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Ladybird: Use pixelDelta() on supported platforms for better scrolling

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Bastiaan van der Plaat 2023-08-14 09:45:14 +02:00 committed by Andrew Kaster
parent 0facfd3257
commit abf0c8f1a6
Notes: sideshowbarker 2024-07-17 20:33:50 +09:00 
Author: https://github.com/bplaat
Commit: https://github.com/SerenityOS/serenity/commit/abf0c8f1a6
Pull-request: https://github.com/SerenityOS/serenity/pull/20460
Reviewed-by: https://github.com/MacDue
Reviewed-by: https://github.com/kalenikaliaksandr
1 changed files with 13 additions and 7 deletions
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20
Ladybird/Qt/WebContentView.cpp
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@ -282,13 +282,19 @@ void WebContentView::wheelEvent(QWheelEvent* event)
auto button = get_button_from_qt_event(*event);
auto buttons = get_buttons_from_qt_event(*event);
auto modifiers = get_modifiers_from_qt_mouse_event(*event);
auto num_degrees = -event->angleDelta();
float delta_x = -num_degrees.x() / 120;
float delta_y = num_degrees.y() / 120;
auto step_x = delta_x * QApplication::wheelScrollLines() * devicePixelRatio();
auto step_y = delta_y * QApplication::wheelScrollLines() * devicePixelRatio();
constexpr int scroll_step_size = 24;
client().async_mouse_wheel(to_content_position(position), button, buttons, modifiers, step_x * scroll_step_size, step_y * scroll_step_size);
auto num_pixels = -event->pixelDelta();
if (!num_pixels.isNull()) {
client().async_mouse_wheel(to_content_position(position), button, buttons, modifiers, num_pixels.x(), num_pixels.y());
} else {
auto num_degrees = -event->angleDelta();
float delta_x = -num_degrees.x() / 120;
float delta_y = num_degrees.y() / 120;
auto step_x = delta_x * QApplication::wheelScrollLines() * devicePixelRatio();
auto step_y = delta_y * QApplication::wheelScrollLines() * devicePixelRatio();
int scroll_step_size = verticalScrollBar()->singleStep();
client().async_mouse_wheel(to_content_position(position), button, buttons, modifiers, step_x * scroll_step_size, step_y * scroll_step_size);
}
event->accept();
return;
}