[pulseview.git] / pv / view / ruler.hpp

/*
 * 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
 */

#ifndef PULSEVIEW_PV_VIEW_RULER_H
#define PULSEVIEW_PV_VIEW_RULER_H

#include <memory>

#include "marginwidget.hpp"

namespace pv {
namespace view {

class TimeItem;

class Ruler : public MarginWidget
{
	Q_OBJECT

private:

	/// Height of the ruler in multipes of the text height
	static const float RulerHeight;

	static const int MinorTickSubdivision;

	/// Height of the hover arrow in multiples of the text height
	static const float HoverArrowSize;

public:
	Ruler(View &parent);

public:
	void clear_selection();

public:
	QSize sizeHint() const;

	/**
	 * The extended area that the header widget would like to be sized to.
	 * @remarks This area is the area specified by sizeHint, extended by
	 * the area to overlap the viewport.
	 */
	QSize extended_size_hint() const;

private:
	void paintEvent(QPaintEvent *event);

	void mouseMoveEvent(QMouseEvent *e);
	void mousePressEvent(QMouseEvent *e);
	void mouseReleaseEvent(QMouseEvent *);
	void leaveEvent(QEvent*);

	void mouseDoubleClickEvent(QMouseEvent *e);

	void keyPressEvent(QKeyEvent *e);

private:
	/**
	 * Draw a hover arrow under the cursor position.
	 * @param p The painter to draw into.
	 * @param text_height The height of a single text ascent.
	 */
	void draw_hover_mark(QPainter &p, int text_height);

	int calculate_text_height() const;

private:
	std::shared_ptr<TimeItem> mouse_down_item_;

private Q_SLOTS:
	void hover_point_changed();
};

} // namespace view
} // namespace pv

#endif // PULSEVIEW_PV_VIEW_RULER_H
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	#ifndef PULSEVIEW_PV_VIEW_RULER_H
	22	#define PULSEVIEW_PV_VIEW_RULER_H
	23
	24	#include <memory>
	25
	26	#include "marginwidget.hpp"
	27
	28	namespace pv {
	29	namespace view {
	30
	31	class TimeItem;
	32
	33	class Ruler : public MarginWidget
	34	{
	35	Q_OBJECT
	36
	37	private:
	38
	39	/// Height of the ruler in multipes of the text height
	40	static const float RulerHeight;
	41
	42	static const int MinorTickSubdivision;
	43
	44	/// Height of the hover arrow in multiples of the text height
	45	static const float HoverArrowSize;
	46
	47	public:
	48	Ruler(View &parent);
	49
	50	public:
	51	void clear_selection();
	52
	53	public:
	54	QSize sizeHint() const;
	55
	56	/**
	57	* The extended area that the header widget would like to be sized to.
	58	* @remarks This area is the area specified by sizeHint, extended by
	59	* the area to overlap the viewport.
	60	*/
	61	QSize extended_size_hint() const;
	62
	63	private:
	64	void paintEvent(QPaintEvent *event);
	65
	66	void mouseMoveEvent(QMouseEvent *e);
	67	void mousePressEvent(QMouseEvent *e);
	68	void mouseReleaseEvent(QMouseEvent *);
	69	void leaveEvent(QEvent*);
	70
	71	void mouseDoubleClickEvent(QMouseEvent *e);
	72
	73	void keyPressEvent(QKeyEvent *e);
	74
	75	private:
	76	/**
	77	* Draw a hover arrow under the cursor position.
	78	* @param p The painter to draw into.
	79	* @param text_height The height of a single text ascent.
	80	*/
	81	void draw_hover_mark(QPainter &p, int text_height);
	82
	83	int calculate_text_height() const;
	84
	85	private:
	86	std::shared_ptr<TimeItem> mouse_down_item_;
	87
	88	private Q_SLOTS:
	89	void hover_point_changed();
	90	};
	91
	92	} // namespace view
	93	} // namespace pv
	94
	95	#endif // PULSEVIEW_PV_VIEW_RULER_H