diff options
Diffstat (limited to 'src/gui/image/qiconengine.cpp')
-rw-r--r-- | src/gui/image/qiconengine.cpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/gui/image/qiconengine.cpp b/src/gui/image/qiconengine.cpp index c09933d45f..7411dbb054 100644 --- a/src/gui/image/qiconengine.cpp +++ b/src/gui/image/qiconengine.cpp @@ -150,6 +150,11 @@ void QIconEngine::addFile(const QString &/*fileName*/, const QSize &/*size*/, QI icon, for example when instantiating an icon using QIcon::fromTheme(). + \value IsNullHook Allow to query if this engine represents a null + icon. The \a data argument of the virtual_hook() is a pointer to a + bool that can be set to true if the icon is null. This enum value + was added in Qt 5.7. + \sa virtual_hook() */ @@ -283,4 +288,16 @@ QString QIconEngine::iconName() const return name; } +/*! + \since 5.7 + + Returns true if this icon engine represent a null QIcon. + */ +bool QIconEngine::isNull() const +{ + bool isNull = false; + const_cast<QIconEngine *>(this)->virtual_hook(QIconEngine::IsNullHook, &isNull); + return isNull; +} + QT_END_NAMESPACE |