source: trunk/src/gui/kernel/qcocoawindowdelegate_mac.mm@ 651

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#import "private/qcocoawindowdelegate_mac_p.h"
#ifdef QT_MAC_USE_COCOA
#include <private/qwidget_p.h>
#include <private/qapplication_p.h>
#include <private/qt_cocoa_helpers_mac_p.h>
#include <qevent.h>
#include <qlayout.h>
#include <qcoreapplication.h>
#include <qmenubar.h>

QT_BEGIN_NAMESPACE
extern QWidgetData *qt_qwidget_data(QWidget *); // qwidget.cpp
extern void onApplicationWindowChangedActivation(QWidget *, bool); //qapplication_mac.mm
extern bool qt_sendSpontaneousEvent(QObject *, QEvent *); // qapplication.cpp
QT_END_NAMESPACE

QT_USE_NAMESPACE

static QT_MANGLE_NAMESPACE(QCocoaWindowDelegate) *sharedCocoaWindowDelegate = nil;

// This is a singleton, but unlike most Cocoa singletons, it lives in a library and could be
// pontentially loaded and unloaded. This means we should at least attempt to do the
// memory management correctly.

static void cleanupCocoaWindowDelegate()
{
    [sharedCocoaWindowDelegate release];
}

@implementation QT_MANGLE_NAMESPACE(QCocoaWindowDelegate)

- (id)init
{
    self = [super init];
    if (self != nil) {
        m_windowHash = new QHash<NSWindow *, QWidget *>();
        m_drawerHash = new QHash<NSDrawer *, QWidget *>();
    }
    return self;
}

- (void)dealloc
{
    sharedCocoaWindowDelegate = nil;
    QHash<NSWindow *, QWidget *>::const_iterator windowIt = m_windowHash->constBegin();
    while (windowIt != m_windowHash->constEnd()) {
        [windowIt.key() setDelegate:nil];
        ++windowIt;
    }
    delete m_windowHash;
    QHash<NSDrawer *, QWidget *>::const_iterator drawerIt = m_drawerHash->constBegin();
    while (drawerIt != m_drawerHash->constEnd()) {
        [drawerIt.key() setDelegate:nil];
        ++drawerIt;
    }
    delete m_drawerHash;
    [super dealloc];
}

+ (id)allocWithZone:(NSZone *)zone
{
    @synchronized(self) {
        if (sharedCocoaWindowDelegate == nil) {
            sharedCocoaWindowDelegate = [super allocWithZone:zone];
            return sharedCocoaWindowDelegate;
            qAddPostRoutine(cleanupCocoaWindowDelegate);
        }
    }
    return nil;
}

+ (QT_MANGLE_NAMESPACE(QCocoaWindowDelegate)*)sharedDelegate
{
    @synchronized(self) {
        if (sharedCocoaWindowDelegate == nil)
            [[self alloc] init];
    }
    return [[sharedCocoaWindowDelegate retain] autorelease];
}

-(void)syncSizeForWidget:(QWidget *)qwidget toSize:(const QSize &)newSize fromSize:(const QSize &)oldSize
{
    qt_qwidget_data(qwidget)->crect.setSize(newSize);
    // ### static contents optimization needs to go here
    const OSViewRef view = qt_mac_nativeview_for(qwidget);
    [view setFrameSize:NSMakeSize(newSize.width(), newSize.height())];
    if (!qwidget->isVisible()) {
        qwidget->setAttribute(Qt::WA_PendingResizeEvent, true);
    } else {
        QResizeEvent qre(newSize, oldSize);
        if (qwidget->testAttribute(Qt::WA_PendingResizeEvent)) {
            qwidget->setAttribute(Qt::WA_PendingResizeEvent, false);
            QApplication::sendEvent(qwidget, &qre);
        } else {
            qt_sendSpontaneousEvent(qwidget, &qre);
        }
    }
}