Method showSparklines

src/frontend/spreadsheet/SpreadsheetView.cpp:1170–1178

Shows (\c on=true) or hides (\c on=false) the column sparkline in the horizontal header

//! Shows (\c on=true) or hides (\c on=false) the column sparkline in the horizontal header
void SpreadsheetView::showSparklines(bool on) {
	m_horizontalHeader->showSparklines(on);
	if (action_toggle_sparklines) {
		if (on)
			action_toggle_sparklines->setText(i18n("Hide Sparklines"));
		else
			action_toggle_sparklines->setText(i18n("Show Sparklines"));
	}
}

void SpreadsheetView::handleHeaderDataChanged(Qt::Orientation orientation, int first, int last) {
	if (orientation != Qt::Horizontal)