QString example = tr("Example");
//! [40]
+//! [41]
+QPushButton *button = parentWidget->findChild<QPushButton *>("button1", Qt::FindDirectChildOnly);
+//! [41]
+
+
+//! [42]
+QListWidget *list = parentWidget->findChild<QListWidget *>(QString(), Qt::FindDirectChildOnly);
+//! [42]
+
+
+//! [43]
+QList<QPushButton *> childButtons = parentWidget.findChildren<QPushButton *>(QString(), Qt::FindDirectChildOnly);
+//! [43]
+
+
//! [meta data]
//: This is a comment for the translator.
//= qtn_foo_bar
AnchorBottom
};
-
+ enum FindChildOption {
+ FindDirectChildrenOnly = 0x0,
+ FindChildrenRecursively = 0x1
+ };
+ Q_DECLARE_FLAGS(FindChildOptions, FindChildOption)
enum DropAction {
CopyAction = 0x1,
*/
/*!
+ \enum Qt::FindChildOption
+
+ \value FindDirectChildrenOnly Looks only at the direct children of the object.
+ \value FindChildrenRecursively Looks at all children of the object (recursive search).
+*/
+
+/*!
\enum Qt::DropAction
\value CopyAction Copy the data to the target.
\brief the name of this object
- You can find an object by name (and type) using findChild(). You can
- find a set of objects with findChildren().
+ You can find an object by name (and type) using findChild().
+ You can find a set of objects with findChildren().
\snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 5
/*!
- \fn T *QObject::findChild(const QString &name) const
+ \fn T *QObject::findChild(const QString &name, Qt::FindChildOptions options) const
Returns the child of this object that can be cast into type T and
that is called \a name, or 0 if there is no such object.
Omitting the \a name argument causes all object names to be matched.
- The search is performed recursively.
+ The search is performed recursively, unless \a options specifies the
+ option FindDirectChildrenOnly.
If there is more than one child matching the search, the most
direct ancestor is returned. If there are several direct
case, findChildren() should be used.
This example returns a child \l{QPushButton} of \c{parentWidget}
- named \c{"button1"}:
+ named \c{"button1"}, even if the button isn't a direct child of
+ the parent:
\snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 10
\snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 11
+ This example returns a child \l{QPushButton} of \c{parentWidget}
+ (its direct parent) named \c{"button1"}:
+
+ \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 41
+
+ This example returns a \l{QListWidget} child of \c{parentWidget},
+ its direct parent:
+
+ \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 42
+
\sa findChildren()
*/
/*!
- \fn QList<T> QObject::findChildren(const QString &name) const
+ \fn QList<T> QObject::findChildren(const QString &name, Qt::FindChildOptions options) const
Returns all children of this object with the given \a name that can be
cast to type T, or an empty list if there are no such objects.
Omitting the \a name argument causes all object names to be matched.
- The search is performed recursively.
+ The search is performed recursively, unless \a options specifies the
+ option FindDirectChildrenOnly.
The following example shows how to find a list of child \l{QWidget}s of
the specified \c{parentWidget} named \c{widgetname}:
\snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 13
+ This example returns all \c{QPushButton}s that are immediate children of \c{parentWidget}:
+
+ \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 43
+
\sa findChild()
*/
/*!
- \fn QList<T> QObject::findChildren(const QRegExp ®Exp) const
+ \fn QList<T> QObject::findChildren(const QRegExp ®Exp, Qt::FindChildOptions options) const
\overload findChildren()
Returns the children of this object that can be cast to type T
\internal
*/
void qt_qFindChildren_helper(const QObject *parent, const QString &name, const QRegExp *re,
- const QMetaObject &mo, QList<void*> *list)
+ const QMetaObject &mo, QList<void*> *list, Qt::FindChildOptions options)
{
if (!parent || !list)
return;
list->append(obj);
}
}
- qt_qFindChildren_helper(obj, name, re, mo, list);
+ if (options & Qt::FindChildrenRecursively)
+ qt_qFindChildren_helper(obj, name, re, mo, list, options);
}
}
/*! \internal
*/
-QObject *qt_qFindChild_helper(const QObject *parent, const QString &name, const QMetaObject &mo)
+QObject *qt_qFindChild_helper(const QObject *parent, const QString &name, const QMetaObject &mo, Qt::FindChildOptions options)
{
if (!parent)
return 0;
if (mo.cast(obj) && (name.isNull() || obj->objectName() == name))
return obj;
}
- for (i = 0; i < children.size(); ++i) {
- obj = qt_qFindChild_helper(children.at(i), name, mo);
- if (obj)
- return obj;
+ if (options & Qt::FindChildrenRecursively) {
+ for (i = 0; i < children.size(); ++i) {
+ obj = qt_qFindChild_helper(children.at(i), name, mo, options);
+ if (obj)
+ return obj;
+ }
}
return 0;
}
typedef QList<QObject*> QObjectList;
Q_CORE_EXPORT void qt_qFindChildren_helper(const QObject *parent, const QString &name, const QRegExp *re,
- const QMetaObject &mo, QList<void *> *list);
-Q_CORE_EXPORT QObject *qt_qFindChild_helper(const QObject *parent, const QString &name, const QMetaObject &mo);
+ const QMetaObject &mo, QList<void *> *list, Qt::FindChildOptions options);
+Q_CORE_EXPORT QObject *qt_qFindChild_helper(const QObject *parent, const QString &name, const QMetaObject &mo, Qt::FindChildOptions options);
class
#if defined(__INTEL_COMPILER) && defined(Q_OS_WIN)
void killTimer(int id);
template<typename T>
- inline T findChild(const QString &aName = QString()) const
- { return static_cast<T>(qt_qFindChild_helper(this, aName, reinterpret_cast<T>(0)->staticMetaObject)); }
+ inline T findChild(const QString &aName = QString(), Qt::FindChildOptions options = Qt::FindChildrenRecursively) const
+ { return static_cast<T>(qt_qFindChild_helper(this, aName, reinterpret_cast<T>(0)->staticMetaObject, options)); }
template<typename T>
- inline QList<T> findChildren(const QString &aName = QString()) const
+ inline QList<T> findChildren(const QString &aName = QString(), Qt::FindChildOptions options = Qt::FindChildrenRecursively) const
{
QList<T> list;
union {
QList<void *> *voidList;
} u;
u.typedList = &list;
- qt_qFindChildren_helper(this, aName, 0, reinterpret_cast<T>(0)->staticMetaObject, u.voidList);
+ qt_qFindChildren_helper(this, aName, 0, reinterpret_cast<T>(0)->staticMetaObject, u.voidList, options);
return list;
}
#ifndef QT_NO_REGEXP
template<typename T>
- inline QList<T> findChildren(const QRegExp &re) const
+ inline QList<T> findChildren(const QRegExp &re, Qt::FindChildOptions options = Qt::FindChildrenRecursively) const
{
QList<T> list;
union {
QList<void *> *voidList;
} u;
u.typedList = &list;
- qt_qFindChildren_helper(this, QString(), &re, reinterpret_cast<T>(0)->staticMetaObject, u.voidList);
+ qt_qFindChildren_helper(this, QString(), &re, reinterpret_cast<T>(0)->staticMetaObject, u.voidList, options);
return list;
}
#endif
tl = o.findChildren<QTimer *>("t1");
QCOMPARE(tl.size(), 1);
QCOMPARE(tl.at(0), &t1);
+
+ // Find direct child/children
+
+ op = o.findChild<QObject*>("o1", Qt::FindDirectChildrenOnly);
+ QCOMPARE(op, &o1);
+ op = o.findChild<QObject*>("o2", Qt::FindDirectChildrenOnly);
+ QCOMPARE(op, &o2);
+ op = o.findChild<QObject*>("o11", Qt::FindDirectChildrenOnly);
+ QCOMPARE(op, static_cast<QObject *>(0));
+ op = o.findChild<QObject*>("o12", Qt::FindDirectChildrenOnly);
+ QCOMPARE(op, static_cast<QObject *>(0));
+ op = o.findChild<QObject*>("o111", Qt::FindDirectChildrenOnly);
+ QCOMPARE(op, static_cast<QObject *>(0));
+ op = o.findChild<QObject*>("t1", Qt::FindDirectChildrenOnly);
+ QCOMPARE(op, static_cast<QObject *>(&t1));
+ op = o.findChild<QObject*>("t121", Qt::FindDirectChildrenOnly);
+ QCOMPARE(op, static_cast<QObject *>(0));
+ op = o.findChild<QTimer*>("t1", Qt::FindDirectChildrenOnly);
+ QCOMPARE(op, static_cast<QObject *>(&t1));
+ op = o.findChild<QTimer*>("t121", Qt::FindDirectChildrenOnly);
+ QCOMPARE(op, static_cast<QObject *>(0));
+ op = o.findChild<QTimer*>("o12", Qt::FindDirectChildrenOnly);
+ QCOMPARE(op, static_cast<QObject *>(0));
+ op = o.findChild<QObject*>("o", Qt::FindDirectChildrenOnly);
+ QCOMPARE(op, static_cast<QObject *>(0));
+ op = o.findChild<QObject*>("harry", Qt::FindDirectChildrenOnly);
+ QCOMPARE(op, static_cast<QObject *>(0));
+ op = o.findChild<QObject*>("o1", Qt::FindDirectChildrenOnly);
+ QCOMPARE(op, &o1);
+
+ l = o.findChildren<QObject*>("o1", Qt::FindDirectChildrenOnly);
+ QCOMPARE(l.size(), 1);
+ QCOMPARE(l.at(0), &o1);
+ l = o.findChildren<QObject*>("o2", Qt::FindDirectChildrenOnly);
+ QCOMPARE(l.size(), 1);
+ QCOMPARE(l.at(0), &o2);
+ l = o.findChildren<QObject*>("o11", Qt::FindDirectChildrenOnly);
+ QCOMPARE(l.size(), 0);
+ l = o.findChildren<QObject*>("o12", Qt::FindDirectChildrenOnly);
+ QCOMPARE(l.size(), 0);
+ l = o.findChildren<QObject*>("o111", Qt::FindDirectChildrenOnly);
+ QCOMPARE(l.size(), 0);
+ l = o.findChildren<QObject*>("t1", Qt::FindDirectChildrenOnly);
+ QCOMPARE(l.size(), 1);
+ QCOMPARE(l.at(0), static_cast<QObject *>(&t1));
+ l = o.findChildren<QObject*>("t121", Qt::FindDirectChildrenOnly);
+ QCOMPARE(l.size(), 0);
+ tl = o.findChildren<QTimer*>("t1", Qt::FindDirectChildrenOnly);
+ QCOMPARE(tl.size(), 1);
+ QCOMPARE(tl.at(0), &t1);
+ tl = o.findChildren<QTimer*>("t121", Qt::FindDirectChildrenOnly);
+ QCOMPARE(tl.size(), 0);
+ l = o.findChildren<QObject*>("o", Qt::FindDirectChildrenOnly);
+ QCOMPARE(l.size(), 0);
+ l = o.findChildren<QObject*>("harry", Qt::FindDirectChildrenOnly);
+ QCOMPARE(l.size(), 0);
+ tl = o.findChildren<QTimer*>("o12", Qt::FindDirectChildrenOnly);
+ QCOMPARE(tl.size(), 0);
+ l = o.findChildren<QObject*>("o1", Qt::FindDirectChildrenOnly);
+ QCOMPARE(l.size(), 1);
+ QCOMPARE(l.at(0), &o1);
+
+ l = o.findChildren<QObject*>(QRegExp("o.*"), Qt::FindDirectChildrenOnly);
+ QCOMPARE(l.size(), 2);
+ QVERIFY(l.contains(&o1));
+ QVERIFY(l.contains(&o2));
+ l = o.findChildren<QObject*>(QRegExp("t.*"), Qt::FindDirectChildrenOnly);
+ QCOMPARE(l.size(), 1);
+ QVERIFY(l.contains(&t1));
+ tl = o.findChildren<QTimer*>(QRegExp(".*"), Qt::FindDirectChildrenOnly);
+ QCOMPARE(tl.size(), 2);
+ QVERIFY(tl.contains(&t1));
+ tl = o.findChildren<QTimer*>(QRegExp("o.*"), Qt::FindDirectChildrenOnly);
+ QCOMPARE(tl.size(), 0);
+ l = o.findChildren<QObject*>(QRegExp("harry"), Qt::FindDirectChildrenOnly);
+ QCOMPARE(l.size(), 0);
+
+ // empty and null string check
+ op = o.findChild<QObject*>(QString(), Qt::FindDirectChildrenOnly);
+ QCOMPARE(op, &o1);
+ op = o.findChild<QObject*>("", Qt::FindDirectChildrenOnly);
+ QCOMPARE(op, &unnamed);
+ op = o.findChild<QObject*>("unnamed", Qt::FindDirectChildrenOnly);
+ QCOMPARE(op, static_cast<QObject *>(0));
+
+ l = o.findChildren<QObject*>(QString(), Qt::FindDirectChildrenOnly);
+ QCOMPARE(l.size(), 5);
+ l = o.findChildren<QObject*>("", Qt::FindDirectChildrenOnly);
+ QCOMPARE(l.size(), 2);
+ l = o.findChildren<QObject*>("unnamed", Qt::FindDirectChildrenOnly);
+ QCOMPARE(l.size(), 0);
+
+ tl = o.findChildren<QTimer *>("t1", Qt::FindDirectChildrenOnly);
+ QCOMPARE(tl.size(), 1);
+ QCOMPARE(tl.at(0), &t1);
}