Session: Fix issue #67 by improving error handling

[pulseview.git] / pv / views / trace / triggermarker.cpp

/*
 * This file is part of the PulseView project.
 *
 * Copyright (C) 2014 Joel Holdsworth <joel@airwebreathe.org.uk>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#include "triggermarker.hpp"
#include "view.hpp"

namespace pv {
namespace views {
namespace trace {

const QColor TriggerMarker::Color(0x00, 0x00, 0xB0);

TriggerMarker::TriggerMarker(View &view, const pv::util::Timestamp& time) :
	TimeItem(view),
	time_(time)
{
}

TriggerMarker::TriggerMarker(const TriggerMarker &marker) :
	TimeItem(marker.view_),
	time_(marker.time_)
{
}

bool TriggerMarker::enabled() const
{
	return true;
}

bool TriggerMarker::is_draggable(QPoint pos) const
{
	(void)pos;
	return false;
}

void TriggerMarker::set_time(const pv::util::Timestamp& time)
{
	time_ = time;

	view_.time_item_appearance_changed(true, true);
}

const pv::util::Timestamp TriggerMarker::time() const
{
	return time_;
}

float TriggerMarker::get_x() const
{
	return ((time_ - view_.offset()) / view_.scale()).convert_to<float>();
}

QPoint TriggerMarker::drag_point(const QRect &rect) const
{
	(void)rect;

	// The trigger marker cannot be moved, so there is no drag point
	return QPoint(INT_MIN, INT_MIN);
}

void TriggerMarker::paint_fore(QPainter &p, ViewItemPaintParams &pp)
{
	if (!enabled())
		return;

	QPen pen(Color);
	pen.setStyle(Qt::DashLine);

	const float x = get_x();
	p.setPen(pen);
	p.drawLine(QPointF(x, pp.top()), QPointF(x, pp.bottom()));
}

} // namespace trace
} // namespace views
} // namespace pv