Port QMacNativeWidget to Qt 5

Also adds examples/widgets/mac subdir for Mac specific examples,
starting with one for this feature.

Change-Id: I4cc7d84ce3d7562259d6206faa5d6996c2392a3e
Reviewed-by: Liang Qi <liang.qi@digia.com>

3 files changed, 154 insertions, 0 deletions

diff --git a/examples/widgets/mac/mac.pro b/examples/widgets/mac/mac.pro
new file mode 100644
index 0000000000..c5f8bf826f
--- /dev/null
+++ b/examples/widgets/mac/mac.pro
@@ -0,0 +1,5 @@
+TEMPLATE = subdirs
+macx {
+    SUBDIRS = \
+            qmacnativewidget
+}
\ No newline at end of file
diff --git a/examples/widgets/mac/qmacnativewidget/main.mm b/examples/widgets/mac/qmacnativewidget/main.mm
new file mode 100644
index 0000000000..28cf2adc3b
--- /dev/null
+++ b/examples/widgets/mac/qmacnativewidget/main.mm
@@ -0,0 +1,142 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#import <Cocoa/Cocoa.h>
+
+#include <QApplication>
+#include <QDebug>
+#include <QHBoxLayout>
+#include <QLineEdit>
+#include <QPainter>
+#include <QPushButton>
+#include <QVBoxLayout>
+#include <QWidget>
+#include <QMacNativeWidget>
+
+class RedWidget : public QWidget
+{
+public:
+    RedWidget() {
+
+    }
+
+    void resizeEvent(QResizeEvent *)
+    {
+        qDebug() << "RedWidget::resize" << size();
+    }
+
+    void paintEvent(QPaintEvent *event)
+    {
+        QPainter p(this);
+        Q_UNUSED(event);
+        QRect rect(QPoint(0, 0), size());
+        qDebug() << "Painting geometry" << rect;
+        p.fillRect(rect, QColor(133, 50, 50));
+    }
+};
+
+namespace {
+int qtArgc = 0;
+char **qtArgv;
+QApplication *qtApp = 0;
+}
+
+@interface WindowCreator : NSObject {}
+- (void)createWindow;
+@end
+
+@implementation WindowCreator
+- (void)createWindow {
+    // Qt widgets rely on a QApplication being alive somewhere
+    qtApp = new QApplication(qtArgc, qtArgv);
+
+    // Create the NSWindow
+    NSRect frame = NSMakeRect(500, 500, 500, 500);
+    NSWindow* window  = [[NSWindow alloc] initWithContentRect:frame
+                        styleMask:NSTitledWindowMask |  NSClosableWindowMask | NSMiniaturizableWindowMask | NSResizableWindowMask
+                        backing:NSBackingStoreBuffered
+                        defer:NO];
+    [window setTitle:@"NSWindow"];
+
+    // Create widget hierarchy with QPushButton and QLineEdit
+    QMacNativeWidget *nativeWidget = new QMacNativeWidget();
+    // Get the NSView for QMacNativeWidget and set it as the content view for the NSWindow
+    [window setContentView:nativeWidget->nativeView()];
+
+    QHBoxLayout *hlayout = new QHBoxLayout();
+    hlayout->addWidget(new QPushButton("Push", nativeWidget));
+    hlayout->addWidget(new QLineEdit(nativeWidget));
+
+    QVBoxLayout *vlayout = new QVBoxLayout();
+    vlayout->addLayout(hlayout);
+
+    //RedWidget * redWidget = new RedWidget;
+    //vlayout->addWidget(redWidget);
+
+    nativeWidget->setLayout(vlayout);
+
+
+    // show() must be called on nativeWiget to get the widgets int he correct state.
+    nativeWidget->show();
+
+    // Show the NSWindow
+    [window makeKeyAndOrderFront:NSApp];
+}
+@end
+
+int main(int argc, char *argv[])
+{
+    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
+
+    // Normally, we would use the application delegate.
+    // We resort to the notification mechanism for conciseness.
+    WindowCreator *windowCreator= [WindowCreator alloc];
+    [[NSNotificationCenter defaultCenter]
+            addObserver:windowCreator selector:@selector(createWindow)
+            name:NSApplicationDidFinishLaunchingNotification object:nil];
+
+    // Save these for QApplication
+    qtArgc = argc;
+    qtArgv = argv;
+
+    // Other than the few lines above, it's business as usual...
+    return NSApplicationMain(argc, (const char **)argv);
+}
diff --git a/examples/widgets/mac/qmacnativewidget/qmacnativewidget.pro b/examples/widgets/mac/qmacnativewidget/qmacnativewidget.pro
new file mode 100644
index 0000000000..cafff9f035
--- /dev/null
+++ b/examples/widgets/mac/qmacnativewidget/qmacnativewidget.pro
@@ -0,0 +1,7 @@
+TEMPLATE = app
+
+OBJECTIVE_SOURCES += main.mm
+LIBS += -framework Cocoa
+
+QT += widgets
+#QT += widgets-private gui-private core-private