diff options
Diffstat (limited to 'src/corelib/doc/snippets/code')
35 files changed, 2080 insertions, 0 deletions
diff --git a/src/corelib/doc/snippets/code/src_corelib_animation_qparallelanimationgroup.cpp b/src/corelib/doc/snippets/code/src_corelib_animation_qparallelanimationgroup.cpp new file mode 100644 index 0000000000..3fc53bc58b --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_animation_qparallelanimationgroup.cpp @@ -0,0 +1,46 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtCore module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] + QParallelAnimationGroup *group = new QParallelAnimationGroup; + group->addAnimation(anim1); + group->addAnimation(anim2); + + group->start(); +//! [0] diff --git a/src/corelib/doc/snippets/code/src_corelib_animation_qpropertyanimation.cpp b/src/corelib/doc/snippets/code/src_corelib_animation_qpropertyanimation.cpp new file mode 100644 index 0000000000..a6dbd909d7 --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_animation_qpropertyanimation.cpp @@ -0,0 +1,48 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtCore module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + + +//! [0] + QPropertyAnimation *animation = new QPropertyAnimation(myWidget, "geometry"); + animation->setDuration(10000); + animation->setStartValue(QRect(0, 0, 100, 30)); + animation->setEndValue(QRect(250, 250, 100, 30)); + + animation->start(); +//! [0] diff --git a/src/corelib/doc/snippets/code/src_corelib_animation_qsequentialanimationgroup.cpp b/src/corelib/doc/snippets/code/src_corelib_animation_qsequentialanimationgroup.cpp new file mode 100644 index 0000000000..1f1363f127 --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_animation_qsequentialanimationgroup.cpp @@ -0,0 +1,47 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtCore module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] + QSequentialAnimationGroup *group = new QSequentialAnimationGroup; + + group->addAnimation(anim1); + group->addAnimation(anim2); + + group->start(); +//! [0] diff --git a/src/corelib/doc/snippets/code/src_corelib_animation_qvariantanimation.cpp b/src/corelib/doc/snippets/code/src_corelib_animation_qvariantanimation.cpp new file mode 100644 index 0000000000..b462ff2d6a --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_animation_qvariantanimation.cpp @@ -0,0 +1,52 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtCore module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] + QVariant myColorInterpolator(const QColor &start, const QColor &end, qreal progress) + { + ... + return QColor(...); + } + ... + qRegisterAnimationInterpolator<QColor>(myColorInterpolator); +//! [0] + +//! [1] + QVariant myInterpolator(const QVariant &from, const QVariant &to, qreal progress); +//! [1] diff --git a/src/corelib/doc/snippets/code/src_corelib_global_qglobal.cpp b/src/corelib/doc/snippets/code/src_corelib_global_qglobal.cpp index 9d029e5d4d..c73e782b76 100644 --- a/src/corelib/doc/snippets/code/src_corelib_global_qglobal.cpp +++ b/src/corelib/doc/snippets/code/src_corelib_global_qglobal.cpp @@ -725,3 +725,64 @@ bool readConfiguration(const QFile &file) #include <QtGui> #endif //! [qt-version-check] + +//! [is-empty] + qgetenv(varName).isEmpty() +//! [is-empty] + +//! [to-int] + qgetenv(varName).toInt(ok, 0) +//! [to-int] + +//! [is-null] + !qgetenv(varName).isNull() +//! [is-null] + +//! [as-const-0] + QString s = ...; + for (QChar ch : s) // detaches 's' (performs a deep-copy if 's' was shared) + process(ch); + for (QChar ch : qAsConst(s)) // ok, no detach attempt + process(ch); +//! [as-const-0] + +//! [as-const-1] + const QString s = ...; + for (QChar ch : s) // ok, no detach attempt on const objects + process(ch); +//! [as-const-1] + +//! [as-const-2] + for (QChar ch : funcReturningQString()) + process(ch); // OK, the returned object is kept alive for the loop's duration +//! [as-const-2] + +//! [as-const-3] + for (QChar ch : qAsConst(funcReturningQString())) + process(ch); // ERROR: ch is copied from deleted memory +//! [as-const-3] + +//! [as-const-4] + for (QChar ch : qAsConst(funcReturningQString())) + process(ch); // ERROR: ch is copied from deleted memory +//! [as-const-4] + +//! [qterminate] + try { expr; } catch(...) { qTerminate(); } +//! [qterminate] + +//! [qdecloverride] + // generate error if this doesn't actually override anything: + virtual void MyWidget::paintEvent(QPaintEvent*) Q_DECL_OVERRIDE; +//! [qdecloverride] + +//! [qdeclfinal-1] + // more-derived classes no longer permitted to override this: + virtual void MyWidget::paintEvent(QPaintEvent*) Q_DECL_FINAL; +//! [qdeclfinal-1] + +//! [qdeclfinal-2] + class QRect Q_DECL_FINAL { // cannot be derived from + // ... + }; +//! [qdeclfinal-2] diff --git a/src/corelib/doc/snippets/code/src_corelib_global_qlogging.cpp b/src/corelib/doc/snippets/code/src_corelib_global_qlogging.cpp new file mode 100644 index 0000000000..7b0b357cff --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_global_qlogging.cpp @@ -0,0 +1,42 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtCore module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] + QT_MESSAGE_PATTERN="[%{time yyyyMMdd h:mm:ss.zzz t} %{if-debug}D%{endif}%{if-info}I%{endif}%{if-warning}W%{endif}%{if-critical}C%{endif}%{if-fatal}F%{endif}] %{file}:%{line} - %{message}" +//! [0] diff --git a/src/corelib/doc/snippets/code/src_corelib_global_qnumeric.cpp b/src/corelib/doc/snippets/code/src_corelib_global_qnumeric.cpp new file mode 100644 index 0000000000..5d64070b1b --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_global_qnumeric.cpp @@ -0,0 +1,45 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtCore module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] + if (qFloatDistance(a, b) < (1 << 7)) { // The last 7 bits are not + // significant + // precise enough + } +//! [0] diff --git a/src/corelib/doc/snippets/code/src_corelib_global_qoperatingsystemversion.cpp b/src/corelib/doc/snippets/code/src_corelib_global_qoperatingsystemversion.cpp new file mode 100644 index 0000000000..d9e927c55a --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_global_qoperatingsystemversion.cpp @@ -0,0 +1,50 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtCore module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] + QOperatingSystemVersion::current() >= QOperatingSystemVersion(QOperatingSystemVersion::IOS, 9) +//! [0] + +//! [1] + auto current = QOperatingSystemVersion::current(); + if (current >= QOperatingSystemVersion::OSXYosemite || + current >= QOperatingSystemVersion(QOperatingSystemVersion::IOS, 8)) { + // returns true on macOS >= 10.10 and iOS >= 8.0, but false on macOS < 10.10 and iOS < 8.0 + } +//! [1] diff --git a/src/corelib/doc/snippets/code/src_corelib_global_qrandom.cpp b/src/corelib/doc/snippets/code/src_corelib_global_qrandom.cpp new file mode 100644 index 0000000000..b03e656b64 --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_global_qrandom.cpp @@ -0,0 +1,120 @@ +/**************************************************************************** +** +** Copyright (C) 2018 Intel Corporation. +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtCore module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] + quint32 value = QRandomGenerator::global()->generate(); +//! [0] + +//! [1] + QRandomGenerator prng1(1234), prng2(1234); + Q_ASSERT(prng1.generate() == prng2.generate()); + Q_ASSERT(prng1.generate64() == prng2.generate64()); +//! [1] + +//! [2] + int x = QRandomGenerator::global()->generate(); + int y = QRandomGenerator::global()->generate(); + int w = QRandomGenerator::global()->bounded(16384); + int h = QRandomGenerator::global()->bounded(16384); +//! [2] + +//! [3] + std::uniform_real_distribution dist(1, 2.5); + return dist(*QRandomGenerator::global()); +//! [3] + +//! [4] + std::seed_seq sseq(seedBuffer, seedBuffer + len); + QRandomGenerator generator(sseq); +//! [4] + +//! [5] + std::seed_seq sseq(begin, end); + QRandomGenerator generator(sseq); +//! [5] + +//! [6] + while (z--) + generator.generate(); +//! [6] + +//! [7] + std::generate(begin, end, [this]() { return generate(); }); +//! [7] + +//! [8] + std::generate(begin, end, []() { return QRandomGenerator::global()->generate64(); }); +//! [8] + +//! [9] + QVector<quint32> vector; + vector.resize(16); + QRandomGenerator::fillRange(vector.data(), vector.size()); +//! [9] + +//! [10] + quint32 array[2]; + QRandomGenerator::fillRange(array); +//! [10] + +//! [11] + QRandomGenerator64 rd; + return std::generate_canonical<qreal, std::numeric_limits<qreal>::digits>(rd); +//! [11] + +//! [12] + return generateDouble() * highest; +//! [12] + +//! [13] + quint32 v = QRandomGenerator::bounded(256); +//! [13] + +//! [14] + quint32 v = QRandomGenerator::bounded(1000, 2000); +//! [14] + +//! [15] + return QColor::fromRgb(QRandomGenerator::global()->generate()); +//! [15] + +//! [16] + qint64 value = QRandomGenerator64::generate() & std::numeric_limits<qint64>::max(); +//! [16] diff --git a/src/corelib/doc/snippets/code/src_corelib_io_qdebug.cpp b/src/corelib/doc/snippets/code/src_corelib_io_qdebug.cpp new file mode 100644 index 0000000000..4bbdc509ca --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_io_qdebug.cpp @@ -0,0 +1,84 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtCore module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] + QString s; + + s = "a"; + qDebug().noquote() << s; // prints: a + qDebug() << s; // prints: "a" + + s = "\"a\r\n\""; + qDebug() << s; // prints: "\"a\r\n\"" + + s = "\033"; // escape character + qDebug() << s; // prints: "\u001B" + + s = "\u00AD"; // SOFT HYPHEN + qDebug() << s; // prints: "\u00AD" + + s = "\u00E1"; // LATIN SMALL LETTER A WITH ACUTE + qDebug() << s; // prints: "á" + + s = "a\u0301"; // "a" followed by COMBINING ACUTE ACCENT + qDebug() << s; // prints: "á"; + + s = "\u0430\u0301"; // CYRILLIC SMALL LETTER A followed by COMBINING ACUTE ACCENT + qDebug() << s; // prints: "а́" +//! [0] + +//! [1] + QByteArray ba; + + ba = "a"; + qDebug().noquote() << ba; // prints: a + qDebug() << ba; // prints: "a" + + ba = "\"a\r\n\""; + qDebug() << ba; // prints: "\"a\r\n\"" + + ba = "\033"; // escape character + qDebug() << ba; // prints: "\x1B" + + ba = "\xC3\xA1"; + qDebug() << ba; // prints: "\xC3\xA1" + + ba = QByteArray("a\0b", 3); + qDebug() << ba // prints: "\a\x00""b" +//! [1] diff --git a/src/corelib/doc/snippets/code/src_corelib_io_qfileselector.cpp b/src/corelib/doc/snippets/code/src_corelib_io_qfileselector.cpp new file mode 100644 index 0000000000..91c94eb762 --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_io_qfileselector.cpp @@ -0,0 +1,82 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtWidgets module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] + QString defaultsBasePath = "data/"; + QString defaultsPath = defaultsBasePath + "defaults.conf"; + QString localizedPath = defaultsBasePath + + QString("%1/defaults.conf").arg(QLocale().name()); + if (QFile::exists(localizedPath)) + defaultsPath = localizedPath; + QFile defaults(defaultsPath); +//! [0] + +//! [1] + QString defaultsPath = "data/defaults.conf"; +#if defined(Q_OS_ANDROID) + defaultsPath = "data/android/defaults.conf"; +#elif defined(Q_OS_IOS) + defaultsPath = "data/ios/defaults.conf"; +#endif + QFile defaults(defaultsPath); +//! [1] + +//! [2] + QFileSelector selector; + QFile defaultsFile(selector.select("data/defaults.conf")); +//! [2] + +//! [3] + data/defaults.conf + data/+android/defaults.conf + data/+ios/+en_GB/defaults.conf +//! [3] + +//! [4] + images/background.png + images/+android/+en_GB/background.png +//! [4] + +//! [5] + images/background.png + images/+linux/background.png + images/+windows/background.png + images/+admin/background.png + images/+admin/+linux/background.png +//! [5] diff --git a/src/corelib/doc/snippets/code/src_corelib_io_qloggingcategory.cpp b/src/corelib/doc/snippets/code/src_corelib_io_qloggingcategory.cpp new file mode 100644 index 0000000000..20ae52a251 --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_io_qloggingcategory.cpp @@ -0,0 +1,57 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtCore module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] + <category>[.<type>] = true|false +//! [0] + +//! [1] + QLoggingCategory::setFilterRules("*.debug=false\n" + "driver.usb.debug=true"); +//! [1] + +//! [2] + [Rules] + *.debug=false + driver.usb.debug=true +//! [2] + +//! [3] + QT_LOGGING_RULES="*.debug=false;driver.usb.debug=true" +//! [3] diff --git a/src/corelib/doc/snippets/code/src_corelib_io_qtemporaryfile.cpp b/src/corelib/doc/snippets/code/src_corelib_io_qtemporaryfile.cpp index 127c7bd0d9..4e864b3dcd 100644 --- a/src/corelib/doc/snippets/code/src_corelib_io_qtemporaryfile.cpp +++ b/src/corelib/doc/snippets/code/src_corelib_io_qtemporaryfile.cpp @@ -61,3 +61,11 @@ // as it goes out of scope. //! [0] } + +//! [1] + QFile f(":/resources/file.txt"); + QTemporaryFile::createNativeFile(f); // Returns a pointer to a temporary file + + QFile f("/users/qt/file.txt"); + QTemporaryFile::createNativeFile(f); // Returns 0 +//! [1] diff --git a/src/corelib/doc/snippets/code/src_corelib_io_qurl.cpp b/src/corelib/doc/snippets/code/src_corelib_io_qurl.cpp index b2a2282085..79af776ce4 100644 --- a/src/corelib/doc/snippets/code/src_corelib_io_qurl.cpp +++ b/src/corelib/doc/snippets/code/src_corelib_io_qurl.cpp @@ -101,3 +101,89 @@ QUrl url("http://qt-project.org/support/file.html"); // url.adjusted(RemoveFilename) == "http://qt-project.org/support/" // url.fileName() == "file.html" //! [7] + +//! [8] + qDebug() << QUrl("main.qml").isRelative(); // true: no scheme + qDebug() << QUrl("qml/main.qml").isRelative(); // true: no scheme + qDebug() << QUrl("file:main.qml").isRelative(); // false: has "file" scheme + qDebug() << QUrl("file:qml/main.qml").isRelative(); // false: has "file" scheme +//! [8] + +//! [9] + // Absolute URL, relative path + QUrl url("file:file.txt"); + qDebug() << url.isRelative(); // false: has "file" scheme + qDebug() << QDir::isAbsolutePath(url.path()); // false: relative path + + // Relative URL, absolute path + url = QUrl("/home/user/file.txt"); + qDebug() << url.isRelative(); // true: has no scheme + qDebug() << QDir::isAbsolutePath(url.path()); // true: absolute path +//! [9] + +//! [10] + QUrl original("http://example.com/?q=a%2B%3Db%26c"); + QUrl copy(original); + copy.setQuery(copy.query(QUrl::FullyDecoded), QUrl::DecodedMode); + + qDebug() << original.toString(); // prints: http://example.com/?q=a%2B%3Db%26c + qDebug() << copy.toString(); // prints: http://example.com/?q=a+=b&c +//! [10] + +//! [11] + QUrl url; + url.setScheme("ftp"); +//! [11] + +//! [12] + qDebug() << QUrl("file:file.txt").path(); // "file.txt" + qDebug() << QUrl("/home/user/file.txt").path(); // "/home/user/file.txt" + qDebug() << QUrl("http://www.example.com/test/123").path(); // "/test/123" +//! [12] + +//! [13] + qDebug() << QUrl("/foo%FFbar").path(); +//! [13] + +//! [14] + qDebug() << QUrl("/foo+bar%2B").path(); // "/foo+bar+" +//! [14] + +//! [15] + const QUrl url("/tmp/Mambo %235%3F.mp3"); + qDebug() << url.path(QUrl::FullyDecoded); // "/tmp/Mambo #5?.mp3" + qDebug() << url.path(QUrl::PrettyDecoded); // "/tmp/Mambo #5?.mp3" + qDebug() << url.path(QUrl::FullyEncoded); // "/tmp/Mambo%20%235%3F.mp3" +//! [15] + +//! [16] + qDebug() << QUrl::fromLocalFile("file.txt"); // QUrl("file:file.txt") + qDebug() << QUrl::fromLocalFile("/home/user/file.txt"); // QUrl("file:///home/user/file.txt") + qDebug() << QUrl::fromLocalFile("file:file.txt"); // doesn't make sense; expects path, not url with scheme +//! [16] + +//! [17] + QUrl url = QUrl::fromLocalFile("file.txt"); + QUrl baseUrl = QUrl("file:/home/user/"); + // wrong: prints QUrl("file:file.txt"), as url already has a scheme + qDebug() << baseUrl.resolved(url); +//! [17] + +//! [18] + // correct: prints QUrl("file:///home/user/file.txt") + url.setScheme(QString()); + qDebug() << baseUrl.resolved(url); +//! [18] + +//! [19] + QUrl url = QUrl("file.txt"); + QUrl baseUrl = QUrl("file:/home/user/"); + // prints QUrl("file:///home/user/file.txt") + qDebug() << baseUrl.resolved(url); +//! [19] + +//! [20] + qDebug() << QUrl("file:file.txt").toLocalFile(); // "file:file.txt" + qDebug() << QUrl("file:/home/user/file.txt").toLocalFile(); // "file:///home/user/file.txt" + qDebug() << QUrl("file.txt").toLocalFile(); // ""; wasn't a local file as it had no scheme +//! [20] diff --git a/src/corelib/doc/snippets/code/src_corelib_io_qurlquery.cpp b/src/corelib/doc/snippets/code/src_corelib_io_qurlquery.cpp new file mode 100644 index 0000000000..da87bfd143 --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_io_qurlquery.cpp @@ -0,0 +1,43 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtWidgets module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] +sub-delims = "!" / "$" / "&" / "'" / "(" / ")" + / "*" / "+" / "," / ";" / "=" +//! [0] diff --git a/src/corelib/doc/snippets/code/src_corelib_kernel_qdeadlinetimer.cpp b/src/corelib/doc/snippets/code/src_corelib_kernel_qdeadlinetimer.cpp new file mode 100644 index 0000000000..eb291d7b18 --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_kernel_qdeadlinetimer.cpp @@ -0,0 +1,123 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtWidgets module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] + void executeOperation(int msecs) + { + QDeadlineTimer deadline(msecs); + do { + if (readFromDevice(deadline.remainingTime()) + break; + waitForReadyRead(deadline); + } while (!deadline.hasExpired()); + } +//! [0] + +//! [1] + using namespace std::chrono; + using namespace std::chrono_literals; + + QDeadlineTimer deadline(30s); + device->waitForReadyRead(deadline); + if (deadline.remainingTime<nanoseconds>() > 300ms) + cleanup(); +//! [1] + +//! [2] + using namespace std::chrono; + using namespace std::chrono_literals; + auto now = steady_clock::now(); + QDeadlineTimer deadline(now + 1s); + Q_ASSERT(deadline == now + 1s); +//! [2] + +//! [3] + using namespace std::chrono_literals; + QDeadlineTimer deadline(250ms); +//! [3] + +//! [4] + using namespace std::chrono_literals; + deadline.setRemainingTime(250ms); +//! [4] + +//! [5] + mutex.tryLock(deadline.remainingTime()); +//! [5] + +//! [6] + qint64 realTimeLeft = deadline.deadline(); + if (realTimeLeft != (std::numeric_limits<qint64>::max)()) { + realTimeLeft -= QDeadlineTimer::current().deadline(); + // or: + //QElapsedTimer timer; + //timer.start(); + //realTimeLeft -= timer.msecsSinceReference(); + } +//! [6] + +//! [7] + qint64 realTimeLeft = deadline.deadlineNSecs(); + if (realTimeLeft != std::numeric_limits<qint64>::max()) + realTimeLeft -= QDeadlineTimer::current().deadlineNSecs(); +//! [7] + +//! [8] + return d1.deadlineNSecs() == d2.deadlineNSecs(); +//! [8] + +//! [9] + return d1.deadlineNSecs() != d2.deadlineNSecs(); +//! [9] + +//! [10] + return d1.deadlineNSecs() < d2.deadlineNSecs(); +//! [10] + +//! [11] + return d1.deadlineNSecs() <= d2.deadlineNSecs(); +//! [11] + +//! [12] + return d1.deadlineNSecs() > d2.deadlineNSecs(); +//! [12] + +//! [13] + return d1.deadlineNSecs() >= d2.deadlineNSecs(); +//! [13] diff --git a/src/corelib/doc/snippets/code/src_corelib_kernel_qmetaobject.cpp b/src/corelib/doc/snippets/code/src_corelib_kernel_qmetaobject.cpp index eda52cfacd..56d1fa5a63 100644 --- a/src/corelib/doc/snippets/code/src_corelib_kernel_qmetaobject.cpp +++ b/src/corelib/doc/snippets/code/src_corelib_kernel_qmetaobject.cpp @@ -147,4 +147,23 @@ method.invoke(obj, QMetaMethod destroyedSignal = QMetaMethod::fromSignal(&QObject::destroyed); //! [9] +//! [10] + // In the class MainWindow declaration + #ifndef Q_MOC_RUN + // define the tag text as empty, so the compiler doesn't see it + # define MY_CUSTOM_TAG + #endif + ... + private slots: + MY_CUSTOM_TAG void testFunc(); +//! [10] + +//! [11] + MainWindow win; + win.show(); + + int functionIndex = win.metaObject()->indexOfSlot("testFunc()"); + QMetaMethod mm = win.metaObject()->method(functionIndex); + qDebug() << mm.tag(); // prints MY_CUSTOM_TAG +//! [11] } diff --git a/src/corelib/doc/snippets/code/src_corelib_kernel_qobject.cpp b/src/corelib/doc/snippets/code/src_corelib_kernel_qobject.cpp index 6451f46b36..1e31a5292f 100644 --- a/src/corelib/doc/snippets/code/src_corelib_kernel_qobject.cpp +++ b/src/corelib/doc/snippets/code/src_corelib_kernel_qobject.cpp @@ -538,3 +538,16 @@ QString text = MyMagicClass::tr("Sim sala bim."); //! [explicit tr context] QString text = QScrollBar::tr("Page up"); //! [explicit tr context] + +//! [53] +{ +const QSignalBlocker blocker(someQObject); +// no signals here +} +//! [53] + +//! [54] +const bool wasBlocked = someQObject->blockSignals(true); +// no signals here +someQObject->blockSignals(wasBlocked); +//! [54] diff --git a/src/corelib/doc/snippets/code/src_corelib_kernel_qtestsupport_core.cpp b/src/corelib/doc/snippets/code/src_corelib_kernel_qtestsupport_core.cpp new file mode 100644 index 0000000000..ed3e9bd0c0 --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_kernel_qtestsupport_core.cpp @@ -0,0 +1,52 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtTest module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] + MyObject obj; + obj.startup(); + QTest::qWaitFor([&]() { + return obj.isReady(); + }, 3000); +//! [0] + +//! [1] + int i = 0; + while (myNetworkServerNotResponding() && i++ < 50) + QTest::qWait(250); +//! [1] diff --git a/src/corelib/doc/snippets/code/src_corelib_mimetype_qmimedatabase.cpp b/src/corelib/doc/snippets/code/src_corelib_mimetype_qmimedatabase.cpp index c5874d83b8..3092e32f6f 100644 --- a/src/corelib/doc/snippets/code/src_corelib_mimetype_qmimedatabase.cpp +++ b/src/corelib/doc/snippets/code/src_corelib_mimetype_qmimedatabase.cpp @@ -55,3 +55,18 @@ if (mime.inherits("text/plain")) { // The file is plain text, we can display it in a QTextEdit } //! [0] + +//! [1] +QStandardPaths::locateAll(QStandardPaths::GenericDataLocation, QLatin1String("mime/packages"), + QStandardPaths::LocateDirectory); +//! [1] + +//! [2] +<?xml version="1.0" encoding="UTF-8"?> +<mime-info xmlns="http://www.freedesktop.org/standards/shared-mime-info"> + <mime-type type="application/vnd.qt.qmakeprofile"> + <comment xml:lang="en">Qt qmake Profile</comment> + <glob pattern="*.pro" weight="50"/> + </mime-type> +</mime-info> +//! [2] diff --git a/src/corelib/doc/snippets/code/src_corelib_serialization_qcborstream.cpp b/src/corelib/doc/snippets/code/src_corelib_serialization_qcborstream.cpp new file mode 100644 index 0000000000..dbe38aa4b5 --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_serialization_qcborstream.cpp @@ -0,0 +1,347 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtWidgets module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] + QCborValue(QCborTag(2), QByteArray("\x01\0\0\0\0\0\0\0\0", 9)); +//! [0] + +//! [1] + writer.startMap(4); // 4 elements in the map + + writer.append(QLatin1String("label")); + writer.append(QLatin1String("journald")); + + writer.append(QLatin1String("autoDetect")); + writer.append(false); + + writer.append(QLatin1String("condition")); + writer.append(QLatin1String("libs.journald")); + + writer.append(QLatin1String("output")); + writer.startArray(1); + writer.append(QLatin1String("privateFeature")); + writer.endArray(); + + writer.endMap(); +//! [1] + +//! [2] + QFile f("output", QIODevice::WriteOnly); + QCborStreamWriter writer(&f); + writer.startMap(0); + writer.endMap(); +//! [2] + +//! [3] + QByteArray encodedNumber(qint64 value) + { + QByteArray ba; + QCborStreamWriter writer(&ba); + writer.append(value); + return ba; + } +//! [3] + +//! [4] + writer.append(0U); + writer.append(Q_UINT64_C(4294967296)); + writer.append(std::numeric_limits<quint64>::max()); +//! [4] + +//! [5] + writer.append(0); + writer.append(-1); + writer.append(Q_INT64_C(4294967296)); + writer.append(std::numeric_limits<qint64>::max()); +//! [5] + +//! [6] + writer.append(QCborNegativeInteger(1)); + writer.append(QCborNegativeInteger(Q_INT64_C(4294967296))); + writer.append(QCborNegativeInteger(-quint64(std::numeric_limits<qint64>::min()))); +//! [6] + +//! [7] + void writeFile(QCborStreamWriter &writer, const QString &fileName) + { + QFile f(fileName); + if (f.open(QIODevice::ReadOnly)) + writer.append(f.readAll()); + } +//! [7] + +//! [8] + writer.append(QLatin1String("Hello, World")); +//! [8] + +//! [9] + void writeString(QCborStreamWriter &writer, const QString &str) + { + writer.append(str); + } +//! [9] + +//! [10] + void writeRxPattern(QCborStreamWriter &writer, const QRegularExpression &rx) + { + writer.append(QCborTag(36)); + writer.append(rx.pattern()); + } +//! [10] + +//! [11] + void writeCurrentTime(QCborStreamWriter &writer) + { + writer.append(QCborKnownTags::UnixTime_t); + writer.append(time(nullptr)); + } +//! [11] + +//! [12] + writer.append(QCborSimpleType::Null); + writer.append(QCborSimpleType(32)); +//! [12] + +//! [13] + void writeFloat(QCborStreamWriter &writer, float f) + { + qfloat16 f16 = f; + if (qIsNaN(f) || f16 == f) + writer.append(f16); + else + writer.append(f); + } +//! [13] + +//! [14] + void writeFloat(QCborStreamWriter &writer, double d) + { + float f = d; + if (qIsNaN(d) || d == f) + writer.append(f); + else + writer.append(d); + } +//! [14] + +//! [15] + void writeDouble(QCborStreamWriter &writer, double d) + { + float f; + if (qIsNaN(d)) { + writer.append(qfloat16(qQNaN())); + } else if (qIsInf(d)) { + writer.append(d < 0 ? -qInf() : qInf()); + } else if ((f = d) == d) { + qfloat16 f16 = f; + if (f16 == f) + writer.append(f16); + else + writer.append(f); + } else { + writer.append(d); + } + } +//! [15] + +//! [16] + writer.append(b ? QCborSimpleType::True : QCborSimpleType::False); +//! [16] + +//! [17] + writer.append(QCborSimpleType::Null); +//! [17] + +//! [18] + writer.append(QCborSimpleType::Null); +//! [18] + +//! [19] + writer.append(QCborSimpleType::Undefined); +//! [19] + +//! [20] + void appendList(QCborStreamWriter &writer, const QLinkedList<QString> &list) + { + writer.startArray(); + for (const QString &s : list) + writer.append(s); + writer.endArray(); + } +//! [20] + +//! [21] + void appendList(QCborStreamWriter &writer, const QStringList &list) + { + writer.startArray(list.size()); + for (const QString &s : list) + writer.append(s); + writer.endArray(); + } +//! [21] + +//! [22] + void appendMap(QCborStreamWriter &writer, const QLinkedList<QPair<int, QString>> &list) + { + writer.startMap(); + for (const auto pair : list) { + writer.append(pair.first) + writer.append(pair.second); + } + writer.endMap(); + } +//! [22] + +//! [23] + void appendMap(QCborStreamWriter &writer, const QMap<int, QString> &map) + { + writer.startMap(map.size()); + for (auto it = map.begin(); it != map.end(); ++it) { + writer.append(it.key()); + writer.append(it.value()); + } + writer.endMap(); + } +//! [23] + +//! [24] + void handleStream(QCborStreamReader &reader) + { + switch (reader.type()) + case QCborStreamReader::UnsignedInteger: + case QCborStreamReader::NegativeInteger: + case QCborStreamReader::SimpleType: + case QCborStreamReader::Float16: + case QCborStreamReader::Float: + case QCborStreamReader::Double: + handleFixedWidth(reader); + reader.next(); + break; + case QCborStreamReader::ByteArray: + case QCborStreamReader::String: + handleString(reader); + break; + case QCborStreamReader::Array: + case QCborStreamReader::Map: + reader.enterContainer(); + while (reader.lastError() == QCborError::NoError) + handleStream(reader); + if (reader.lastError() == QCborError::NoError) + reader.leaveContainer(); + } + } +//! [24] + +//! [25] + QVariantList populateFromCbor(QCborStreamReader &reader) + { + QVariantList list; + if (reader.isLengthKnown()) + list.reserve(reader.length()); + + reader.enterContainer(); + while (reader.lastError() == QCborError::NoError && reader.hasNext()) + list.append(readOneElement(reader)); + if (reader.lastError() == QCborError::NoError) + reader.leaveContainer(); + } +//! [25] + +//! [26] + QVariantMap populateFromCbor(QCborStreamReader &reader) + { + QVariantMap map; + if (reader.isLengthKnown()) + map.reserve(reader.length()); + + reader.enterContainer(); + while (reader.lastError() == QCborError::NoError && reader.hasNext()) { + QString key = readElementAsString(reader); + map.insert(key, readOneElement(reader)); + } + if (reader.lastError() == QCborError::NoError) + reader.leaveContainer(); + } +//! [26] + +//! [27] + QString decodeString(QCborStreamReader &reader) + { + QString result; + auto r = reader.readString(); + while (r.code == QCborStreamReader::Ok) { + result += r.data; + r = reader.readString(); + } + + if (r.code == QCborStreamReader::Error) { + // handle error condition + result.clear(); + } + return result; + } +//! [27] + +//! [28] + QBytearray decodeBytearray(QCborStreamReader &reader) + { + QBytearray result; + auto r = reader.readBytearray(); + while (r.code == QCborStreamReader::Ok) { + result += r.data; + r = reader.readByteArray(); + } + + if (r.code == QCborStreamReader::Error) { + // handle error condition + result.clear(); + } + return result; + } +//! [28] + +//! [29] + QCborStreamReader<qsizetype> result; + do { + qsizetype size = reader.currentStringChunkSize(); + qsizetype oldsize = buffer.size(); + buffer.resize(oldsize + size); + result = reader.readStringChunk(buffer.data() + oldsize, size); + } while (result.status() == QCborStreamReader::Ok); +//! [29] diff --git a/src/corelib/doc/snippets/code/src_corelib_serialization_qcborvalue.cpp b/src/corelib/doc/snippets/code/src_corelib_serialization_qcborvalue.cpp new file mode 100644 index 0000000000..63f813cf69 --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_serialization_qcborvalue.cpp @@ -0,0 +1,69 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtWidgets module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] + QCborValue(uuid) == QCborValue(QCborKnownTags::Uuid, uuid.toRfc4122()); +//! [0] + +//! [1] + QCborValue value(QCborSimpleType(12)); +//! [1] + +//! [2] + value.isSimpleType(QCborSimpleType(12)); +//! [2] + +//! [3] + QCborValue(QUrl("https://example.com")) == QCborValue(QCborKnownTags::Url, "https://example.com"); +//! [3] + +//! [4] + value.toMap().value(key); +//! [4] + +//! [5] + value.toMap().value(key); +//! [5] + +//! [6] + if (reader.isTag() && reader.toTag() == QCborKnownTags::Signature) + reader.next(); + + QCborValue contents = QCborValue::fromCbor(reader); +//! [6] diff --git a/src/corelib/doc/snippets/code/src_corelib_serialization_qdatastream.cpp b/src/corelib/doc/snippets/code/src_corelib_serialization_qdatastream.cpp new file mode 100644 index 0000000000..5caaa16727 --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_serialization_qdatastream.cpp @@ -0,0 +1,48 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtCore module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] + QDataStream &operator<<(QDataStream &, const QXxx &); + QDataStream &operator>>(QDataStream &, QXxx &); +//! [0] + +//! [1] + QDataStream & operator<< (QDataStream& stream, const QImage& image); + QDataStream & operator>> (QDataStream& stream, QImage& image); +//! [1] diff --git a/src/corelib/doc/snippets/code/src_corelib_serialization_qjsondocument.cpp b/src/corelib/doc/snippets/code/src_corelib_serialization_qjsondocument.cpp new file mode 100644 index 0000000000..c4913b1740 --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_serialization_qjsondocument.cpp @@ -0,0 +1,54 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtCore module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] + { + "Array": [ + true, + 999, + "string" + ], + "Key": "Value", + "null": null + } +//! [0] + +//! [1] + {"Array":[true,999,"string"],"Key":"Value","null":null} +//! [1] diff --git a/src/corelib/doc/snippets/code/src_corelib_thread_qsemaphore.cpp b/src/corelib/doc/snippets/code/src_corelib_thread_qsemaphore.cpp index 2081e4fdd0..52105bce0b 100644 --- a/src/corelib/doc/snippets/code/src_corelib_thread_qsemaphore.cpp +++ b/src/corelib/doc/snippets/code/src_corelib_thread_qsemaphore.cpp @@ -81,3 +81,32 @@ QSemaphore sem(5); // sem.available() == 5 sem.tryAcquire(250, 1000); // sem.available() == 5, waits 1000 milliseconds and returns false sem.tryAcquire(3, 30000); // sem.available() == 2, returns true without waiting //! [3] + +//! [4] +// ... do something that may throw or return early +sem.release(); +//! [4] + +//! [5] +const QSemaphoreReleaser releaser(sem); +// ... do something that may throw or early return +// implicitly calls sem.release() here and at every other return in between +//! [5] + +//! [6] +{ // some scope + QSemaphoreReleaser releaser; // does nothing + // ... + if (someCondition) { + releaser = QSemaphoreReleaser(sem); + // ... + } + // ... +} // conditionally calls sem.release(), depending on someCondition +//! [6] + +//! [7] +releaser.cancel(); // avoid releasing old semaphore() +releaser = QSemaphoreReleaser(sem, 42); +// now will call sem.release(42) when 'releaser' is destroyed +//! [7] diff --git a/src/corelib/doc/snippets/code/src_corelib_tools_qbytearray.cpp b/src/corelib/doc/snippets/code/src_corelib_tools_qbytearray.cpp index bd7cdaa681..32fccbefbf 100644 --- a/src/corelib/doc/snippets/code/src_corelib_tools_qbytearray.cpp +++ b/src/corelib/doc/snippets/code/src_corelib_tools_qbytearray.cpp @@ -470,6 +470,33 @@ ba4.size(); // Returns 6. ba4.constData(); // Returns "ca\0r\0t" without terminating \0. //! [48] +//! [49] +QByteArray ba("ab"); +ba.repeated(4); // returns "abababab" +//! [49] + +//! [50] +QByteArray macAddress = QByteArray::fromHex("123456abcdef"); +macAddress.toHex(':'); // returns "12:34:56:ab:cd:ef" +macAddress.toHex(0); // returns "123456abcdef" +//! [50] + +//! [51] +QByteArray text = QByteArray::fromPercentEncoding("Qt%20is%20great%33"); +text.data(); // returns "Qt is great!" +//! [51] + +//! [52] +QByteArray text = "{a fishy string?}"; +QByteArray ba = text.toPercentEncoding("{}", "s"); +qDebug(ba.constData()); +// prints "{a fi%73hy %73tring%3F}" +//! [52] + +//! [53] +QByteArray ba = QByteArrayLiteral("byte array contents"); +//! [53] + } diff --git a/src/corelib/doc/snippets/code/src_corelib_tools_qbytearraymatcher.cpp b/src/corelib/doc/snippets/code/src_corelib_tools_qbytearraymatcher.cpp new file mode 100644 index 0000000000..63fc1f91e7 --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_tools_qbytearraymatcher.cpp @@ -0,0 +1,46 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtCore module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] +static const auto matcher = qMakeStaticByteArrayMatcher("needle"); +//! [0] + +//! [1] +static const auto matcher = qMakeStaticByteArrayMatcher("needle"); +//! [1] diff --git a/src/corelib/doc/snippets/code/src_corelib_tools_qcontiguouscache.cpp b/src/corelib/doc/snippets/code/src_corelib_tools_qcontiguouscache.cpp new file mode 100644 index 0000000000..6bc9604243 --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_tools_qcontiguouscache.cpp @@ -0,0 +1,59 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtCore module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] +MyRecord record(int row) const +{ + Q_ASSERT(row >= 0 && row < count()); + + while (row > cache.lastIndex()) + cache.append(slowFetchRecord(cache.lastIndex()+1)); + while (row < cache.firstIndex()) + cache.prepend(slowFetchRecord(cache.firstIndex()-1)); + + return cache.at(row); +} +//! [0] + +//! [1] +QContiguousCache<int> cache(10); +cache.insert(INT_MAX, 1); // cache contains one value and has valid indexes, INT_MAX to INT_MAX +cache.append(2); // cache contains two values but does not have valid indexes. +cache.normalizeIndexes(); // cache has two values, 1 and 2. New first index will be in the range of 0 to capacity(). +//! [1] diff --git a/src/corelib/doc/snippets/code/src_corelib_tools_qhash.cpp b/src/corelib/doc/snippets/code/src_corelib_tools_qhash.cpp index c7df6f6090..a3d2dd7f9e 100644 --- a/src/corelib/doc/snippets/code/src_corelib_tools_qhash.cpp +++ b/src/corelib/doc/snippets/code/src_corelib_tools_qhash.cpp @@ -350,3 +350,23 @@ inline uint qHash(const std::unordered_set<int> &key, uint seed = 0) return qHashRangeCommutative(key.begin(), key.end(), seed); } //! [qhashrangecommutative] + +//! [29] +qHash(qMakePair(key.first, key.second), seed); +//! [29] + +//! [30] +{0, 1, 2} +//! [30] + +//! [31] +{1, 2, 0} +//! [31] + +//! [32] +uint qHash(K key); +uint qHash(const K &key); + +uint qHash(K key, uint seed); +uint qHash(const K &key, uint seed); +//! [32] diff --git a/src/corelib/doc/snippets/code/src_corelib_tools_qrect.cpp b/src/corelib/doc/snippets/code/src_corelib_tools_qrect.cpp index 4bdaa4d657..a19dc086ac 100644 --- a/src/corelib/doc/snippets/code/src_corelib_tools_qrect.cpp +++ b/src/corelib/doc/snippets/code/src_corelib_tools_qrect.cpp @@ -58,3 +58,13 @@ QRect r2(QPoint(100, 200), QSize(11, 16)); QRectF r1(100.0, 200.1, 11.2, 16.3); QRectF r2(QPointF(100.0, 200.1), QSizeF(11.2, 16.3)); //! [1] + +//! [2] +QRect r = {15, 51, 42, 24}; +r = r.transposed(); // r == {15, 51, 24, 42} +//! [2] + +//! [3] +QRectF r = {1.5, 5.1, 4.2, 2.4}; +r = r.transposed(); // r == {1.5, 5.1, 2.4, 4.2} +//! [3] diff --git a/src/corelib/doc/snippets/code/src_corelib_tools_qregularexpression.cpp b/src/corelib/doc/snippets/code/src_corelib_tools_qregularexpression.cpp index b5d8320bce..afdd9c3d25 100644 --- a/src/corelib/doc/snippets/code/src_corelib_tools_qregularexpression.cpp +++ b/src/corelib/doc/snippets/code/src_corelib_tools_qregularexpression.cpp @@ -360,4 +360,12 @@ QString wildcard = QRegularExpression::wildcardToRegularExpression("*.jpeg"); //! [31] } +//! [32] + (?<day>\d\d)-(?<month>\d\d)-(?<year>\d\d\d\d) (\w+) (?<name>\w+) +//! [32] + +//! [33] + ("", "day", "month", "year", "", "name") +//! [33] + } diff --git a/src/corelib/doc/snippets/code/src_corelib_tools_qshareddata.cpp b/src/corelib/doc/snippets/code/src_corelib_tools_qshareddata.cpp new file mode 100644 index 0000000000..45e8b0a965 --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_tools_qshareddata.cpp @@ -0,0 +1,55 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtCore module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] + class EmployeeData; +//! [0] + +//! [1] + template<> + EmployeeData *QSharedDataPointer<EmployeeData>::clone() + { + return d->clone(); + } +//! [1] + +//! [2] + QExplicitlySharedDataPointer<Base> base(new Base); + QExplicitlySharedDataPointer<Derived> derived(base); // !!! DANGER !!! +//! [2] diff --git a/src/corelib/doc/snippets/code/src_corelib_tools_qsharedpointer.cpp b/src/corelib/doc/snippets/code/src_corelib_tools_qsharedpointer.cpp new file mode 100644 index 0000000000..69061ce298 --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_tools_qsharedpointer.cpp @@ -0,0 +1,146 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtCore module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] + class Y: public QEnableSharedFromThis<Y> + { + public: + QSharedPointer<Y> f() + { + return sharedFromThis(); + } + }; + + int main() + { + QSharedPointer<Y> p(new Y()); + QSharedPointer<Y> y = p->f(); + Q_ASSERT(p == y); // p and q must share ownership + } +//! [0] + +//! [1] + class ScriptInterface : public QObject + { + Q_OBJECT + + // ... + + public slots: + void slotCalledByScript(Y *managedBySharedPointer) + { + QSharedPointer<Y> yPtr = managedBySharedPointer->sharedFromThis(); + // Some other code unrelated to scripts that expects a QSharedPointer<Y> ... + } + }; +//! [1] + +//! [2] + static void doDeleteLater(MyObject *obj) + { + obj->deleteLater(); + } + + void otherFunction() + { + QSharedPointer<MyObject> obj = + QSharedPointer<MyObject>(new MyObject, doDeleteLater); + + // continue using obj + obj.clear(); // calls obj->deleteLater(); + } +//! [2] + +//! [3] + QSharedPointer<MyObject> obj = + QSharedPointer<MyObject>(new MyObject, &QObject::deleteLater); +//! [3] + +//! [4] + if (sharedptr) { ... } +//! [4] + +//! [5] + if (!sharedptr) { ... } +//! [5] + +//! [6] + QSharedPointer<T> other(t); this->swap(other); +//! [6] + +//! [7] + QSharedPointer<T> other(t, deleter); this->swap(other); +//! [7] + +//! [8] + if (weakref) { ... } +//! [8] + +//! [9] + if (!weakref) { ... } +//! [9] + +//! [10] + qDebug("Tracking %p", weakref.data()); +//! [10] + +//! [11] + // this pointer cannot be used in another thread + // so other threads cannot delete it + QWeakPointer<int> weakref = obtainReference(); + + Object *obj = weakref.data(); + if (obj) { + // if the pointer wasn't deleted yet, we know it can't get + // deleted by our own code here nor the functions we call + otherFunction(obj); + } +//! [11] + +//! [12] + QWeakPointer<int> weakref; + + // ... + + QSharedPointer<int> strong = weakref.toStrongRef(); + if (strong) + qDebug() << "The value is:" << *strong; + else + qDebug() << "The value has already been deleted"; +//! [12] diff --git a/src/corelib/doc/snippets/code/src_corelib_tools_qstring.cpp b/src/corelib/doc/snippets/code/src_corelib_tools_qstring.cpp index 9b3e89e5c4..4e79d1e27a 100644 --- a/src/corelib/doc/snippets/code/src_corelib_tools_qstring.cpp +++ b/src/corelib/doc/snippets/code/src_corelib_tools_qstring.cpp @@ -102,3 +102,21 @@ QString plain = "#include <QtCore>" QString html = plain.toHtmlEscaped(); // html == "#include <QtCore>" //! [7] + +//! [8] +QString str("ab"); +str.repeated(4); // returns "abababab" +//! [8] + +//! [9] +// hasAttribute takes a QString argument +if (node.hasAttribute("http-contents-length")) //... +//! [9] + +//! [10] +if (node.hasAttribute(QStringLiteral(u"http-contents-length"))) //... +//! [10] + +//! [11] +if (attribute.name() == QLatin1String("http-contents-length")) //... +//! [11] diff --git a/src/corelib/doc/snippets/code/src_corelib_tools_qstringview.cpp b/src/corelib/doc/snippets/code/src_corelib_tools_qstringview.cpp new file mode 100644 index 0000000000..5dc153372c --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_tools_qstringview.cpp @@ -0,0 +1,51 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtWidgets module 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] + void myfun1(QStringView sv); // preferred + void myfun2(const QStringView &sv); // compiles and works, but slower +//! [0] + +//! [1] + void fun(QChar ch) { fun(QStringView(&ch, 1)); } +//! [1] + +//! [2] + auto sv = QStringView(array, std::size(array)); // using C++17 std::size() +//! [2] |