summaryrefslogtreecommitdiffstats
path: root/doc/src/snippets/code/src_corelib_kernel_qobject.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'doc/src/snippets/code/src_corelib_kernel_qobject.cpp')
-rw-r--r--doc/src/snippets/code/src_corelib_kernel_qobject.cpp493
1 files changed, 0 insertions, 493 deletions
diff --git a/doc/src/snippets/code/src_corelib_kernel_qobject.cpp b/doc/src/snippets/code/src_corelib_kernel_qobject.cpp
deleted file mode 100644
index 5b27775322..0000000000
--- a/doc/src/snippets/code/src_corelib_kernel_qobject.cpp
+++ /dev/null
@@ -1,493 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/
-**
-** This file is part of the documentation of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** You may use this file under the terms of the BSD license as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-** * Redistributions of source code must retain the above copyright
-** notice, this list of conditions and the following disclaimer.
-** * Redistributions in binary form must reproduce the above copyright
-** notice, this list of conditions and the following disclaimer in
-** the documentation and/or other materials provided with the
-** distribution.
-** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
-** the names of its contributors may be used to endorse or promote
-** products derived from this software without specific prior written
-** permission.
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-//! [0]
-QLineEdit *lineEdit = static_cast<QLineEdit *>(
- qt_find_obj_child(myWidget, "QLineEdit", "my line edit"));
-if (lineEdit)
- lineEdit->setText("Default");
-//! [0]
-
-
-//! [1]
-QObject *obj = new QPushButton;
-obj->metaObject()->className(); // returns "QPushButton"
-
-QPushButton::staticMetaObject.className(); // returns "QPushButton"
-//! [1]
-
-
-//! [2]
-QPushButton::staticMetaObject.className(); // returns "QPushButton"
-
-QObject *obj = new QPushButton;
-obj->metaObject()->className(); // returns "QPushButton"
-//! [2]
-
-
-//! [3]
-QObject *obj = new QTimer; // QTimer inherits QObject
-
-QTimer *timer = qobject_cast<QTimer *>(obj);
-// timer == (QObject *)obj
-
-QAbstractButton *button = qobject_cast<QAbstractButton *>(obj);
-// button == 0
-//! [3]
-
-
-//! [4]
-QTimer *timer = new QTimer; // QTimer inherits QObject
-timer->inherits("QTimer"); // returns true
-timer->inherits("QObject"); // returns true
-timer->inherits("QAbstractButton"); // returns false
-
-// QVBoxLayout inherits QObject and QLayoutItem
-QVBoxLayout *layout = new QVBoxLayout;
-layout->inherits("QObject"); // returns true
-layout->inherits("QLayoutItem"); // returns true (even though QLayoutItem is not a QObject)
-//! [4]
-
-
-//! [5]
-qDebug("MyClass::setPrecision(): (%s) invalid precision %f",
- qPrintable(objectName()), newPrecision);
-//! [5]
-
-
-//! [6]
-class MainWindow : public QMainWindow
-{
-public:
- MainWindow();
-
-protected:
- bool eventFilter(QObject *obj, QEvent *ev);
-
-private:
- QTextEdit *textEdit;
-};
-
-MainWindow::MainWindow()
-{
- textEdit = new QTextEdit;
- setCentralWidget(textEdit);
-
- textEdit->installEventFilter(this);
-}
-
-bool MainWindow::eventFilter(QObject *obj, QEvent *event)
-{
- if (obj == textEdit) {
- if (event->type() == QEvent::KeyPress) {
- QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
- qDebug() << "Ate key press" << keyEvent->key();
- return true;
- } else {
- return false;
- }
- } else {
- // pass the event on to the parent class
- return QMainWindow::eventFilter(obj, event);
- }
-}
-//! [6]
-
-
-//! [7]
-myObject->moveToThread(QApplication::instance()->thread());
-//! [7]
-
-
-//! [8]
-class MyObject : public QObject
-{
- Q_OBJECT
-
-public:
- MyObject(QObject *parent = 0);
-
-protected:
- void timerEvent(QTimerEvent *event);
-};
-
-MyObject::MyObject(QObject *parent)
- : QObject(parent)
-{
- startTimer(50); // 50-millisecond timer
- startTimer(1000); // 1-second timer
- startTimer(60000); // 1-minute timer
-}
-
-void MyObject::timerEvent(QTimerEvent *event)
-{
- qDebug() << "Timer ID:" << event->timerId();
-}
-//! [8]
-
-
-//! [9]
-QList<QObject *> list = window()->queryList("QAbstractButton"));
-foreach (QObject *obj, list)
- static_cast<QAbstractButton *>(obj)->setEnabled(false);
-//! [9]
-
-
-//! [10]
-QPushButton *button = parentWidget->findChild<QPushButton *>("button1");
-//! [10]
-
-
-//! [11]
-QListWidget *list = parentWidget->findChild<QListWidget *>();
-//! [11]
-
-
-//! [12]
-QList<QWidget *> widgets = parentWidget.findChildren<QWidget *>("widgetname");
-//! [12]
-
-
-//! [13]
-QList<QPushButton *> allPButtons = parentWidget.findChildren<QPushButton *>();
-//! [13]
-
-
-//! [14]
-monitoredObj->installEventFilter(filterObj);
-//! [14]
-
-
-//! [15]
-class KeyPressEater : public QObject
-{
- Q_OBJECT
- ...
-
-protected:
- bool eventFilter(QObject *obj, QEvent *event);
-};
-
-bool KeyPressEater::eventFilter(QObject *obj, QEvent *event)
-{
- if (event->type() == QEvent::KeyPress) {
- QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
- qDebug("Ate key press %d", keyEvent->key());
- return true;
- } else {
- // standard event processing
- return QObject::eventFilter(obj, event);
- }
-}
-//! [15]
-
-
-//! [16]
-KeyPressEater *keyPressEater = new KeyPressEater(this);
-QPushButton *pushButton = new QPushButton(this);
-QListView *listView = new QListView(this);
-
-pushButton->installEventFilter(keyPressEater);
-listView->installEventFilter(keyPressEater);
-//! [16]
-
-
-//! [17]
-MyWindow::MyWindow()
-{
- QLabel *senderLabel = new QLabel(tr("Name:"));
- QLabel *recipientLabel = new QLabel(tr("Name:", "recipient"));
-//! [17]
-}
-
-
-//! [18]
-int n = messages.count();
-showMessage(tr("%n message(s) saved", "", n));
-//! [18]
-
-
-//! [19]
-n == 1 ? tr("%n message saved") : tr("%n messages saved")
-//! [19]
-
-
-//! [20]
-label->setText(tr("F\374r \310lise"));
-//! [20]
-
-
-//! [21]
-if (receivers(SIGNAL(valueChanged(QByteArray))) > 0) {
- QByteArray data;
- get_the_value(&data); // expensive operation
- emit valueChanged(data);
-}
-//! [21]
-
-
-//! [22]
-QLabel *label = new QLabel;
-QScrollBar *scrollBar = new QScrollBar;
-QObject::connect(scrollBar, SIGNAL(valueChanged(int)),
- label, SLOT(setNum(int)));
-//! [22]
-
-
-//! [23]
-// WRONG
-QObject::connect(scrollBar, SIGNAL(valueChanged(int value)),
- label, SLOT(setNum(int value)));
-//! [23]
-
-
-//! [24]
-class MyWidget : public QWidget
-{
- Q_OBJECT
-
-public:
- MyWidget();
-
-signals:
- void buttonClicked();
-
-private:
- QPushButton *myButton;
-};
-
-MyWidget::MyWidget()
-{
- myButton = new QPushButton(this);
- connect(myButton, SIGNAL(clicked()),
- this, SIGNAL(buttonClicked()));
-}
-//! [24]
-
-
-//! [25]
-QObject::connect: Cannot queue arguments of type 'MyType'
-(Make sure 'MyType' is registered using qRegisterMetaType().)
-//! [25]
-
-
-//! [26]
-disconnect(myObject, 0, 0, 0);
-//! [26]
-
-
-//! [27]
-myObject->disconnect();
-//! [27]
-
-
-//! [28]
-disconnect(myObject, SIGNAL(mySignal()), 0, 0);
-//! [28]
-
-
-//! [29]
-myObject->disconnect(SIGNAL(mySignal()));
-//! [29]
-
-
-//! [30]
-disconnect(myObject, 0, myReceiver, 0);
-//! [30]
-
-
-//! [31]
-myObject->disconnect(myReceiver);
-//! [31]
-
-
-//! [32]
-if (QLatin1String(signal) == SIGNAL(valueChanged(int))) {
- // signal is valueChanged(int)
-}
-//! [32]
-
-
-//! [33]
-void on_<object name>_<signal name>(<signal parameters>);
-//! [33]
-
-
-//! [34]
-void on_button1_clicked();
-//! [34]
-
-
-//! [35]
-class MyClass : public QObject
-{
- Q_OBJECT
- Q_CLASSINFO("Author", "Pierre Gendron")
- Q_CLASSINFO("URL", "http://www.my-organization.qc.ca")
-
-public:
- ...
-};
-//! [35]
-
-
-//! [36]
-Q_PROPERTY(type name
- READ getFunction
- [WRITE setFunction]
- [RESET resetFunction]
- [NOTIFY notifySignal]
- [DESIGNABLE bool]
- [SCRIPTABLE bool]
- [STORED bool]
- [USER bool]
- [CONSTANT]
- [FINAL])
-//! [36]
-
-
-//! [37]
-Q_PROPERTY(QString title READ title WRITE setTitle USER true)
-//! [37]
-
-
-//! [38]
-class MyClass : public QObject
-{
- Q_OBJECT
- Q_ENUMS(Priority)
-
-public:
- MyClass(QObject *parent = 0);
- ~MyClass();
-
- enum Priority { High, Low, VeryHigh, VeryLow };
- void setPriority(Priority priority);
- Priority priority() const;
-};
-//! [38]
-
-
-//! [39a]
-class QLibrary : public QObject
-{
- ...
- Q_FLAGS(LoadHint LoadHints)
- ...
-//! [39a]
-
-//! [39b]
- ...
-public:
- enum LoadHint {
- ResolveAllSymbolsHint = 0x01,
- ExportExternalSymbolsHint = 0x02,
- LoadArchiveMemberHint = 0x04
- };
- Q_DECLARE_FLAGS(LoadHints, LoadHint)
- ...
-//! [39b]
-
-
-//! [40]
-//: This name refers to a host name.
-hostNameLabel->setText(tr("Name:"));
-
-/*: This text refers to a C++ code example. */
-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]
-
-//! [44]
-QLabel *label = new QLabel;
-QLineEdit *lineEdit = new QLineEdit;
-QObject::connect(lineEdit, &QLineEdit::textChanged,
- label, &QLabel::setText);
-//! [44]
-
-//! [45]
-void someFunction();
-QPushButton *button = new QPushButton;
-QObject::connect(button, &QPushButton::clicked, someFunction);
-//! [45]
-
-//! [46]
-QByteArray page = ...;
-QTcpSocket *socket = new QTcpSocket;
-socket->connectToHost("qt-project.org", 80);
-QObject::connect(socket, &QTcpSocket::connected, [=] () {
- socket->write("GET " + page + "\r\n");
- });
-//! [46]
-
-//! [47]
-disconnect(myObject, &MyObject::mySignal(), 0, 0);
-//! [47]
-
-//! [48]
-QObject::disconnect(lineEdit, &QLineEdit::textChanged,
- label, &QLabel::setText);
-//! [48]
-
-//! [meta data]
-//: This is a comment for the translator.
-//= qtn_foo_bar
-//~ loc-layout_id foo_dialog
-//~ loc-blank False
-//~ magic-stuff This might mean something magic.
-QString text = MyMagicClass::tr("Sim sala bim.");
-//! [meta data]
-
-//! [explicit tr context]
-QString text = QScrollBar::tr("Page up");
-//! [explicit tr context]