drumstick  2.9.0
C++ MIDI libraries using Qt objects, idioms, and style.
pianokey.cpp
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1 /*
2  Virtual Piano Widget for Qt
3  Copyright (C) 2008-2023, 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 <QApplication>
20 #include <QPainter>
21 #include <QPalette>
22 #include <drumstick/pianopalette.h>
23 
24 #include "pianokey.h"
25 
31 namespace drumstick { namespace widgets {
32 
33 const PianoPalette PianoKey::keyPalette(PAL_KEYS);
34 
35 PianoKey::PianoKey(const QRectF &rect, const bool black, const int note)
36  : QGraphicsRectItem(rect),
37  m_pressed(false),
38  m_note(note),
39  m_black(black),
40  m_usePixmap(true)
41 {
42  m_brush = keyPalette.getColor(black ? 1 : 0);
43  setAcceptedMouseButtons(Qt::NoButton);
44  setFlag(QGraphicsItem::ItemClipsChildrenToShape);
45 }
46 
47 void PianoKey::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
48 {
49  static const QPen blackPen(Qt::black, 1);
50  painter->setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
51  if (m_pressed) {
52  if (m_selectedBrush.style() != Qt::NoBrush) {
53  painter->setBrush(m_selectedBrush);
54  } else {
55  painter->setBrush(QApplication::palette().highlight());
56  }
57  } else {
58  painter->setBrush(m_brush);
59  }
60  painter->setPen(blackPen);
61  painter->drawRoundedRect(rect(), 20, 15, Qt::RelativeSize);
62  if (m_usePixmap) {
63  QPixmap p = getPixmap();
64  painter->drawPixmap(rect(), p, p.rect());
65  }
66 }
67 
68 void PianoKey::setPressed(bool p)
69 {
70  if (p != m_pressed) {
71  m_pressed = p;
72  update();
73  }
74 }
75 
76 const QPixmap& PianoKey::getPixmap() const
77 {
78  static QPixmap blpixmap(QStringLiteral(":/vpiano/blkey.png"));
79  static QPixmap whpixmap(QStringLiteral(":/vpiano/whkey.png"));
80  static QColor bgColor;
81  if (!m_black && (bgColor != m_brush.color())) {
82  bgColor = m_brush.color();
83  paintPixmap(whpixmap, QColor::fromRgba(bgColor.rgba()^0xffffff));
84  }
85  if (m_pixmap.isNull()) {
86  return m_black ? blpixmap : whpixmap;
87  } else {
88  return m_pixmap;
89  }
90 }
91 
92 QRectF PianoKey::pixmapRect() const
93 {
94  return getPixmap().rect();
95 }
96 
97 void PianoKey::resetBrush()
98 {
99  m_brush = keyPalette.getColor(m_black ? 1 : 0);
100 }
101 
102 void PianoKey::setPixmap(const QPixmap &p)
103 {
104  m_pixmap = p;
105 }
106 
107 bool PianoKey::getUsePixmap() const
108 {
109  return m_usePixmap;
110 }
111 
112 void PianoKey::setUsePixmap(bool usePixmap)
113 {
114  m_usePixmap = usePixmap;
115 }
116 
117 void PianoKey::paintPixmap(QPixmap &pixmap, const QColor& color) const
118 {
119  if (!pixmap.isNull()) {
120  QPainter painter(&pixmap);
121  painter.setRenderHints(QPainter::SmoothPixmapTransform | QPainter::Antialiasing);
122  painter.setCompositionMode(QPainter::CompositionMode_SourceIn);
123  painter.fillRect(pixmap.rect(), color);
124  }
125 }
126 
127 } // namespace widgets
128 } // namespace drumstick
@ PAL_KEYS
Two background colors (naturals/alterations)
Definition: pianopalette.h:60
Drumstick common.
Definition: alsaclient.cpp:68
Declaration of the PianoKey class.
Piano Palette declarations.