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LibGUI: Make event receivers be weak pointers.

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This commit is contained in:
Andreas Kling 2019-02-26 00:51:49 +01:00
parent 9624b54703
commit 95cfa49f1b
Notes: sideshowbarker 2024-07-19 15:37:51 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/95cfa49f1b3
4 changed files with 23 additions and 24 deletions
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30
LibGUI/GEventLoop.cpp
View file

@ -85,7 +85,7 @@ int GEventLoop::exec()
}
Vector<QueuedEvent> events = move(m_queued_events);
for (auto& queued_event : events) {
auto* receiver = queued_event.receiver;
auto* receiver = queued_event.receiver.ptr();
auto& event = *queued_event.event;
#ifdef GEVENTLOOP_DEBUG
dbgprintf("GEventLoop: %s{%p} event %u\n", receiver->class_name(), receiver, (unsigned)event.type());
@ -96,9 +96,7 @@ int GEventLoop::exec()
ASSERT_NOT_REACHED();
return 0;
default:
dbgprintf("event type %u with no receiver :(\n", event.type());
ASSERT_NOT_REACHED();
return 1;
dbgprintf("Event type %u with no receiver :(\n", event.type());
}
} else {
receiver->event(event);
@ -108,12 +106,12 @@ int GEventLoop::exec()
ASSERT_NOT_REACHED();
}
void GEventLoop::post_event(GObject* receiver, OwnPtr<GEvent>&& event)
void GEventLoop::post_event(GObject& receiver, OwnPtr<GEvent>&& event)
{
#ifdef GEVENTLOOP_DEBUG
dbgprintf("GEventLoop::post_event: {%u} << receiver=%p, event=%p\n", m_queued_events.size(), receiver, event.ptr());
dbgprintf("GEventLoop::post_event: {%u} << receiver=%p, event=%p\n", m_queued_events.size(), &receiver, event.ptr());
#endif
m_queued_events.append({ receiver, move(event) });
m_queued_events.append({ receiver.make_weak_ptr(), move(event) });
}
void GEventLoop::handle_paint_event(const WSAPI_ServerMessage& event, GWindow& window)
@ -121,12 +119,12 @@ void GEventLoop::handle_paint_event(const WSAPI_ServerMessage& event, GWindow& w
#ifdef GEVENTLOOP_DEBUG
dbgprintf("WID=%x Paint [%d,%d %dx%d]\n", event.window_id, event.paint.rect.location.x, event.paint.rect.location.y, event.paint.rect.size.width, event.paint.rect.size.height);
#endif
post_event(&window, make<GPaintEvent>(event.paint.rect));
post_event(window, make<GPaintEvent>(event.paint.rect));
}
void GEventLoop::handle_resize_event(const WSAPI_ServerMessage& event, GWindow& window)
{
post_event(&window, make<GResizeEvent>(event.window.old_rect.size, event.window.rect.size));
post_event(window, make<GResizeEvent>(event.window.old_rect.size, event.window.rect.size));
}
void GEventLoop::handle_window_activation_event(const WSAPI_ServerMessage& event, GWindow& window)
@ -134,17 +132,17 @@ void GEventLoop::handle_window_activation_event(const WSAPI_ServerMessage& event
#ifdef GEVENTLOOP_DEBUG
dbgprintf("WID=%x WindowActivation\n", event.window_id);
#endif
post_event(&window, make<GEvent>(event.type == WSAPI_ServerMessage::Type::WindowActivated ? GEvent::WindowBecameActive : GEvent::WindowBecameInactive));
post_event(window, make<GEvent>(event.type == WSAPI_ServerMessage::Type::WindowActivated ? GEvent::WindowBecameActive : GEvent::WindowBecameInactive));
}
void GEventLoop::handle_window_close_request_event(const WSAPI_ServerMessage&, GWindow& window)
{
post_event(&window, make<GEvent>(GEvent::WindowCloseRequest));
post_event(window, make<GEvent>(GEvent::WindowCloseRequest));
}
void GEventLoop::handle_window_entered_or_left_event(const WSAPI_ServerMessage& message, GWindow& window)
{
post_event(&window, make<GEvent>(message.type == WSAPI_ServerMessage::Type::WindowEntered ? GEvent::WindowEntered : GEvent::WindowLeft));
post_event(window, make<GEvent>(message.type == WSAPI_ServerMessage::Type::WindowEntered ? GEvent::WindowEntered : GEvent::WindowLeft));
}
void GEventLoop::handle_key_event(const WSAPI_ServerMessage& event, GWindow& window)
@ -158,7 +156,7 @@ void GEventLoop::handle_key_event(const WSAPI_ServerMessage& event, GWindow& win
key_event->m_shift = event.key.shift;
if (event.key.character != '\0')
key_event->m_text = String(&event.key.character, 1);
post_event(&window, move(key_event));
post_event(window, move(key_event));
}
void GEventLoop::handle_mouse_event(const WSAPI_ServerMessage& event, GWindow& window)
@ -181,7 +179,7 @@ void GEventLoop::handle_mouse_event(const WSAPI_ServerMessage& event, GWindow& w
case WSAPI_MouseButton::Middle: button = GMouseButton::Middle; break;
default: ASSERT_NOT_REACHED(); break;
}
post_event(&window, make<GMouseEvent>(type, event.mouse.position, event.mouse.buttons, button));
post_event(window, make<GMouseEvent>(type, event.mouse.position, event.mouse.buttons, button));
}
void GEventLoop::handle_menu_event(const WSAPI_ServerMessage& event)
@ -239,7 +237,7 @@ void GEventLoop::wait_for_event()
#ifdef GEVENTLOOP_DEBUG
dbgprintf("GEventLoop: Timer %d has expired, sending GTimerEvent to %p\n", timer.timer_id, timer.owner);
#endif
post_event(timer.owner, make<GTimerEvent>(timer.timer_id));
post_event(*timer.owner, make<GTimerEvent>(timer.timer_id));
if (timer.should_reload) {
timer.reload();
} else {
@ -378,7 +376,7 @@ int GEventLoop::register_timer(GObject& object, int milliseconds, bool should_re
{
ASSERT(milliseconds >= 0);
auto timer = make<EventLoopTimer>();
timer->owner = &object;
timer->owner = object.make_weak_ptr();
timer->interval = milliseconds;
timer->reload();
timer->should_reload = should_reload;

7
LibGUI/GEventLoop.h
View file

@ -5,6 +5,7 @@
#include <AK/HashMap.h>
#include <AK/OwnPtr.h>
#include <AK/Vector.h>
#include <AK/WeakPtr.h>
#include <WindowServer/WSAPITypes.h>
class GObject;
@ -18,7 +19,7 @@ public:
int exec();
void post_event(GObject* receiver, OwnPtr<GEvent>&&);
void post_event(GObject& receiver, OwnPtr<GEvent>&&);
static GEventLoop& main();
@ -56,7 +57,7 @@ private:
void get_next_timer_expiration(timeval&);
struct QueuedEvent {
GObject* receiver { nullptr };
WeakPtr<GObject> receiver;
OwnPtr<GEvent> event;
};
Vector<QueuedEvent> m_queued_events;
@ -75,7 +76,7 @@ private:
int interval { 0 };
timeval fire_time;
bool should_reload { false };
GObject* owner { nullptr };
WeakPtr<GObject> owner;
void reload();
bool has_expired() const;

2
LibGUI/GObject.cpp
View file

@ -76,6 +76,6 @@ void GObject::stop_timer()
void GObject::delete_later()
{
GEventLoop::main().post_event(this, make<GEvent>(GEvent::DeferredDestroy));
GEventLoop::main().post_event(*this, make<GEvent>(GEvent::DeferredDestroy));
}

8
LibGUI/GWindow.cpp
View file

@ -294,12 +294,12 @@ void GWindow::set_focused_widget(GWidget* widget)
if (m_focused_widget == widget)
return;
if (m_focused_widget) {
GEventLoop::main().post_event(m_focused_widget, make<GEvent>(GEvent::FocusOut));
GEventLoop::main().post_event(*m_focused_widget, make<GEvent>(GEvent::FocusOut));
m_focused_widget->update();
}
m_focused_widget = widget;
if (m_focused_widget) {
GEventLoop::main().post_event(m_focused_widget, make<GEvent>(GEvent::FocusIn));
GEventLoop::main().post_event(*m_focused_widget, make<GEvent>(GEvent::FocusIn));
m_focused_widget->update();
}
}
@ -345,10 +345,10 @@ void GWindow::set_hovered_widget(GWidget* widget)
return;
if (m_hovered_widget)
GEventLoop::main().post_event(m_hovered_widget.ptr(), make<GEvent>(GEvent::Leave));
GEventLoop::main().post_event(*m_hovered_widget, 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));
GEventLoop::main().post_event(*m_hovered_widget, make<GEvent>(GEvent::Enter));
}