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manager.cpp
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// Aseprite UI Library
// Copyright (C) 2018-2020 Igara Studio S.A.
// Copyright (C) 2001-2018 David Capello
//
// This file is released under the terms of the MIT license.
// Read LICENSE.txt for more information.
// #define REPORT_EVENTS
// #define REPORT_FOCUS_MOVEMENT
// #define DEBUG_PAINT_EVENTS
// #define LIMIT_DISPATCH_TIME
// #define DEBUG_UI_THREADS
#define GARBAGE_TRACE(...)
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ui/manager.h"
#include "base/clamp.h"
#include "base/concurrent_queue.h"
#include "base/scoped_value.h"
#include "base/time.h"
#include "os/display.h"
#include "os/event.h"
#include "os/event_queue.h"
#include "os/surface.h"
#include "os/system.h"
#include "ui/intern.h"
#include "ui/ui.h"
#if defined(DEBUG_PAINT_EVENTS) || defined(DEBUG_UI_THREADS)
#include "base/thread.h"
#endif
#ifdef REPORT_EVENTS
#include <iostream>
#endif
#include <algorithm>
#include <limits>
#include <list>
#include <memory>
#include <utility>
#include <vector>
namespace ui {
namespace {
// The redraw state is used to avoid drawing the manager when a window
// has been just closed by the user, so we delay the redrawing (the
// kPaintMessages generation) for the next generateMessages() round.
enum class RedrawState {
Normal,
AWindowHasJustBeenClosed,
RedrawDelayed,
};
RedrawState redrawState = RedrawState::Normal;
} // anonymous namespace
static const int NFILTERS = (int)(kFirstRegisteredMessage+1);
struct Filter {
int message;
Widget* widget;
Filter(int message, Widget* widget)
: message(message)
, widget(widget) { }
};
typedef std::list<Message*> Messages;
typedef std::list<Filter*> Filters;
Manager* Manager::m_defaultManager = nullptr;
gfx::Region Manager::m_dirtyRegion;
#ifdef DEBUG_UI_THREADS
static base::thread::native_id_type manager_thread = 0;
#endif
static WidgetsList mouse_widgets_list; // List of widgets to send mouse events
static Messages msg_queue; // Messages queue
static Messages used_msg_queue; // Messages queue
static base::concurrent_queue<Message*> concurrent_msg_queue;
static Filters msg_filters[NFILTERS]; // Filters for every enqueued message
static int filter_locks = 0;
static Widget* focus_widget; // The widget with the focus
static Widget* mouse_widget; // The widget with the mouse
static Widget* capture_widget; // The widget that captures the mouse
static bool first_time = true; // true when we don't enter in poll yet
// Don't adjust window positions automatically when it's false. Used
// when Screen/UI scaling is changed to avoid adjusting windows as
// when the os::Display is resized by the user.
static bool auto_window_adjustment = true;
// Keyboard focus movement stuff
inline bool does_accept_focus(Widget* widget)
{
return ((((widget)->flags() & (FOCUS_STOP |
DISABLED |
HIDDEN |
DECORATIVE)) == FOCUS_STOP) &&
((widget)->isVisible()));
}
static int count_widgets_accept_focus(Widget* widget);
static bool child_accept_focus(Widget* widget, bool first);
static Widget* next_widget(Widget* widget);
static int cmp_left(Widget* widget, int x, int y);
static int cmp_right(Widget* widget, int x, int y);
static int cmp_up(Widget* widget, int x, int y);
static int cmp_down(Widget* widget, int x, int y);
namespace {
class LockFilters {
public:
LockFilters() {
++filter_locks;
}
~LockFilters() {
ASSERT(filter_locks > 0);
--filter_locks;
if (filter_locks == 0) {
// Clear empty filters
for (Filters& msg_filter : msg_filters) {
for (auto it = msg_filter.begin(); it != msg_filter.end(); ) {
Filter* filter = *it;
if (filter->widget == nullptr) {
delete filter;
it = msg_filter.erase(it);
}
else {
++it;
}
}
}
}
}
};
} // anonymous namespace
// static
bool Manager::widgetAssociatedToManager(Widget* widget)
{
return (focus_widget == widget ||
mouse_widget == widget ||
capture_widget == widget ||
std::find(mouse_widgets_list.begin(),
mouse_widgets_list.end(),
widget) != mouse_widgets_list.end());
}
Manager::Manager()
: Widget(kManagerWidget)
, m_display(nullptr)
, m_eventQueue(nullptr)
, m_lockedWindow(nullptr)
, m_mouseButton(kButtonNone)
{
#ifdef DEBUG_UI_THREADS
ASSERT(!manager_thread);
manager_thread = base::this_thread::native_id();
#endif
if (!m_defaultManager) {
// Empty lists
ASSERT(msg_queue.empty());
mouse_widgets_list.clear();
// Reset variables
focus_widget = nullptr;
mouse_widget = nullptr;
capture_widget = nullptr;
}
setBounds(gfx::Rect(0, 0, ui::display_w(), ui::display_h()));
setVisible(true);
m_dirtyRegion = bounds();
// Default manager is the first one (and is always visible).
if (!m_defaultManager)
m_defaultManager = this;
}
Manager::~Manager()
{
#ifdef DEBUG_UI_THREADS
ASSERT(manager_thread == base::this_thread::native_id());
#endif
// There are some messages in queue? Dispatch everything.
dispatchMessages();
collectGarbage();
// Finish the main manager.
if (m_defaultManager == this) {
// No more cursor
set_mouse_cursor(kNoCursor);
// Destroy timers
ASSERT(!Timer::haveTimers());
// Destroy filters
#ifdef _DEBUG
for (Filters& msg_filter : msg_filters)
ASSERT(msg_filter.empty());
#endif
// No more default manager
m_defaultManager = nullptr;
// Shutdown system
ASSERT(msg_queue.empty());
mouse_widgets_list.clear();
}
}
void Manager::setDisplay(os::Display* display)
{
base::ScopedValue<bool> lock(
auto_window_adjustment, false,
auto_window_adjustment);
m_display = display;
m_eventQueue = os::instance()->eventQueue();
onNewDisplayConfiguration();
}
void Manager::run()
{
MessageLoop loop(this);
if (first_time) {
first_time = false;
Manager::getDefault()->invalidate();
set_mouse_cursor(kArrowCursor);
}
while (!children().empty())
loop.pumpMessages();
}
void Manager::flipDisplay()
{
if (!m_display)
return;
OverlayManager* overlays = OverlayManager::instance();
update_cursor_overlay();
// Draw overlays.
overlays->drawOverlays();
// Invalidate the dirty region in the laf::os::Display (the real OS window).
m_dirtyRegion.createIntersection(
m_dirtyRegion,
gfx::Region(gfx::Rect(0, 0, ui::display_w(), ui::display_h())));
if (!m_dirtyRegion.isEmpty()) {
m_display->invalidateRegion(m_dirtyRegion);
m_dirtyRegion.clear();
}
}
bool Manager::generateMessages()
{
#ifdef DEBUG_UI_THREADS
ASSERT(manager_thread == base::this_thread::native_id());
#endif
// First check: there are windows to manage?
if (children().empty())
return false;
// Generate messages from other threads
if (!concurrent_msg_queue.empty()) {
Message* msg = nullptr;
while (concurrent_msg_queue.try_pop(msg))
msg_queue.push_back(msg);
}
// Generate messages from OS input
generateMessagesFromOSEvents();
// Generate messages for timers
Timer::pollTimers();
// Returns true if we have to dispatch messages (if the redraw was
// delayed, we have to pump messages because there is where paint
// messages are flushed)
if (!msg_queue.empty() || redrawState != RedrawState::Normal)
return true;
else
return false;
}
void Manager::generateSetCursorMessage(const gfx::Point& mousePos,
KeyModifiers modifiers,
PointerType pointerType)
{
if (get_mouse_cursor() == kOutsideDisplay)
return;
Widget* dst = (capture_widget ? capture_widget: mouse_widget);
if (dst)
enqueueMessage(
newMouseMessage(
kSetCursorMessage, dst,
mousePos,
pointerType,
m_mouseButton,
modifiers));
else
set_mouse_cursor(kArrowCursor);
}
static MouseButton mouse_button_from_os_to_ui(const os::Event& osEvent)
{
static_assert((int)os::Event::NoneButton == (int)ui::kButtonNone &&
(int)os::Event::LeftButton == (int)ui::kButtonLeft &&
(int)os::Event::RightButton == (int)ui::kButtonRight &&
(int)os::Event::MiddleButton == (int)ui::kButtonMiddle &&
(int)os::Event::X1Button == (int)ui::kButtonX1 &&
(int)os::Event::X2Button == (int)ui::kButtonX2,
"Mouse button constants do not match");
return (MouseButton)osEvent.button();
}
void Manager::generateMessagesFromOSEvents()
{
#ifdef DEBUG_UI_THREADS
ASSERT(manager_thread == base::this_thread::native_id());
#endif
os::Event lastMouseMoveEvent;
// Events from laf-os
os::Event osEvent;
for (;;) {
// TODO Add timers to laf::os library so we can wait for then in
// the OS message loop.
bool canWait = (msg_queue.empty() &&
redrawState == RedrawState::Normal &&
!Timer::haveRunningTimers());
if (canWait && used_msg_queue.empty())
collectGarbage();
#if _DEBUG
else if (!m_garbage.empty()) {
GARBAGE_TRACE("collectGarbage() wasn't called #objects=%d"
" (msg_queue=%d used_msg_queue=%d redrawState=%d runningTimers=%d)\n",
int(m_garbage.size()),
msg_queue.size(),
used_msg_queue.size(),
int(redrawState),
Timer::haveRunningTimers());
}
#endif
m_eventQueue->getEvent(osEvent, canWait);
if (osEvent.type() == os::Event::None)
break;
switch (osEvent.type()) {
case os::Event::CloseDisplay: {
Message* msg = new Message(kCloseDisplayMessage);
msg->setRecipient(this);
msg->setPropagateToChildren(true);
enqueueMessage(msg);
break;
}
case os::Event::ResizeDisplay: {
Message* msg = new Message(kResizeDisplayMessage);
msg->setRecipient(this);
msg->setPropagateToChildren(true);
enqueueMessage(msg);
break;
}
case os::Event::DropFiles: {
Message* msg = new DropFilesMessage(osEvent.files());
msg->setRecipient(this);
enqueueMessage(msg);
break;
}
case os::Event::KeyDown:
case os::Event::KeyUp: {
Message* msg = new KeyMessage(
(osEvent.type() == os::Event::KeyDown ?
kKeyDownMessage:
kKeyUpMessage),
osEvent.scancode(),
osEvent.modifiers(),
osEvent.unicodeChar(),
osEvent.repeat());
if (osEvent.isDeadKey())
static_cast<KeyMessage*>(msg)->setDeadKey(true);
broadcastKeyMsg(msg);
enqueueMessage(msg);
break;
}
case os::Event::MouseEnter: {
_internal_set_mouse_position(osEvent.position());
set_mouse_cursor(kArrowCursor);
lastMouseMoveEvent = osEvent;
break;
}
case os::Event::MouseLeave: {
set_mouse_cursor(kOutsideDisplay);
setMouse(nullptr);
_internal_no_mouse_position();
// To avoid calling kSetCursorMessage when the mouse leaves
// the window.
lastMouseMoveEvent = os::Event();
break;
}
case os::Event::MouseMove: {
_internal_set_mouse_position(osEvent.position());
handleMouseMove(
osEvent.position(),
osEvent.modifiers(),
osEvent.pointerType(),
osEvent.pressure());
lastMouseMoveEvent = osEvent;
break;
}
case os::Event::MouseDown: {
handleMouseDown(
osEvent.position(),
m_mouseButton = mouse_button_from_os_to_ui(osEvent),
osEvent.modifiers(),
osEvent.pointerType());
break;
}
case os::Event::MouseUp: {
handleMouseUp(
osEvent.position(),
mouse_button_from_os_to_ui(osEvent),
osEvent.modifiers(),
osEvent.pointerType());
m_mouseButton = kButtonNone;
break;
}
case os::Event::MouseDoubleClick: {
handleMouseDoubleClick(
osEvent.position(),
m_mouseButton = mouse_button_from_os_to_ui(osEvent),
osEvent.modifiers(),
osEvent.pointerType());
break;
}
case os::Event::MouseWheel: {
handleMouseWheel(osEvent.position(),
osEvent.modifiers(),
osEvent.pointerType(),
osEvent.wheelDelta(),
osEvent.preciseWheel());
break;
}
case os::Event::TouchMagnify: {
_internal_set_mouse_position(osEvent.position());
handleTouchMagnify(osEvent.position(),
osEvent.modifiers(),
osEvent.magnification());
break;
}
case os::Event::Callback: {
// Call from the UI thread
osEvent.execCallback();
break;
}
}
}
// Generate just one kSetCursorMessage for the last mouse position
if (lastMouseMoveEvent.type() != os::Event::None) {
osEvent = lastMouseMoveEvent;
generateSetCursorMessage(osEvent.position(),
osEvent.modifiers(),
osEvent.pointerType());
}
}
void Manager::handleMouseMove(const gfx::Point& mousePos,
const KeyModifiers modifiers,
const PointerType pointerType,
const float pressure)
{
// Get the list of widgets to send mouse messages.
mouse_widgets_list.clear();
broadcastMouseMessage(mouse_widgets_list);
// Get the widget under the mouse
Widget* widget = nullptr;
for (auto mouseWidget : mouse_widgets_list) {
widget = mouseWidget->pick(mousePos);
if (widget) {
// Get the first ancestor of the picked widget that doesn't
// ignore mouse events.
while (widget && widget->hasFlags(IGNORE_MOUSE))
widget = widget->parent();
break;
}
}
// Fixup "mouse" flag
if (widget != mouse_widget) {
if (!widget)
freeMouse();
else
setMouse(widget);
}
// Send the mouse movement message
Widget* dst = (capture_widget ? capture_widget: mouse_widget);
enqueueMessage(
newMouseMessage(
kMouseMoveMessage, dst,
mousePos,
pointerType,
m_mouseButton,
modifiers,
gfx::Point(0, 0),
false,
pressure));
}
void Manager::handleMouseDown(const gfx::Point& mousePos,
MouseButton mouseButton,
KeyModifiers modifiers,
PointerType pointerType)
{
handleWindowZOrder();
enqueueMessage(
newMouseMessage(
kMouseDownMessage,
(capture_widget ? capture_widget: mouse_widget),
mousePos,
pointerType,
mouseButton,
modifiers));
}
void Manager::handleMouseUp(const gfx::Point& mousePos,
MouseButton mouseButton,
KeyModifiers modifiers,
PointerType pointerType)
{
enqueueMessage(
newMouseMessage(
kMouseUpMessage,
(capture_widget ? capture_widget: mouse_widget),
mousePos,
pointerType,
mouseButton,
modifiers));
}
void Manager::handleMouseDoubleClick(const gfx::Point& mousePos,
MouseButton mouseButton,
KeyModifiers modifiers,
PointerType pointerType)
{
Widget* dst = (capture_widget ? capture_widget: mouse_widget);
if (dst) {
enqueueMessage(
newMouseMessage(
kDoubleClickMessage,
dst, mousePos, pointerType,
mouseButton, modifiers));
}
}
void Manager::handleMouseWheel(const gfx::Point& mousePos,
KeyModifiers modifiers,
PointerType pointerType,
const gfx::Point& wheelDelta,
bool preciseWheel)
{
enqueueMessage(newMouseMessage(
kMouseWheelMessage,
(capture_widget ? capture_widget: mouse_widget),
mousePos, pointerType, m_mouseButton, modifiers,
wheelDelta, preciseWheel));
}
void Manager::handleTouchMagnify(const gfx::Point& mousePos,
const KeyModifiers modifiers,
const double magnification)
{
Widget* widget = (capture_widget ? capture_widget: mouse_widget);
if (widget) {
Message* msg = new TouchMessage(
kTouchMagnifyMessage,
modifiers,
mousePos,
magnification);
msg->setRecipient(widget);
enqueueMessage(msg);
}
}
// Handles Z order: Send the window to top (only when you click in a
// window that aren't the desktop).
void Manager::handleWindowZOrder()
{
if (capture_widget || !mouse_widget)
return;
// The clicked window
Window* window = mouse_widget->window();
Manager* win_manager = (window ? window->manager(): nullptr);
if ((window) &&
// We cannot change Z-order of desktop windows
(!window->isDesktop()) &&
// We cannot change Z order of foreground windows because a
// foreground window can launch other background windows
// which should be kept on top of the foreground one.
(!window->isForeground()) &&
// If the window is not already the top window of the manager.
(window != win_manager->getTopWindow())) {
base::ScopedValue<Widget*> scoped(m_lockedWindow, window, nullptr);
// Put it in the top of the list
win_manager->removeChild(window);
if (window->isOnTop())
win_manager->insertChild(0, window);
else {
int pos = (int)win_manager->children().size();
for (auto it=win_manager->children().rbegin(),
end=win_manager->children().rend();
it != end; ++it) {
if (static_cast<Window*>(*it)->isOnTop())
break;
--pos;
}
win_manager->insertChild(pos, window);
}
window->invalidate();
}
// Put the focus
setFocus(mouse_widget);
}
void Manager::dispatchMessages()
{
// Send messages in the queue (mouse/key/timer/etc. events) This
// might change the state of widgets, etc. In case pumpQueue()
// returns a number greater than 0, it means that we've processed
// some messages, so we've to redraw the screen.
if (pumpQueue() > 0 || redrawState == RedrawState::RedrawDelayed) {
// If a window has just been closed with Manager::_closeWindow()
// after processing messages, we'll wait the next event generation
// to process painting events (so the manager doesn't lost the
// DIRTY flag right now).
if (redrawState == RedrawState::AWindowHasJustBeenClosed) {
redrawState = RedrawState::RedrawDelayed;
}
else {
if (redrawState == RedrawState::RedrawDelayed)
redrawState = RedrawState::Normal;
// Generate and send just kPaintMessages with the latest UI state.
flushRedraw();
pumpQueue();
// Flip the back-buffer to the real display.
flipDisplay();
}
}
}
void Manager::addToGarbage(Widget* widget)
{
ASSERT(widget);
m_garbage.push_back(widget);
}
void Manager::enqueueMessage(Message* msg)
{
ASSERT(msg);
if (is_ui_thread())
msg_queue.push_back(msg);
else
concurrent_msg_queue.push(msg);
}
Window* Manager::getTopWindow()
{
return static_cast<Window*>(UI_FIRST_WIDGET(children()));
}
Window* Manager::getForegroundWindow()
{
for (auto child : children()) {
Window* window = static_cast<Window*>(child);
if (window->isForeground() ||
window->isDesktop())
return window;
}
return nullptr;
}
Widget* Manager::getFocus()
{
return focus_widget;
}
Widget* Manager::getMouse()
{
return mouse_widget;
}
Widget* Manager::getCapture()
{
return capture_widget;
}
void Manager::setFocus(Widget* widget)
{
if ((focus_widget != widget)
&& (!(widget)
|| (!(widget->hasFlags(DISABLED))
&& !(widget->hasFlags(HIDDEN))
&& !(widget->hasFlags(DECORATIVE))
&& someParentIsFocusStop(widget)))) {
Widget* commonAncestor = findLowestCommonAncestor(focus_widget, widget);
// Fetch the focus
if (focus_widget && focus_widget != commonAncestor) {
auto msg = new Message(kFocusLeaveMessage);
msg->setRecipient(focus_widget);
msg->setPropagateToParent(true);
msg->setCommonAncestor(commonAncestor);
enqueueMessage(msg);
// Remove HAS_FOCUS from all hierarchy
auto a = focus_widget;
while (a && a != commonAncestor) {
a->disableFlags(HAS_FOCUS);
a = a->parent();
}
}
// Put the focus
focus_widget = widget;
if (widget) {
auto msg = new Message(kFocusEnterMessage);
msg->setRecipient(widget);
msg->setPropagateToParent(true);
msg->setCommonAncestor(commonAncestor);
enqueueMessage(msg);
// Add HAS_FOCUS to all hierarchy
auto a = focus_widget;
while (a && a != commonAncestor) {
if (a->hasFlags(FOCUS_STOP))
a->enableFlags(HAS_FOCUS);
a = a->parent();
}
}
}
}
void Manager::setMouse(Widget* widget)
{
#ifdef REPORT_EVENTS
std::cout << "Manager::setMouse ";
if (widget) {
std::cout << typeid(*widget).name();
if (!widget->id().empty())
std::cout << " (" << widget->id() << ")";
}
else {
std::cout << "null";
}
std::cout << std::endl;
#endif
if ((mouse_widget != widget) && (!capture_widget)) {
Widget* commonAncestor = findLowestCommonAncestor(mouse_widget, widget);
// Fetch the mouse
if (mouse_widget && mouse_widget != commonAncestor) {
auto msg = new Message(kMouseLeaveMessage);
msg->setRecipient(mouse_widget);
msg->setPropagateToParent(true);
msg->setCommonAncestor(commonAncestor);
enqueueMessage(msg);
// Remove HAS_MOUSE from all the hierarchy
auto a = mouse_widget;
while (a && a != commonAncestor) {
a->disableFlags(HAS_MOUSE);
a = a->parent();
}
}
// Put the mouse
mouse_widget = widget;
if (widget) {
auto msg = newMouseMessage(
kMouseEnterMessage, nullptr,
get_mouse_position(),
PointerType::Unknown,
m_mouseButton,
kKeyUninitializedModifier);
msg->setRecipient(widget);
msg->setPropagateToParent(true);
msg->setCommonAncestor(commonAncestor);
enqueueMessage(msg);
generateSetCursorMessage(get_mouse_position(),
kKeyUninitializedModifier,
PointerType::Unknown);
// Add HAS_MOUSE to all the hierarchy
auto a = mouse_widget;
while (a && a != commonAncestor) {
a->enableFlags(HAS_MOUSE);
a = a->parent();
}
}
}
}
void Manager::setCapture(Widget* widget)
{
// To set the capture, we set first the mouse_widget (because
// mouse_widget shouldn't be != capture_widget)
setMouse(widget);
widget->enableFlags(HAS_CAPTURE);
capture_widget = widget;
m_display->captureMouse();
}
// Sets the focus to the "magnetic" widget inside the window
void Manager::attractFocus(Widget* widget)
{
// Get the magnetic widget
Widget* magnet = findMagneticWidget(widget->window());
// If magnetic widget exists and it doesn't have the focus
if (magnet && !magnet->hasFocus())
setFocus(magnet);
}
void Manager::focusFirstChild(Widget* widget)
{
for (Widget* it=widget->window(); it; it=next_widget(it)) {
if (does_accept_focus(it) && !(child_accept_focus(it, true))) {
setFocus(it);
break;
}
}
}
void Manager::freeFocus()
{
setFocus(nullptr);
}
void Manager::freeMouse()
{
setMouse(nullptr);
}
void Manager::freeCapture()
{
if (capture_widget) {
capture_widget->disableFlags(HAS_CAPTURE);
capture_widget = nullptr;
m_display->releaseMouse();
}
}
void Manager::freeWidget(Widget* widget)
{
#ifdef DEBUG_UI_THREADS
ASSERT(manager_thread == base::this_thread::native_id());
#endif
if (widget->hasFocus() || (widget == focus_widget))
freeFocus();
// We shouldn't free widgets that are locked, it means, widgets that
// will be re-added soon (e.g. when the stack of windows is
// temporarily modified).
if (m_lockedWindow == widget)
return;
// Break any relationship with the GUI manager
if (widget->hasCapture() || (widget == capture_widget))
freeCapture();
if (widget->hasMouse() || (widget == mouse_widget))
freeMouse();
auto it = std::find(mouse_widgets_list.begin(),
mouse_widgets_list.end(),
widget);
if (it != mouse_widgets_list.end())
mouse_widgets_list.erase(it);
ASSERT(!Manager::widgetAssociatedToManager(widget));
}
void Manager::removeMessagesFor(Widget* widget)
{
#ifdef DEBUG_UI_THREADS
ASSERT(manager_thread == base::this_thread::native_id());
#endif
for (Message* msg : msg_queue)
msg->removeRecipient(widget);
for (Message* msg : used_msg_queue)
msg->removeRecipient(widget);
}
void Manager::removeMessagesFor(Widget* widget, MessageType type)
{
#ifdef DEBUG_UI_THREADS
ASSERT(manager_thread == base::this_thread::native_id());
#endif
for (Message* msg : msg_queue)
if (msg->type() == type)
msg->removeRecipient(widget);
for (Message* msg : used_msg_queue)
if (msg->type() == type)
msg->removeRecipient(widget);
}
void Manager::removeMessagesForTimer(Timer* timer)
{
#ifdef DEBUG_UI_THREADS
ASSERT(manager_thread == base::this_thread::native_id());
#endif
for (auto it=msg_queue.begin(); it != msg_queue.end(); ) {
Message* msg = *it;
if (msg->type() == kTimerMessage &&
static_cast<TimerMessage*>(msg)->timer() == timer) {
delete msg;
it = msg_queue.erase(it);
}
else
++it;
}
}
void Manager::addMessageFilter(int message, Widget* widget)
{