accH + headings);
	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);
	total = pageIndexes.size() - 1;
	progress = 0;
	for (i = 0; i < total; i++) {
		if (i > 0)
			printer->newPage();
		QRegion region(0, pageIndexes.at(i) - 1,
			       table.width(),
			       pageIndexes.at(i + 1) - pageIndexes.at(i) + 1);
		table.render(&painter, QPoint(0, 0), region);
		progress++;
		emit signalProgress(done + (progress * 10) / total);
	}
}

void PrintLayout::printProfileDives(int divesPerRow, int divesPerColumn)
{
	int i, row = 0, col = 0, printed = 0, total = estimateTotalDives();
	struct dive *dive;
	if (!total)
		return;

	// setup a painter
	QPainter painter;
	painter.begin(printer);
	painter.setRenderHint(QPainter::Antialiasing);
	painter.setRenderHint(QPainter::SmoothPixmapTransform);
	painter.scale(scaleX, scaleY);

	// setup the profile widget
	ProfileGraphicsView *profile = MainWindow::instance()->graphics();
	const int profileFrameStyle = profile->frameStyle();
	profile->setFrameStyle(QFrame::NoFrame);
	profile->clear();
	profile->setPrintMode(true, !printOptions->color_selected);
	QSize originalSize = profile->size();
	// swap rows/col for landscape
	if (printer->orientation() == QPrinter::Landscape) {
		int swap = divesPerColumn;
		divesPerColumn = divesPerRow;
		divesPerRow = swap;
	}
	// padding in pixels between two dives. no padding if only one dive per page.
	const int padDef = 20;
	const int padW = (divesPerColumn < 2) ? 0 : padDef;
	const int padH = (divesPerRow < 2) ? 0 : padDef;
	// estimate dimensions for a single dive
	const int scaledW = ESTIMATE_DIVE_DIM(scaledPageW, divesPerColumn, padW);
	const int scaledH = ESTIMATE_DIVE_DIM(scaledPageH, divesPerRow, padH);
	// padding in pixels between profile and table
	const int padPT = 5;
	// create a model and table
	ProfilePrintModel model;
	QTableView *table = createProfileTable(&model, scaledW);
	// profilePrintTableMaxH updates after the table is created
	const int tableH = profilePrintTableMaxH;
	// resize the profile widget
	profile->resize(scaledW, scaledH - tableH - padPT);
	// offset table or profile on top
	int yOffsetProfile = 0, yOffsetTable = 0;
	if (printOptions->notes_up)
		yOffsetProfile = tableH + padPT;
	else
		yOffsetTable = scaledH - tableH;

	// plot the dives at specific rows and columns on the page
	for_each_dive(i, dive) {
		if (!dive->selected && printOptions->print_selected)
			continue;
		if (col == divesPerColumn) {
			col = 0;
			row++;
			if (row == divesPerRow) {
				row = 0;
				printer->newPage();
			}
		}
		QTransform origTransform = painter.transform();

		// draw a profile
		painter.translate((scaledW + padW) * col, (scaledH + padH) * row + yOffsetProfile);
		profile->plot(dive, true);
		profile->render(&painter, QRect(0, 0, scaledW, scaledH - tableH - padPT));
		painter.setTransform(origTransform);

		// draw a table
		painter.translate((scaledW + padW) * col, (scaledH + padH) * row + yOffsetTable);
		model.setDive(dive);
		table->render(&painter);
		painter.setTransform(origTransform);
		col++;
		printed++;
		emit signalProgress((printed * 100) / total);
	}

	// cleanup
	painter.end();
	delete table;
	profile->setFrameStyle(profileFrameStyle);
	profile->setPrintMode(false);
	profile->resize(originalSize);
	profile->clear();
	profile->plot(current_dive, true);
}