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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#import <Cocoa/Cocoa.h>
#include <private/qwidget_p.h>
#include "qmaccocoaviewcontainer_mac.h"
#include <private/qt_mac_p.h>
/*!
\class QMacCocoaViewContainer
\since 4.5
\brief The QMacCocoaViewContainer class provides a widget for Mac OS X that can be used to wrap arbitrary
Cocoa views (i.e., NSView subclasses) and insert them into Qt hierarchies.
\ingroup advanced
While Qt offers a lot of classes for writing your application, Apple's
Cocoa framework offers lots of functionality that is not currently in Qt or
may never end up in Qt. Using QMacCocoaViewContainer, it is possible to put an
arbitrary NSView-derived class from Cocoa and put it in a Qt hierarchy.
Depending on how comfortable you are with using objective-C, you can use
QMacCocoaViewContainer directly, or subclass it to wrap further functionality
of the underlying NSView.
QMacCocoaViewContainer works regardless if Qt is built against Carbon or
Cocoa. However, QCocoaContainerView requires Mac OS X 10.5 or better to be
used with Carbon.
It should be also noted that at the low level on Mac OS X, there is a
difference between windows (top-levels) and view (widgets that are inside a
window). For this reason, make sure that the NSView that you are wrapping
doesn't end up as a top-level. The best way to ensure this is to make sure
you always have a parent and not set the parent to 0.
If you are using QMacCocoaViewContainer as a sub-class and are mixing and
matching objective-C with C++ (a.k.a. objective-C++). It is probably
simpler to have your file end with \tt{.mm} than \tt{.cpp}. Most Apple tools will
correctly identify the source as objective-C++.
QMacCocoaViewContainer requires knowledge of how Cocoa works, especially in
regard to its reference counting (retain/release) nature. It is noted in
the functions below if there is any change in the reference count. Cocoa
views often generate temporary objects that are released by an autorelease
pool. If this is done outside of a running event loop, it is up to the
developer to provide the autorelease pool.
The following is a snippet of subclassing QMacCocoaViewContainer to wrap a NSSearchField.
\snippet demos/macmainwindow/macmainwindow.mm 0
*/
QT_BEGIN_NAMESPACE
class QMacCocoaViewContainerPrivate : public QWidgetPrivate
{
Q_DECLARE_PUBLIC(QMacCocoaViewContainer)
public:
NSView *nsview;
#ifndef QT_MAC_USE_COCOA
HIViewRef wrapperView;
#endif
QMacCocoaViewContainerPrivate();
~QMacCocoaViewContainerPrivate();
};
QMacCocoaViewContainerPrivate::QMacCocoaViewContainerPrivate()
: nsview(0)
#ifndef QT_MAC_USE_COCOA
, wrapperView(0)
#endif
{
}
QMacCocoaViewContainerPrivate::~QMacCocoaViewContainerPrivate()
{
[nsview release];
#ifndef QT_MAC_USE_COCOA
if (wrapperView)
CFRelease(wrapperView);
#endif
}
/*!
\fn QMacCocoaViewContainer::QMacCocoaViewContainer(void *cocoaViewToWrap, QWidget *parent)
Create a new QMacCocoaViewContainer using the NSView pointer in \a
cocoaViewToWrap with parent, \a parent. QMacCocoaViewContainer will
retain \a cocoaViewToWrap.
\a cocoaViewToWrap is a void pointer that allows the header to be included
with C++ source.
*/
QMacCocoaViewContainer::QMacCocoaViewContainer(void *cocoaViewToWrap, QWidget *parent)
: QWidget(*new QMacCocoaViewContainerPrivate, parent, 0)
{
if (cocoaViewToWrap)
setCocoaView(cocoaViewToWrap);
}
/*!
Destroy the QMacCocoaViewContainer and release the wrapped view.
*/
QMacCocoaViewContainer::~QMacCocoaViewContainer()
{
}
/*!
Returns the NSView that has been set on this container. The returned view
has been autoreleased, so you will need to retain it if you want to make
use of it.
*/
void *QMacCocoaViewContainer::cocoaView() const
{
Q_D(const QMacCocoaViewContainer);
return [[d->nsview retain] autorelease];
}
/*!
Sets the NSView to contain to be \a cocoaViewToWrap and retains it. If this
container already had a view set, it will release the previously set view.
*/
void QMacCocoaViewContainer::setCocoaView(void *cocoaViewToWrap)
{
Q_D(QMacCocoaViewContainer);
QMacCocoaAutoReleasePool pool;
NSView *view = static_cast<NSView *>(cocoaViewToWrap);
NSView *oldView = d->nsview;
destroy(true, true);
[view retain];
d->nsview = view;
#ifndef QT_MAC_USE_COCOA
if (QSysInfo::MacintoshVersion < QSysInfo::MV_10_5) {
qWarning("QMacCocoaViewContainer::setCocoaView: You cannot use this class with Carbon on versions of Mac OS X less than 10.5.");
return;
}
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
if (d->wrapperView)
CFRelease(d->wrapperView);
HICocoaViewCreate(d->nsview, 0, &d->wrapperView);
create(WId(d->wrapperView), false, true);
#endif
#else
create(WId(d->nsview), false, true);
#endif
[oldView release];
}
QT_END_NAMESPACE
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