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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 573 insertions, 0 deletions

diff --git a/src/gui/kernel/qcursor.cpp b/src/gui/kernel/qcursor.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qcursor.h"
+
+#ifndef QT_NO_CURSOR
+
+#include <qapplication.h>
+#include <qbitmap.h>
+#include <qimage.h>
+#include <qdatastream.h>
+#include <qvariant.h>
+#include <private/qcursor_p.h>
+
+QT_BEGIN_NAMESPACE
+
+/*!
+    \class QCursor
+
+    \brief The QCursor class provides a mouse cursor with an arbitrary
+    shape.
+
+    \ingroup appearance
+    \ingroup shared
+
+
+    This class is mainly used to create mouse cursors that are
+    associated with particular widgets and to get and set the position
+    of the mouse cursor.
+
+    Qt has a number of standard cursor shapes, but you can also make
+    custom cursor shapes based on a QBitmap, a mask and a hotspot.
+
+    To associate a cursor with a widget, use QWidget::setCursor(). To
+    associate a cursor with all widgets (normally for a short period
+    of time), use QApplication::setOverrideCursor().
+
+    To set a cursor shape use QCursor::setShape() or use the QCursor
+    constructor which takes the shape as argument, or you can use one
+    of the predefined cursors defined in the \l Qt::CursorShape enum.
+
+    If you want to create a cursor with your own bitmap, either use
+    the QCursor constructor which takes a bitmap and a mask or the
+    constructor which takes a pixmap as arguments.
+
+    To set or get the position of the mouse cursor use the static
+    methods QCursor::pos() and QCursor::setPos().
+
+    \bold{Note:} It is possible to create a QCursor before
+    QApplication, but it is not useful except as a place-holder for a
+    real QCursor created after QApplication. Attempting to use a
+    QCursor that was created before QApplication will result in a
+    crash.
+
+    \section1 A Note for X11 Users
+
+    On X11, Qt supports the \link
+    http://www.xfree86.org/4.3.0/Xcursor.3.html Xcursor\endlink
+    library, which allows for full color icon themes. The table below
+    shows the cursor name used for each Qt::CursorShape value. If a
+    cursor cannot be found using the name shown below, a standard X11
+    cursor will be used instead. Note: X11 does not provide
+    appropriate cursors for all possible Qt::CursorShape values. It
+    is possible that some cursors will be taken from the Xcursor
+    theme, while others will use an internal bitmap cursor.
+
+    \table
+    \header \o Shape \o Qt::CursorShape Value \o Cursor Name
+            \o Shape \o Qt::CursorShape Value \o Cursor Name
+    \row \o \inlineimage cursor-arrow.png
+         \o Qt::ArrowCursor   \o \c left_ptr
+         \o \inlineimage      cursor-sizev.png
+         \o Qt::SizeVerCursor \o \c size_ver
+    \row \o \inlineimage      cursor-uparrow.png
+         \o Qt::UpArrowCursor \o \c up_arrow
+         \o \inlineimage      cursor-sizeh.png
+         \o Qt::SizeHorCursor \o \c size_hor
+    \row \o \inlineimage      cursor-cross.png
+         \o Qt::CrossCursor   \o \c cross
+         \o \inlineimage      cursor-sizeb.png
+         \o Qt::SizeBDiagCursor \o \c size_bdiag
+    \row \o \inlineimage      cursor-ibeam.png
+         \o Qt::IBeamCursor   \o \c ibeam
+         \o \inlineimage      cursor-sizef.png
+         \o Qt::SizeFDiagCursor \o \c size_fdiag
+    \row \o \inlineimage      cursor-wait.png
+         \o Qt::WaitCursor    \o \c wait
+         \o \inlineimage      cursor-sizeall.png
+         \o Qt::SizeAllCursor \o \c size_all
+    \row \o \inlineimage      cursor-busy.png
+         \o Qt::BusyCursor    \o \c left_ptr_watch
+         \o \inlineimage      cursor-vsplit.png
+         \o Qt::SplitVCursor  \o \c split_v
+    \row \o \inlineimage      cursor-forbidden.png
+         \o Qt::ForbiddenCursor \o \c forbidden
+         \o \inlineimage      cursor-hsplit.png
+         \o Qt::SplitHCursor  \o \c split_h
+    \row \o \inlineimage      cursor-hand.png
+         \o Qt::PointingHandCursor \o \c pointing_hand
+         \o \inlineimage      cursor-openhand.png
+         \o Qt::OpenHandCursor  \o \c openhand
+    \row \o \inlineimage      cursor-whatsthis.png
+         \o Qt::WhatsThisCursor \o \c whats_this
+         \o \inlineimage      cursor-closedhand.png
+         \o Qt::ClosedHandCursor \o \c closedhand
+    \row \o
+         \o Qt::DragMoveCursor      \o \c dnd-move or \c move
+         \o
+         \o Qt::DragCopyCursor      \o \c dnd-copy or \c copy
+    \row \o
+         \o Qt::DragLinkCursor      \o \c dnd-link or \c link
+    \endtable
+
+    \sa QWidget, {fowler}{GUI Design Handbook: Cursors}
+*/
+
+/*!
+    \fn HCURSOR_or_HANDLE QCursor::handle() const
+
+    Returns a platform-specific cursor handle. The \c
+    HCURSOR_or_HANDLE type is \c HCURSOR on Windows and Qt::HANDLE on X11
+    and Mac OS X. On \l{Qt for Embedded Linux} it is an integer.
+
+    \warning Using the value returned by this function is not
+    portable.
+*/
+
+/*!
+    \fn QCursor::QCursor(HCURSOR cursor)
+
+    Constructs a Qt cursor from the given Windows \a cursor.
+
+    \warning This function is only available on Windows.
+
+    \sa handle()
+*/
+
+/*!
+    \fn QCursor::QCursor(Qt::HANDLE handle)
+
+    Constructs a Qt cursor from the given \a handle.
+
+    \warning This function is only available on X11.
+
+    \sa handle()
+*/
+
+/*!
+    \fn QPoint QCursor::pos()
+
+    Returns the position of the cursor (hot spot) in global screen
+    coordinates.
+
+    You can call QWidget::mapFromGlobal() to translate it to widget
+    coordinates.
+
+    \sa setPos(), QWidget::mapFromGlobal(), QWidget::mapToGlobal()
+*/
+
+/*!
+    \fn void QCursor::setPos(int x, int y)
+
+    Moves the cursor (hot spot) to the global screen position (\a x,
+    \a y).
+
+    You can call QWidget::mapToGlobal() to translate widget
+    coordinates to global screen coordinates.
+
+    \sa pos(), QWidget::mapFromGlobal(), QWidget::mapToGlobal()
+*/
+
+/*!
+    \fn void QCursor::setPos (const QPoint &p)
+
+    \overload
+
+    Moves the cursor (hot spot) to the global screen position at point
+    \a p.
+*/
+
+/*****************************************************************************
+  QCursor stream functions
+ *****************************************************************************/
+
+#ifndef QT_NO_DATASTREAM
+
+
+/*!
+    \fn QDataStream &operator<<(QDataStream &stream, const QCursor &cursor)
+    \relates QCursor
+
+    Writes the \a cursor to the \a stream.
+
+    \sa {Serializing Qt Data Types}
+*/
+
+QDataStream &operator<<(QDataStream &s, const QCursor &c)
+{
+    s << (qint16)c.shape();                        // write shape id to stream
+    if (c.shape() == Qt::BitmapCursor) {                // bitmap cursor
+        bool isPixmap = false;
+        if (s.version() >= 7) {
+            isPixmap = !c.pixmap().isNull();
+            s << isPixmap;
+        }
+        if (isPixmap)
+            s << c.pixmap();
+        else
+            s << *c.bitmap() << *c.mask();
+        s << c.hotSpot();
+    }
+    return s;
+}
+
+/*!
+    \fn QDataStream &operator>>(QDataStream &stream, QCursor &cursor)
+    \relates QCursor
+
+    Reads the \a cursor from the \a stream.
+
+    \sa {Serializing Qt Data Types}
+*/
+
+QDataStream &operator>>(QDataStream &s, QCursor &c)
+{
+    qint16 shape;
+    s >> shape;                                        // read shape id from stream
+    if (shape == Qt::BitmapCursor) {                // read bitmap cursor
+        bool isPixmap = false;
+        if (s.version() >= 7)
+            s >> isPixmap;
+        if (isPixmap) {
+            QPixmap pm;
+            QPoint hot;
+            s >> pm >> hot;
+            c = QCursor(pm, hot.x(), hot.y());
+        } else {
+            QBitmap bm, bmm;
+            QPoint hot;
+            s >> bm >> bmm >> hot;
+            c = QCursor(bm, bmm, hot.x(), hot.y());
+        }
+    } else {
+        c.setShape((Qt::CursorShape)shape);                // create cursor with shape
+    }
+    return s;
+}
+#endif // QT_NO_DATASTREAM
+
+
+/*!
+    Constructs a custom pixmap cursor.
+
+    \a pixmap is the image. It is usual to give it a mask (set using
+    QPixmap::setMask()). \a hotX and \a hotY define the cursor's hot
+    spot.
+
+    If \a hotX is negative, it is set to the \c{pixmap().width()/2}.
+    If \a hotY is negative, it is set to the \c{pixmap().height()/2}.
+
+    Valid cursor sizes depend on the display hardware (or the
+    underlying window system). We recommend using 32 x 32 cursors,
+    because this size is supported on all platforms. Some platforms
+    also support 16 x 16, 48 x 48, and 64 x 64 cursors.
+
+    \note On Windows CE, the cursor size is fixed. If the pixmap
+    is bigger than the system size, it will be scaled.
+
+    \sa QPixmap::QPixmap(), QPixmap::setMask()
+*/
+
+QCursor::QCursor(const QPixmap &pixmap, int hotX, int hotY)
+    : d(0)
+{
+    QImage img = pixmap.toImage().convertToFormat(QImage::Format_Indexed8, Qt::ThresholdDither|Qt::AvoidDither);
+    QBitmap bm = QBitmap::fromImage(img, Qt::ThresholdDither|Qt::AvoidDither);
+    QBitmap bmm = pixmap.mask();
+    if (!bmm.isNull()) {
+        QBitmap nullBm;
+        bm.setMask(nullBm);
+    }
+    else if (!pixmap.mask().isNull()) {
+        QImage mimg = pixmap.mask().toImage().convertToFormat(QImage::Format_Indexed8, Qt::ThresholdDither|Qt::AvoidDither);
+        bmm = QBitmap::fromImage(mimg, Qt::ThresholdDither|Qt::AvoidDither);
+    }
+    else {
+        bmm = QBitmap(bm.size());
+        bmm.fill(Qt::color1);
+    }
+
+    d = QCursorData::setBitmap(bm, bmm, hotX, hotY);
+    d->pixmap = pixmap;
+}
+
+
+
+/*!
+    Constructs a custom bitmap cursor.
+
+    \a bitmap and
+    \a mask make up the bitmap.
+    \a hotX and
+    \a hotY define the cursor's hot spot.
+
+    If \a hotX is negative, it is set to the \c{bitmap().width()/2}.
+    If \a hotY is negative, it is set to the \c{bitmap().height()/2}.
+
+    The cursor \a bitmap (B) and \a mask (M) bits are combined like this:
+    \list
+    \o B=1 and M=1 gives black.
+    \o B=0 and M=1 gives white.
+    \o B=0 and M=0 gives transparent.
+    \o B=1 and M=0 gives an XOR'd result under Windows, undefined
+    results on all other platforms.
+    \endlist
+
+    Use the global Qt color Qt::color0 to draw 0-pixels and Qt::color1 to
+    draw 1-pixels in the bitmaps.
+
+    Valid cursor sizes depend on the display hardware (or the
+    underlying window system). We recommend using 32 x 32 cursors,
+    because this size is supported on all platforms. Some platforms
+    also support 16 x 16, 48 x 48, and 64 x 64 cursors.
+
+    \note On Windows CE, the cursor size is fixed. If the pixmap
+    is bigger than the system size, it will be scaled.
+
+    \sa QBitmap::QBitmap(), QBitmap::setMask()
+*/
+
+QCursor::QCursor(const QBitmap &bitmap, const QBitmap &mask, int hotX, int hotY)
+    : d(0)
+{
+    d = QCursorData::setBitmap(bitmap, mask, hotX, hotY);
+}
+
+QCursorData *qt_cursorTable[Qt::LastCursor + 1];
+bool QCursorData::initialized = false;
+
+/*! \internal */
+void QCursorData::cleanup()
+{
+    if(!QCursorData::initialized)
+        return;
+
+    for (int shape = 0; shape <= Qt::LastCursor; ++shape) {
+        // In case someone has a static QCursor defined with this shape
+        if (!qt_cursorTable[shape]->ref.deref())
+            delete qt_cursorTable[shape];
+        qt_cursorTable[shape] = 0;
+    }
+    QCursorData::initialized = false;
+}
+
+/*! \internal */
+void QCursorData::initialize()
+{
+    if (QCursorData::initialized)
+        return;
+#ifdef Q_WS_MAC
+    // DRSWAT - Not Needed Cocoa or Carbon
+	//InitCursor();
+#endif
+    for (int shape = 0; shape <= Qt::LastCursor; ++shape)
+        qt_cursorTable[shape] = new QCursorData((Qt::CursorShape)shape);
+    QCursorData::initialized = true;
+}
+
+/*!
+    Constructs a cursor with the default arrow shape.
+*/
+QCursor::QCursor()
+{
+    if (!QCursorData::initialized) {
+        if (QApplication::startingUp()) {
+            d = 0;
+            return;
+        }
+        QCursorData::initialize();
+    }
+    QCursorData *c = qt_cursorTable[0];
+    c->ref.ref();
+    d = c;
+}
+
+/*!
+    Constructs a cursor with the specified \a shape.
+
+    See \l Qt::CursorShape for a list of shapes.
+
+    \sa setShape()
+*/
+QCursor::QCursor(Qt::CursorShape shape)
+    : d(0)
+{
+    if (!QCursorData::initialized)
+        QCursorData::initialize();
+    setShape(shape);
+}
+
+
+/*!
+    Returns the cursor shape identifier. The return value is one of
+    the \l Qt::CursorShape enum values (cast to an int).
+
+    \sa setShape()
+*/
+Qt::CursorShape QCursor::shape() const
+{
+    if (!QCursorData::initialized)
+        QCursorData::initialize();
+    return d->cshape;
+}
+
+/*!
+    Sets the cursor to the shape identified by \a shape.
+
+    See \l Qt::CursorShape for the list of cursor shapes.
+
+    \sa shape()
+*/
+void QCursor::setShape(Qt::CursorShape shape)
+{
+    if (!QCursorData::initialized)
+        QCursorData::initialize();
+    QCursorData *c = uint(shape) <= Qt::LastCursor ? qt_cursorTable[shape] : 0;
+    if (!c)
+        c = qt_cursorTable[0];
+    c->ref.ref();
+    if (!d) {
+        d = c;
+    } else {
+        if (!d->ref.deref())
+            delete d;
+        d = c;
+    }
+}
+
+/*!
+    Returns the cursor bitmap, or 0 if it is one of the standard
+    cursors.
+*/
+const QBitmap *QCursor::bitmap() const
+{
+    if (!QCursorData::initialized)
+        QCursorData::initialize();
+    return d->bm;
+}
+
+/*!
+    Returns the cursor bitmap mask, or 0 if it is one of the standard
+    cursors.
+*/
+
+const QBitmap *QCursor::mask() const
+{
+    if (!QCursorData::initialized)
+        QCursorData::initialize();
+    return d->bmm;
+}
+
+/*!
+    Returns the cursor pixmap. This is only valid if the cursor is a
+    pixmap cursor.
+*/
+
+QPixmap QCursor::pixmap() const
+{
+    if (!QCursorData::initialized)
+        QCursorData::initialize();
+    return d->pixmap;
+}
+
+/*!
+    Returns the cursor hot spot, or (0, 0) if it is one of the
+    standard cursors.
+*/
+
+QPoint QCursor::hotSpot() const
+{
+    if (!QCursorData::initialized)
+        QCursorData::initialize();
+    return QPoint(d->hx, d->hy);
+}
+
+/*!
+    Constructs a copy of the cursor \a c.
+*/
+
+QCursor::QCursor(const QCursor &c)
+{
+    if (!QCursorData::initialized)
+        QCursorData::initialize();
+    d = c.d;
+    d->ref.ref();
+}
+
+/*!
+    Destroys the cursor.
+*/
+
+QCursor::~QCursor()
+{
+    if (d && !d->ref.deref())
+        delete d;
+}
+
+
+/*!
+    Assigns \a c to this cursor and returns a reference to this
+    cursor.
+*/
+
+QCursor &QCursor::operator=(const QCursor &c)
+{
+    if (!QCursorData::initialized)
+        QCursorData::initialize();
+    if (c.d)
+        c.d->ref.ref();
+    if (d && !d->ref.deref())
+        delete d;
+    d = c.d;
+    return *this;
+}
+
+/*!
+   Returns the cursor as a QVariant.
+*/
+QCursor::operator QVariant() const
+{
+    return QVariant(QVariant::Cursor, this);
+}
+QT_END_NAMESPACE
+#endif // QT_NO_CURSOR
+