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Code Issues Activity Actions

WindowServer+LibGUI: Handle mouse wheel deltas in the mouse event stream.

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The wheel events will end up in GWidget::mousewheel_event(GMouseEvent&)
on the client-side. This patch also implements basic wheel scrolling in
GScrollableWidget via this mechanism. :^)
This commit is contained in:
Andreas Kling 2019-05-13 19:52:57 +02:00
parent dae8eb6454
commit dab9901235
13 changed files with 58 additions and 25 deletions
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24
LibGUI/GWindow.cpp
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@ -170,19 +170,19 @@ void GWindow::set_override_cursor(GStandardCursor cursor)
void GWindow::event(CEvent& event)
{
if (event.type() == GEvent::MouseUp || event.type() == GEvent::MouseDown || event.type() == GEvent::MouseMove) {
if (event.type() == GEvent::MouseUp || event.type() == GEvent::MouseDown || event.type() == GEvent::MouseMove || event.type() == GEvent::MouseWheel) {
auto& mouse_event = static_cast<GMouseEvent&>(event);
if (m_global_cursor_tracking_widget) {
auto window_relative_rect = m_global_cursor_tracking_widget->window_relative_rect();
Point local_point { mouse_event.x() - window_relative_rect.x(), mouse_event.y() - window_relative_rect.y() };
auto local_event = make<GMouseEvent>((GEvent::Type)event.type(), local_point, mouse_event.buttons(), mouse_event.button(), mouse_event.modifiers());
auto local_event = make<GMouseEvent>((GEvent::Type)event.type(), local_point, mouse_event.buttons(), mouse_event.button(), mouse_event.modifiers(), mouse_event.wheel_delta());
m_global_cursor_tracking_widget->event(*local_event);
return;
}
if (m_automatic_cursor_tracking_widget) {
auto window_relative_rect = m_automatic_cursor_tracking_widget->window_relative_rect();
Point local_point { mouse_event.x() - window_relative_rect.x(), mouse_event.y() - window_relative_rect.y() };
auto local_event = make<GMouseEvent>((GEvent::Type)event.type(), local_point, mouse_event.buttons(), mouse_event.button(), mouse_event.modifiers());
auto local_event = make<GMouseEvent>((GEvent::Type)event.type(), local_point, mouse_event.buttons(), mouse_event.button(), mouse_event.modifiers(), mouse_event.wheel_delta());
m_automatic_cursor_tracking_widget->event(*local_event);
if (mouse_event.buttons() == 0)
m_automatic_cursor_tracking_widget = nullptr;
@ -190,16 +190,14 @@ void GWindow::event(CEvent& event)
}
if (!m_main_widget)
return;
if (m_main_widget) {
auto result = m_main_widget->hit_test(mouse_event.position());
auto local_event = make<GMouseEvent>((GEvent::Type)event.type(), result.local_position, mouse_event.buttons(), mouse_event.button(), mouse_event.modifiers());
ASSERT(result.widget);
set_hovered_widget(result.widget);
if (mouse_event.buttons() != 0 && !m_automatic_cursor_tracking_widget)
m_automatic_cursor_tracking_widget = result.widget->make_weak_ptr();
if (result.widget != m_global_cursor_tracking_widget.ptr())
return result.widget->event(*local_event);
}
auto result = m_main_widget->hit_test(mouse_event.position());
auto local_event = make<GMouseEvent>((GEvent::Type)event.type(), result.local_position, mouse_event.buttons(), mouse_event.button(), mouse_event.modifiers(), mouse_event.wheel_delta());
ASSERT(result.widget);
set_hovered_widget(result.widget);
if (mouse_event.buttons() != 0 && !m_automatic_cursor_tracking_widget)
m_automatic_cursor_tracking_widget = result.widget->make_weak_ptr();
if (result.widget != m_global_cursor_tracking_widget.ptr())
return result.widget->event(*local_event);
return;
}