summaryrefslogtreecommitdiff
path: root/src/canvastoolthreshold.cc
blob: a905766a060687994ca1625383f03d9720f993c9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            canvastoolthreshold.cc
 *
 *  Fri Jul 29 16:27:00 CEST 2011
 *  Copyright 2011 Bent Bisballe Nyeng
 *  deva@aasimon.org
 ****************************************************************************/

/*
 *  This file is part of DrumGizmo.
 *
 *  DrumGizmo 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.
 *
 *  DrumGizmo 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 DrumGizmo; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */
#include "canvastoolthreshold.h"

#include <math.h>

#include "project.h"

#define mapX(x) canvas->mapX(x)
#define mapY(x) canvas->mapY(x)
#define unmapX(x) canvas->unmapX(x)
#define unmapY(x) canvas->unmapY(x)

CanvasToolThreshold::CanvasToolThreshold(Canvas* c, Instrument& instrument)
	: instrument(instrument)
{
	canvas = c;
	threshold = instrument.getThreshold();

	threshold_is_moving = false;

	colThreshold = QColor(255, 127, 127);
	colThresholdMoving = QColor(180, 0, 0);
}

bool CanvasToolThreshold::mouseMoveEvent(QMouseEvent* event)
{
	if(!isActive())
	{
		return false;
	}

	if(event->button() != Qt::LeftButton)
	{
		if(abs(event->y() - mapY(threshold)) < 2 ||
		   abs(event->y() - mapY(-threshold)) < 2 )
		{

			canvas->setCursor(Qt::SplitVCursor);
			return true;
		}
	}

	if(threshold_is_moving)
	{
		float val = unmapY(event->y());
		if(fabs(val) > 1.0)
		{
			val = 1.0;
		}
		threshold = fabs(val);
		canvas->update();

		emit thresholdChanging(threshold);
		instrument.setThreshold(threshold);
		return true;
	}

	return false;
}

bool CanvasToolThreshold::mousePressEvent(QMouseEvent* event)
{
	if(!isActive())
	{
		return false;
	}

	if(event->button() == Qt::LeftButton)
	{
		// Check if threshold is being dragged.
		if(abs(event->y() - mapY(threshold)) < 2 ||
		   abs(event->y() - mapY(-threshold)) < 2)
		{
			threshold_is_moving = true;
			canvas->update();
			return true;
		}
	}

	return false;
}

bool CanvasToolThreshold::mouseReleaseEvent(QMouseEvent* event)
{
	if(!isActive())
	{
		return false;
	}

	if(event->button() == Qt::LeftButton)
	{
		if(threshold_is_moving)
		{
			threshold_is_moving = false;
			canvas->setCursor(Qt::ArrowCursor);
			canvas->update();

			emit thresholdChanged(threshold);
			instrument.setThreshold(threshold);
			return true;
		}
	}

	return false;
}

void CanvasToolThreshold::paintEvent(QPaintEvent* event, QPainter& painter)
{
	if(!isActive())
	{
		return;
	}

	if(threshold_is_moving)
	{
		painter.setPen(colThresholdMoving);
	}
	else
	{
		painter.setPen(colThreshold);
	}
	painter.drawLine(event->rect().x(), mapY(threshold),
	                 event->rect().x() + event->rect().width(), mapY(threshold));
	painter.drawLine(event->rect().x(), mapY(-threshold),
	                 event->rect().x() + event->rect().width(), mapY(-threshold));
}