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#include "qicon.h"
#include "qicon_p.h"
#include "qiconengine.h"
#include "qiconengineplugin.h"
#include "private/qfactoryloader_p.h"
#include "private/qiconloader_p.h"
#include "qapplication.h"
#include "qstyleoption.h"
#include "qpainter.h"
#include "qfileinfo.h"
#include "qstyle.h"
#include "qpixmapcache.h"
#include "qvariant.h"
#include "qcache.h"
#include "qdebug.h"
#include "private/qguiplatformplugin_p.h"
#ifdef Q_WS_MAC
#include <private/qt_mac_p.h>
#include <private/qt_cocoa_helpers_mac_p.h>
#endif
#ifdef Q_WS_X11
#include "private/qt_x11_p.h"
#include "private/qkde_p.h"
#endif
#ifndef QT_NO_ICON
QT_BEGIN_NAMESPACE
/*!
\enum QIcon::Mode
This enum type describes the mode for which a pixmap is intended
to be used. The currently defined modes are:
\value Normal
Display the pixmap when the user is
not interacting with the icon, but the
functionality represented by the icon is available.
\value Disabled
Display the pixmap when the
functionality represented by the icon is not available.
\value Active
Display the pixmap when the
functionality represented by the icon is available and
the user is interacting with the icon, for example, moving the
mouse over it or clicking it.
\value Selected
Display the pixmap when the item represented by the icon is
selected.
*/
/*!
\enum QIcon::State
This enum describes the state for which a pixmap is intended to be
used. The \e state can be:
\value Off Display the pixmap when the widget is in an "off" state
\value On Display the pixmap when the widget is in an "on" state
*/
static QBasicAtomicInt serialNumCounter = Q_BASIC_ATOMIC_INITIALIZER(1);
static void qt_cleanup_icon_cache();
typedef QCache<QString, QIcon> IconCache;
Q_GLOBAL_STATIC_WITH_INITIALIZER(IconCache, qtIconCache, qAddPostRoutine(qt_cleanup_icon_cache))
static void qt_cleanup_icon_cache()
{
qtIconCache()->clear();
}
QIconPrivate::QIconPrivate()
: engine(0), ref(1),
serialNum(serialNumCounter.fetchAndAddRelaxed(1)),
detach_no(0),
engine_version(2),
v1RefCount(0)
{
}
QPixmapIconEngine::QPixmapIconEngine()
{
}
QPixmapIconEngine::QPixmapIconEngine(const QPixmapIconEngine &other)
: QIconEngineV2(other), pixmaps(other.pixmaps)
{
}
QPixmapIconEngine::~QPixmapIconEngine()
{
}
void QPixmapIconEngine::paint(QPainter *painter, const QRect &rect, QIcon::Mode mode, QIcon::State state)
{
QSize pixmapSize = rect.size();
#if defined(Q_WS_MAC)
pixmapSize *= qt_mac_get_scalefactor();
#endif
painter->drawPixmap(rect, pixmap(pixmapSize, mode, state));
}
static inline int area(const QSize &s) { return s.width() * s.height(); }
// returns the smallest of the two that is still larger than or equal to size.
static QPixmapIconEngineEntry *bestSizeMatch( const QSize &size, QPixmapIconEngineEntry *pa, QPixmapIconEngineEntry *pb)
{
int s = area(size);
if (pa->size == QSize() && pa->pixmap.isNull()) {
pa->pixmap = QPixmap(pa->fileName);
pa->size = pa->pixmap.size();
}
int a = area(pa->size);
if (pb->size == QSize() && pb->pixmap.isNull()) {
pb->pixmap = QPixmap(pb->fileName);
pb->size = pb->pixmap.size();
}
int b = area(pb->size);
int res = a;
if (qMin(a,b) >= s)
res = qMin(a,b);
else
res = qMax(a,b);
if (res == a)
return pa;
return pb;
}
QPixmapIconEngineEntry *QPixmapIconEngine::tryMatch(const QSize &size, QIcon::Mode mode, QIcon::State state)
{
QPixmapIconEngineEntry *pe = 0;
for (int i = 0; i < pixmaps.count(); ++i)
if (pixmaps.at(i).mode == mode && pixmaps.at(i).state == state) {
if (pe)
pe = bestSizeMatch(size, &pixmaps[i], pe);
else
pe = &pixmaps[i];
}
return pe;
}
QPixmapIconEngineEntry *QPixmapIconEngine::bestMatch(const QSize &size, QIcon::Mode mode, QIcon::State state, bool sizeOnly)
{
QPixmapIconEngineEntry *pe = tryMatch(size, mode, state);
while (!pe){
QIcon::State oppositeState = (state == QIcon::On) ? QIcon::Off : QIcon::On;
if (mode == QIcon::Disabled || mode == QIcon::Selected) {
QIcon::Mode oppositeMode = (mode == QIcon::Disabled) ? QIcon::Selected : QIcon::Disabled;
if ((pe = tryMatch(size, QIcon::Normal, state)))
break;
if ((pe = tryMatch(size, QIcon::Active, state)))
break;
if ((pe = tryMatch(size, mode, oppositeState)))
break;
if ((pe = tryMatch(size, QIcon::Normal, oppositeState)))
break;
if ((pe = tryMatch(size, QIcon::Active, oppositeState)))
break;
if ((pe = tryMatch(size, oppositeMode, state)))
break;
if ((pe = tryMatch(size, oppositeMode, oppositeState)))
break;
} else {
QIcon::Mode oppositeMode = (mode == QIcon::Normal) ? QIcon::Active : QIcon::Normal;
if ((pe = tryMatch(size, oppositeMode, state)))
break;
if ((pe = tryMatch(size, mode, oppositeState)))
break;
if ((pe = tryMatch(size, oppositeMode, oppositeState)))
break;
if ((pe = tryMatch(size, QIcon::Disabled, state)))
break;
if ((pe = tryMatch(size, QIcon::Selected, state)))
break;
if ((pe = tryMatch(size, QIcon::Disabled, oppositeState)))
break;
if ((pe = tryMatch(size, QIcon::Selected, oppositeState)))
break;
}
if (!pe)
return pe;
}
if (sizeOnly ? (pe->size.isNull() || !pe->size.isValid()) : pe->pixmap.isNull()) {
pe->pixmap = QPixmap(pe->fileName);
if (!pe->pixmap.isNull())
pe->size = pe->pixmap.size();
}
return pe;
}
QPixmap QPixmapIconEngine::pixmap(const QSize &size, QIcon::Mode mode, QIcon::State state)
{
QPixmap pm;
QPixmapIconEngineEntry *pe = bestMatch(size, mode, state, false);
if (pe)
pm = pe->pixmap;
if (pm.isNull()) {
int idx = pixmaps.count();
while (--idx >= 0) {
if (pe == &pixmaps[idx]) {
pixmaps.remove(idx);
break;
}
}
if (pixmaps.isEmpty())
return pm;
else
return pixmap(size, mode, state);
}
QSize actualSize = pm.size();
if (!actualSize.isNull() && (actualSize.width() > size.width() || actualSize.height() > size.height()))
actualSize.scale(size, Qt::KeepAspectRatio);
QString key = QLatin1String("$qt_icon_")
+ QString::number(pm.cacheKey())
+ QString::number(pe->mode)
+ QString::number(QApplication::palette().cacheKey())
+ QLatin1Char('_')
+ QString::number(actualSize.width())
+ QLatin1Char('_')
+ QString::number(actualSize.height())
+ QLatin1Char('_');
if (mode == QIcon::Active) {
if (QPixmapCache::find(key + QString::number(mode), pm))
return pm; // horray
if (QPixmapCache::find(key + QString::number(QIcon::Normal), pm)) {
QStyleOption opt(0);
opt.palette = QApplication::palette();
QPixmap active = QApplication::style()->generatedIconPixmap(QIcon::Active, pm, &opt);
if (pm.cacheKey() == active.cacheKey())
return pm;
}
}
if (!QPixmapCache::find(key + QString::number(mode), pm)) {
if (pm.size() != actualSize)
pm = pm.scaled(actualSize, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
if (pe->mode != mode && mode != QIcon::Normal) {
QStyleOption opt(0);
opt.palette = QApplication::palette();
QPixmap generated = QApplication::style()->generatedIconPixmap(mode, pm, &opt);
if (!generated.isNull())
pm = generated;
}
QPixmapCache::insert(key + QString::number(mode), pm);
}
return pm;
}
QSize QPixmapIconEngine::actualSize(const QSize &size, QIcon::Mode mode, QIcon::State state)
{
QSize actualSize;
if (QPixmapIconEngineEntry *pe = bestMatch(size, mode, state, true))
actualSize = pe->size;
if (actualSize.isNull())
return actualSize;
if (!actualSize.isNull() && (actualSize.width() > size.width() || actualSize.height() > size.height()))
actualSize.scale(size, Qt::KeepAspectRatio);
return actualSize;
}
void QPixmapIconEngine::addPixmap(const QPixmap &pixmap, QIcon::Mode mode, QIcon::State state)
{
if (!pixmap.isNull()) {
QPixmapIconEngineEntry *pe = tryMatch(pixmap.size(), mode, state);
if(pe && pe->size == pixmap.size()) {
pe->pixmap = pixmap;
pe->fileName.clear();
} else {
pixmaps += QPixmapIconEngineEntry(pixmap, mode, state);
}
}
}
void QPixmapIconEngine::addFile(const QString &fileName, const QSize &_size, QIcon::Mode mode, QIcon::State state)
{
if (!fileName.isEmpty()) {
QSize size = _size;
QPixmap pixmap;
QString abs = fileName;
if (fileName.at(0) != QLatin1Char(':'))
abs = QFileInfo(fileName).absoluteFilePath();
for (int i = 0; i < pixmaps.count(); ++i) {
if (pixmaps.at(i).mode == mode && pixmaps.at(i).state == state) {
QPixmapIconEngineEntry *pe = &pixmaps[i];
if(size == QSize()) {
pixmap = QPixmap(abs);
size = pixmap.size();
}
if (pe->size == QSize() && pe->pixmap.isNull()) {
pe->pixmap = QPixmap(pe->fileName);
pe->size = pe->pixmap.size();
}
if(pe->size == size) {
pe->pixmap = pixmap;
pe->fileName = abs;
return;
}
}
}
QPixmapIconEngineEntry e(abs, size, mode, state);
e.pixmap = pixmap;
pixmaps += e;
}
}
QString QPixmapIconEngine::key() const
{
return QLatin1String("QPixmapIconEngine");
}
QIconEngineV2 *QPixmapIconEngine::clone() const
{
return new QPixmapIconEngine(*this);
}
bool QPixmapIconEngine::read(QDataStream &in)
{
int num_entries;
QPixmap pm;
QString fileName;
QSize sz;
uint mode;
uint state;
in >> num_entries;
for (int i=0; i < num_entries; ++i) {
if (in.atEnd()) {
pixmaps.clear();
return false;
}
in >> pm;
in >> fileName;
in >> sz;
in >> mode;
in >> state;
if (pm.isNull()) {
addFile(fileName, sz, QIcon::Mode(mode), QIcon::State(state));
} else {
QPixmapIconEngineEntry pe(fileName, sz, QIcon::Mode(mode), QIcon::State(state));
pe.pixmap = pm;
pixmaps += pe;
}
}
return true;
}
bool QPixmapIconEngine::write(QDataStream &out) const
{
int num_entries = pixmaps.size();
out << num_entries;
for (int i=0; i < num_entries; ++i) {
if (pixmaps.at(i).pixmap.isNull())
out << QPixmap(pixmaps.at(i).fileName);
else
out << pixmaps.at(i).pixmap;
out << pixmaps.at(i).fileName;
out << pixmaps.at(i).size;
out << (uint) pixmaps.at(i).mode;
out << (uint) pixmaps.at(i).state;
}
return true;
}
void QPixmapIconEngine::virtual_hook(int id, void *data)
{
switch (id) {
case QIconEngineV2::AvailableSizesHook: {
QIconEngineV2::AvailableSizesArgument &arg =
*reinterpret_cast<QIconEngineV2::AvailableSizesArgument*>(data);
arg.sizes.clear();
for (int i = 0; i < pixmaps.size(); ++i) {
QPixmapIconEngineEntry &pe = pixmaps[i];
if (pe.size == QSize() && pe.pixmap.isNull()) {
pe.pixmap = QPixmap(pe.fileName);
pe.size = pe.pixmap.size();
}
if (pe.mode == arg.mode && pe.state == arg.state && !pe.size.isEmpty())
arg.sizes.push_back(pe.size);
}
break;
}
default:
QIconEngineV2::virtual_hook(id, data);
}
}
#if !defined (QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS)
Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, loader,
(QIconEngineFactoryInterface_iid, QLatin1String("/iconengines"), Qt::CaseInsensitive))
Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, loaderV2,
(QIconEngineFactoryInterfaceV2_iid, QLatin1String("/iconengines"), Qt::CaseInsensitive))
#endif
/*!
\class QIcon
\brief The QIcon class provides scalable icons in different modes
and states.
\ingroup painting
\ingroup shared
A QIcon can generate smaller, larger, active, and disabled pixmaps
from the set of pixmaps it is given. Such pixmaps are used by Qt
widgets to show an icon representing a particular action.
The simplest use of QIcon is to create one from a QPixmap file or
resource, and then use it, allowing Qt to work out all the required
icon styles and sizes. For example:
\snippet doc/src/snippets/code/src_gui_image_qicon.cpp 0
To undo a QIcon, simply set a null icon in its place:
\snippet doc/src/snippets/code/src_gui_image_qicon.cpp 1
Use the QImageReader::supportedImageFormats() and
QImageWriter::supportedImageFormats() functions to retrieve a
complete list of the supported file formats.
When you retrieve a pixmap using pixmap(QSize, Mode, State), and no
pixmap for this given size, mode and state has been added with
addFile() or addPixmap(), then QIcon will generate one on the
fly. This pixmap generation happens in a QIconEngineV2. The default
engine scales pixmaps down if required, but never up, and it uses
the current style to calculate a disabled appearance. By using
custom icon engines, you can customize every aspect of generated
icons. With QIconEnginePluginV2 it is possible to register different
icon engines for different file suffixes, making it possible for
third parties to provide additional icon engines to those included
with Qt.
\note Since Qt 4.2, an icon engine that supports SVG is included.
\section1 Making Classes that Use QIcon
If you write your own widgets that have an option to set a small
pixmap, consider allowing a QIcon to be set for that pixmap. The
Qt class QToolButton is an example of such a widget.
Provide a method to set a QIcon, and when you draw the icon, choose
whichever pixmap is appropriate for the current state of your widget.
For example:
\snippet doc/src/snippets/code/src_gui_image_qicon.cpp 2
You might also make use of the \c Active mode, perhaps making your
widget \c Active when the mouse is over the widget (see \l
QWidget::enterEvent()), while the mouse is pressed pending the
release that will activate the function, or when it is the currently
selected item. If the widget can be toggled, the "On" mode might be
used to draw a different icon.
\img icon.png QIcon
\sa {fowler}{GUI Design Handbook: Iconic Label}, {Icons Example}
*/
/*!
Constructs a null icon.
*/
QIcon::QIcon()
: d(0)
{
}
/*!
Constructs an icon from a \a pixmap.
*/
QIcon::QIcon(const QPixmap &pixmap)
:d(0)
{
addPixmap(pixmap);
}
/*!
Constructs a copy of \a other. This is very fast.
*/
QIcon::QIcon(const QIcon &other)
:d(other.d)
{
if (d)
d->ref.ref();
}
/*!
Constructs an icon from the file with the given \a fileName. The
file will be loaded on demand.
If \a fileName contains a relative path (e.g. the filename only)
the relevant file must be found relative to the runtime working
directory.
The file name can be either refer to an actual file on disk or to
one of the application's embedded resources. See the
\l{resources.html}{Resource System} overview for details on how to
embed images and other resource files in the application's
executable.
Use the QImageReader::supportedImageFormats() and
QImageWriter::supportedImageFormats() functions to retrieve a
complete list of the supported file formats.
*/
QIcon::QIcon(const QString &fileName)
: d(0)
{
addFile(fileName);
}
/*!
Creates an icon with a specific icon \a engine. The icon takes
ownership of the engine.
*/
QIcon::QIcon(QIconEngine *engine)
:d(new QIconPrivate)
{
d->engine_version = 1;
d->engine = engine;
d->v1RefCount = new QAtomicInt(1);
}
/*!
Creates an icon with a specific icon \a engine. The icon takes
ownership of the engine.
*/
QIcon::QIcon(QIconEngineV2 *engine)
:d(new QIconPrivate)
{
d->engine_version = 2;
d->engine = engine;
}
/*!
Destroys the icon.
*/
QIcon::~QIcon()
{
if (d && !d->ref.deref())
delete d;
}
/*!
Assigns the \a other icon to this icon and returns a reference to
this icon.
*/
QIcon &QIcon::operator=(const QIcon &other)
{
if (other.d)
other.d->ref.ref();
if (d && !d->ref.deref())
delete d;
d = other.d;
return *this;
}
/*!
Returns the icon as a QVariant.
*/
QIcon::operator QVariant() const
{
return QVariant(QVariant::Icon, this);
}
/*! \obsolete
Returns a number that identifies the contents of this
QIcon object. Distinct QIcon objects can have
the same serial number if they refer to the same contents
(but they don't have to). Also, the serial number of
a QIcon object may change during its lifetime.
Use cacheKey() instead.
A null icon always has a serial number of 0.
Serial numbers are mostly useful in conjunction with caching.
\sa QPixmap::serialNumber()
*/
int QIcon::serialNumber() const
{
return d ? d->serialNum : 0;
}
/*!
Returns a number that identifies the contents of this QIcon
object. Distinct QIcon objects can have the same key if
they refer to the same contents.
\since 4.3
The cacheKey() will change when the icon is altered via
addPixmap() or addFile().
Cache keys are mostly useful in conjunction with caching.
\sa QPixmap::cacheKey()
*/
qint64 QIcon::cacheKey() const
{
if (!d)
return 0;
return (((qint64) d->serialNum) << 32) | ((qint64) (d->detach_no));
}
/*!
Returns a pixmap with the requested \a size, \a mode, and \a
state, generating one if necessary. The pixmap might be smaller than
requested, but never larger.
\sa actualSize(), paint()
*/
QPixmap QIcon::pixmap(const QSize &size, Mode mode, State state) const
{
if (!d)
return QPixmap();
return d->engine->pixmap(size, mode, state);
}
/*!
\fn QPixmap QIcon::pixmap(int w, int h, Mode mode = Normal, State state = Off) const
\overload
Returns a pixmap of size QSize(\a w, \a h). The pixmap might be smaller than
requested, but never larger.
*/
/*!
\fn QPixmap QIcon::pixmap(int extent, Mode mode = Normal, State state = Off) const
\overload
Returns a pixmap of size QSize(\a extent, \a extent). The pixmap might be smaller
than requested, but never larger.
*/
/*! Returns the actual size of the icon for the requested \a size, \a
mode, and \a state. The result might be smaller than requested, but
never larger.
\sa pixmap(), paint()
*/
QSize QIcon::actualSize(const QSize &size, Mode mode, State state) const
{
if (!d)
return QSize();
return d->engine->actualSize(size, mode, state);
}
/*!
Uses the \a painter to paint the icon with specified \a alignment,
required \a mode, and \a state into the rectangle \a rect.
\sa actualSize(), pixmap()
*/
void QIcon::paint(QPainter *painter, const QRect &rect, Qt::Alignment alignment, Mode mode, State state) const
{
if (!d || !painter)
return;
QRect alignedRect = QStyle::alignedRect(painter->layoutDirection(), alignment, d->engine->actualSize(rect.size(), mode, state), rect);
d->engine->paint(painter, alignedRect, mode, state);
}
/*!
\fn void QIcon::paint(QPainter *painter, int x, int y, int w, int h, Qt::Alignment alignment,
Mode mode, State state) const
\overload
Paints the icon into the rectangle QRect(\a x, \a y, \a w, \a h).
*/
/*!
Returns true if the icon is empty; otherwise returns false.
An icon is empty if it has neither a pixmap nor a filename.
Note: Even a non-null icon might not be able to create valid
pixmaps, eg. if the file does not exist or cannot be read.
*/
bool QIcon::isNull() const
{
return !d;
}
/*!\internal
*/
bool QIcon::isDetached() const
{
return !d || d->ref == 1;
}
/*! \internal
*/
void QIcon::detach()
{
if (d) {
if (d->ref != 1) {
QIconPrivate *x = new QIconPrivate;
if (d->engine_version > 1) {
QIconEngineV2 *engine = static_cast<QIconEngineV2 *>(d->engine);
x->engine = engine->clone();
} else {
x->engine = d->engine;
x->v1RefCount = d->v1RefCount;
x->v1RefCount->ref();
}
x->engine_version = d->engine_version;
if (!d->ref.deref())
delete d;
d = x;
}
++d->detach_no;
}
}
/*!
Adds \a pixmap to the icon, as a specialization for \a mode and
\a state.
Custom icon engines are free to ignore additionally added
pixmaps.
\sa addFile()
*/
void QIcon::addPixmap(const QPixmap &pixmap, Mode mode, State state)
{
if (pixmap.isNull())
return;
if (!d) {
d = new QIconPrivate;
d->engine = new QPixmapIconEngine;
} else {
detach();
}
d->engine->addPixmap(pixmap, mode, state);
}
/*! Adds an image from the file with the given \a fileName to the
icon, as a specialization for \a size, \a mode and \a state. The
file will be loaded on demand. Note: custom icon engines are free
to ignore additionally added pixmaps.
If \a fileName contains a relative path (e.g. the filename only)
the relevant file must be found relative to the runtime working
directory.
The file name can be either refer to an actual file on disk or to
one of the application's embedded resources. See the
\l{resources.html}{Resource System} overview for details on how to
embed images and other resource files in the application's
executable.
Use the QImageReader::supportedImageFormats() and
QImageWriter::supportedImageFormats() functions to retrieve a
complete list of the supported file formats.
Note: When you add a non-empty filename to a QIcon, the icon becomes
non-null, even if the file doesn't exist or points to a corrupt file.
\sa addPixmap()
*/
void QIcon::addFile(const QString &fileName, const QSize &size, Mode mode, State state)
{
if (fileName.isEmpty())
return;
if (!d) {
#if !defined (QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS)
QFileInfo info(fileName);
QString suffix = info.suffix();
if (!suffix.isEmpty()) {
// first try version 2 engines..
if (QIconEngineFactoryInterfaceV2 *factory = qobject_cast<QIconEngineFactoryInterfaceV2*>(loaderV2()->instance(suffix))) {
if (QIconEngine *engine = factory->create(fileName)) {
d = new QIconPrivate;
d->engine = engine;
}
}
// ..then fall back and try to load version 1 engines
if (!d) {
if (QIconEngineFactoryInterface *factory = qobject_cast<QIconEngineFactoryInterface*>(loader()->instance(suffix))) {
if (QIconEngine *engine = factory->create(fileName)) {
d = new QIconPrivate;
d->engine = engine;
d->engine_version = 1;
d->v1RefCount = new QAtomicInt(1);
}
}
}
}
#endif
// ...then fall back to the default engine
if (!d) {
d = new QIconPrivate;
d->engine = new QPixmapIconEngine;
}
} else {
detach();
}
d->engine->addFile(fileName, size, mode, state);
}
/*!
\since 4.5
Returns a list of available icon sizes for the specified \a mode and
\a state.
*/
QList<QSize> QIcon::availableSizes(Mode mode, State state) const
{
if (!d || !d->engine || d->engine_version < 2)
return QList<QSize>();
QIconEngineV2 *engine = static_cast<QIconEngineV2*>(d->engine);
return engine->availableSizes(mode, state);
}
/*!
\since 4.6
Sets the search paths for icon themes to \a paths.
\sa themeSearchPaths(), fromTheme(), setThemeName()
*/
void QIcon::setThemeSearchPaths(const QStringList &paths)
{
QIconLoader::instance()->setThemeSearchPath(paths);
}
/*!
\since 4.6
Returns the search paths for icon themes.
The default value will depend on the platform:
On X11, the search path will use the XDG_DATA_DIRS environment
variable if available.
By default all platforms will have the resource directory
\c{:\icons} as a fallback. You can use "rcc -project" to generate a
resource file from your icon theme.
\sa setThemeSearchPaths(), fromTheme(), setThemeName()
*/
QStringList QIcon::themeSearchPaths()
{
return QIconLoader::instance()->themeSearchPaths();
}
/*!
\since 4.6
Sets the current icon theme to \a name.
The \a name should correspond to a directory name in the
themeSearchPath() containing an index.theme
file describing it's contents.
\sa themeSearchPaths(), themeName()
*/
void QIcon::setThemeName(const QString &name)
{
QIconLoader::instance()->setThemeName(name);
}
/*!
\since 4.6
Returns the name of the current icon theme.
On X11, the current icon theme depends on your desktop
settings. On other platforms it is not set by default.
\sa setThemeName(), themeSearchPaths(), fromTheme(),
hasThemeIcon()
*/
QString QIcon::themeName()
{
return QIconLoader::instance()->themeName();
}
/*!
\since 4.6
Returns the QIcon corresponding to \a name in the current
icon theme. If no such icon is found in the current theme
\a fallback is return instead.
The lastest version of the freedesktop icon specification and naming
spesification can be obtained here:
http://standards.freedesktop.org/icon-theme-spec/icon-theme-spec-latest.html
http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html
To fetch an icon from the current icon theme:
\snippet doc/src/snippets/code/src_gui_image_qicon.cpp 3
Or if you want to provide a guaranteed fallback for platforms that
do not support theme icons, you can use the second argument:
\snippet doc/src/snippets/code/src_gui_image_qicon.cpp 4
\note By default, only X11 will support themed icons. In order to
use themed icons on Mac and Windows, you will have to bundle a
compliant theme in one of your themeSearchPaths() and set the
appropriate themeName().
\sa themeName(), setThemeName(), themeSearchPaths()
*/
QIcon QIcon::fromTheme(const QString &name, const QIcon &fallback)
{
QIcon icon;
if (qtIconCache()->contains(name)) {
icon = *qtIconCache()->object(name);
} else {
QIcon *cachedIcon = new QIcon(new QIconLoaderEngine(name));
qtIconCache()->insert(name, cachedIcon);
icon = *cachedIcon;
}
// Note the qapp check is to allow lazy loading of static icons
// Supporting fallbacks will not work for this case.
if (qApp && icon.availableSizes().isEmpty())
return fallback;
return icon;
}
/*!
\since 4.6
Returns true if there is an icon available for \a name in the
current icon theme, otherwise returns false.
\sa themeSearchPaths(), fromTheme(), setThemeName()
*/
bool QIcon::hasThemeIcon(const QString &name)
{
QIcon icon = fromTheme(name);
return !icon.isNull();
}
/*****************************************************************************
QIcon stream functions
*****************************************************************************/
#if !defined(QT_NO_DATASTREAM)
/*!
\fn QDataStream &operator<<(QDataStream &stream, const QIcon &icon)
\relates QIcon
\since 4.2
Writes the given \a icon to the given \a stream as a PNG
image. If the icon contains more than one image, all images will
be written to the stream. Note that writing the stream to a file
will not produce a valid image file.
*/
QDataStream &operator<<(QDataStream &s, const QIcon &icon)
{
if (s.version() >= QDataStream::Qt_4_3) {
if (icon.isNull()) {
s << QString();
} else {
if (icon.d->engine_version > 1) {
QIconEngineV2 *engine = static_cast<QIconEngineV2 *>(icon.d->engine);
s << engine->key();
engine->write(s);
} else {
// not really supported
qWarning("QIcon: Cannot stream QIconEngine. Use QIconEngineV2 instead.");
}
}
} else if (s.version() == QDataStream::Qt_4_2) {
if (icon.isNull()) {
s << 0;
} else {
QPixmapIconEngine *engine = static_cast<QPixmapIconEngine *>(icon.d->engine);
int num_entries = engine->pixmaps.size();
s << num_entries;
for (int i=0; i < num_entries; ++i) {
s << engine->pixmaps.at(i).pixmap;
s << engine->pixmaps.at(i).fileName;
s << engine->pixmaps.at(i).size;
s << (uint) engine->pixmaps.at(i).mode;
s << (uint) engine->pixmaps.at(i).state;
}
}
} else {
s << QPixmap(icon.pixmap(22,22));
}
return s;
}
/*!
\fn QDataStream &operator>>(QDataStream &stream, QIcon &icon)
\relates QIcon
\since 4.2
Reads an image, or a set of images, from the given \a stream into
the given \a icon.
*/
QDataStream &operator>>(QDataStream &s, QIcon &icon)
{
if (s.version() >= QDataStream::Qt_4_3) {
icon = QIcon();
QString key;
s >> key;
if (key == QLatin1String("QPixmapIconEngine")) {
icon.d = new QIconPrivate;
QIconEngineV2 *engine = new QPixmapIconEngine;
icon.d->engine = engine;
engine->read(s);
} else if (key == QLatin1String("QIconLoaderEngine")) {
icon.d = new QIconPrivate;
QIconEngineV2 *engine = new QIconLoaderEngine();
icon.d->engine = engine;
engine->read(s);
#if !defined (QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS)
} else if (QIconEngineFactoryInterfaceV2 *factory = qobject_cast<QIconEngineFactoryInterfaceV2*>(loaderV2()->instance(key))) {
if (QIconEngineV2 *engine= factory->create()) {
icon.d = new QIconPrivate;
icon.d->engine = engine;
engine->read(s);
}
#endif
}
} else if (s.version() == QDataStream::Qt_4_2) {
icon = QIcon();
int num_entries;
QPixmap pm;
QString fileName;
QSize sz;
uint mode;
uint state;
s >> num_entries;
for (int i=0; i < num_entries; ++i) {
s >> pm;
s >> fileName;
s >> sz;
s >> mode;
s >> state;
if (pm.isNull())
icon.addFile(fileName, sz, QIcon::Mode(mode), QIcon::State(state));
else
icon.addPixmap(pm, QIcon::Mode(mode), QIcon::State(state));
}
} else {
QPixmap pm;
s >> pm;
icon.addPixmap(pm);
}
return s;
}
#endif //QT_NO_DATASTREAM
#ifdef QT3_SUPPORT
static int widths[2] = { 22, 32 };
static int heights[2] = { 22, 32 };
static QSize pixmapSizeHelper(QIcon::Size which)
{
int i = 0;
if (which == QIcon::Large)
i = 1;
return QSize(widths[i], heights[i]);
}
/*!
\enum QIcon::Size
\compat
\value Small Use QStyle::pixelMetric(QStyle::PM_SmallIconSize) instead.
\value Large Use QStyle::pixelMetric(QStyle::PM_LargeIconSize) instead.
\value Automatic N/A.
*/
/*!
Use pixmap(QSize(...), \a mode, \a state), where the first
argument is an appropriate QSize instead of a \l Size value.
\sa pixmapSize()
*/
QPixmap QIcon::pixmap(Size size, Mode mode, State state) const
{ return pixmap(pixmapSizeHelper(size), mode, state); }
/*!
Use pixmap(QSize(...), mode, \a state), where the first argument
is an appropriate QSize instead of a \l Size value, and the
second argument is QIcon::Normal or QIcon::Disabled, depending on
the value of \a enabled.
\sa pixmapSize()
*/
QPixmap QIcon::pixmap(Size size, bool enabled, State state) const
{ return pixmap(pixmapSizeHelper(size), enabled ? Normal : Disabled, state); }
/*!
Use one of the other pixmap() overloads.
*/
QPixmap QIcon::pixmap() const
{ return pixmap(pixmapSizeHelper(Small), Normal, Off); }
/*!
The pixmap() function now takes a QSize instead of a QIcon::Size,
so there is no need for this function in new code.
*/
void QIcon::setPixmapSize(Size which, const QSize &size)
{
int i = 0;
if (which == Large)
i = 1;
widths[i] = size.width();
heights[i] = size.height();
}
/*!
Use QStyle::pixelMetric() with QStyle::PM_SmallIconSize or
QStyle::PM_LargeIconSize as the first argument, depending on \a
which.
*/
QSize QIcon::pixmapSize(Size which)
{
return pixmapSizeHelper(which);
}
/*!
\fn void QIcon::reset(const QPixmap &pixmap, Size size)
Use the constructor that takes a QPixmap and operator=().
*/
/*!
\fn void QIcon::setPixmap(const QPixmap &pixmap, Size size, Mode mode, State state)
Use addPixmap(\a pixmap, \a mode, \a state) instead. The \a size
parameter is ignored.
*/
/*!
\fn void QIcon::setPixmap(const QString &fileName, Size size, Mode mode, State state)
Use addFile(\a fileName, \a mode, \a state) instead. The \a size
parameter is ignored.
*/
#endif // QT3_SUPPORT
/*!
\fn DataPtr &QIcon::data_ptr()
\internal
*/
/*!
\typedef QIcon::DataPtr
\internal
*/
QT_END_NAMESPACE
#endif //QT_NO_ICON