diff options
Diffstat (limited to 'Userland/Applications/Piano/RollWidget.cpp')
| -rw-r--r-- | Userland/Applications/Piano/RollWidget.cpp | 84 |
1 files changed, 66 insertions, 18 deletions
diff --git a/Userland/Applications/Piano/RollWidget.cpp b/Userland/Applications/Piano/RollWidget.cpp index 2a247fc7e0..f4c5e36f8b 100644 --- a/Userland/Applications/Piano/RollWidget.cpp +++ b/Userland/Applications/Piano/RollWidget.cpp @@ -1,6 +1,7 @@ /* * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org> * Copyright (c) 2019-2020, William McPherson <willmcpherson2@gmail.com> + * Copyright (c) 2021, kleines Filmröllchen <malu.bertsch@gmail.com> * * SPDX-License-Identifier: BSD-2-Clause */ @@ -68,6 +69,62 @@ void RollWidget::paint_event(GUI::PaintEvent& event) int horizontal_notes_to_paint = horizontal_paint_area / m_note_width; GUI::Painter painter(*this); + + // Draw the background, if necessary. + if (viewport_changed() || paint_area != m_background->height()) { + m_background = Gfx::Bitmap::create(Gfx::BitmapFormat::BGRx8888, Gfx::IntSize(m_roll_width, paint_area)); + Gfx::Painter background_painter(*m_background); + + background_painter.translate(frame_thickness(), frame_thickness()); + background_painter.translate(-horizontal_note_offset_remainder, -note_offset_remainder); + + for (int y = 0; y < notes_to_paint; ++y) { + int y_pos = y * note_height; + + for (int x = 0; x < horizontal_notes_to_paint; ++x) { + // This is needed to avoid rounding errors. You can't just use + // m_note_width as the width. + int x_pos = x * m_note_width; + int next_x_pos = (x + 1) * m_note_width; + int distance_to_next_x = next_x_pos - x_pos; + Gfx::IntRect rect(x_pos, y_pos, distance_to_next_x, note_height); + + if (key_pattern[key_pattern_index] == Black) + background_painter.fill_rect(rect, Color::LightGray); + else + background_painter.fill_rect(rect, Color::White); + + background_painter.draw_line(rect.top_right(), rect.bottom_right(), Color::Black); + background_painter.draw_line(rect.bottom_left(), rect.bottom_right(), Color::Black); + } + + if (--key_pattern_index == -1) + key_pattern_index = notes_per_octave - 1; + } + + background_painter.translate(-x_offset, -y_offset); + background_painter.translate(horizontal_note_offset_remainder, note_offset_remainder); + + for (int note = note_count - (note_offset + notes_to_paint); note <= (note_count - 1) - note_offset; ++note) { + int y = ((note_count - 1) - note) * note_height; + + Gfx::IntRect note_name_rect(3, y, 1, note_height); + const char* note_name = note_names[note % notes_per_octave]; + + background_painter.draw_text(note_name_rect, note_name, Gfx::TextAlignment::CenterLeft); + note_name_rect.move_by(Gfx::FontDatabase::default_font().width(note_name) + 2, 0); + if (note % notes_per_octave == 0) + background_painter.draw_text(note_name_rect, String::formatted("{}", note / notes_per_octave + 1), Gfx::TextAlignment::CenterLeft); + } + + m_prev_zoom_level = m_zoom_level; + m_prev_scroll_x = horizontal_scrollbar().value(); + m_prev_scroll_y = vertical_scrollbar().value(); + } + + painter.blit(Gfx::IntPoint(0, 0), *m_background, m_background->rect()); + + // Draw the notes, mouse interaction, and time position. painter.translate(frame_thickness(), frame_thickness()); painter.add_clip_rect(event.rect()); painter.translate(-horizontal_note_offset_remainder, -note_offset_remainder); @@ -84,20 +141,9 @@ void RollWidget::paint_event(GUI::PaintEvent& event) int distance_to_next_x = next_x_pos - x_pos; Gfx::IntRect rect(x_pos, y_pos, distance_to_next_x, note_height); - if (key_pattern[key_pattern_index] == Black) - painter.fill_rect(rect, Color::LightGray); - else - painter.fill_rect(rect, Color::White); - if (keys_widget() && keys_widget()->note_is_set(note)) painter.fill_rect(rect, note_pressed_color.with_alpha(128)); - - painter.draw_line(rect.top_right(), rect.bottom_right(), Color::Black); - painter.draw_line(rect.bottom_left(), rect.bottom_right(), Color::Black); } - - if (--key_pattern_index == -1) - key_pattern_index = notes_per_octave - 1; } painter.translate(-x_offset, -y_offset); @@ -119,13 +165,6 @@ void RollWidget::paint_event(GUI::PaintEvent& event) painter.fill_rect(rect, note_pressed_color); painter.draw_rect(rect, Color::Black); } - Gfx::IntRect note_name_rect(3, y, 1, note_height); - const char* note_name = note_names[note % notes_per_octave]; - - painter.draw_text(note_name_rect, note_name, Gfx::TextAlignment::CenterLeft); - note_name_rect.move_by(Gfx::FontDatabase::default_font().width(note_name) + 2, 0); - if (note % notes_per_octave == 0) - painter.draw_text(note_name_rect, String::formatted("{}", note / notes_per_octave + 1), Gfx::TextAlignment::CenterLeft); } int x = m_roll_width * (static_cast<double>(m_track_manager.time()) / roll_length); @@ -135,6 +174,15 @@ void RollWidget::paint_event(GUI::PaintEvent& event) GUI::Frame::paint_event(event); } +bool RollWidget::viewport_changed() const +{ + // height is complicated to check, will be done in paint_event + return m_background.is_null() + || m_roll_width != m_background->width() + || m_prev_scroll_x != horizontal_scrollbar().value() || m_prev_scroll_y != vertical_scrollbar().value() + || m_prev_zoom_level != m_zoom_level; +} + void RollWidget::mousedown_event(GUI::MouseEvent& event) { if (!widget_inner_rect().contains(event.x(), event.y())) |