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Piano: Add sustain

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This commit is contained in:
William McPherson 2020-02-05 02:39:51 +11:00 • committed by Andreas Kling
parent 421a340572
commit 5990b3b2e6
5 changed files with 40 additions and 4 deletions
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13
Applications/Piano/KnobsWidget.cpp
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@ -51,6 +51,7 @@ KnobsWidget::KnobsWidget(GUI::Widget* parent, AudioEngine& audio_engine, MainWid
m_octave_label = GUI::Label::construct("Octave", m_labels_container);
m_wave_label = GUI::Label::construct("Wave", m_labels_container);
m_decay_label = GUI::Label::construct("Decay", m_labels_container);
m_sustain_label = GUI::Label::construct("Sustain", m_labels_container);
m_delay_label = GUI::Label::construct("Delay", m_labels_container);
m_values_container = GUI::Widget::construct(this);
@ -61,6 +62,7 @@ KnobsWidget::KnobsWidget(GUI::Widget* parent, AudioEngine& audio_engine, MainWid
m_octave_value = GUI::Label::construct(String::number(m_audio_engine.octave()), m_values_container);
m_wave_value = GUI::Label::construct(wave_strings[m_audio_engine.wave()], m_values_container);
m_decay_value = GUI::Label::construct(String::number(m_audio_engine.decay()), m_values_container);
m_sustain_value = GUI::Label::construct(String::number(m_audio_engine.sustain()), m_values_container);
m_delay_value = GUI::Label::construct(String::number(m_audio_engine.delay() / m_audio_engine.tick()), m_values_container);
m_knobs_container = GUI::Widget::construct(this);
@ -102,6 +104,17 @@ KnobsWidget::KnobsWidget(GUI::Widget* parent, AudioEngine& audio_engine, MainWid
m_decay_value->set_text(String::number(new_decay));
};
constexpr int max_sustain = 1000;
m_sustain_knob = GUI::Slider::construct(Orientation::Vertical, m_knobs_container);
m_sustain_knob->set_range(0, max_sustain);
m_sustain_knob->set_value(max_sustain - m_audio_engine.sustain());
m_sustain_knob->on_value_changed = [this](int value) {
int new_sustain = max_sustain - value;
m_audio_engine.set_sustain(new_sustain);
ASSERT(new_sustain == m_audio_engine.sustain());
m_sustain_value->set_text(String::number(new_sustain));
};
constexpr int max_delay = 8;
m_delay_knob = GUI::Slider::construct(Orientation::Vertical, m_knobs_container);
m_delay_knob->set_range(0, max_delay);