QNX: QQnxCursor implementation.

Implementation of QQnxCursor, a QPlatformCursor subclass. Due to the lack of a
proper cursor API from the underlying OS, this class only caches the current
cursor position to make sure that the QCursor class works properly.

This is a backport of 290ed7f8fa.
At the time there weren't any known bugs regarding this, so it was committed
to "dev" branch as a feature.

Now we needed it in "stable", otherwise menus don't work correctly, due to
QCursor::pos() being bogus.

Change-Id: I5a4217c92a0aaed0b22b45ca3c4e0fad882e810f
Reviewed-by: Rafael Roquetto <rafael.roquetto@kdab.com>

src/plugins/platforms/qnx/qnx.pro

@@ -39,6 +39,7 @@ CONFIG(blackberry) {
 #DEFINES += QQNXSCREEN_DEBUG
 #DEFINES += QQNXVIRTUALKEYBOARD_DEBUG
 #DEFINES += QQNXWINDOW_DEBUG
+#DEFINES += QQNXCURSOR_DEBUG
 
 
 SOURCES =   main.cpp \
@@ -54,7 +55,8 @@ SOURCES =   main.cpp \
             qqnxnavigatoreventhandler.cpp \
             qqnxabstractnavigator.cpp \
             qqnxabstractvirtualkeyboard.cpp \
-            qqnxservices.cpp
+            qqnxservices.cpp \
+            qqnxcursor.cpp
 
 HEADERS =   main.h \
             qqnxbuffer.h \
@@ -70,7 +72,8 @@ HEADERS =   main.h \
             qqnxnavigatoreventhandler.h \
             qqnxabstractnavigator.h \
             qqnxabstractvirtualkeyboard.h \
-            qqnxservices.h
+            qqnxservices.h \
+            qqnxcursor.h
 
 LIBS += -lscreen
 

src/plugins/platforms/qnx/qqnxcursor.cpp

@@ -0,0 +1,78 @@
+/***************************************************************************
+**
+** Copyright (C) 2011 - 2012 Research In Motion
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the plugins 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 "qqnxcursor.h"
+
+#include <QtCore/QDebug>
+
+#ifdef QQNXCURSOR_DEBUG
+#define qCursorDebug qDebug
+#else
+#define qCursorDebug QT_NO_QDEBUG_MACRO
+#endif
+
+QT_BEGIN_NAMESPACE
+
+QQnxCursor::QQnxCursor()
+{
+}
+
+#ifndef QT_NO_CURSOR
+void QQnxCursor::changeCursor(QCursor *windowCursor, QWindow *window)
+{
+    Q_UNUSED(windowCursor);
+    Q_UNUSED(window);
+}
+#endif
+
+void QQnxCursor::setPos(const QPoint &pos)
+{
+    qCursorDebug() << "QQnxCursor::setPos -" << pos;
+    m_pos = pos;
+}
+
+QPoint QQnxCursor::pos() const
+{
+    qCursorDebug() << "QQnxCursor::pos -" << m_pos;
+    return m_pos;
+}
+
+QT_END_NAMESPACE

src/plugins/platforms/qnx/qqnxcursor.h

@@ -0,0 +1,67 @@
+/***************************************************************************
+**
+** Copyright (C) 2011 - 2012 Research In Motion
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the plugins 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QQNXCURSOR_H
+#define QQNXCURSOR_H
+
+#include <qpa/qplatformcursor.h>
+
+QT_BEGIN_NAMESPACE
+
+class QQnxCursor : public QPlatformCursor
+{
+public:
+    QQnxCursor();
+
+#ifndef QT_NO_CURSOR
+    void changeCursor(QCursor *windowCursor, QWindow *window);
+#endif
+    void setPos(const QPoint &pos);
+
+    QPoint pos() const;
+
+private:
+    QPoint m_pos;
+};
+
+QT_END_NAMESPACE
+
+#endif // QQNXCURSOR_H

src/plugins/platforms/qnx/qqnxscreen.cpp

@@ -41,6 +41,7 @@
 
 #include "qqnxscreen.h"
 #include "qqnxwindow.h"
+#include "qqnxcursor.h"
 
 #include <QtCore/QThread>
 #include <QtCore/QDebug>
@@ -110,7 +111,8 @@ QQnxScreen::QQnxScreen(screen_context_t screenContext, screen_display_t display,
       m_posted(false),
       m_keyboardHeight(0),
       m_nativeOrientation(Qt::PrimaryOrientation),
-      m_platformContext(0)
+      m_platformContext(0),
+      m_cursor(new QQnxCursor())
 {
     qScreenDebug() << Q_FUNC_INFO;
     // Cache initial orientation of this display
@@ -149,6 +151,8 @@ QQnxScreen::QQnxScreen(screen_context_t screenContext, screen_display_t display,
 QQnxScreen::~QQnxScreen()
 {
     qScreenDebug() << Q_FUNC_INFO;
+
+    delete m_cursor;
 }
 
 static int defaultDepth()
@@ -492,6 +496,11 @@ void QQnxScreen::onWindowPost(QQnxWindow *window)
     }
 }
 
+QPlatformCursor * QQnxScreen::cursor() const
+{
+    return m_cursor;
+}
+
 void QQnxScreen::keyboardHeightChanged(int height)
 {
     if (height == m_keyboardHeight)

src/plugins/platforms/qnx/qqnxscreen.h

@@ -95,6 +95,8 @@ public:
 
     QSharedPointer<QQnxRootWindow> rootWindow() const;
 
+    QPlatformCursor *cursor() const;
+
 public Q_SLOTS:
     void setRotation(int rotation);
     void newWindowCreated(void *window);
@@ -130,6 +132,8 @@ private:
 
     QList<QQnxWindow *> m_childWindows;
     QList<screen_window_t> m_overlays;
+
+    QPlatformCursor *m_cursor;
 };
 
 QT_END_NAMESPACE

src/plugins/platforms/qnx/qqnxscreeneventhandler.cpp

@@ -347,6 +347,8 @@ void QQnxScreenEventHandler::handleTouchEvent(screen_event_t event, int qnxType)
         qFatal("QQNX: failed to query event position, errno=%d", errno);
     }
 
+    QCursor::setPos(pos[0], pos[1]);
+
     // get window coordinates of touch
     errno = 0;
     int windowPos[2];