1 /**
2 * File name: MidiKeyWidget.cpp
3 * Project: Geonkick (A kick synthesizer)
4 *
5 * Copyright (C) 2020 Iurie Nistor (http://iuriepage.wordpress.com)
6 *
7 * This file is part of Geonkick.
8 *
9 * GeonKick is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 3 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24 #include "MidiKeyWidget.h"
25
26 #include <RkEvent.h>
27
MidiKeyWidget(GeonkickWidget * parent,PercussionModel * model,Rk::WindowFlags flag)28 MidiKeyWidget::MidiKeyWidget(GeonkickWidget *parent,
29 PercussionModel *model,
30 Rk::WindowFlags flag)
31 : GeonkickWidget(parent, flag)
32 , percussionModel{model}
33 , cellSize{32, 32}
34 , widgetPadding{8}
35 , midiRows{8}
36 , midiColumns{12}
37 {
38 setFixedSize(midiColumns * cellSize.width() + 2 * widgetPadding,
39 midiRows * cellSize.height() + 2 * widgetPadding);
40 setBackgroundColor({68, 68, 70, 240});
41
42 RkImage img(size());
43 RkPainter painter(&img);
44 auto font = painter.font();
45 font.setSize(10);
46 painter.setFont(font);
47 auto pen = painter.pen();
48 pen.setColor({10, 10, 10, 230});
49 pen.setWidth(1);
50 painter.setPen(pen);
51 RkRect borderRect = rect();
52 borderRect.setSize({borderRect.width() - 1, borderRect.height() - 1});
53 painter.drawRect(borderRect);
54 pen.setColor({40, 40, 40, 230});
55 pen.setWidth(1);
56 painter.setPen(pen);
57 GeonkickTypes::MidiKey key = 21;
58 for (int row = 0; row < midiRows && key <= 109; row++) {
59 for (int col = 0; col < midiColumns && key <= 109; col++)
60 drawCell(painter, key++, row, col);
61 }
62 setBackgroundImage(img);
63 selectedCell = getCell(percussionModel->key());
64 RK_ACT_BIND(percussionModel, keyUpdated,
65 RK_ACT_ARGS(PercussionModel::KeyIndex key),
66 this,
67 onUpdateKey(key));
68 }
69
drawCell(RkPainter & painter,GeonkickTypes::MidiKey key,int row,int col)70 void MidiKeyWidget::drawCell(RkPainter &painter,
71 GeonkickTypes::MidiKey key,
72 int row, int col)
73 {
74 RkRect cellRect({widgetPadding + col * cellSize.width(),
75 widgetPadding + row * cellSize.height()}, cellSize);
76 auto penBk = painter.pen();
77 painter.fillRect(cellRect, {60, 60, 60});
78 painter.setPen(penBk);
79 painter.drawRect(cellRect);
80 auto pen = penBk;
81 RkFont font;
82 if (col == 0 || row == 0) {
83 font = painter.font();
84 font.setWeight(RkFont::Weight::Bold);
85 pen.setColor({240, 240, 240});
86 } else {
87 pen.setColor({200, 200, 200});
88 font = painter.font();
89 font.setWeight(RkFont::Weight::Normal);
90 }
91 painter.setPen(pen);
92 painter.setFont(font);
93 painter.drawText(cellRect, midiKeyToNote(key));
94 painter.setPen(penBk);
95 }
96
paintWidget(RkPaintEvent * event)97 void MidiKeyWidget::paintWidget([[maybe_unused]] RkPaintEvent *event)
98 {
99 RkPainter painter(this);
100 if (hoverCell.isValid()) {
101 // Draw cell background.
102 RkColor bkColor(80, 80, 80);
103 RkRect innerRect({hoverCell.rect().left() + 1, hoverCell.rect().top() + 1},
104 RkSize(hoverCell.rect().width() - 1,
105 hoverCell.rect().height() - 1));
106 painter.fillRect(innerRect, bkColor);
107
108 // Draw cell text.
109 RkFont font = painter.font();
110 font.setSize(10);
111 if (hoverCell.column() == 0 || hoverCell.row() == 0)
112 font.setWeight(RkFont::Weight::Bold);
113 else
114 font.setWeight(RkFont::Weight::Normal);
115 auto pen = painter.pen();
116 pen.setColor({230, 230, 230});
117 painter.setPen(pen);
118 painter.setFont(font);
119 painter.drawText(hoverCell.rect(), midiKeyToNote(hoverCell.key()));
120 }
121
122 if (selectedCell.isValid()) {
123 // Draw cell background.
124 RkColor bkColor;
125 bkColor = RkColor(100, 100, 100);
126 RkRect innerRect({selectedCell.rect().left() + 1, selectedCell.rect().top() + 1},
127 RkSize(selectedCell.rect().width() - 1,
128 selectedCell.rect().height() - 1));
129 painter.fillRect(innerRect, bkColor);
130
131 // Draw cell text.
132 RkFont font = painter.font();
133 font.setSize(10);
134 if (selectedCell.column() == 0 || selectedCell.row() == 0)
135 font.setWeight(RkFont::Weight::Bold);
136 else
137 font.setWeight(RkFont::Weight::Normal);
138 auto pen = painter.pen();
139 pen.setColor({230, 230, 230});
140 painter.setPen(pen);
141 painter.setFont(font);
142 painter.drawText(selectedCell.rect(), midiKeyToNote(selectedCell.key()));
143 }
144 }
145
getCell(int x,int y) const146 KeyCell MidiKeyWidget::getCell(int x, int y) const
147 {
148 KeyCell cell;
149 int row = (y - widgetPadding) / cellSize.height();
150 if (row > midiRows - 1)
151 return KeyCell();
152 int col = (x - widgetPadding) / cellSize.width();
153 if (col > midiColumns - 1)
154 return KeyCell();
155 GeonkickTypes::MidiKey key = row * midiColumns + col + 21;
156 if (key < 21 || key > 109)
157 return KeyCell();
158 cell.setColumn(col);
159 cell.setRow(row);
160 cell.setKey(key);
161 cell.setRect(RkRect({widgetPadding + col * cellSize.width(),
162 widgetPadding + row * cellSize.height()},
163 RkSize(cellSize.width(), cellSize.height())));
164 return cell;
165 }
166
getCell(GeonkickTypes::MidiKey key) const167 KeyCell MidiKeyWidget::getCell(GeonkickTypes::MidiKey key) const
168 {
169 int row;
170 int col;
171 if (key < 21 || key > 108) {
172 // Any cell.
173 row = 7;
174 col = 4;
175 } else {
176 row = (key - 21) / midiColumns;
177 col = (key - 21) % 12;
178 }
179
180 KeyCell cell;
181 cell.setColumn(col);
182 cell.setRow(row);
183 cell.setKey(key);
184 cell.setRect(RkRect({widgetPadding + col * cellSize.width(),
185 widgetPadding + row * cellSize.height()},
186 RkSize(cellSize.width(), cellSize.height())));
187 return cell;
188 }
189
mouseButtonPressEvent(RkMouseEvent * event)190 void MidiKeyWidget::mouseButtonPressEvent(RkMouseEvent *event)
191 {
192 if (event->button() == RkMouseEvent::ButtonType::Left) {
193 if (auto cell = getCell(event->x(), event->y());
194 cell.isValid() && cell != selectedCell) {
195 selectedCell = cell;
196 percussionModel->setKey(selectedCell.key());
197 }
198 }
199 }
200
mouseButtonReleaseEvent(RkMouseEvent * event)201 void MidiKeyWidget::mouseButtonReleaseEvent(RkMouseEvent *event)
202 {
203 }
204
mouseMoveEvent(RkMouseEvent * event)205 void MidiKeyWidget::mouseMoveEvent(RkMouseEvent *event)
206 {
207 if (auto cell = getCell(event->x(), event->y()); cell != hoverCell) {
208 hoverCell = cell;
209 update();
210 }
211 }
212
midiKeyToNote(GeonkickTypes::MidiKey key)213 RkString MidiKeyWidget::midiKeyToNote(GeonkickTypes::MidiKey key)
214 {
215 if (key < 21 || key > 108)
216 return RkString("Any");
217
218 constexpr std::array<const char*, 17> notes =
219 {"C", "C#", "D",
220 "D#", "E", "F",
221 "F#", "G", "G#",
222 "A", "A#", "B"};
223 return RkString(notes[(key - 21 + 9) % 12]) + std::to_string((key - 20 + 9) / 12);
224 }
225
onUpdateKey(PercussionModel::KeyIndex key)226 void MidiKeyWidget::onUpdateKey(PercussionModel::KeyIndex key)
227 {
228 selectedCell = getCell(key);
229 update();
230 }
231
closeEvent(RkCloseEvent * event)232 void MidiKeyWidget::closeEvent(RkCloseEvent *event)
233 {
234 action isAboutToClose();
235 RkWidget::closeEvent(event);
236 }
237
hoverEvent(RkHoverEvent * event)238 void MidiKeyWidget::hoverEvent(RkHoverEvent *event)
239 {
240 if (!event->isHover()) {
241 hoverCell = KeyCell();
242 update();
243 }
244 }
245