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Code Issues Activity Actions

Piano: Fix insertion and deletion of notes

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On mouse move the pressed button is not present in the event argument
which causes the corresponding code to never fire. Instead it now stores
the original mouse down event and acts according to that on mouse move.
This commit is contained in:
Florian Kaiser 2023-02-06 20:46:41 +01:00 • committed by Jelle Raaijmakers
parent 4ab7216827
commit 815442b2b5
6 changed files with 71 additions and 46 deletions
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88
Userland/Applications/Piano/RollWidget.cpp
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@ -185,61 +185,63 @@ void RollWidget::mousedown_event(GUI::MouseEvent& event)
if (!widget_inner_rect().contains(event.x(), event.y()))
return;
m_note_drag_start = event.position();
if (event.button() == GUI::MouseButton::Secondary) {
auto const time = roll_length * (static_cast<double>(get_note_for_x(event.x())) / m_num_notes);
auto const note = m_track_manager.current_track()->note_at(time, get_pitch_for_y(event.y()));
int y = (m_note_drag_start.value().y() + vertical_scrollbar().value()) - frame_thickness();
y /= note_height;
m_drag_note = (note_count - 1) - y;
if (note.has_value()) {
m_track_manager.current_track()->remove_note(note.value());
update();
}
return;
}
m_mousedown_event = event;
}
void RollWidget::mouseup_event(GUI::MouseEvent& event)
{
mousemove_event(event);
m_mousedown_event = {};
}
u8 RollWidget::get_pitch_for_y(int y) const
{
return (note_count - 1) - ((y + vertical_scrollbar().value()) - frame_thickness()) / note_height;
}
int RollWidget::get_note_for_x(int x) const
{
// There's a case where we can't just use x / m_note_width. For example, if
// your m_note_width is 3.1 you will have a rect starting at 3. When that
// leftmost pixel of the rect is clicked you will do 3 / 3.1 which is 0
// and not 1. We can avoid that case by shifting x by 1 if m_note_width is
// fractional, being careful not to shift out of bounds.
x = (x + horizontal_scrollbar().value()) - frame_thickness();
bool const note_width_is_fractional = m_note_width - static_cast<int>(m_note_width) != 0;
bool const x_is_not_last = x != widget_inner_rect().width() - 1;
if (note_width_is_fractional && x_is_not_last)
++x;
x /= m_note_width;
return clamp(x, 0, m_num_notes - 1);
}
void RollWidget::mousemove_event(GUI::MouseEvent& event)
{
if (!m_note_drag_start.has_value())
if (!m_mousedown_event.has_value())
return;
if (m_note_drag_location.has_value()) {
// Clear previous note
m_track_manager.current_track()->remove_note(m_note_drag_location.value());
}
if (m_mousedown_event.value().button() == GUI::MouseButton::Primary) {
int const x_start = get_note_for_x(m_mousedown_event.value().x());
int const x_end = get_note_for_x(event.x());
// Right-Click deletes notes
if (event.button() == GUI::MouseButton::Secondary) {
const u32 on_sample = round(roll_length * (static_cast<double>(min(x_start, x_end)) / m_num_notes));
const u32 off_sample = round(roll_length * (static_cast<double>(max(x_start, x_end) + 1) / m_num_notes)) - 1;
auto const note = RollNote { on_sample, off_sample, get_pitch_for_y(m_mousedown_event.value().y()), 127 };
m_track_manager.current_track()->set_note(note);
update();
return;
}
auto get_note_x = [&](int x0) {
// There's a case where we can't just use x / m_note_width. For example, if
// your m_note_width is 3.1 you will have a rect starting at 3. When that
// leftmost pixel of the rect is clicked you will do 3 / 3.1 which is 0
// and not 1. We can avoid that case by shifting x by 1 if m_note_width is
// fractional, being careful not to shift out of bounds.
int x = (x0 + horizontal_scrollbar().value()) - frame_thickness();
bool note_width_is_fractional = m_note_width - static_cast<int>(m_note_width) != 0;
bool x_is_not_last = x != widget_inner_rect().width() - 1;
if (note_width_is_fractional && x_is_not_last)
++x;
x /= m_note_width;
return clamp(x, 0, m_num_notes - 1);
};
int x0 = get_note_x(m_note_drag_start.value().x());
int x1 = get_note_x(event.x());
u32 on_sample = roll_length * (static_cast<double>(min(x0, x1)) / m_num_notes);
u32 off_sample = (roll_length * (static_cast<double>(max(x0, x1) + 1) / m_num_notes)) - 1;
m_note_drag_location = RollNote { on_sample, off_sample, (u8)m_drag_note, 127 };
m_track_manager.current_track()->set_note(m_note_drag_location.value());
update();
}
void RollWidget::mouseup_event([[maybe_unused]] GUI::MouseEvent& event)
{
m_note_drag_start = {};
m_note_drag_location = {};
}
// FIXME: Implement zoom and horizontal scroll events in LibGUI, not here.