Add Qt::SubView example.

Change-Id: I9718de6db6672b539f0d5dd36c94dbbdd4604ed7
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>

4 files changed, 406 insertions, 0 deletions

diff --git a/examples/embeddedqwindow/embeddedqwindow.pro b/examples/embeddedqwindow/embeddedqwindow.pro
new file mode 100644
index 0000000..73a0ae4
--- /dev/null
+++ b/examples/embeddedqwindow/embeddedqwindow.pro
@@ -0,0 +1,11 @@
+TEMPLATE = app
+
+OBJECTIVE_SOURCES += main.mm
+HEADERS += window.h
+SOURCES += window.cpp
+LIBS += -framework Cocoa
+
+QT += gui widgets 
+QT += widgets-private gui-private core-private
+
+DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0
diff --git a/examples/embeddedqwindow/main.mm b/examples/embeddedqwindow/main.mm
new file mode 100644
index 0000000..89ae8b8
--- /dev/null
+++ b/examples/embeddedqwindow/main.mm
@@ -0,0 +1,116 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "window.h"
+
+#include <QtGui>
+#include <qpa/qplatformnativeinterface.h>
+
+
+#include <Cocoa/Cocoa.h>
+
+
+NSView *getEmbeddableView(QWindow *qtWindow)
+{
+    // Set Qt::SubWindow flag. Should be done before crate() is
+    // called - if you call create() or caused it ot be called
+    // before calling this function you need to set SubWindow
+    // yourself
+    qtWindow->setFlags(qtWindow->flags() | Qt::SubWindow);
+
+    // Make sure the platform window is created
+    qtWindow->create();
+
+    // Get the Qt content NSView for the QWindow forom the Qt platform plugin
+    QPlatformNativeInterface *platformNativeInterface = QGuiApplication::platformNativeInterface();
+    NSView *qtView = (NSView *)platformNativeInterface->nativeResourceForWindow("nsview", qtWindow);
+    return qtView; // qtView is ready for use.
+}
+
+@interface WindowCreator : NSObject {}
+- (void)createWindow;
+@end
+
+@implementation WindowCreator
+- (void)createWindow {	
+
+    // 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"];
+    [window setBackgroundColor:[NSColor blueColor]]; // if you see blue something is wrong
+
+    // Create the QWindow and embed its view.
+    Window *qtWindow = new Window(); // ### who owns this window?
+    NSView *qtView = getEmbeddableView(qtWindow);
+    [window setContentView:qtView];
+
+    // Show the NSWindow
+    [window makeKeyAndOrderFront:NSApp];
+}
+@end
+
+int main(int argc, char *argv[])
+{
+    QGuiApplication app(argc, argv);
+
+    // Start Cocoa. Create NSApplicaiton.
+    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
+    [NSApplication sharedApplication];
+
+    // Schedule call to create the UI using a timer.
+    WindowCreator *windowCreator= [WindowCreator alloc];
+    [NSTimer scheduledTimerWithTimeInterval:0 target:windowCreator selector:@selector(createWindow) userInfo:nil repeats:NO];
+
+    // Starte the Cocoa event loop.
+    [(NSApplication *)NSApp run];
+    [NSApp release];
+    [pool release];
+    exit(0);
+    return 0;
+}
+
+
+
diff --git a/examples/embeddedqwindow/window.cpp b/examples/embeddedqwindow/window.cpp
new file mode 100644
index 0000000..8ae918c
--- /dev/null
+++ b/examples/embeddedqwindow/window.cpp
@@ -0,0 +1,205 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "window.h"
+
+#include <private/qguiapplication_p.h>
+
+#include <QBackingStore>
+#include <QPainter>
+#include <QtWidgets>
+
+static int colorIndexId = 0;
+
+QColor colorTable[] =
+{
+    QColor("#f09f8f"),
+    QColor("#a2bff2"),
+    QColor("#c0ef8f")
+};
+
+Window::Window(QScreen *screen)
+    : QWindow(screen)
+    , m_backgroundColorIndex(colorIndexId++)
+{
+    initialize();
+}
+
+Window::Window(QWindow *parent)
+    : QWindow(parent)
+    , m_backgroundColorIndex(colorIndexId++)
+{
+    initialize();
+}
+
+void Window::initialize()
+{
+    if (parent())
+        setGeometry(QRect(160, 120, 320, 240));
+    else {
+        setGeometry(QRect(10, 10, 640, 480));
+
+        setSizeIncrement(QSize(10, 10));
+        setBaseSize(QSize(640, 480));
+        setMinimumSize(QSize(240, 160));
+        setMaximumSize(QSize(800, 600));
+    }
+
+    setFlags(flags() | Qt::SubWindow); // Don't create a toplevel window.
+
+    create();
+    m_backingStore = new QBackingStore(this);
+
+    m_image = QImage(geometry().size(), QImage::Format_RGB32);
+    m_image.fill(colorTable[m_backgroundColorIndex % (sizeof(colorTable) / sizeof(colorTable[0]))].rgba());
+
+    m_lastPos = QPoint(-1, -1);
+    m_renderTimer = 0;
+}
+
+void Window::mousePressEvent(QMouseEvent *event)
+{
+    m_lastPos = event->pos();
+}
+
+void Window::mouseMoveEvent(QMouseEvent *event)
+{
+    if (m_lastPos != QPoint(-1, -1)) {
+        QPainter p(&m_image);
+        p.setRenderHint(QPainter::Antialiasing);
+        p.drawLine(m_lastPos, event->pos());
+        m_lastPos = event->pos();
+    }
+
+    scheduleRender();
+}
+
+void Window::mouseReleaseEvent(QMouseEvent *event)
+{
+    if (m_lastPos != QPoint(-1, -1)) {
+        QPainter p(&m_image);
+        p.setRenderHint(QPainter::Antialiasing);
+        p.drawLine(m_lastPos, event->pos());
+        m_lastPos = QPoint(-1, -1);
+    }
+
+    scheduleRender();
+}
+
+void Window::exposeEvent(QExposeEvent *)
+{
+    scheduleRender();
+}
+
+void Window::resizeEvent(QResizeEvent *)
+{
+    QImage old = m_image;
+
+    //qDebug() << "Window::resizeEvent" << width << height;
+
+    int width = qMax(geometry().width(), old.width());
+    int height = qMax(geometry().height(), old.height());
+
+    if (width > old.width() || height > old.height()) {
+        m_image = QImage(width, height, QImage::Format_RGB32);
+        m_image.fill(colorTable[(m_backgroundColorIndex) % (sizeof(colorTable) / sizeof(colorTable[0]))].rgba());
+
+        QPainter p(&m_image);
+        p.drawImage(0, 0, old);
+    }
+
+    render();
+}
+
+void Window::keyPressEvent(QKeyEvent *event)
+{
+    switch (event->key()) {
+    case Qt::Key_Backspace:
+        m_text.chop(1);
+        break;
+    case Qt::Key_Enter:
+    case Qt::Key_Return:
+        m_text.append('\n');
+        break;
+    default:
+        m_text.append(event->text());
+        break;
+    }
+    scheduleRender();
+}
+
+void Window::scheduleRender()
+{
+    if (!m_renderTimer)
+        m_renderTimer = startTimer(1);
+}
+
+void Window::timerEvent(QTimerEvent *)
+{
+    render();
+    killTimer(m_renderTimer);
+    m_renderTimer = 0;
+}
+
+void Window::render()
+{
+    QRect rect(QPoint(), geometry().size());
+
+    m_backingStore->resize(rect.size());
+
+    m_backingStore->beginPaint(rect);
+
+    QPaintDevice *device = m_backingStore->paintDevice();
+
+    QPainter p(device);
+    p.drawImage(0, 0, m_image);
+
+    QFont font;
+    font.setPixelSize(32);
+
+    p.setFont(font);
+    p.drawText(rect, 0, m_text);
+
+    m_backingStore->endPaint();
+    m_backingStore->flush(rect);
+}
+
+
diff --git a/examples/embeddedqwindow/window.h b/examples/embeddedqwindow/window.h
new file mode 100644
index 0000000..cdd6ebd
--- /dev/null
+++ b/examples/embeddedqwindow/window.h
@@ -0,0 +1,74 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QWindow>
+#include <QImage>
+
+class Window : public QWindow
+{
+public:
+    Window(QWindow *parent = 0);
+    Window(QScreen *screen);
+
+protected:
+    void mousePressEvent(QMouseEvent *);
+    void mouseMoveEvent(QMouseEvent *);
+    void mouseReleaseEvent(QMouseEvent *);
+
+    void keyPressEvent(QKeyEvent *);
+
+    void exposeEvent(QExposeEvent *);
+    void resizeEvent(QResizeEvent *);
+
+    void timerEvent(QTimerEvent *);
+
+private:
+    void render();
+    void scheduleRender();
+    void initialize();
+
+    QString m_text;
+    QImage m_image;
+    QPoint m_lastPos;
+    int m_backgroundColorIndex;
+    QBackingStore *m_backingStore;
+    int m_renderTimer;
+};