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LibGUI: Implement enter/leave events (with WindowServer support.)

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Windows now learn when the mouse cursor leaves or enters them.
Use this to implement GWidget::{enter,leave}_event() and use that
to implement the CoolBar button effect. :^)
This commit is contained in:
Andreas Kling 2019-02-20 10:12:19 +01:00
parent af7eb5c89c
commit bf30502560
14 changed files with 103 additions and 5 deletions
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20
LibGUI/GWindow.cpp
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@ -157,6 +157,7 @@ void GWindow::event(GEvent& event)
auto result = m_main_widget->hit_test(mouse_event.x(), mouse_event.y());
auto local_event = make<GMouseEvent>(event.type(), Point { result.localX, result.localY }, mouse_event.buttons(), mouse_event.button());
ASSERT(result.widget);
set_hovered_widget(result.widget);
return result.widget->event(*local_event);
}
return;
@ -203,6 +204,11 @@ void GWindow::event(GEvent& event)
return;
}
if (event.type() == GEvent::WindowLeft) {
set_hovered_widget(nullptr);
return;
}
GObject::event(event);
}
@ -301,3 +307,17 @@ void GWindow::set_opacity(float opacity)
m_opacity_when_windowless = opacity;
GEventLoop::main().post_message_to_server(request);
}
void GWindow::set_hovered_widget(GWidget* widget)
{
if (widget == m_hovered_widget.ptr())
return;
if (m_hovered_widget)
GEventLoop::main().post_event(m_hovered_widget.ptr(), make<GEvent>(GEvent::Leave));
m_hovered_widget = widget ? widget->make_weak_ptr() : nullptr;
if (m_hovered_widget)
GEventLoop::main().post_event(m_hovered_widget.ptr(), make<GEvent>(GEvent::Enter));
}