[pulseview.git] / pv / view / cursor.cpp

/*
 * This file is part of the PulseView project.
 *
 * Copyright (C) 2012 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, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */

#include "cursor.hpp"

#include "view.hpp"
#include "pv/util.hpp"

#include <QApplication>
#include <QBrush>
#include <QPainter>
#include <QPointF>
#include <QRect>
#include <QRectF>

#include <cassert>
#include <cstdio>
#include <limits>

using std::abs;
using std::shared_ptr;
using std::numeric_limits;

namespace pv {
namespace view {

const QColor Cursor::FillColour(52, 101, 164);

Cursor::Cursor(View &view, double time) :
	TimeMarker(view, FillColour, time)
{
}

bool Cursor::enabled() const
{
	return view_.cursors_shown();
}

QString Cursor::get_text() const
{
	return pv::util::format_time(time_, view_.tick_prefix(), 2);
}

QRectF Cursor::label_rect(const QRectF &rect) const
{
	const shared_ptr<Cursor> other(get_other_cursor());
	assert(other);

	const float x = (time_ - view_.offset()) / view_.scale();

	QFontMetrics m(QApplication::font());
	QSize text_size = m.boundingRect(get_text()).size();

	const QSizeF label_size(
		text_size.width() + LabelPadding.width() * 2,
		text_size.height() + LabelPadding.height() * 2);
	const float top = rect.height() - label_size.height() -
		TimeMarker::ArrowSize - 0.5f;
	const float height = label_size.height();

	const double other_time = other->time();
	if (time_ > other_time ||
		(abs(time_ - other_time) < numeric_limits<double>::epsilon() &&
		this > other.get()))
		return QRectF(x, top, label_size.width(), height);
	else
		return QRectF(x - label_size.width(), top,
			label_size.width(), height);
}

shared_ptr<Cursor> Cursor::get_other_cursor() const
{
	const shared_ptr<CursorPair> cursors(view_.cursors());
	assert(cursors);
	return (cursors->first().get() == this) ?
		cursors->second() : cursors->first();
}

} // namespace view
} // namespace pv
Commit	Line	Data
	1	/*
	2	* This file is part of the PulseView project.
	3	*
	4	* Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
	21	#include "cursor.hpp"
	22
	23	#include "view.hpp"
	24	#include "pv/util.hpp"
	25
	26	#include <QApplication>
	27	#include <QBrush>
	28	#include <QPainter>
	29	#include <QPointF>
	30	#include <QRect>
	31	#include <QRectF>
	32
	33	#include <cassert>
	34	#include <cstdio>
	35	#include <limits>
	36
	37	using std::abs;
	38	using std::shared_ptr;
	39	using std::numeric_limits;
	40
	41	namespace pv {
	42	namespace view {
	43
	44	const QColor Cursor::FillColour(52, 101, 164);
	45
	46	Cursor::Cursor(View &view, double time) :
	47	TimeMarker(view, FillColour, time)
	48	{
	49	}
	50
	51	bool Cursor::enabled() const
	52	{
	53	return view_.cursors_shown();
	54	}
	55
	56	QString Cursor::get_text() const
	57	{
	58	return pv::util::format_time(time_, view_.tick_prefix(), 2);
	59	}
	60
	61	QRectF Cursor::label_rect(const QRectF &rect) const
	62	{
	63	const shared_ptr<Cursor> other(get_other_cursor());
	64	assert(other);
	65
	66	const float x = (time_ - view_.offset()) / view_.scale();
	67
	68	QFontMetrics m(QApplication::font());
	69	QSize text_size = m.boundingRect(get_text()).size();
	70
	71	const QSizeF label_size(
	72	text_size.width() + LabelPadding.width() * 2,
	73	text_size.height() + LabelPadding.height() * 2);
	74	const float top = rect.height() - label_size.height() -
	75	TimeMarker::ArrowSize - 0.5f;
	76	const float height = label_size.height();
	77
	78	const double other_time = other->time();
	79	if (time_ > other_time \|\|
	80	(abs(time_ - other_time) < numeric_limits<double>::epsilon() &&
	81	this > other.get()))
	82	return QRectF(x, top, label_size.width(), height);
	83	else
	84	return QRectF(x - label_size.width(), top,
	85	label_size.width(), height);
	86	}
	87
	88	shared_ptr<Cursor> Cursor::get_other_cursor() const
	89	{
	90	const shared_ptr<CursorPair> cursors(view_.cursors());
	91	assert(cursors);
	92	return (cursors->first().get() == this) ?
	93	cursors->second() : cursors->first();
	94	}
	95
	96	} // namespace view
	97	} // namespace pv