drumstick  2.0.0
pianokey.cpp
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1 /*
2  Virtual Piano Widget for Qt5
3  Copyright (C) 2008-2020, Pedro Lopez-Cabanillas <plcl@users.sf.net>
4 
5  This program is free software; you can redistribute it and/or modify
6  it under the terms of the GNU General Public License as published by
7  the Free Software Foundation; either version 3 of the License, or
8  (at your option) any later version.
9 
10  This program is distributed in the hope that it will be useful,
11  but WITHOUT ANY WARRANTY; without even the implied warranty of
12  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  GNU General Public License for more details.
14 
15  You should have received a copy of the GNU General Public License along
16  with this program; If not, see <http://www.gnu.org/licenses/>.
17 */
18 
19 #include "pianokey.h"
20 #include <QApplication>
21 #include <QPainter>
22 #include <QPalette>
23 #include <drumstick/pianopalette.h>
24 
30 namespace drumstick { namespace widgets {
31 
32 const PianoPalette PianoKey::keyPalette(PAL_KEYS);
33 
34 PianoKey::PianoKey(const QRectF &rect, const bool black, const int note)
35  : QGraphicsRectItem(rect),
36  m_pressed(false),
37  m_note(note),
38  m_black(black)
39 {
40  m_brush = keyPalette.getColor(black ? 1 : 0);
41  setAcceptedMouseButtons(Qt::NoButton);
42 }
43 
44 void PianoKey::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
45 {
46  static const QPen blackPen(Qt::black, 1);
47  static const QPen grayPen(QBrush(Qt::gray), 1, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin);
48  painter->setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
49 
50  if (m_pressed) {
51  if (m_selectedBrush.style() != Qt::NoBrush) {
52  painter->setBrush(m_selectedBrush);
53  } else {
54  painter->setBrush(QApplication::palette().highlight());
55  }
56  } else {
57  painter->setBrush(m_brush);
58  }
59  painter->setPen(blackPen);
60  painter->drawRoundedRect(rect(), 15, 15, Qt::RelativeSize);
61  if (m_black) {
62  painter->drawPixmap(rect(), getPixmap(), pixmapRect());
63  } else {
64  QPointF points[3] = {
65  QPointF(rect().left()+1.5, rect().bottom()-1),
66  QPointF(rect().right()-1, rect().bottom()-1),
67  QPointF(rect().right()-1, rect().top()+1),
68  };
69  painter->setPen(grayPen);
70  painter->drawPolyline(points, 3);
71  }
72 }
73 
74 void PianoKey::setPressed(bool p)
75 {
76  if (p != m_pressed) {
77  m_pressed = p;
78  update();
79  }
80 }
81 
82 QPixmap& PianoKey::getPixmap() const
83 {
84  static QPixmap pixmap(QStringLiteral(":/vpiano/blkey.png"));
85  return pixmap;
86 }
87 
88 QRectF PianoKey::pixmapRect() const
89 {
90  return getPixmap().rect();
91 }
92 
93 void PianoKey::resetBrush()
94 {
95  m_brush = keyPalette.getColor(m_black ? 1 : 0);
96 }
97 
98 } // namespace widgets
99 } // namespace drumstick
@ PAL_KEYS
Two background colors (naturals/alterations)
Definition: pianopalette.h:50
Drumstick common.
Definition: alsaclient.cpp:68
Declaration of the PianoKey class.
Piano Palette declarations.