Method positionXChanged

src/frontend/dockwidgets/CartesianPlotLegendDock.cpp:344–375

! called when legend's current horizontal position relative to its parent (left, center, right, relative) is changed. */

	called when legend's current horizontal position relative to its parent (left, center, right, relative) is changed.
*/
void CartesianPlotLegendDock::positionXChanged(int index) {
	CONDITIONAL_LOCK_RETURN;

	auto position = m_legend->position();
	auto oldHorizontalPosition = position.horizontalPosition;
	position.horizontalPosition = CartesianPlotLegend::HorizontalPosition(index);
	double x = 0.;
	if (position.horizontalPosition == WorksheetElement::HorizontalPosition::Relative) {
		switch (oldHorizontalPosition) {
		case WorksheetElement::HorizontalPosition::Left:
		case WorksheetElement::HorizontalPosition::Relative:
			break;
		case WorksheetElement::HorizontalPosition::Center:
			x = 0.5;
			break;
		case WorksheetElement::HorizontalPosition::Right:
			x = 1.0;
		}
		ui.sbPositionX->setSuffix(QStringLiteral(" %"));
	} else {
		if (m_units == Units::Metric)
			ui.sbPositionX->setSuffix(QStringLiteral(" cm"));
		else
			ui.sbPositionX->setSuffix(QStringLiteral(" in"));
	}

	position.point.setX(x);
	ui.sbPositionX->setValue(std::round(100. * x));

	for (auto* legend : m_legendList)
		legend->setPosition(position);
}

/*!
	called when legend's current vertical position relative to its parent (top, center, bottom, custom) is changed.